Abstract: A casing patch system comprising a base tubular with two anchor/seals coupled to the base tubular and an expansion tool comprising two expansion devices positioned such that upon expansion of the first anchor/seal, the second expansion device engages the second anchor/seal. In another embodiment, the expansion device comprises two swages coupled to a shaft at a distance between them approximately equal to the length of the anchor/seal. The swage diameters are selected such that the expansion forces of the anchor/seal by front and back swages are approximately equal.

Abstract: A disconnect device for use as part of a downhole assembly in an oil or gas well. In one embodiment, the device comprises a lower receptacle assembly comprising a recess profile; an upper assembly comprising: a shaft comprising a fluid passage, a collet comprising collet fingers, a piston, a cylinder assembly, a pressure chamber disposed radially between the shaft and the cylinder assembly, and a spring, wherein the piston is selectively movable into three positions.

Abstract: A hydraulic thruster system for providing an axial force. In one embodiment, the system comprises a pump, a motor for driving the pump, and a hydraulic thruster comprising: a cylinder comprising a plurality of cylinder pistons; a shaft comprising a plurality of shaft pistons; a plurality of first pressure chambers; and a plurality of second pressure chambers, wherein the plurality of shaft pistons are positioned inside the cylinder, between the cylinder pistons to form the plurality of first and a second pressure chambers, wherein the shaft further comprises a first fluid passage connected to the pump and to the first pressure chambers, and a second fluid passage connected to the pump and to the second pressure chambers, and wherein the pump may pump fluid into the first pressure chambers and suction fluid from the second pressure chambers providing an axial force between the shaft and the cylinder.

Abstract: A casing patch system comprising a base tubular with two anchor/seals coupled to the base tubular and an expansion tool comprising two expansion devices positioned such that upon expansion of the first anchor/seal, the second expansion device engages the second anchor/seal, which allows reduction of the expansion forces due to sequential expansion and reduces the length of the displacement necessary for setting the casing patch, eliminating the need for resetting the thruster, which allows deployment and setting of the casing patch on a wireline. In another embodiment, the expansion device comprises two swages coupled to a shaft at a distance between them approximately equal to the length of the anchor/seal.

Abstract: A hydraulic thruster system for providing an axial force. In one embodiment, the system comprises a pump, a motor for driving the pump, and a hydraulic thruster comprising: a cylinder comprising a plurality of cylinder pistons; a shaft comprising a plurality of shaft pistons; a plurality of first pressure chambers; and a plurality of second pressure chambers, wherein the plurality of shaft pistons are positioned inside the cylinder, between the cylinder pistons to form the plurality of first and a second pressure chambers, wherein the shaft further comprises a first fluid passage connected to the pump and to the first pressure chambers, and a second fluid passage connected to the pump and to the second pressure chambers, and wherein the pump may pump fluid into the first pressure chambers and suction fluid from the second pressure chambers providing an axial force between the shaft and the cylinder.

Abstract: A thread protector for threads of the pipe has a collet having an inner surface, and outer surface and an end surface, a sleeve cooperative with the collet, and an arm pivotally mounted to the sleeve and having a surface bearing against the and surface of the collet. The collet is adapted to engage the threads of the pipe. The sleeve has a plurality of tapered surfaces thereon. The arm is movable between a first position in which the collet is free of the threads of the pipe and a second position in which the collet moves along the tapered surfaces of the sleeve such that the collet engages the threads of the pipe.

Abstract: A hybrid sub for perforating guns includes a metallic tubular body. A metallic pin member is encapsulated by a plastic body. The plastic body preferably has threads on exterior surface thereof which form a thread union with threads on the interior surface of the metallic tubular body. The pin member may be threadedly received in the interior plastic body. A perforating gun sub having a pin member encapsulated by a plastic body is also disclosed, wherein the need for an outer metallic tubular body is eliminated.

Abstract: A hydraulic thruster system for providing an axial force. In one embodiment, the system comprises a pump, a motor for driving the pump, and a hydraulic thruster comprising: a cylinder comprising a plurality of cylinder pistons; a shaft comprising a plurality of shaft pistons; a plurality of first pressure chambers; and a plurality of second pressure chambers, wherein the plurality of shaft pistons are positioned inside the cylinder, between the cylinder pistons to form the plurality of first and a second pressure chambers, wherein the shaft further comprises a first fluid passage connected to the pump and to the first pressure chambers, and a second fluid passage connected to the pump and to the second pressure chambers, and wherein the pump may pump fluid into the first pressure chambers and suction fluid from the second pressure chambers providing an axial force between the shaft and the cylinder.

Abstract: A disconnect device for use as part of a downhole assembly in an oil or gas well. In one embodiment, the device comprises a lower receptacle assembly comprising a recess profile; an upper assembly comprising: a shaft comprising a fluid passage, a collet comprising collet fingers, a piston, a cylinder assembly, a pressure chamber disposed radially between the shaft and the cylinder assembly, and a spring, wherein the piston is selectively movable into three positions.

Abstract: A thread protector for use on a sucker rod or a drill pipe has a collet with a plurality of collet segments in which each of the plurality of collet segments has a protrusion adjacent an end thereof, and a sleeve overlying the collet and movable between a first position and a second position. The second position compresses the plurality of collet segments such that the protrusion engages with the thread relief of the sucker rod or drill pipe. This retains the sleeve and the plurality of collet segments over the threaded end of the pipe so as to protect the threaded end of the pipe. The sleeve is movable to the first position such that the protrusions of the plurality of collet segments release from the thread relief so as to allow the thread protector to be removed from the threaded end of the pipe.

Abstract: A thread protector for threads of the pipe has a collet having an inner surface, and outer surface and an end surface, a sleeve cooperative with the collet, and an arm pivotally mounted to the sleeve and having a surface bearing against the and surface of the collet. The collet is adapted to engage the threads of the pipe. The sleeve has a plurality of tapered surfaces thereon. The arm is movable between a first position in which the collet is free of the threads of the pipe and a second position in which the collet moves along the tapered surfaces of the sleeve such that the collet engages the threads of the pipe.

Abstract: A casing patch system comprising a base tubular with two anchor/seals coupled to the base tubular and an expansion tool comprising two expansion devices positioned such that upon expansion of the first anchor/seal, the second expansion device engages the second anchor/seal, which allows reduction of the expansion forces due to sequential expansion and reduces the length of the displacement necessary for setting the casing patch, eliminating the need for resetting the thruster, which allows deployment and setting of the casing patch on a wireline. In another embodiment, the expansion device comprises two swages coupled to a shaft at a distance between them approximately equal to the length of the anchor/seal.

Abstract: A casing patch system comprising a base tubular with two anchor/seals coupled to the base tubular and an expansion tool comprising two expansion devices positioned such that upon expansion of the first anchor/seal, the second expansion device engages the second anchor/seal, which allows reduction of the expansion forces due to sequential expansion and reduces the length of the displacement necessary for setting the casing patch, eliminating the need for resetting the thruster, which allows deployment and setting of the casing patch on a wireline. In another embodiment, the expansion device comprises two swages coupled to a shaft at a distance between them approximately equal to the length of the anchor/seal.

Abstract: A universal thread protector is provided for protecting either of the pin and box ends of a pipe. The thread protector has a cap with an open end the closed end. A seal element is positioned within and adjacent to the open end of the cap. A ring member is positioned against the seal element between the seal element and the closed end of the cap. Bolts are provided having an end positioned against the ring member. The bolts are movable from an unactuated position to an actuated position wherein the bolt applies a force against the ring member when in the actuated position. As such, the ring member pushes against the seal element so as to deform or compress the seal element against the outer diameter of the pipe positioned within the cap. A method of protecting the threaded ends of pipe is also disclosed.

Abstract: A thread protector for use on a sucker rod or a drill pipe has a collet with a plurality of collet segments in which each of the plurality of collet segments has a protrusion adjacent an end thereof, and a sleeve overlying the collet and movable between a first position and a second position. The second position compresses the plurality of collet segments such that the protrusion engages with the thread relief of the sucker rod or drill pipe. This retains the sleeve and the plurality of collet segments over the threaded end of the pipe so as to protect the threaded end of the pipe. The sleeve is movable to the first position such that the protrusions of the plurality of collet segments release from the thread relief so as to allow the thread protector to be removed from the threaded end of the pipe.

Abstract: An apparatus, method, and system for repairing wellbore casing. In one embodiment, an expandable casing patch system for a wellbore includes a casing patch deployment apparatus. The casing patch deployment apparatus includes a shaft having a frontward end and a rearward end as well as a thruster and a main expansion swage disposed on the shaft. The casing patch deployment apparatus also includes an anchor disposed on the shaft. The anchor is disposed frontward of the main expansion swage. In addition, the casing patch deployment apparatus includes a front expansion swage disposed frontward of the anchor and attached to the shaft. The front expansion swage has a diameter less than a diameter of the main expansion swage. The expandable casing patch system also includes an expandable casing patch.

Abstract: A universal thread protector is provided for protecting either of the pin and box ends of a pipe. The thread protector has a cap with an open end the closed end. A seal element is positioned within and adjacent to the open end of the cap. A ring member is positioned against the seal element between the seal element and the closed end of the cap. Bolts are provided having an end positioned against the ring member. The bolts are movable from an unactuated position to an actuated position wherein the bolt applies a force against the ring member when in the actuated position. As such, the ring member pushes against the seal element so as to deform or compress the seal element against the outer diameter of the pipe positioned within the cap. A method of protecting the threaded ends of pipe is also disclosed.

Abstract: An apparatus, method and system repair wellbore casing. In one embodiment, an expandable casing patch system for a wellbore includes a casing patch deployment apparatus. The casing patch deployment apparatus includes a shaft having a frontward end and a rearward end as well as a thruster and a main expansion swage disposed on the shaft. The casing patch deployment apparatus also includes an anchor disposed on the shaft. The anchor is disposed frontward of the main expansion swage. In addition, the casing patch deployment apparatus includes a front expansion swage disposed frontward of the anchor and attached to the shaft. The front expansion swage has a diameter less than a diameter of the main expansion swage. The expandable casing patch system also includes an expandable casing patch.

Abstract: Conventional formation evaluation with dual inflatable packers includes the steps of pressurizing the packers so as to isolate an annular portion of the borehole wall, collecting one or more samples of formation fluid via the isolated portion of the borehole wall, and depressurizing the packers so as to permit movement of the mandrel within the borehole. A sampling method and apparatus that utilize one or more of the following to advantage is provided: restricting deformation of the packers during inflation using an annular bracing assembly; actively retracting the packers using ambient borehole pressure; and substantially centralizing the mandrel intermediate the packers so as to resist buckling of the mandrel.

Abstract: Conventional formation evaluation with dual inflatable packers includes the steps of pressurizing the packers so as to isolate an annular portion of the borehole wall, collecting one or more samples of formation fluid via the isolated portion of the borehole wall, and depressurizing the packers so as to permit movement of the mandrel within the borehole. A sampling method and apparatus that utilize one or more of the following to advantage is provided: restricting deformation of the packers during inflation using an annular bracing assembly; actively retracting the packers using ambient borehole pressure; and substantially centralizing the mandrel intermediate the packers so as to resist buckling of the mandrel.