Abstract: A centralizer sub, and system, for enhanced access to subterranean zones from the surface as used in oil and gas wellbore installations to center a pipe or casing within a wellbore or previous casing string during run-in, installation, or cementing procedures. In under-reamed applications, casing strings and centralizers pass through a smaller casing string before opening up to a larger hole where repeated compressions and decompressions of bow strings of centralizers can compromise integrity and reliability. A centralizer sub, system, and method reduces and controls insertion and running forces to preserve centralizer integrity and down-bore surfaces and equipment.

Abstract: An apparatus is provided for spinning a tubular that includes a frame having a first arm and a second arm outwardly extending from a central region where each arm includes a roller. The frame also includes a center roller coupled to the central region of the frame. The frame is also capable of functioning as a clamping mechanism by providing at least one of the rollers on the frame with an internal gear mechanism for increasing the amount of torque that can be applied to a tubular.

Abstract: A centrifuge, including a bowl having a composite material, a screw conveyor rotatably mounted within the bowl, and a feed pipe mounted within the screw conveyor for feeding a drilling mud through a feed port in a wall of the screw conveyor to an annular space between the bowl and the wall of the screw conveyor. Also, a method of replacing a centrifuge component, including removing the centrifuge component and installing a new centrifuge component, where the centrifuge components include a bowl and a screw conveyor rotatably mounted within the bowl, and where the new centrifuge component includes a composite material.

Abstract: A dual deck vibratory separator is provided having an improved mud flow path that provides for higher flow capacities overall is provided. The shaker has a lighter basket possessing a full-size upper deck extending across the width and length of the basket. Operational efficiency and operability is improved with flow deflecting and energy absorbing plates disposed intermediate along the mud flow path. The screen assemblies are secured with improved wedges, improved wedge guides, screen cushions, and cushion stops on transverse structure members for longer screen and slide life. An optional vacuum tray on the finishing trays further enhances recovery of drilling fluid. Maintenance, when required, is improved through ease of upper screen removal for inspection and access. Inclined side windows on each side of the basket may provide cleaning and viewing access.

Abstract: A method is provided for determining a discharge coefficient of a managed pressure drilling choke/valve as a function of valve opening position. The method comprises: a flow of air/gas through the choke/valve; measuring a velocity of the air/gas flow at an inlet of the choke/valve; and measuring a pressure drop of the air/gas flow across the choke/valve.

Abstract: A method for modifying a return fluid in a wellbore comprising disposing at least one valve along a drill pipe section of a drill string in the wellbore. At least one parameter of interest is determined at at least one location along the wellbore. At least one valve is controllably actuated to discharge at least a portion of at least one fluid from inside the drill string to an annulus in the wellbore to modify a local property of the return fluid in the annulus based at least in part on the measured parameter of interest.

Abstract: A flow diverter is provided having a first sub member, a second sub member, a third sub member connected in series and a piston, a spring, and a sleeve member. The sleeve member is removeably disposed within the second sub member. The spring concentrically surrounds at least a portion of the piston and the spring are slidably disposed within the first sub member with the piston further slidably disposed within the second sub member and at least a portion of the third sub member. A drilling fluid having a first predetermined pressure passes through the flow diverter. The drilling fluid having a second predetermined pressure moves the piston until at least a portion of the drilling fluid passes through bypass ports formed in the piston, sleeve member, and second sub member and out of the flow diverter, thus controlling the pressure of the drilling fluid.

Abstract: A valve assembly for drilling systems comprising a bidirectional valve (1) cooperating with a hydraulic clamping device (2) and being applied to a drilling machine for supplying a drilling fluid in two discrete directions, the valve assembly comprising a valve outer body adapted to be arranged between drilling rods while allowing said rod to be exchanged while keeping the mud continuously circulating.

Abstract: An annular barrier has a tubular part, and a downhole expandable tubular to be expanded in an annulus downhole from a first outer diameter to a second outer diameter to abut against an inner face of a casing or borehole. The downhole expandable tubular has a first end section, a second end section and an intermediate section between the first end section and the second end section, the downhole expandable tubular surrounding the tubular part. Each end section of the downhole expandable tubular is connected with the tubular part and extends along a longitudinal axis, and defines an annular barrier space between the tubular part and the downhole expandable tubular. The tubular is made from one metal tubular blank of one metal material, the metal material of the end sections having a higher yield strength than the metal material of the intermediate section.

Abstract: A reducing support ring for a bridge plug and a bridge plug for sealing or packing boreholes or wells. The reducing support ring for the bridge plug includes a ring-shaped body with a setting surface provided on a circumferential outer wall or end face of the ring-shaped body. Deformation of the ring-shaped body under an axial compression force allows the setting surface of the ring-shaped body to be abutted against and positioned on an inner wall of a sleeve where a bridge plug is located and to form a surface contact-type sealed connection with the inner wall of the sleeve. The bridge plug includes the reducing support ring. The reducing support ring and the bridge plug improve the plugging effect and anchoring performance of the bridge plug and the convenience of construction.

Abstract: A wellbore isolation device includes a wedge member that defines an outer surface and a barrel seal having a cylindrical body that provides an inner radial surface and an outer radial surface. The inner radial surface is engageable with the outer surface of the wedge member. The barrel seal further includes a plurality of longitudinally extending grooves defined through the body in an alternating configuration at opposing ends of the body. A raised lip protrudes radially from the outer radial surface and circuitously extends about a circumference of the body. A plurality of slip buttons is positioned in a corresponding plurality of holes defined in the outer radial surface of the body. At least one of the wedge member and the barrel seal is made of a degradable material that degrades when exposed to a wellbore environment.

Abstract: Provided are systems and methods for thru-tubing completion including a sub-surface completion unit (SCU) system including a SCU wireless transceiver for communicating with a surface control system of a well by way of wireless communication with a down-hole wireless transceiver disposed in a wellbore of the well, one or more SCU anchoring seals having an un-deployed position (enabling the SCU to pass through production tubing disposed in the wellbore of the well) and a deployed position (to seal against a wall of the target zone of the open-hole portion of the wellbore to provide zonal isolation between adjacent regions in the wellbore) and one or more SCU centralizers having an un-deployed position (enabling the SCU to pass through the production tubing disposed in the wellbore of the well) and a deployed position (to position the SCU in the target zone of the open-hole portion of the wellbore).

Abstract: Systems and methods that utilize radiation to set cementitious compositions can be used to set a pipe or casing in a wellbore. The systems and methods involve connecting a radiation tool to the top plug of a two-plug system used to place the cementitious composition in the annulus between the pipe and the wellbore. The systems and methods provide for radiating the cementitious composition as it is introduced into the wellbore and as the radiation tool is retrieved from the pipe.

Abstract: A production assembly comprising a valve, a flow meter and a choke as part of a branch of a production tree.

Abstract: A connector has an upper end for connection into the upper part of a drill string. The connector has an outer member that slides over an inner member, the outer member and the inner member having a locked position and an unlocked position. A latch assembly in the connector places the inner member and the outer member in the unlocked position in response to hydraulic fluid pressure applied to the connector. A ball valve assembly has an upper portion for connection with a lower end of the connector and a lower portion for connection into a lower part of the drill string. A ball valve element actuator in the ball valve assembly rotates a ball valve element to the closed position in response to the upper portion of the ball valve assembly moving downward relative to the lower portion of the ball valve assembly.

Abstract: A ball drop two stage valve includes a tubular having a body defined by an outer surface and an inner surface that defines a fluid flow path. A stimulation port is formed in the body. The stimulation port extends through the body. At least one flow port is formed in the body longitudinally spaced from the stimulation port. The at least one flow port extends through the body. A first sleeve is slidingly positioned along the fluid flow path in the body. The first sleeve includes a first ball seat and is selectively positionable to selectively block flow through the stimulation port. A second sleeve is slidingly positioned along the fluid flow path in the body. The second sleeve includes a second ball seat and is selectively positionable to selectively block flow through the flow port and the stimulation port.

Abstract: A multi-function diverter tool is disclosed that allows positive-indication opening and closing of the tool in a downhole environment. The tool includes a first sleeve adapted to open outlet ports in the exterior surface of the tool body. The tool includes a second sleeve which is movable with respect to the first sleeve and is adapted to close the outlet ports when moved from an initial position to a second position.

Abstract: A system includes a manifold and a shared valve actuation system that is operatively coupled to the manifold at a single location. The manifold is comprised of a block with at least one drilled header hole formed within the block, a plurality of drilled flow inlet holes formed within the block, wherein the number of drilled flow inlet holes corresponds to the number of external flow lines that supply fluid to the manifold, and a plurality of isolation valves coupled to the block, the valve element for each of the isolation valves positioned within the block. The system includes an arm that rotates about an axis that is normal to an upper surface of the block of the manifold, a plurality of structural elements that are coupled to one another via rotary joints, and a tool that engages and actuates one of the plurality of isolation valves.

Abstract: A downhole assembly can include plates in series along a length of a tubular member. Plates can include particulate-blocking areas and pass-through areas. A pass-through area of a plate can be angularly offset from a pass-through area of another plate in the series. The plates may be angled so that particulate carried by fluid from a wellbore may be trapped by particulate-blocking areas that may be tilted away from the fluid source.

Abstract: Some embodiments are directed to a shaped charge liner including an apex end and a base end and defining a main liner axis that passes through the apex and base ends, the liner being rotationally symmetric about the main liner axis wherein the liner has discrete rotational symmetry about the main liner axis.

Abstract: Methods including introducing a downhole orienting tool into a wellbore comprising: a mandrel having a top end and a bottom end, and rotatable about a longitudinal central axis, a sensor module comprising a motor and a sensor, the sensor module disposed on the mandrel and configured to selectively interfere with the movement of the mandrel along the central axis and actively rotate the mandrel by orienting the sensor to a reference point, and a wellbore isolation device comprising an orientation key directionally aligned with the sensor, the wellbore isolation device removably coupled to the bottom end of the mandrel and configured to rotate about the central axis with the mandrel; actively rotating the mandrel and the wellbore isolation device until the sensor is oriented to the reference point, such that the orientation key is also oriented to the reference point; and setting the wellbore isolation device in the wellbore.

Abstract: Systems, methods, and computer-readable media for modeling slug flow. The method includes receiving a fluid flow model comprising a representation of one or more conduits and a multiphase fluid flow therein, and determining a slug birth rate in the multiphase fluid flow. The slug birth rate is determined based at least partially on a difference between a slug front velocity and a slug tail velocity. The method also includes initiating a slug in the fluid flow model based at least partially on the slug birth rate, and displaying data representative of the slug flow in the model.

Abstract: The invention relates to injecting steam into crude oil for several benefits, primarily of which is to remove salt by transferring the salt into the condensed water from the steam. Steam transfers salt via a different transfer mechanism and therefore doesn't require the high shear mixing of conventional water injection systems. As such, steam injection through a variety of procedures, is more efficient at gathering salt into water that itself is easier to remove from the crude oil.

Abstract: A seismic wave generating tool, such as a spark gap, of an electric arc generation device includes an upper part and a lower part defining a discharge chamber between them, at least one retaining arm connecting the upper part to the lower part, first and second electrodes respectively associated with the upper and lower parts and arranged in the discharge chamber. The retaining arm comprises an electrically insulating part facing the electrodes. The tool includes a first deployable device implementing a current return and connecting the upper part to the lower part. The first deployable device is configured to be in a retracted state and in a deployed state in which it is at a distance from the discharge chamber.

Abstract: A manifold trailer and pairing system are disclosed. Methods may include pressurizing a low pressure manifold of a manifold trailer, the low pressure manifold having a first low pressure valve and a second low pressure valve; opening a selected low pressure valve of the first and second low pressure valves; detecting a first pressure on a selected pump, via a first pressure sensor, indicative of a fluid communication between the selected low pressure valve and the selected pump; detecting a second pressure associated with a main line or a wellhead; comparing the first pressure on the selected pump to the second pressure associated with the main line or the wellhead to derive a pressure differential; and engaging the selected pump if the pressure differential is within a given threshold.

Abstract: A method and apparatus for estimating the instantaneous rotational speed of a bottom hole assembly at the lower end of a drill string. In one embodiment, a method includes driving the drill string by a drilling mechanism at the upper end of the drill string. A fundamental frequency of stick-slip oscillations suffered by the drill string is estimated. Variations in a drive torque of the drilling mechanism are determined. Known torsional compliance of the drill string is combined with the variations in the drive torque. An output signal representing the instantaneous rotational speed is provided.

Abstract: In drilling into a subterranean formation, several factors influence the rate of penetration, including, but not limited to, the type of formation being drilled, the weight on bit, and the rotational speed of the drill bit. Disclosed are a system and method for controlling the rotational speed of a drill bit based on regulation of fluid flow to the motor driving the bit, while maintaining at least a minimum flow of fluid to the annulus to clear debris from downhole during drilling. Regulation of fluid flow to the motor and to the annulus may be accomplished utilizing a flow diverter configured to adjust a flow ratio depending on drilling conditions in order to maximize efficiency of the motor downhole during drilling.

Abstract: An automated slide drilling system (ASDS) may be used with a drilling rig system to control slide drilling. The ASDS may autonomously control slide drilling without user input during the slide drilling. The ASDS may further support a transition from rotary drilling to slide drilling to rotary drilling without user input during the transitions. The ASDS may also support user input and user notifications for various steps to enable manual or semi-manual control of slide drilling by a driller or an operator.

Abstract: A method of model-based acoustic measurements for a wellbore comprises creating an interpretation chart of acoustic measurements by a downhole tool in a wellbore using a numerical modeling and performing an evaluation with respect to the wellbore based on the interpretation chart.

Abstract: A method includes deploying an electromagnetic (EM) defect detection tool in a downhole environment having a plurality of tubular strings with different diameters. The method also includes receiving raw measurements collected by the EM defect detection tool. The method also includes deconvolving the raw measurements with another input to obtain deconvolved raw measurements. The method also includes using the deconvolved raw measurements to determine a defect in at least one of the plurality of tubular strings. The method also includes performing, by a device, an operation in response to the determined defect.

Abstract: Apparatus and methods for estimating an azimuth of at least part of a bottomhole assembly (BHA) in a borehole intersecting an earth formation, the BHA comprising magnetic material. Methods include conveying the BHA into the borehole; using a first sensor disposed on the BHA to produce a first measurement of a component of a magnetic field at a first borehole depth; estimating the axial component at the first borehole depth in dependence upon the first measurement; estimating an azimuth of at least a part of the BHA at the first borehole depth using the axial component; and controlling drilling operations with the BHA in dependence upon the azimuth. The magnetic field includes an axial component and a plurality of non-axial components unaligned with the axial component. The magnetic field is affected by the magnetic material and the first measurement is representative of at least one non-axial component of the plurality.

Abstract: A method for determining a rotational position of a rotor in a fluid pressure pulse generator of a downhole telemetry tool comprises: for at least one rotational position of the rotor, determining an expected pressure of a drilling fluid at the fluid pressure pulse generator that corresponds to the at least one rotational position; forming a rotor position map of rotor rotational positions and corresponding expected drilling fluid pressures from the at least one rotational position of the rotor and the corresponding determined expected pressure; measuring a pressure of the drilling fluid at the fluid pressure pulse generator, and determining the rotational position of the rotor at the measured pressure by associating the measured pressure to an expected pressure and corresponding rotor rotational position in the rotor position map.

Abstract: A system and method is provided for enhancing hydrocarbon production. The method and system involve geochemistry analysis and include multiply substituted isotopologue and position specific isotope geochemistry for at least one hydrocarbon compound of interest associated with free gas and sorbed gas. The method and system involve using clumped isotope and position specific isotope signatures to enhance monitoring of well and stimulation performance.

Abstract: A formation sampling method includes disposing a downhole tool comprising a packer and an expandable probe within a wellbore. The method also includes performing pressure transient testing by setting the expandable packer and the probe to engage a wall of the wellbore and measuring a pressure response at the expandable packer and the probe while withdrawing formation fluid into the downhole tool through the expandable packer. The method further includes monitoring a contamination level of the formation fluid during the pressure transient testing, and performing formation sampling with the probe in response to determining that the monitored contamination level meets a predetermined threshold.

Abstract: A rock excavating device includes a shaft and a cutting element. The shaft includes a first portion and a second portion connected to an end of the first portion. The first portion is rotatable about a first axis. The second portion extends along a second axis that is oblique with respect to the first axis. The cutting element includes a cutting edge. The cutting element is supported on the second portion and rotatable about the second axis. Rotation of the first portion of the shaft about the first axis changes the orientation of the second axis and the cutting element.

Abstract: A method for using a composition for use as rock dust in an underground mine is disclosed. The composition includes a fine, wet ground inorganic particulate material treated with at least one hydrophobic treatment, and a coarse, untreated, dry ground inorganic particulate material. Also disclosed is a composition including coal dust and mine rock dust including a fine, wet ground inorganic particulate material treated with at least one hydrophobic treatment, and a coarse, untreated, dry ground inorganic particulate material. The amount of mine rock dust may be sufficient to render the coal dust explosively inert according to at least one of a 20-L explosibility test or an ASTM E1515 explosibility test. The fine, wet ground inorganic particulate material may be calcium carbonate. The coarse, untreated inorganic particulate material may be calcium carbonate. The fatty acid may be stearic acid.

Abstract: The invention relates to a pump device for pumping a liquid having a hydraulics housing (12), in which a pump ring (14), a pump ring support (16), and an eccentric (18) are accommodated, which eccentric is to be driven by a shaft (20), which defines an axial and a radial direction, wherein the pump ring (14) has a first axial side (45) and a second axial side (47), wherein the hydraulics housing (12) comprises an annular portion (22) and a first and a second lateral section (24, 26), wherein the two lateral sections (24, 26) are arranged opposite each other, wherein the pump ring (14) is arranged, at least in some portions, between the two lateral sections (24, 26) of the hydraulics housing (12), and wherein on the first axial side (45) and the second axial side (47), the profile of the pump ring (14) in each case follows a contour with an S-formed curve (32) with a convex section (34) and a concave section (36), wherein the convex section (34) lies further outwards in a radial direction of the shaft (20) in

Abstract: A pump device for pumping a liquid, has a hydraulics housing (12), in which a pump ring (14) with a contact surface (46), a pump ring support (16) and an eccentric (18), which can be driven by a shaft (20), are accommodated. The hydraulics housing (12) has an annular portion (22) and a first and a second lateral section (24, 26), the two lateral sections (24, 26) being arranged opposite each other. The pump ring (14) is mounted between the two lateral sections (24, 26) of the hydraulics housing (12) at least in some portions. The profile of the contact surface (46) has a contour with a curvature that changes at least in portions, and specifically in such a way that the curvature increases at least in some portions towards the ends of the contact surface (46).

Abstract: A method of reducing stress concentration in a material subjected to a predominant stress in a direction parallel to an axial plane defined through an axis of a circular cylindrical hole in the material between a first material surface and a second material surface, the material having a material thickness defined between the first material surface and the second material surface, the method comprising: forming a first proximal recess in the first material surface on the axial plane having a depth less than the material thickness, the first proximal recess having an outer edge spaced a first proximal dimension in the axial plane from a first rim of the hole; and forming a second proximal recess in the second material surface on the axial plane having a depth less than the material thickness, the second proximal recess having an outer edge spaced a second proximal dimension in the axial plane from a second rim of the hole, wherein the first proximal dimension on the first material surface is diametrically oppo

Abstract: The invention relates to a steam turbine rotor wherein the inter blade region rotor surface, the feed region rotor surface, the piston region rotor surface and the stress relief groove rotor surface of the rotor are configured and arranged as steam exposed surfaces during normal operation of the steam turbine rotor. The steam turbine rotor has a thermal barrier coating on at least the piston region rotor surface.

Abstract: A gas turbine disk includes a rotor and a tie-bolt. The rotor includes a plurality of blades and a plurality of disks. The plurality of blades are disposed on outer circumferential surfaces of the plurality of disks. The tie-bolt is disposed along a center axis of the rotor and through a bore defined through hollow portions of the plurality of disks, so as to couple the plurality of disks to each other. A diameter of the bore is larger than a diameter of the tie-bolt. The plurality of disks respectively include a groove spaced from the bore in the circumferential direction of the bore, the groove being elongated in the axial direction of the bore such that cooling air flows through an internal space thereof.

Abstract: When cold and in the non-coated state, the aerodynamic profile is substantially identical to a nominal profile determined by the Cartesian coordinates X, Y, Zadim given in Table 1, in which the coordinate Zadim is the quotient D/H where D is the distance of the point under consideration from a first reference plane P0 situated at the base of the nominal profile, and H is the height of said profile measured from the first reference plane to a second reference plane P1. The measurements D and H are taken radially relative to the axis of the turbine, while the X coordinate is measured in the axial direction of the turbine.

Abstract: A rotor for a gas turbine engine includes a hub having an outer periphery, a first plurality of blades arranged on the outer periphery of the hub, and a second plurality of blades arranged on the outer periphery of the hub. The first plurality of blades is made of a first material and has a first elastic modulus over density ratio. The first plurality of blades has a first natural frequency. The second plurality of blades is made of a second material and has a second elastic modulus over density ratio. The second elastic modulus over density ratio is different from the first elastic modulus over density ratio. The second plurality of blades has a second natural frequency different from the first natural frequency. A method of fabricating a bladed rotor is also presented.

Abstract: A vane assembly for a gas turbine engine includes an inner diameter platform, an outer diameter platform, and an airfoil shaped vane spanning from the inner diameter platform to the outer diameter platform. The airfoil shaped vane includes an internal cooling passage having a first inlet at the inner diameter platform and a second inlet at the outer diameter platform. An outer diameter platform cover is disposed radially outward of the outer diameter platform, relative to a radius of an arc defined by an arc of the outer diameter platform. The outer diameter platform includes at least one coolant cover inlet hole, the at least one coolant cover inlet hole being aligned with a corresponding second inlet.

Abstract: A method for manufacturing a turbine engine blade (25) comprising a pressure side and a suction side separated from one another by an inner space for the circulation of cooling air, the blade (25) comprising a tip (S) with a closing wall (29) joining the pressure side and suction side walls in the region of this tip (S) in order to define a well shape, the closing wall including through-holes. The closing wall (29) obtained by moulding has a considerable nominal thickness with pits (36, 37) locally reducing this thickness at each through-hole in order to facilitate the removal by chemical etching of alumina rods defining the holes. Since the closing wall (29) thus has a large nominal thickness, it can then be machined in order to form raised patterns or complex shapes inside the well.

Abstract: A turbine airfoil (10) includes a flow displacement element (26A-B, 26A?-B?) positioned in an interior portion (11) of an airfoil body (12) between a pair of adjacent partition walls (24) and comprising a radially extending elongated main body (28). The main body (28) is spaced from the pressure and suction side walls (16, 18) and further spaced from one or both of the adjacent partition walls (24), whereby a first near wall passage (72) is defined between the main body (28) and the pressure side wall (16), a second near wall passage (74) is defined between the main body (28) and the pressure side wall (18) and a central channel (76) is defined between the main body (28) and a respective one of the adjacent partition walls (24). The central channel (76) is connected to the near wall passages (72, 74) along a radial extent.

Abstract: A turbine blade may comprise a pressure side wall and a suction side wall opposite the pressure side wall. A tip wall may extend between the pressure side wall and the suction side wall and may comprise a first opening. A first dimension of the first opening may be greater than a second dimension of the first opening. The first dimension may be oriented in a direction extending from a leading edge of the turbine blade toward a trailing edge of the turbine blade.

Abstract: A tip structure for a turbine blade comprises a tip surface of an airfoil that extends from a leading edge to a trailing edge and from a pressure side to a suction side of the airfoil. A suction side rail protrudes from the tip surface and comprises: a trailing portion extending flush with the suction side of the airfoil from an origination location at or near the trailing edge to an intermediate location on the suction side; and a leading portion extending from the intermediate location across the tip surface so as to create a suction side shelf region between the leading portion of the suction side rail and the suction side of the airfoil.

Abstract: A blade for a gas turbine engine. The blade having: a root; a platform located between the root and the blade, wherein the platform defines a cavity; a damper seal received in the cavity, the damper seal having a main body portion that extends along a major axis of the damper seal between a first end portion and an opposing second end portion of the damper seal, the first end portion and the second end portion each extend towards the root when the damper seal is located in the cavity and wherein the damper seal has a variable thickness along at least a portion of a minor axis of the damper seal that extends between opposite peripheral edges of the main body portion.

Abstract: A blade for a gas turbine engine is disclosed herein. The blade having: a root; a platform located between the root and the blade, wherein the platform defines a cavity; a damper restraint located at a peripheral edge of the platform, wherein the damper restraint is a raised feature extending along at least a portion of the peripheral edge of the platform.