Abstract: Methods and compositions are provided that relate to cementing operations. Methods and compositions that include a latex strength enhancer for enhancing the compressive strength of slag compositions.

Abstract: A positive displacement pump comprising a lubricant manifold comprising a first fluid pathway, a housing comprising a second fluid pathway in fluid communication with the first pathway, a crosshead slide within the housing and comprising a third fluid pathway in fluid communication with the second pathway; a crosshead configured to reciprocate within the crosshead slide, the crosshead comprising a fourth fluid pathway in fluid communication with the third pathway, the crosshead further comprising a wrist-pin having a fifth fluid pathway in fluid communication with the fourth pathway, a crankshaft within the housing, and a connecting rod disposed between the crosshead and the crankshaft and connected thereto, wherein the connecting rod comprises a sixth fluid pathway displaced from the connecting rod centerline and in fluid communication with the fifth pathway, and wherein the crankshaft end of the connecting rod comprises a seventh fluid pathway in fluid communication with the sixth pathway.

Abstract: Methods and compositions are provided that relate to weighted elastomers. The weighted elastomers may comprise an elastomer and a weighting agent attached to an outer surface of the elastomer. An embodiment includes a method of cementing that comprises providing a cement composition containing cement, water, and a weighted elastomer. In addition, the cement composition may be introduced into a subterranean formation and allowed to set therein.

Abstract: A composition comprises: a treatment fluid comprising a lost-circulation material, wherein the lost-circulation material comprises asphalt, and wherein the lost-circulation material has a median particle size in the range from about 0.001 millimeters to about 25.4 millimeters. According to another embodiment, the composition comprises: a treatment fluid comprising a lost-circulation material, wherein the lost-circulation material comprises asphalt, and wherein the median particle size and the concentration of the lost-circulation material is selected such that the treatment fluid has a sealing pressure of at least 30 psi (0.2 MPa). A method of eliminating or reducing lost circulation from a well comprises: introducing the treatment fluid into at least a portion of the well.

Abstract: Generally, the present invention provides drilling fluid additives for reducing or controlling lost circulation in a drilling operation. The additives comprises particles. The particles comprise one or more solids in association a wax or waxy substance. A drilling fluid comprising a drilling fluid additive of the invention is also provided, as well as a method and use of the drilling fluid additive in a drilling operation to reduce or control lost circulation. Methods for manufacturing the drilling fluid additives are also described.

Abstract: A system is provided that is conducive to multi-stage stimulation in a near-continuous fashion. That is, unlike conventional stimulation systems, embodiments herein may operate without the requirement of traditional plug-setting, perforating and fracturing interventions on a zone by zone basis for a cemented completion. Rather, the system is outfitted with frac sleeves that may be shifted open to expose the bore to the formation while simultaneously achieving a seal through a ball drop technique. Once more, this manner of operation is rendered practical by the sleeve being of a passable configuration such that cementing of the casing is not impeded.

Abstract: An internal completion string is anchored within a closed casing valve of a production liner in a wellbore. The internal completion string comprises a packer and a shifting tool. The production liner comprises a casing valve having a port and a moveable member. The annulus defined between the production liner and the internal completion string is sealed, and the shifting tool is remotely operated to move the moveable member away from the port, thereby opening the casing valve.

Abstract: A method of servicing a wellbore comprising preparing a composition comprising a non-aqueous carrier fluid, an oil-wetting surfactant, a water-imbibition enhancing surfactant, and a cementitious material; placing the composition within a detrimentally permeable zone; and contacting the composition with water. A method of servicing a wellbore comprising placing a composition comprising a non-aqueous carrier fluid, an oil-wetting surfactant, a water-imbibition enhancing surfactant, and a cementitious material into the wellbore wherein the wellbore comprises hydrocarbon-producing zones and water-producing zones and wherein the composition enters the water-producing zone and forms a solid mass that obstructs the flow of water in the water-producing zone.

Abstract: A method and a device are for plugging a submerged well in which a wellhead valve is arranged at the seabed.

Abstract: A configurable hydraulic system facilitates a variety of oilfield cementing and other oilfield or related applications. The system employs a plurality of prime movers to drive a plurality of loads. The plurality of prime movers and loads are coupled with a configurable hydraulic system that maintains a separate, sealed hydraulic system associated with each prime mover. The configurable hydraulic system also enables the load configuration driven by each prime mover to be changed without losing the benefit of a separate, sealed hydraulic system associated with each specific prime mover.

Abstract: To address concerns of kobe plug cap portions being inadvertently removed, for example, by abutment with strings or tools passing thereby, a shielding structure may be employed to protect the cap against inadvertent removal. The port opening tool useful with the kobe plug is selected to overcome the shielding structure to open the kobe plug. To address concerns of a portion of the kobe plug becoming loose in the tubing string inner bore, a capturing mechanism may be provided that captures the cap portion after it is removed to open the kobe plug and prevented the cap portion from becoming loose in the inner bore of the tubing string.

Abstract: Methods and washing tools are described for combined cleaning of an annulus in a well across a longitudinal section (L1) of the well, and subsequent plugging of the longitudinal section (L1).

Abstract: To address concerns of kobe plug cap portions being inadvertently removed, for example, by abutment with strings or tools passing thereby, a shielding structure may be employed to protect the cap against inadvertent removal. The port opening tool useful with the kobe plug is selected to overcome the shielding structure to open the kobe plug. To address concerns of a portion of the kobe plug becoming loose in the tubing string inner bore, a capturing mechanism may be provided that captures the cap portion after it is removed to open the kobe plug and prevented the cap portion from becoming loose in the inner bore of the tubing string.

Abstract: A process for fracturing a lined well uses a packer assembly in a liner string that provides a cement-free segment and interface with the formation. The device has multiple packers with inflatable elements that are run as an integral assembly. After the liner assembly is positioned, cement is circulated into the assembly and wiped from the interior of the liner string into the annulus. Pressure within the liner string is elevated to initiate time delays for the radial inflation of the packer elements. The inflation radially and axially displaces the cement surrounding the elements before the cement sets. Each packer is subsequently opened to expose the frac ports in the packer directly to the formation for frac operations.

Abstract: A method of isolating annular areas formed by multiple well casings can include providing fluid communication through a wall of one of the casings at a location where another one of the casings outwardly surrounds the first casing, then flowing a cement into an annulus formed radially between the first and second casings, then providing fluid communication through the wall of the first casing and a wall of the second casing, and then flowing another cement into another annulus external to the second casing. A method of abandoning a well can include perforating a casing at a location where another casing outwardly surrounds the first casing, flowing a cement into an annulus formed radially between the first and second casings, the cement including a tracer, perforating the first and second casings, and flowing another cement into another annulus external to the second casing, the second cement including a second tracer.

Abstract: A tubular string is advanced with a bottom hole assembly as the hole is drilled and reamed in a desired direction with the aid of directional drilling equipment adjacent the bit. When the advanced tubular forms the desired lap to the existing tubular, the assembly can be configured to cement the tubular and expansion can then be accomplished to fill the annular space and enhance the cement bonding. The expansion equipment can create a bottom bell on the expanded tubular and expand the top end into a bell of the existing tubular so that a monobore is created as the process is repeated with each added string. Numerous variations are contemplated for each single trip including but not limited to the direction of expansion, whether cementing or expansion occurs first, reforming folded tubing in the hole as well as the nature of the expansion tool and pressure control when drilling.

Abstract: An invert emulsion drilling fluid, and a method of drilling with such fluid, having improved rheology at low mud weights and high temperatures. The improved rheology is effected with addition of a rheology additive of the invention comprising fatty dimer diamines or dimer diamines and an organic acid or ester of the acid. A nonlimiting example of such a rheology additive comprises a C36 fatty dimer diamine and adipic acid or dimethyl adipate.

Abstract: For long-term abandonment and monitoring of well systems, a series of barriers are formed within a formation and within a casing of a well to prevent materials from leaking from the well. Formation barriers are formed within the formation at the location of perforations in the casing and along the annulus. A series of casing barriers and fluid barriers are formed within the casing of the well. One or more sensors are formed within the barriers to monitor the conditions around the barriers over long periods of time. The sensors can be configured to measure the conditions around the one or more barriers during formation of the one or more barriers and over long periods of time after the one or more barriers are formed.

Abstract: A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. Heat from the one or more heat sources may pyrolyze at least some hydrocarbons in a part of a subsurface formation. Hydrocarbons and/or other products may be produced from a subsurface formation. Apparatus, methods, and/or processes used in treating a subsurface or hydrocarbon containing formation are described.

Abstract: A downhole plug for plugging and method of controlling fluids within a borehole in an oil and/or gas well. The downhole plug has a body having a throughbore for the passage of fluids. The plug also has a mechanical anchoring device that can radially expand an anchoring member on an outer surface of the body to lock the body in a fixed axial position within the borehole and an annular sealing device that can radially expand a sealing member on the outer surface of the body to seal an annulus formed between the outer surface of the body and an inner surface of the borehole. The plug also has a throughbore plugging device that can change configuration between a first open configuration in which the throughbore of the body permits the passage of fluid, and a second closed configuration in which the throughbore resists the passage of fluid.

Abstract: A method of providing an annular seal around a tubular in a wellbore penetrating a subsurface formation, the method comprising providing a tubular in the wellbore, wherein an annular space (18) is formed around the tubular; providing an annular gravel pack in the annular space; wherein the method further comprises arranging a band (9a, 9b, 9c, 9d) of gel-forming material around the tubular before providing the annular gravel pack, wherein the gel-forming material is swellable in a selected fluid, and wherein the annular seal is formed by contacting the band of gel-forming material with the selected fluid; and a wellbore system comprising a gravel-packed tubular in a wellbore, wherein the tubular is provided with a band of gel-forming material in a layer around the tubular, the band being surrounded by gravel (15), and wherein the gel-forming material is swellable in a selected fluid.

Abstract: A treatment system including a seal assembly operatively arranged with respect to a first zone in a borehole for isolating the first zone from a second zone and a third zone. The second and third zones are located on opposite sides of the first zone. A string assembly extends between the second zone and the third zone, forms a first fluid pathway operatively arranged to bypass the first zone and enable fluid communication between the second and third zones. The first fluid pathway is fluidly connected to an annulus of the borehole for enabling a treatment of the second and third zones to be performed simultaneously. A method of operating a treatment system is also included.

Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.

Abstract: An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation. An optional indicator indicates to a user or operator that a ball or plug has passed a selected one of the valving members.

Abstract: A method and an apparatus for closing an earth borehole, wherein an expandable closure body is inserted into the earth borehole and expanded in its diameter in order to seal the leak. The closure body, at least a part thereof, is moved beyond the lower end of the borehole to enter into the raw material filled cavity, and is expanded within the cavity below the borehole and, with an axially sealing surface, is urged from below against the cavity's sealing surrounding the borehole. With regard to the device, to achieve this, the expandable part has an expandable portion with an axially sealing surface which, once expanded, has a diameter significantly greater than the diameter of the borehole. In order to permit the sealing part being pushed against the borehole wall once it has been expanded inside the cavity, a reversible feed motion or advancing drive is provided.

Abstract: A completion system, including a lower completion installed in a borehole proximate to a downhole formation. An intermediate completion assembly is included directly engaged with the lower completion. The intermediate completion assembly includes a barrier valve and packer device. The barrier valve is operatively arranged to selectively impede fluid flow through the lower completion and the packer device operatively arranged for isolating the formation. An upper completion string is included that is selectably engagable with the intermediate completion assembly. The barrier valve is operatively arranged to be transitionable to an open position when engaged with the upper completion string and transitions to a closed position via the upper completion string when the upper completion string is pulled out of the borehole. A method of completing a borehole is also included.

Abstract: A completion system for arrangement in a borehole including a lower completion, an upper completion string, and an intermediate assembly engaged between the lower completion and the upper completion string. The intermediate assembly includes a single barrier valve only. The barrier valve is operatively arranged to be transitionable to an open position when engaged with the upper completion string and transitions to a closed position via the upper completion string when the upper completion string is pulled out of the borehole. A method of completing a borehole is also included.

Abstract: Of the many compositions and methods provided herein, an example method includes a method of treating a subterranean formation that comprises combining components comprising water and a density-matched suspension to prepare a treatment fluid, wherein the density-matched suspension comprises a suspending liquid and a solid particle suspended in the suspending liquid, and introducing the treatment fluid into a well bore. An example composition includes a suspension that comprises a suspending liquid comprising a hydrophobic liquid, wherein the hydrophobic liquid hydrolyzes when placed in contact with an aqueous fluid to form hydrophilic products, and a solid particle suspended in the suspending liquid, wherein the suspension is a density-matched suspension.

Abstract: A mobile manifold assembly of a fluid system for providing fluid to a wellsite during well construction. The fluid system includes auxiliary components including at least one fluid source, mixer and high pressure pump. The manifold assembly includes a modular manifold and a mobile frame. The modular manifold includes manifold pumps, valves and pipes integrated together for transport. Connector portions of the pipes extend from the modular manifold in an arrangement corresponding to an arrangement of the auxiliary components to define a plug-in configuration therebetween such that the connector portions of the pipes are positionable in alignment with the auxiliary components for direct and removable connection therewith. The manifold pumps and valves are positioned about the pipes to selectively pump the fluid. The modular manifold is securable to a base of the mobile frame whereby the modular manifold is transportable to the auxiliary components for operable connection therewith.

Abstract: A technique facilitates downhole service operations including cementing operations. A retrievable cementing bushing is designed to facilitate the service operation and includes a body on which is mounted an engagement lug. The engagement lug is mounted for movement in a radial direction and includes an outer engagement feature and an inner engagement feature. The inner engagement feature is oriented for cooperation with a slick joint. The engagement lug is biased in a radially outward direction for engagement with corresponding features of a surrounding wall.

Abstract: A depressurization tool is described for use downhole in depressurizing an isolated zone. A decompression chamber containing a compressible fluid volume is described. The opening of the chamber is sealed with a closure that is configured to open upon application of a pressure differential across the opening. When used downhole within an isolated and nonpermeable wellbore zone, excessive ambient pressure will cause the closure to open and allow the chamber to fill with fluid at increased pressure, depressurizing the wellbore zone. The tool is useful in wellbore completion systems that include sliding sleeves.

Abstract: A cement retainer comprises a plug that may be run into casing on a wire line and set in a conventional manner. A passage through the plug allows cement to be pumped therethrough. A wiper plug follows the cement, wipes the inside of the casing and latches onto the retainer to prevent back flow of cement. In some embodiments, the cement retainer and wiper plug are made of drillable materials allowing a series of squeeze operations to be conducted, one after another without undue delay, and then be drilled up in a single bit run. In some embodiments, the cement retainer and wiper plug are made of metals, drillable or non-drillable, or other long lived materials in order to plug wells in the process of abandoning them.

Abstract: An expandable tubular assembly includes an expander for expanding a tubular. The expander may be hydraulically actuated. A bore obstruction object may be received in a receptacle sleeve that is a modular component of the expandable tubular assembly. In this respect, the expandable tubular assembly may be quickly fitted with a receptacle sleeve designed to receive selected type of bore obstruction object.

Abstract: In one embodiment, a casing bit drive assembly may be used with a casing drilling system. The casing bit drive assembly may include one or more of the following: a retrievable drilling motor; a decoupled casing sub; a releasable coupling between the motor and casing bit; a releasable coupling between the motor and casing; a cement diverter; and a casing bit.

Abstract: When performing subterranean treatment operations, it can be desirable to temporarily divert or block fluid flow by forming a degradable fluid seal. Methods for forming a degradable fluid seal can comprise: providing a sealing composition comprising: a degradable polymer, and a water-soluble material comprising a first portion and a second portion of rigid particulates, each portion having a sealing time and a particulate size distribution associated therewith, the particulate size distributions of the first portion and the second portion differing from one another; determining an amount of the first portion relative to the second portion needed to produce a degradable fluid seal having a desired sealing time that is different than that of the sealing time of either the first portion or the second portion; introducing the sealing composition into a subterranean formation; and allowing the sealing composition to form a degradable fluid seal in the subterranean formation.

Abstract: A method for preventing undesired cement flow in a well containing a tubing string, comprises: determining a desired pressure drop for a desired flow rate at a desired location in the tubing string, determining a flow area that will cause the desired pressure drop, and installing in the tubing string a choke having at least one port, wherein the total area of the port or ports equals the desired flow area. The choke may include at least two ports, one of which may include a least one rupture disk disposed selected to rupture when the pressure drop across the choke exceeds a predetermined value. The choke may be below a float collar in the well. The invention allows the use of foamed cement and in particular foamed cement having a density that is less than the lowest density that could have been used if the choke were not in place.

Abstract: Of the many compositions and methods provided herein, one method includes providing a drilling fluid comprising a base drilling fluid and a plurality of particulates, wherein the base drilling fluid without the particulates is characterized by N1(B) and wherein the base drilling fluid with the particulates is characterized by N1(A); and adjusting a concentration of the particulates in the drilling fluid by comparing the value of ?N1(F) to ?N1(P) so that ?N1(F)??N1(P), wherein ?N1(F)=|N1(A)|?|N1(B)|.

Abstract: A method for determining a Plug Normal Stress Difference (?N1(P)) may include providing a test base drilling fluid that is characterized by N1(TB); adding a first concentration of a test particulate to the test base drilling fluid; adjusting the concentration of the test particulate in the test base drilling fluid to achieve a minimum concentration of the test particulate in the test base drilling fluid that will substantially plug a tapered slot, wherein the test base drilling fluid with the minimum concentration of the test particulate is characterized by N1(TA); and calculating ?N1(P)=|N1(TA)|?|N1(TB)| wherein each First Normal Stress Difference is measured by the same procedure.

Abstract: In subterranean operations, additives used in treatment fluids such as drilling and cementing fluids include weighting agents; a method includes the steps of providing a treatment fluid for use in a subterranean formation comprising a weighting agent, the weighting agent comprising a micronized metal oxide particle and a polymer linked to the metal oxide particle, the method including introducing the treatment fluid into the subterranean formation.

Abstract: Methods include introducing a casing into a wellbore penetrating a subterranean formation, the casing forming an annulus with the wellbore surface, where the casing is subject to a first pressure value at a distal end and a second pressure value at a proximal region within the casing, and where a shoe is positioned at the distal end of the casing. Then, placing a sealable valve within the proximal region of the casing, injecting a first cement composition into the casing, through the sealable valve and shoe, and into the annulus, and the placing a second cement composition in a medial region of the tubular formed between the distal end and the proximal region. Afterward, the sealable valve is closed.

Abstract: A capture device for a bore hole of a fluid source, has a base plate (6) that can be anchored at the floor, over the bore hole, and has a bore hole opening (8) through which fluid can be streamed out of the bore hole. An ascending pipe (2) is arranged over the bore hole opening (8). Guide baffles (9) are arranged around the bore hole opening (8), and have blades (10) fixed to the top of the base plate (6) so that the guide baffles (6) can be pivoted and displaced. The blades (10) encompass the longitudinal end (3) of the ascending pipe (2) that faces the bore hole opening (8) like a flower and overlap one another, whereby fluid flowing from the bore hole opening (8) can be captured via the blades (10) and discharged to the ascending pipe (2).

Abstract: Embodiments disclosed herein relate to an apparatus to fluidly couple to a casing string. The apparatus may include a fill-up and circulating tool having a flow path extending therethrough, in which the fill-up and circulating tool may be configured to fluidly seal internally within an upper end of the casing string. The apparatus may further include a cementing head assembly having a flow path extending therethrough, in which the flow path of the cementing head assembly is fluidly coupled to the flow path of the fill-up and circulating tool, and a releasing mechanism coupled to the cementing head assembly, in which the releasing mechanism is configured to release a fluid-conveyed sealing device through the cementing head assembly and into the fill-up and circulating tool.

Abstract: A solid zirconium cross-linking agent and use in a cross-linking composition in oil field applications such as hydraulic fracturing and plugging of permeable zones. The zirconium cross-linking agent is prepared by a process comprising contacting a zirconium complex with an alkanolamine and water at particular mole ratios of alkanolamine and water to zirconium.

Abstract: A system and method facilitate sidetracking by eliminating one or more trips downhole. A sidetracking system includes a whipstock assembly and a stinger assembly. The stinger assembly has a stinger which extends at least partially through the whipstock assembly. The stinger is coupled to a sub of the sidetracking system by a releasable latch mechanism, such as a shear pin or collet.

Abstract: Methods for heating a material within a wellbore using nano-particles such as carbon nano-tubes. The material may be a flowable material such as cement, drilling mud, an acidizing fluid, or other material. Generally the methods comprise placing the flowable material in proximity to a radial wall of a wellbore. The methods also include running an energy generator into the wellbore. In one aspect, energizing the nano-particles in the filter cake causes the nano-particles to be activated, and increases a temperature within the flowable material to a temperature that is greater than an initial circulation temperature of the flowable material. Activating the energy generator may also assist in curing the flowable material in situ.

Abstract: A one-way flowable anchoring system includes a plurality of same anchors that are sealedly fixedly engagable within a structure and each of the plurality of same anchors has a flow bore longitudinally therethrough with a first seat and a second seat on opposing ends thereof The system also has a plug positionable within the structure between two of the plurality of same anchors positioned longitudinally adjacent one another.

Abstract: The subject disclosure relates to expandable structures that seal and block cross-sections of a wellbore. In an embodiment, the apparatus comprises a plurality of structure plates and at least one expandable structure, the apparatus operable to change a perimeter diameter and block a cross-section when deployed.

Abstract: A method of variably restricting flow in a subterranean well can include resisting flow through a flow path, and then selectively opening a pressure barrier which previously prevented flow through another flow path. The flow paths are configured for parallel flow. A flow restrictor system for use with a subterranean well can include at least two flow paths configured for parallel flow, a flow restrictor which resists flow through one flow path, and a pressure barrier which prevents flow through another flow path. The pressure barrier is selectively openable to permit flow through the second flow path.

Abstract: A method for drilling and completing multiple wellbores in a subsurface rock formation includes drilling a first wellbore along a first selected trajectory through the rock formation. The first wellbore is fracture treated and then abandoned. A second wellbore is drilled along a second selected trajectory through the rock formation. The second trajectory is laterally spaced from the first trajectory. The second wellbore is then fracture treated and abandoned. A third wellbore is drilled along a third selected trajectory through the rock formation. The third trajectory is disposed between the first and second trajectories. The third wellbore is fractured treated such that a fracture network extending therefrom hydraulically connects to fracture networks extending from the first and second wellbores.

Abstract: Return flow diverters are provided for which are adapted to allow return flow during cementing of a liner for a well. The return flow diverter comprises a cylindrical body adapted for installation in a well as part of the liner. The cylindrical body has a fluid port therein adapted to allow fluids displaced by a cementing operation to flow from an annulus between the liner and the well into the cylindrical body. The return flow diverter also comprises a cover supported on the cylindrical body for movement from an open position, in which the port is open, to a closed position, in which the port is closed by the cover, a transmission disposed within the cylindrical body and defining a cylindrical passageway adapted to accommodate a tubular conduit.