PUMP WITH VALVE WITH MOVEABLE VALVE MEMBER

Abstract

A pump assembly includes a power end, a fluid end, and a valve assembly located in the fluid end. The valve assembly includes a valve seat and a valve member including a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat. The valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

Description

BACKGROUND

High-pressure pumps having reciprocating elements such as plungers or pistons are commonly employed in oil and gas production fields for operations such as drilling and well servicing. For instance, one or more reciprocating pumps may be employed to pump fluids into a wellbore in conjunction with activities including fracturing, acidizing, remediation, cementing, and other stimulation or servicing activities. Due to the harsh conditions associated with such activities, many considerations are generally considered when designing a pump for use in oil and gas operations. One design consideration may concern lifetime and reliability of pump fluid end components, as reciprocating pumps used in wellbore operations, for example, often encounter high cyclical pressures and various other conditions that can render pump components susceptible to wear and result in a need for servicing and maintenance of the pump. Another design consideration is the type of fluids being pumped. Some fluids may be slurries that include a solid component. The solid component in the fluid may become an obstruction in the operation of some pump components. For example, valve assemblies can include valve guides that position a valve body relative to a valve seat. Valve guides in slurry pumps require increased clearance or “slop” between the valve stem and the valve guide to account for high proppant concentrations which can bridge and bind in tight clearance areas. Typical frac pumps utilize valving in the vertical or near vertical position in which this high clearance or sloppy fit does not interfere with valve performance. However, concentric style fluid ends can utilize valving a horizontal orientation that proves troublesome in operation by biasing the required valve guide clearance all to one side, such that the valve stem is off center, leading to uneven valve, seat, and guide wear.

Accordingly, it is desirable to provide a pump with a fluid end that enhances a life of components therein, such as a valve assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the pump with valve with flexible connection are described with reference to the following figures. The same or sequentially similar numbers are used throughout the figures to reference like features and components. The features depicted in the figures are not necessarily shown to scale. Certain features of the embodiments may be shown exaggerated in scale or in somewhat schematic form, and some details of elements may not be shown in the interest of clarity and conciseness.

FIG. 1 is an elevation view of a reciprocating pump, according to one or more embodiments of this disclosure.

FIG. 2A is a cut-away illustration of an exemplary reciprocating pump comprising a concentric bore pump fluid end, according to one or more embodiments of the present disclosure.

FIG. 2B is a cut-away illustration of an exemplary reciprocating pump comprising a cross-bore pump fluid end, according to one or more embodiments of the present disclosure.

FIG. 3 is cut-away illustration of a pump power end of a pump, according to one or more embodiments of the present disclosure.

FIG. 4 is a schematic of a horizontal valve assembly, according to one or more embodiments of the present disclosure.

FIGS. 5A and 5B are schematics of a valve assembly, according to embodiments of the present disclosure, in a closed configuration and where an obstruction is in the valve assembly.

FIG. 6 is a schematic of another valve assembly of this disclosure.

FIG. 7 is a schematic representation of an embodiment of a wellbore servicing system, according to embodiments of this disclosure.

DETAILED DESCRIPTION

It should be understood at the outset that although an illustrative implementation of one or more embodiments are provided below, the disclosed systems and/or methods may be implemented using any number of techniques, whether currently known or in existence. The disclosure should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, including the exemplary designs and implementations illustrated and described herein, but may be modified within the scope of the appended claims along with their full scope of equivalents.

Disclosed herein is a reciprocating apparatus for pumping pressurized fluid that is part of a pump assembly. In embodiments, the reciprocating apparatus comprises a pump fluid end containing a valve assembly that is operable with a power end of the pump assembly. The valve assembly of this disclosure comprises a horizontal valve assembly that includes a valve seat and a valve body contact surface. The valve assembly also comprises a valve guide, and a valve member that includes a valve body connected to a valve stem. The valve stem translates in the valve guide to move the valve member between a closed configuration, where the valve body contacts the valve seat in a sealing arrangement to prevent fluid flow through the valve assembly, and an open configuration, where the valve body is separated from the valve seat to allow fluid flow through the valve assembly. The valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable. The valve member is movable by either the valve body pivoting relative to the valve stem or by bending the valve stem.

In embodiments, the reciprocating apparatus is a high-pressure pump configured to operate at a pressure greater than or equal to about 3,000 psi (21 MPa) and/or in a well servicing operation and environment. As detailed further herein below, utilization of a valve assembly of this disclosure as a suction valve assembly and/or a discharge valve assembly of a pump can increase a life and/or reduce a cost relative to a conventional valve assembly by accommodating obstructions that may lodge between the valve body and the valve seat in the closed configuration, thus reducing maintenance cost and downtime for maintenance of the pump.

A reciprocating apparatus of this disclosure may comprise any suitable pump operable to pump fluid, including slurries. Non-limiting examples of suitable pumps include, but are not limited to, piston pumps, plunger pumps, and the like. In embodiments, the pump is a rotary- or reciprocating-type pump such as a positive displacement pump operable to displace pressurized fluid. The pump comprises a pump power end, a pump fluid end, and an integration section whereby a reciprocating element (e.g., a plunger) can be mechanically connected with the pump power end such that the reciprocating element can be reciprocated within a reciprocating element bore of the pump fluid end.

FIG. 1 is an elevation view (e.g., side view) of a pump 10 (e.g., a reciprocating pump) according to an exemplary embodiment, the reciprocating pump comprises a pump power end 12, a pump fluid end 22, and an integration section 11. As illustrated in FIG. 1, pump fluid end has a front S1 opposite a back S2 along a first or x-axis, a top S3 opposite a bottom S4 along a second or y-axis, wherein the y-axis is in the same plane as and perpendicular to the x-axis, and a left side and a right side along a z-axis, wherein the z-axis is along a plane perpendicular to the plane of the x-axis and the y-axis. Accordingly, toward the top of pump fluid end 22 (and pump 10) is along the y-axis toward top S3, toward the bottom of pump fluid end 22 (and pump 10) is along the y-axis toward bottom S4, toward the front of pump fluid end 22 (and pump 10) is along the x-axis toward front S1, and toward the back of pump fluid end 22 (and pump 10) is along the x-axis away from front S1.

The pump fluid end 22 is integrated with the pump power end 12 via the integration section 11, such that pump power end 12 is operable to reciprocate the reciprocating element 18 within a reciprocating element bore 24 (FIGS. 2A and 2B) of the pump fluid end 22. The reciprocating element bore 24 is at least partially defined by a cylinder wall 26. As described further herein below with reference to FIGS. 2A and 2B, pump fluid end 22 can be a multi-bore pump fluid end (also referred to herein as a cross-bore pump fluid end) 22 or, alternatively, an in-line or “concentric” bore pump fluid end. As utilized herein, multi-bore pump fluid ends can comprise “T-bore” pump fluid ends, “X-bore” (e.g., cross shaped bore) pump fluid ends, or “Y-bore” pump fluid ends.

FIG. 2A is a schematic showing a concentric bore pump fluid end 22 engaged with a reciprocating element 18. FIG. 2B is a schematic showing a T-bore pump fluid end 22 engaged with a reciprocating element 18. In a T-bore pump fluid end 22, reciprocating element bore 24 and T-bore 25 are perpendicular, making the shape of a “T”. As discussed further below, the pump 10 includes at least one fluid inlet 38 for receiving fluid from a fluid source, e.g., a suction line, suction header, storage or mix tank, blender, discharge from a boost pump such as a centrifugal pump, etc. The pump 10 also includes at least one discharge outlet 54 for discharging fluid to a discharge source, e.g., a flowmeter, pressure monitoring and control system, distribution header, discharge line, wellhead, discharge manifold pipe, and the like.

The pump 10 may comprise any suitable pump power end 12 for enabling the pump 10 to perform pumping operations (e.g., pumping a wellbore servicing fluid downhole). Similarly, the pump 10 may include any suitable housing 14 for containing and/or supporting the pump power end 12 and components thereof. The housing 14 may comprise various combinations of inlets, outlets, channels, and the like for circulating and/or transferring fluid. Additionally, the housing 14 may include connections to other components and/or systems, such as, but not limited to, pipes, tanks, drive mechanisms, etc. Furthermore, the housing 14 may be configured with cover plates or entryways for permitting access to the pump power end 12 and/or other pump components. As such, the pump 10 may be inspected to determine whether parts need to be repaired or replaced. The pump power end may also be hydraulically driven, whether it is a non-intensifying or an intensifying system.

The pump 10 can be an oilfield services pump configured to pump a wellbore servicing fluid. Examples of wellbore servicing fluids suitable include, but are not limited to, cementitious fluids (e.g., cement slurries), drilling fluids or muds, spacer fluids, fracturing fluids or completion fluids, and gravel pack fluids, remedial fluids, perforating fluids, sealants, drilling fluids, completion fluids, diverter fluids, gelation fluids, polymeric fluids, aqueous fluids, oleaginous fluids, etc. The pump 10 can be used in oilfield and/or well servicing operations which include, but are not limited to, drilling operations, fracturing operations, perforating operations, fluid loss operations, primary cementing operations, secondary or remedial cementing operations, or any combination of operations thereof.

Those versed in the art will understand that the pump power end 12 may include various components commonly employed in pumps. Pump power end 12 can be any suitable pump known in the art and with the help of this disclosure to be operable to reciprocate reciprocating element 18 in reciprocating element bore 24. For example, without limitation, pump power end 12 can be operable via and comprise a crank and slider mechanism, a powered hydraulic/pneumatic/steam cylinder mechanism or various electric, mechanical, or electro-mechanical drives.

FIG. 3 provides a cutaway illustration of an exemplary pump 10 of this disclosure, showing an exemplary pump power end 12, integrated via integration section 11 with a pump fluid end 22, wherein the pump power end 12 is operable to reciprocate the reciprocating element 18 within a reciprocating element bore 24 of the pump fluid end 22. Briefly, for example, the pump power end 12 may include a rotatable crankshaft 16 attached to at least one reciprocating element 18 (e.g., a plunger or piston) by way of a crank arm/connecting rod 21. Additionally, an engine (e.g., a diesel engine), motor, or other suitable power source may be operatively connected to the crankshaft 16 (e.g., through a transmission and drive shaft) and operable to actuate rotation thereof. In operation, rotation of the crankshaft 16 induces translational movement of the crank arm/connecting rod 20, thereby causing the reciprocating element 18 to extend and retract along a flow path, which may generally be defined by a central axis 17 within a reciprocating element bore 24 (sometimes referred to herein for brevity as a “reciprocating element bore 24” or simply a “bore 24”, and not wishing to be limited to a particular reciprocating element 18). Pump 10 of FIG. 1 is typically mounted on a movable structure such as a semi-tractor trailer or skid, and the moveable structure may contain additional components, such as a motor or engine (e.g., a diesel engine), that provides power (e.g., mechanical motion) to the pump power end 12 (e.g., a crankcase comprising crankshaft 16 and related connecting rods 20).

As noted herein above, the pump 10 comprises a pump fluid end 22 attached to the pump power end 12. Various embodiments of the pump fluid end 22 are described in detail below in connection with other drawings, for example FIGS. 2A and 2B. Generally, the pump fluid end 22 comprises at least one fluid inlet 38 for receiving fluid, and at least one discharge outlet 54 through which fluid flows out of the discharge chamber 53. The pump fluid end 22 also comprises at least one valve assembly for controlling the receipt and output of fluid. For example, the pump fluid end 22 can comprise a suction valve assembly 56 and a discharge valve assembly 72. The pump fluid end 22 may include any suitable component(s) and/or structure(s) for containing and/or supporting the reciprocating element 18 and providing a cylinder wall 26 at least partially defining a reciprocating element bore 24 along which the pump power end can reciprocate the reciprocating element during operation of the pump.

The pump fluid end 22 may comprise a cylinder wall 26 at least partially defining a bore 24 through which the reciprocating element 18 may extend and retract. Additionally, the bore 24 may be in fluid communication with a discharge chamber 53 formed within the pump fluid end 22. Such a discharge chamber 53, for example, may be configured as a pressurized discharge chamber 53 having a discharge outlet 54 through which fluid is discharged by the reciprocating element 18. Thus, the reciprocating element 18 may be movably disposed within the reciprocating element bore 24, which may provide a fluid flow path into and/or out of the pump chamber. During operation of the pump 10, the reciprocating element 18 may be configured to reciprocate along a path (e.g., along central axis 17 within bore 24 and/or pump chamber 28, which corresponds to reciprocal movement parallel to the x-axis of FIG. 1) to transfer a supply of fluid to the pump chamber 28 and/or discharge fluid from the pump chamber 28.

In operation, the reciprocating element 18 extends and retracts along a flow path to alternate between providing forward strokes (also referred to as discharge strokes and correlating to movement in a positive direction parallel to the x-axis of FIG. 1, indicated by arrow 117) and return strokes (also referred to as suction strokes and correlating to movement in a negative direction parallel to the x-axis of FIG. 1, indicated by arrow 116), respectively. During a forward stroke, the reciprocating element 18 extends away from the pump power end 12 and toward the pump fluid end 22. Before the forward stoke begins, the reciprocating element 18 is in a fully retracted position (also referred to as bottom dead center (BDC) with reference to the crankshaft 16), in which case the suction valve assembly 56 can be in a closed configuration having allowed fluid to flow into the (e.g., high pressure) pump chamber 28. (As utilized here, “high pressure” indicates possible subjection to high pressure during discharge.) When discharge valve assembly 72 is in a closed configuration (e.g., under the influence of a closing mechanism, such as a spring), the high pressure in a discharge pipe or manifold containing discharge outlet 54 prevents fluid flow into discharge chamber 53 and causes pressure in the pump chamber 28 to accumulate upon stroking of the reciprocating element 18. When the reciprocating element 18 begins the forward stroke, the pressure builds inside the pump chamber 28 and acts as an opening force that results in positioning of the discharge valve assembly 72 in an open configuration, while a closing force (e.g., via a closing mechanism, such as a spring and/or pressure increase inside pump chamber 28) urges the suction valve assembly 56 into a closed configuration. When utilized in connection with a valve assembly, “open” and “closed” refer, respectively, to a configuration in which fluid can flow through the valve assembly (e.g., can pass between a valve body (e.g., a movable poppet) and a valve seat thereof) and a configuration in which fluid cannot flow through the valve assembly (e.g., cannot pass between a valve body (e.g., a movable poppet) and a valve seat thereof). As the reciprocating element 18 extends forward, fluid within the pump chamber 28 is discharged through the discharge outlet 54.

During a return stroke, the reciprocating element 18 reciprocates or retracts away from the pump fluid end 22 and towards the pump power end 12 of the pump 10. Before the return stroke begins, the reciprocating element 18 is in a fully extended position (also referred to as top dead center (TDC) with reference to the crankshaft 16), in which case the discharge valve assembly 72 can be in a closed configuration having allowed fluid to flow out of the pump chamber 28 and the suction valve assembly 56 is in a closed configuration. When the reciprocating element 18 begins and retracts towards the pump power end 12, the discharge valve assembly 72 assumes a closed configuration, while the suction valve assembly 56 opens. As the reciprocating element 18 moves away from the discharge valve 72 during a return stroke, fluid flows through the suction valve assembly 56 and into the pump chamber 28.

With reference to the embodiment of FIG. 2A, which is a schematic showing a concentric pump fluid end 22 engaged with a reciprocating element 18, concentric bore pump fluid end 22 comprises a concentric bore fluid end body 8, a concentric pump chamber 28, a suction valve assembly 56, and a discharge valve assembly 72. In this concentric bore configuration of FIG. 2A, suction valve assembly 56 and discharge valve assembly 72 are positioned in-line (also referred to as coaxial) with reciprocating element bore 24, i.e., central axis 17 of reciprocating element bore 24 is also the central axis of suction pump assembly 56 and discharge valve assembly 72).

With reference to the embodiment of FIG. 2B, which is a schematic showing a T-bore pump fluid end 22 engaged with a reciprocating element 18, T-bore pump fluid end 22 comprises a T-bore fluid end body 8, a T-shaped pump chamber 28, a suction valve assembly 56, and a discharge valve assembly 72. In this T-bore configuration of FIG. 2B, suction valve assembly 56 is coupled with front end 60 of reciprocating element 18 and discharge valve assembly 72 is positioned in bore 25 that makes a tee with reciprocating element bore 24, i.e., central axis 17 of reciprocating element bore 24 is also the central axis of suction pump assembly 56 and perpendicular to a central axis 27 of discharge valve assembly 72).

Suction valve assembly 56 and discharge valve assembly 72 are operable to direct fluid flow within the pump 10. In pump fluid end 22 designs of this disclosure, fluid flows within a hollow reciprocating element (e.g., a hollow plunger) 18 via fluid inlet 38 located toward tail end 62 of reciprocating element 18. The reciprocating element bore 24 of such a fluid end design can be defined by a high-pressure cylinder or cylinder wall 26 providing a high-pressure chamber. (As utilized here, “high-pressure” indicates possible subjection to high pressure during discharge.) When reciprocating element 18 retracts, or moves along central axis 17 in a direction away from the pump chamber 28 and pump fluid end 22 and toward pump power end 12 (as indicated by arrow 116), a suction valve of the suction valve assembly 56 opens (e.g., either under natural flow and/or other biasing means), and a discharge valve of discharge valve assembly 72 will be closed, whereby fluid enters pump chamber 28 via a fluid inlet 38. For a pump fluid end 22 design of this disclosure, the fluid inlet 38 is configured to introduce fluid into pump chamber 28 via a reciprocating element 18 that is hollow. When the reciprocating element 18 reverses direction, due to the action of the pump power end 12, the reciprocating element 18 reverses direction along central axis 17, now moving in a direction toward the pump chamber 28 and pump fluid end 22 and away from pump power end 12 (as indicated by arrow 117), and the discharge valve of discharge valve assembly 72 is open and the suction valve of suction valve assembly 56 is closed (e.g., again either due to fluid flow and/or other biasing means of valve control), such that fluid is pumped out of pump chamber 28 via discharge chamber 53 and discharge outlet 54.

A pump 10 of this disclosure can comprise one or more access ports. With reference to the concentric fluid end body 8 embodiment of FIG. 2A, a front access port 30A can be located on a front S1 of the pump fluid end 22 opposite a back S2 of the pump fluid end 22, wherein the back S2 of the pump fluid end is proximal the pump power end 12, upon integration therewith via integration section 11. With reference to the T-bore fluid end body 8 embodiment of FIG. 2B, a front access port 30A can be located on a front S1 of the pump fluid end 22 opposite a back S2 of the pump fluid end 22, wherein the back S2 of the pump fluid end is proximal the pump power end 12, upon integration therewith via integration section 11, and a top access port 30B can be located on a top S3 of the pump fluid end 22 opposite a bottom S4 of pump fluid end 22. Locations described as front S1, back S2, top S3, and bottom S4 are further described with reference to the x-y-z coordinate system shown in FIG. 1 and further can be relative to a surface (e.g., a trailer bed, the ground, a platform, etc.) upon which the pump 10 is located, a bottom S4 of the pump fluid end being proximal the surface (e.g., trailer bed) upon which the pump 10 is located. Generally, due to size and positioning of pump 10, the front S1 and top S3 of the pump fluid end 22 are more easily accessible than a back S2 or bottom S4 thereof. In a similar manner, a front of pump 10 is distal the pump power end 12 and a back of the pump 10 is distal the pump fluid end 22. The integration section 11 can be positioned in a space between the pump fluid end 22 and the pump power end 12, and can be safeguarded (e.g., from personnel) via a cover 15.

A pump 10 of this disclosure can be a multiplex pump comprising a plurality of reciprocating assemblies (e.g., reciprocating elements 18, and a corresponding plurality of reciprocating element bores 24, suction valve assemblies 56, and discharge valve assemblies 72). The plurality can comprise any number such as, for example, 2, 3, 4, 5, 6, 7, or more. For example, in embodiments, pump 10 is a triplex pump, wherein the plurality comprises three. In alternative embodiments, pump 10 comprises a quintuplex pump, wherein the plurality comprises five.

In embodiments, a pump fluid end 22 and pump 10 of this disclosure comprise at least one access port. In embodiments, the at least one access port is located on a side of the discharge valve assembly 72 opposite the suction valve assembly 56. For example, in the concentric bore pump fluid end 22 embodiment of FIG. 2A, front access port 30A is located on a side (e.g., front side) of discharge valve assembly 72 opposite suction valve assembly 56. In the T-bore pump fluid end 22 embodiment of FIG. 2B, front access port 30A is located on top S3 of pump fluid end 22.

In embodiments, one or more seals 29 (e.g., “o-ring” seals, packing seals, or the like), also referred to herein as ‘primary’ reciprocating element packing 29 (or simply “packing 29”) may be arranged around the reciprocating element 18 to provide sealing between the outer walls of the reciprocating element 18 and the inner walls 26 defining at least a portion of the reciprocating element bore 24. In some concentric bore fluid end designs, a second set of seals (also referred to herein as ‘secondary’ reciprocating element packing; not shown in the Figures) may be fixedly arranged around the reciprocating element 18 to provide sealing between the outer walls of the reciprocating element 18 and the inner walls of a low-pressure cylinder that defines the low pressure chamber described hereinabove (e.g., wherein the secondary packing is farther back along the x-axis and delineates a back end of the low pressure chamber that extends from the primary packing 29 to the secondary packing). Skilled artisans will recognize that the seals may comprise any suitable type of seals, and the selection of seals may depend on various factors e.g., fluid, temperature, pressure, etc.

While the foregoing discussion focused on a pump fluid end 22 comprising a single reciprocating element 18 disposed in a single reciprocating element bore 24, it is to be understood that the pump fluid end 22 may include any suitable number of reciprocating elements. As discussed further below, for example, the pump 10 may comprise a plurality of reciprocating elements 18 and associated reciprocating element bores 24 arranged in parallel and spaced apart along the z-axis of FIG. 1 (or another arrangement such as a V block or radial arrangement). In such a multi-bore pump, each reciprocating element bore may be associated with a respective reciprocating element and crank arm, and a single common crankshaft may drive each of the plurality of reciprocating elements and crank arms. Alternatively, a multi-bore pump may include multiple crankshafts, such that each crankshaft may drive a corresponding reciprocating element. Furthermore, the pump 10 may be implemented as any suitable type of multi-bore pump. In a non-limiting example, the pump 10 may comprise a triplex pump having three reciprocating elements 18 (e.g., plungers or pistons) and associated reciprocating element bores 24, discharge valve assemblies 72 and suction valve assemblies 56, or a quintuplex pump having five reciprocating elements 18 and five associated reciprocating element bores 24, discharge valve assemblies 72 and suction valve assemblies 56.

Reciprocating element bore 24 can have an inner diameter slightly greater than the outer diameter of the reciprocating element 18, such that the reciprocating element 18 may sufficiently reciprocate within reciprocating element bore 24 (optionally, within a sleeve, as described hereinbelow). In embodiments, the fluid end body 8 of pump fluid end 22 has a pressure rating ranging from about 100 psi (0.7 MPa) to about 3000 psi (21 MPa), or from about 2000 psi (14 MPa) to about 10,000 psi (69 MPa), from about 5000 psi (34 MPa) to about 30,000 psi (207 MPa), or from about 3000 psi (21 MPa) to about 50,000 psi (345 MPa) or greater. The fluid end body 8 of pump fluid end 22 may be cast, forged, machined, printed or formed from any suitable materials, e.g., steel, metal alloys, or the like. Those versed in the art will recognize that the type and condition of material(s) suitable for the fluid end body 8 may be selected based on various factors. In a wellbore servicing operation, for example, the selection of a material may depend on flow rates, pressure rates, wellbore service fluid types (e.g., particulate type and/or concentration present in particle laden fluids such as fracturing fluids or drilling fluids, or fluids comprising cryogenic/foams), etc. Moreover, the fluid end body 8 (e.g., cylinder wall 26 defining at least a portion of reciprocating element bore 24 and/or pump chamber 28) may include protective coatings for preventing and/or resisting abrasion, erosion, and/or corrosion.

In embodiments, the cylindrical shape (e.g., providing cylindrical wall(s) 26) of the fluid end body 8 may be pre-stressed in an initial compression. Moreover, a high-pressure cylinder(s) providing the cylindrical shape (e.g., providing cylindrical wall(s) 26) may comprise one or more sleeves (e.g., heat-shrinkable sleeves). Additionally, or alternatively, the high-pressure cylinder(s) may comprise one or more composite overwraps and/or concentric sleeves (“over-sleeves”), such that an outer wrap/sleeve pre-loads an inner wrap/sleeve. The overwraps and/or over-sleeves may be non-metallic (e.g., fiber windings) and/or constructed from relatively lightweight materials. Overwraps and/or over-sleeves may be added to increase fatigue strength and overall reinforcement of the components.

The cylinders and cylindrical-shaped components (e.g., providing cylindrical wall 26) associated with the pump fluid end body 8 of pump fluid end 22 may be held in place within the pump 10 using any appropriate technique. For example, components may be assembled and connected, e.g., bolted, welded, etc. Additionally, or alternatively, cylinders may be press-fit (e.g., interference fit) into openings machined or cast into the pump fluid end 22 or other suitable portion of the pump 10. Such openings may be configured to accept and rigidly hold cylinders (e.g., having cylinder wall(s) 26 at least partially defining reciprocating element bore 24) in place to facilitate interaction of the reciprocating element 18 and other components associated with the pump 10.

In embodiments, the reciprocating element 18 comprises a plunger or a piston. While the reciprocating element 18 may be described herein with respect to embodiments comprising a plunger, it is to be understood that the reciprocating element 18 may comprise any suitable component for displacing fluid. In a non-limiting example, the reciprocating element 18 may be a piston. As those versed in the art will readily appreciate, a piston-type pump generally employs sealing elements (e.g., rings, packing, etc.) attached to the piston and movable therewith. In contrast, a plunger-type pump generally employs fixed or static seals (e.g., primary seal or packing 29) through which the plunger moves during each stroke (e.g., suction stroke or discharge stroke).

As skilled artisans will understand, the reciprocating element 18 may include any suitable size and/or shape for extending and retracting along a flow path within the pump fluid end 22. For instance, reciprocating element 18 may comprise a generally cylindrical shape, and may be sized such that the reciprocating element 18 can sufficiently slide against or otherwise interact with the inner cylinder wall 26. In embodiments, one or more additional components or mechanical linkages 48 (FIG. 3; e.g., clamps, adapters, extensions, etc.) may be used to couple the reciprocating element 18 to the pump power end 12 (e.g., to a pushrod 9).

In some embodiments (e.g., T-bore pump fluid end 22 embodiments such as FIG. 2B), the reciprocating element 18 may be substantially solid and/or impermeable (e.g., not hollow). In some embodiments, reciprocating element 18 employed in a concentric bore pump fluid end 22 embodiment (such as depicted in FIG. 2A) or a cross-bore pump fluid end 22 (such as depicted in FIG. 2B) comprises a peripheral wall defining a hollow body. Additionally (e.g., concentric bore pump fluid end 22 embodiments such as FIG. 2A), a portion of the peripheral wall of reciprocating element 18 may be generally permeable or may include an input through which fluid may enter the hollow body and an output through which fluid may exit the hollow body. Furthermore, while the reciprocating element 18 may, in embodiments, define a substantially hollow interior and include a ported body, a base of the reciprocating element 18 proximal the pump power end, when assembled, may be substantially solid and/or impermeable (e.g., a plunger having both a hollow portion and a solid portion).

The reciprocating element 18 comprises a front or free end 60. In embodiments comprising concentric bore pump fluid end designs 22 such as shown in FIG. 2A, the reciprocating element 18 can contain or at least partially contain the suction valve assembly 56. In embodiments, the suction valve assembly 56 is at least partially disposed within the reciprocating element 18 at or proximate to the front end 60 thereof. At an opposite or tail end 62 (also referred to as back or tail end 62) of the reciprocating element 18, the reciprocating element 18 may include a base coupled to the pump power end 12 of the pump 10 (e.g., via crank arm 20). In embodiments, the tail end 62 of the reciprocating element 18 is coupled to the pump power end 12 outside of pump fluid end 22, e.g., within integration section 11.

As noted above, pump fluid end 22 contains a suction valve assembly 56. Suction valve assembly 56 may alternately open or close to permit or prevent fluid flow. Skilled artisans will understand that the suction valve assembly 56 may be of any suitable type or configuration (e.g., gravity- or spring-biased, flow activated, etc.). Those versed in the art will understand that the suction valve assembly 56 may be disposed within the pump fluid end 22 at any suitable location therein. For instance, the suction valve assembly 56 may be disposed within reciprocating element bore 24 and at least partially within reciprocating element 18 in concentric bore pump fluid end 22 designs such as FIG. 2A or T-bore pump fluid end 22 designs such as FIG. 2B, such that a suction valve body of the suction valve assembly 56 moves away from a suction valve seat within the a suction valve seat housing of reciprocating element 18 when the suction valve assembly 56 is opening and toward the suction valve seat when the suction valve assembly 56 is closing.

Pump 10 comprises a discharge valve assembly 72 for controlling the output of fluid through discharge chamber 53 and discharge outlet 54. Analogous to the suction valve assembly 56, the discharge valve assembly 72 may alternately open or close to permit or prevent fluid flow. Those versed in the art will understand that the discharge valve assembly 72 may be disposed within the pump chamber at any suitable location therein. For instance, the discharge valve assembly 72 may be disposed proximal the front S1 of bore 24 (e.g., at least partially within discharge chamber 53 and/or pump chamber 28) of the pump fluid end 22, such that a discharge valve body of the discharge valve assembly 72 moves toward the discharge chamber 53 when the discharge valve assembly 72 is in an open configuration and away from the discharge chamber 53 when the discharge valve assembly 72 is in a closed configuration. In addition, in concentric bore pump fluid end 22 configurations such as FIG. 2A, the discharge valve assembly 72 may be co-axially aligned with the suction valve assembly 56 (e.g., along central axis 17), and the suction valve assembly 56 and the discharge valve assembly 72 may be coaxially aligned with the reciprocating element 18 (e.g., along central axis 17). In alternative embodiments, such as the T-bore pump fluid end 22 embodiment of FIG. 2B, discharge valve assembly 72 can be positioned within T-bore 25, at least partially within discharge chamber 53 and/or pump chamber 28, and have a central axis coincident (e.g., coaxial) with central axis 27 of T-bore 25.

Further, the suction valve assembly 56 and the discharge valve assembly 72 can comprise any suitable mechanism for opening and closing valves. For example, the suction valve assembly 56 and the discharge valve assembly 72 can comprise a suction valve spring and a discharge valve spring, respectively. Additionally, any suitable structure (e.g., valve assembly comprising sealing rings, stems, poppets, etc.) and/or components may be employed suitable means for retaining the components of the suction valve assembly 56 and the components of the discharge valve assembly 72 within the pump fluid end 22 may be employed.

The fluid inlet 38 may be arranged within any suitable portion of the pump fluid end 22 and configured to supply fluid to the pump in any direction and/or angle. Moreover, the pump fluid end 22 may comprise and/or be coupled to any suitable conduit (e.g., pipe, tubing, or the like) through which a fluid source may supply fluid to the fluid inlet 38. The pump 10 may comprise and/or be coupled to any suitable fluid source for supplying fluid to the pump via the fluid inlet 38. In embodiments, the pump 10 may also comprise and/or be coupled to a pressure source such as a boost pump (e.g., a suction boost pump) fluidly connected to the pump 10 (e.g., via inlet 38) and operable to increase or “boost” the pressure of fluid introduced to pump 10 via fluid inlet 38. A boost pump may comprise any suitable type including, but not limited to, a centrifugal pump, a gear pump, a screw pump, a roller pump, a scroll pump, a piston/plunger pump, or any combination thereof. For instance, the pump 10 may comprise and/or be coupled to a boost pump known to operate efficiently in high-volume operations and/or may allow the pumping rate therefrom to be adjusted. Skilled artisans will readily appreciate that the amount of added pressure may depend and/or vary based on factors such as operating conditions, application requirements, etc. In embodiments, the boost pump may have an outlet pressure greater than or equal to about 70 psi (0.5 MPa), about 80 psi (0.6 MPa), or about 110 psi (0.8 MPa), providing fluid to the suction side of pump 10 at about said pressures. Additionally, or alternatively, the boost pump may have a flow rate of greater than or equal to about 80 bbl/min (0.21 m³/sec), about 70 BPM bbl/min (0.19 m³/sec), and/or about 50 bbl/min (0.13 m³/sec).

As noted hereinabove, the pump 10 may be implemented as a multi-cylinder pump comprising multiple cylindrical reciprocating element bores 24 and corresponding components. In embodiments, the pump 10 is a triplex pump in which the pump fluid end 22 comprises three reciprocating assemblies, each reciprocating assembly comprising a suction valve assembly 56, a discharge valve assembly 72, a pump chamber 28, a fluid inlet 38, a discharge outlet 54, and a reciprocating element bore 24 within which a corresponding reciprocating element 18 reciprocates during operation of the pump 10 via connection therewith to a (e.g., common) pump power end 12. In embodiments, the pump 10 is a quintuplex pump in which the pump fluid end 22 comprises five reciprocating assemblies. In a non-limiting example, the pump 10 may be a Q-10™ quintuplex pump or an HT-400™ triplex pump, produced by Halliburton Energy Services, Inc.

In embodiments, the pump fluid end 22 may comprise an external manifold (e.g., a suction header) for feeding fluid to the multiple reciprocating assemblies via any suitable inlet(s). Additionally, or alternatively, the pump fluid end 22 may comprise separate conduits such as hoses fluidly connected to separate inlets for inputting fluid to each reciprocating assembly. Of course, numerous other variations may be similarly employed, and therefore, fall within the scope of the present disclosure.

Those skilled in the art will understand that the reciprocating elements of each of the reciprocating assemblies may be operatively connected to the pump power end 12 of the pump 10 according to any suitable manner. For instance, separate connectors (e.g., cranks arms/connecting rods 21, one or more additional components or mechanical linkages 48, pushrods 9, etc.) associated with the pump power end 12 may be coupled to each reciprocating element body or tail end 62. The pump 10 may employ a common crankshaft (e.g., crankshaft 16) or separate crankshafts to drive the multiple reciprocating elements.

As previously discussed, the fluid inlet(s) 38 may receive a supply of fluid from any suitable fluid source, which may be configured to provide a constant fluid supply. Additionally, or alternatively, the pressure of supplied fluid may be increased by adding pressure (e.g., boost pressure) as described previously. In embodiments, the fluid inlet(s) 38 receive a supply of pressurized fluid comprising a pressure ranging from about 30 psi (0.2 MPa) to about 300 psi (2.1 MPa).

Additionally, or alternatively, the one or more discharge outlet(s) 54 may be fluidly connected to a common collection point such as a sump or distribution manifold, which may be configured to collect fluids flowing out of the fluid outlet(s) 54, or another cylinder bank and/or one or more additional pumps.

During pumping, the multiple reciprocating elements 18 will perform forward and returns strokes similarly, as described hereinabove. In embodiments, the multiple reciprocating elements 18 can be angularly offset to ensure that no two reciprocating elements are located at the same position along their respective stroke paths (i.e., the plungers are “out of phase”). For example, the reciprocating elements may be angularly distributed to have a certain offset (e.g., 120 degrees of separation in a triplex pump) to minimize undesirable effects that may result from multiple reciprocating elements of a single pump simultaneously producing pressure pulses. The position of a reciprocating element is generally based on the number of degrees a pump crankshaft (e.g., crankshaft 16) has rotated from a bottom dead center (BDC) position. The BDC position corresponds to the position of a fully retracted reciprocating element at zero velocity, e.g., just prior to a reciprocating element moving (i.e., in a direction indicated by arrow 117 in FIGS. 2A-2B and FIG. 3) forward in its cylinder. A top dead center position corresponds to the position of a fully extended reciprocating element at zero velocity, e.g., just prior to a reciprocating element moving backward (i.e., in a direction indicated by arrow 116 in FIGS. 2A and 2B) in its cylinder.

As described above, each reciprocating element 18 is operable to draw in fluid during a suction (backward or return) stroke and discharge fluid during a discharge (forward) stroke. Skilled artisans will understand that the multiple reciprocating elements 18 may be angularly offset or phase-shifted to improve fluid intake for each reciprocating element 18. For instance, a phase degree offset (at 360 degrees divided by the number of reciprocating elements) may be employed to ensure the multiple reciprocating elements 18 receive fluid and/or a certain quantity of fluid at all times of operation. In one implementation, the three reciprocating elements 18 of a triplex pump may be phase-shifted by a 120-degree offset. Accordingly, when one reciprocating element 18 is at its maximum forward stroke position, a second reciprocating element 18 will be 60 degrees through its discharge stroke from BDC, and a third reciprocating element will be 120 degrees through its suction stroke from top dead center (TDC).

According to this disclosure, and as described further herein, a horizontal valve assembly comprises a valve guide, a valve body, and a valve stem connecting the valve body to the valve guide.

Referring to FIG. 4, a horizontal valve assembly 100 with a horizontal central axis 17 and that comprises a horizontal guided valve 101 disposed within a housing 65 having a valve seat 68 and a valve body contact surface 69. The valve seat 68 and valve body contact surface 69 may be an insert placed within the housing 65 or may be integral with the housing 65. The guided valve 101 comprises a valve guide 103 and a valve member that includes a valve body 33 connected to a valve stem 104 connecting the valve body 33 to the valve guide 103. A valve spring 31 can be present in a bore 66 of the housing 65. The valve body contact surface 69 and the corresponding contact surface of the valve body are shown as substantially linear, tapering outward to form a frusto-conical shape. However, any suitable complementary shapes may be used. For example, the valve body contact surface 69 and the corresponding contact surface of the valve body can have a frusto-spherical shape.

The valve 101 operates by the valve member translating in the valve guide to move the valve member between a closed configuration and an open configuration. In the closed configuration, the valve body 33 contacts the valve body contact surface 69 of the valve seat 68 to prevent fluid flow through the valve assembly 100. In the open configuration, the valve body 33 does not contact the valve seat 68 to allow fluid flow through the valve assembly 100.

On the suction stroke the valve 101 will move to the open position rapidly and return rapidly to the closed position on the discharge stroke. The valve 101 will experience very high forces under the pressure sealing and the rapid motion of the valve 101. Given that there is a clearance between the valve stem 104 and the valve guide 103, the valve 101 may not be properly aligned and will tilt upon opening as shown in FIG. 4 (e.g., the valve 101 is in the open configuration as the valve body 33 is not in contact with the valve body contact surface 69). Due to the speed at which a valve 101 returns during pressure sealing, it may not adequately re-center, causing the valve 101 to load at an angle 32 relative to the central axis 17. This undesirable angular loading can cause damage to the horizontal valve assembly 100 such as, for example, causing the valve stem 104 to shear or fatigue and fail.

As depicted in FIG. 5A, illustrates a schematic of the valve assembly of FIG. 4, the valve member allows for correction of undesirable angular loading by being moveable during operation such that the orientation of the valve body 33 relative to the valve seat 68 is adjustable. To allow the orientation of the valve body 33 to adjust, the valve body 33 is connected to the valve stem 104 by a ball joint connection 35 that allows the valve body 33 to pivot relative to the valve stem 104. With the valve member moveable, the valve member can alleviate the undesirable angular loading on the valve assembly 100, thus relieving unwanted stress, decreasing fatigue experienced by, and increasing the operational life of the valve assembly 100.

FIG. 5B illustrates a schematic of the valve assembly of FIG. 4 having an obstruction such as a particulate 74 captured between the valve body 33 and the valve seat 68 during closing thereof. Should a particulate 74 be captured, similar undesirable angular loading could be experienced by the valve assembly 100. In addition, if the obstruction is large enough, a valve member that is not moveable may not contact the valve seat 68 at all, decreasing the effectiveness of the valve. However, with the valve member being moveable, the orientation of the valve body 33 adjusts relative to the valve seat, thus relieving unwanted stress, decreasing fatigue experienced by, and increasing the operational life of the valve assembly 100. Additionally, at least a portion of the valve body 33 may be adjustable to be able to contact the valve seat 68. While potentially not forming a full seal, the moveable valve member is able to block more flow through the valve assembly 100 than if the valve member were not moveable.

FIG. 6 illustrates another embodiment of the valve assembly 150, although only the valve member with valve body 33 and valve stem 104 are shown. It is to be appreciated that the other components of the valve assembly 150 include the parts of valve assembly 100. Unlike the valve assembly 100, the valve member in the valve assembly is moveable by the valve stem 104 being flexible enough to move by bending the valve stem 104 in operation. With the connection between the valve body 33 and the valve stem 104 being rigid, bending the valve stem 104 allows the valve member to be moveable. With the valve member moveable, the valve member can alleviate the undesirable angular loading on the valve assembly 150, thus relieving unwanted stress, decreasing fatigue experienced by, and increasing the operational life of the valve assembly 150. Alternatively, in addition to the valve stem 104 being flexible, the connection between the valve body 33 and the valve stem 104 may be a ball joint as described in FIGS. 5A and 5B, allowing for even more movement of the valve member.

Also disclosed herein are a method of servicing a wellbore and a wellbore servicing system 200 comprising a pump of this disclosure. An embodiment of a wellbore servicing system 200 and a method of servicing a wellbore via the wellbore servicing system 200 will now be described with reference to FIG. 7, which is a schematic representation of an embodiment of a wellbore servicing system 200, according to embodiments of this disclosure.

A method of servicing a wellbore 224 according to this disclosure comprises: fluidly coupling a pump 10 to a source of a wellbore servicing fluid and to the wellbore 224; and communicating wellbore servicing fluid into a formation in fluid communication with the wellbore 224 via the pump 10.

It will be appreciated that the wellbore servicing system 200 disclosed herein can be used for any purpose. In embodiments, the wellbore servicing system 200 may be used to service a wellbore 224 that penetrates a subterranean formation by pumping a wellbore servicing fluid into the wellbore and/or subterranean formation. As used herein, a “wellbore servicing fluid” or “servicing fluid” refers to a fluid used to drill, complete, work over, fracture, repair, or in any way prepare a well bore for the recovery of materials residing in a subterranean formation penetrated by the well bore. It is to be understood that “subterranean formation” encompasses both areas below exposed earth and areas below earth covered by water such as ocean or fresh water. Examples of servicing fluids suitable for use as the wellbore servicing fluid, the another wellbore servicing fluid, or both include, but are not limited to, cementitious fluids (e.g., cement slurries), drilling fluids or muds, spacer fluids, fracturing fluids or completion fluids, and gravel pack fluids, remedial fluids, perforating fluids, diverter fluids, sealants, drilling fluids, completion fluids, gelation fluids, polymeric fluids, aqueous fluids, oleaginous fluids, etc.

In embodiments, the wellbore servicing system 200 comprises one or more pumps 10 operable to perform oilfield and/or well servicing operations. Such operations may include, but are not limited to, drilling operations, fracturing operations, perforating operations, fluid loss operations, primary cementing operations, secondary or remedial cementing operations, or any combination of operations thereof. Although a wellbore servicing system is illustrated, skilled artisans will readily appreciate that the pump 10 disclosed herein may be employed in any suitable operation.

In embodiments, the wellbore servicing system 200 may be a system such as a fracturing spread for fracturing wells in a hydrocarbon-containing reservoir. In fracturing operations, wellbore servicing fluids, such as particle laden fluids, are pumped at high-pressure into a wellbore. The particle laden fluids may then be introduced into a portion of a subterranean formation at a sufficient pressure and velocity to cut a casing and/or create perforation tunnels and fractures within the subterranean formation. Proppants, such as grains of sand, are mixed with the wellbore servicing fluid to keep the fractures open so that hydrocarbons may be produced from the subterranean formation and flow into the wellbore. Hydraulic fracturing may desirably create high-conductivity fluid communication between the wellbore and the subterranean formation.

The wellbore servicing system 200 comprises a blender 202 that is coupled to a wellbore services manifold trailer 204 via flowline 206. As used herein, the term “wellbore services manifold trailer” includes a truck and/or trailer comprising one or more manifolds for receiving, organizing, and/or distributing wellbore servicing fluids during wellbore servicing operations. In this embodiment, the wellbore services manifold trailer 204 is coupled to six positive displacement pumps (e.g., such as pump 10 that may be mounted to a trailer and transported to the wellsite via a semi-tractor) via outlet flowlines 208 and inlet flowlines 210. In alternative embodiments, however, there may be more or less pumps used in a wellbore servicing operation. Outlet flowlines 208 are outlet lines from the wellbore services manifold trailer 204 that supply fluid to the pumps 10. Inlet flowlines 210 are inlet lines from the pumps 10 that supply fluid to the wellbore services manifold trailer 204.

The blender 202 mixes solid and fluid components to achieve a well-blended wellbore servicing fluid. As depicted, sand or proppant 212, water 214, and additives 216 are fed into the blender 202 via feedlines 218, 220, and 222, respectively.

In embodiments, the pump(s) 10 (e.g., pump(s) 10 and/or maintained pump(s) 10) pressurize the wellbore servicing fluid to a pressure suitable for delivery into a wellbore 224 or wellhead. For example, the pumps 10 may increase the pressure of the wellbore servicing fluid (e.g., the wellbore servicing fluid and/or the another wellbore servicing fluid) to a pressure of greater than or equal to about 3,000 psi (21 MPa), 5,000 psi (34 MPa), 10,000 psi (69 MPa), 20,000 psi (138 MPa), 30,000 psi (207 MPa), 40,000 psi (276 MPa), or 50,000 psi (345 MPa), or higher.

From the pumps 10, the wellbore servicing fluid may reenter the wellbore services manifold trailer 204 via inlet flowlines 210 and be combined so that the wellbore servicing fluid may have a total fluid flow rate that exits from the wellbore services manifold trailer 204 through flowline 226 to the flow connector wellbore 1128 of between about 1 bbl/min (0.003 m³/sec) to about 200 bbl/min (0.53 m³/sec), alternatively from between about 50 bbl/min (0.13 m³/sec) to about 150 bbl/min (0.40 m³/sec), alternatively about 100 bbl/min (0.26 m³/sec). In embodiments, each of one or more pumps 10 discharge wellbore servicing fluid at a fluid flow rate of between about 1 bbl/min (0.003 m³/sec) to about 200 bbl/min (0.53 m³/sec), alternatively from between about 50 bbl/min (0.13 m³/sec) to about 150 bbl/min (0.40 m³/sec), alternatively about 100 bbl/min (0.26 m³/sec). In embodiments, each of one or more pumps 10 discharge wellbore servicing fluid at a volumetric flow rate of greater than or equal to about 3 bbl/min (0.01 m³/sec), 10 bbl/min (0.03 m³/sec), or 20 bbl/min (0.05 m³/sec), or in a range of from about 3 bbl/min (0.01 m³/sec) to about 20 bbl/min (0.05 m³/sec), from about 10 bbl/min (0.03 m³/sec) to about 20 bbl/min (0.05 m³/sec), or from about 5 bbl/min (0.01 m³/sec) to about 20 bbl/min (0.05 m³/sec).

Also disclosed herein are methods for servicing a wellbore (e.g., wellbore 224). Without limitation, servicing the wellbore may include: positioning the wellbore servicing composition in the wellbore 224 (e.g., via one or more pumps 10 as described herein) to isolate the subterranean formation from a portion of the wellbore; to support a conduit in the wellbore; to plug a void or crack in the conduit; to plug a void or crack in a cement sheath disposed in an annulus of the wellbore; to plug a perforation; to plug an opening between the cement sheath and the conduit; to prevent the loss of aqueous or nonaqueous drilling fluids into loss circulation zones such as a void, vugular zone, or fracture; to plug a well for abandonment purposes; to divert treatment fluids; and/or to seal an annulus between the wellbore and an expandable pipe or pipe string. In other embodiments, the wellbore servicing systems and methods may be employed in well completion operations such as primary and secondary cementing operation to isolate the subterranean formation from a different portion of the wellbore.

In embodiments, a wellbore servicing method may comprise transporting a positive displacement pump (e.g., pump 10) to a site for performing a servicing operation. Additionally, or alternatively, one or more pumps may be situated on a suitable structural support. Non-limiting examples of a suitable structural support or supports include a trailer, truck, skid, barge, or combinations thereof. In embodiments, a motor or other power source for a pump may be situated on a common structural support.

In embodiments, a wellbore servicing method may comprise providing a source for a wellbore servicing fluid. As described above, the wellbore servicing fluid may comprise any suitable fluid or combinations of fluid as may be appropriate based upon the servicing operation being performed. Non-limiting examples of suitable wellbore servicing fluid include a fracturing fluid (e.g., a particle laden fluid, as described herein), a perforating fluid, a cementitious fluid, a sealant, a remedial fluid, a drilling fluid (e.g., mud), a spacer fluid, a gelation fluid, a polymeric fluid, an aqueous fluid, an oleaginous fluid, an emulsion, various other wellbore servicing fluid as will be appreciated by one of skill in the art with the aid of this disclosure, and combinations thereof. The wellbore servicing fluid can comprise large particles selected from diverting agents, circulation loss materials, drill cuttings, or a combination thereof, for example, wherein the large particulates have a diameter of greater than or equal to about 0.07 inch (1.8 mm), 0.12 inch (3.0 mm), or 0.17 inch (4.3 mm). The wellbore servicing fluid may be prepared on-site (e.g., via the operation of one or more blenders) or, alternatively, transported to the site of the servicing operation.

In embodiments, a wellbore servicing method may comprise fluidly coupling a pump 10 to the wellbore servicing fluid source. As such, wellbore servicing fluid may be drawn into and emitted from the pump 10. Additionally, or alternatively, a portion of a wellbore servicing fluid placed in a wellbore 224 may be recycled, i.e., mixed with the water stream obtained from a water source and treated in fluid treatment system. Furthermore, a wellbore servicing method may comprise conveying the wellbore servicing fluid from its source to the wellbore via the operation of the pump 10 disclosed herein.

Those of ordinary skill in the art will readily appreciate various benefits that may be realized by the present disclosure. Slurries with large particles create valve sealing issues making them difficult to pump. A valve assembly 100 as disclosed herein can be utilized to successfully pump these large particles, while minimizing an amount of seal lost and damage cause by obstructions such as particles between the valve body and the valve seat.

Examples of the above embodiments include:

Example 1. A pump assembly, comprising: a power end; a fluid end; and a valve assembly located in the fluid end. The valve assembly comprising: a valve seat; and a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

Example 2. The assembly of Example 1, wherein the valve member is translatable in a horizontal orientation during operation to seal and unseal against the valve seat.

Example 3. The assembly of Example 1, wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

Example 4. The assembly of Example 3, wherein the valve body is connected to the valve stem by a ball joint.

Example 5. The assembly of Example 1, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

Example 6. The assembly of Example 1, wherein the valve member is engageable with the valve seat to form a seal around the valve seat in multiple orientations.

Example 7. The assembly of Example 1, wherein the valve member is moveable during operation in response to an obstruction between the valve body and the valve seat.

Example 8. The assembly of Example 1, wherein the valve member is movable during operation by at least one of pivoting the valve body relative to the valve stem or by bending the valve stem.

Example 9. A method of servicing a wellbore, comprising: fluidly coupling a pump assembly to a source of a wellbore servicing fluid and to the wellbore; and communicating wellbore servicing fluid into the wellbore by operating the pump assembly. Wherein the pump assembly comprises: a power end; a fluid end; and a valve assembly located in the fluid end and comprising a valve seat and a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

Example 10. The method of Example 9, further comprising translating the valve member in a horizontal orientation during operation to seal and unseal against the valve seat.

Example 11. The method of Example 9, further comprising wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

Example 12. The assembly of Example 11, wherein the valve body is connected to the valve stem by a ball joint.

Example 13. The method of Example 9, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

Example 14. The method of Example 9, wherein the valve member is engageable with the valve seat to form a seal around the valve seat in multiple orientations.

Example 15. The method of Example 9, further comprising moving the valve member during operation in response to an obstruction between the valve body and the valve seat.

Example 16. A valve assembly comprising: a valve seat; and a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

Example 17. The assembly of Example 16, wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

Example 18. The assembly of Example 16, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

Example 19. The assembly of Example 16, wherein the valve member is moveable during operation in response to an obstruction between the valve body and the valve seat.

Example 20. The assembly of Example 16, wherein the valve member is movable during operation by at least one of pivoting the valve body relative to the valve stem or by bending the valve stem.

Certain terms are used throughout the description and claims to refer to particular features or components. As one skilled in the art will appreciate, different persons may refer to the same feature or component by different names. This document does not intend to distinguish between components or features that differ in name but not function.

Unless otherwise indicated, all numbers expressing quantities are to be understood as being modified in all instances by the term “about” or “approximately”. Accordingly, unless indicated to the contrary, the numerical parameters are approximations that may vary depending upon the desired properties of the present disclosure.

The embodiments disclosed should not be interpreted, or otherwise used, as limiting the scope of the disclosure, including the claims. It is to be fully recognized that the different teachings of the embodiments discussed may be employed separately or in any suitable combination to produce desired results. In addition, one skilled in the art will understand that the description has broad application, and the discussion of any embodiment is meant only to be exemplary of that embodiment, and not intended to suggest that the scope of the disclosure, including the claims, is limited to that embodiment.

Claims

1. A pump assembly, comprising:

a power end;

a fluid end; and

a valve assembly located in the fluid end and comprising: a valve seat; and a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

2. The assembly of claim 1, wherein the valve member is translatable in a horizontal orientation during operation to seal and unseal against the valve seat.

3. The assembly of claim 1, wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

4. The assembly of claim 3, wherein the valve body is connected to the valve stem by a ball joint.

5. The assembly of claim 1, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

6. The assembly of claim 1, wherein the valve member is engageable with the valve seat to form a seal around the valve seat in multiple orientations.

7. The assembly of claim 1, wherein the valve member is moveable during operation in response to an obstruction between the valve body and the valve seat.

8. The assembly of claim 1, wherein the valve member is movable during operation by at least one of pivoting the valve body relative to the valve stem or by bending the valve stem.

9. A method of servicing a wellbore, comprising:

fluidly coupling a pump assembly to a source of a wellbore servicing fluid and to the wellbore; and

communicating wellbore servicing fluid into the wellbore by operating the pump assembly;

wherein the pump assembly comprises: a power end; a fluid end; and a valve assembly located in the fluid end and comprising a valve seat and a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

10. The method of claim 9, further comprising translating the valve member in a horizontal orientation during operation to seal and unseal against the valve seat.

11. The method of claim 9, further comprising wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

12. The assembly of claim 11, wherein the valve body is connected to the valve stem by a ball joint.

13. The method of claim 9, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

14. The method of claim 9, wherein the valve member is engageable with the valve seat to form a seal around the valve seat in multiple orientations.

15. The method of claim 9, further comprising moving the valve member during operation in response to an obstruction between the valve body and the valve seat.

16. A valve assembly comprising:

a valve seat; and

a valve member comprising a valve body connected to a valve stem and reciprocatable during operation to engage the valve seat, wherein the valve member is moveable during operation such that the orientation of the valve body relative to the valve seat is adjustable.

17. The assembly of claim 16, wherein the valve member is movable during operation by pivoting the valve body relative to the valve stem.

18. The assembly of claim 16, wherein the valve body is rigidly connected to the valve stem and the valve member is movable during operation by bending the valve stem.

19. The assembly of claim 16, wherein the valve member is moveable during operation in response to an obstruction between the valve body and the valve seat.

20. The assembly of claim 16, wherein the valve member is movable during operation by at least one of pivoting the valve body relative to the valve stem or by bending the valve stem.