Abstract: A system includes a seal assembly that includes an annular body, an interior sealing assembly coupled to an interior surface of the body, and an exterior sealing assembly coupled to an exterior surface of the body. The interior sealing assembly is actuated by a first piston and configured to form a seal between the body and a first fixed substantially tubular member disposed radially interior of the body. The exterior sealing assembly is actuated by a second piston, and configured to form a seal between the body and a second fixed substantially tubular member disposed about the seal assembly. The seal assembly is configured to be run through a blowout preventer (BOP) stack and installed between the first and second fixed substantially tubular members to seal a mineral extraction well.

Abstract: A system includes a seal assembly that includes an annular body, an interior sealing assembly coupled to an interior surface of the body, and an exterior sealing assembly coupled to an exterior surface of the body. The interior sealing assembly is actuated by a first piston and configured to form a seal between the body and a first fixed substantially tubular member disposed radially interior of the body. The exterior sealing assembly is actuated by a second piston, and configured to form a seal between the body and a second fixed substantially tubular member disposed about the seal assembly. The seal assembly is configured to be run through a blowout preventer (BOP) stack and installed between the first and second fixed substantially tubular members to seal a mineral extraction well.

Abstract: A low-profile wellhead system having a nested hanger configuration, annular communication, elastomeric seals, and seal verification is provided.

Abstract: A tool is provided for installing a mandrel in a wellhead assembly. The tool includes an assembly having multiple independently translatable and rotatable members. The tool includes an inner member disposed in an inner sleeve. The inner member may be disposed in a first position and second position, such that in the first position the inner sleeve freely rotates and in the second position rotation of the inner sleeve causes rotation of the inner member. An outer sleeve is disposed over the inner sleeve and may be coupled to a hold down ring. The inner member may be coupled to mandrel. The tool may be inserted into a wellhead assembly and the outer rotated to engage the hold down ring, the inner and outer sleeve may be translated axially to allow rotation of the inner member to disengage the tool from the mandrel.

Abstract: A tool is provided for installing a mandrel in a wellhead assembly. The tool includes an assembly having multiple independently translatable and rotatable members. The tool includes an inner member disposed in an inner sleeve. The inner member may be disposed in a first position and second position, such that in the first position the inner sleeve freely rotates and in the second position rotation of the inner sleeve causes rotation of the inner member. An outer sleeve is disposed over the inner sleeve and may be coupled to a hold down ring. The inner member may be coupled to mandrel. The tool may be inserted into a wellhead assembly and the outer rotated to engage the hold down ring, the inner and outer sleeve may be translated axially to allow rotation of the inner member to disengage the tool from the mandrel.

Abstract: A tool is provided for installing a mandrel in a wellhead assembly. The tool includes an assembly having multiple independently translatable and rotatable members. The tool includes an inner member disposed in an inner sleeve. The inner member may be disposed in a first position and second position, such that in the first position the inner sleeve freely rotates and in the second position rotation of the inner sleeve causes rotation of the inner member. An outer sleeve is disposed over the inner sleeve and may be coupled to a hold down ring. The inner member may be coupled to mandrel. The tool may be inserted into a wellhead assembly and the outer rotated to engage the hold down ring, the inner and outer sleeve may be translated axially to allow rotation of the inner member to disengage the tool from the mandrel.

Abstract: A low-profile wellhead system having a nested hanger configuration, annular communication, elastomeric seals, and seal verification is provided.

Abstract: A tool is provided for installing a mandrel in a wellhead assembly. The tool includes an assembly having multiple independently translatable and rotatable members. The tool includes an inner member disposed in an inner sleeve. The inner member may be disposed in a first position and second position, such that in the first position the inner sleeve freely rotates and in the second position rotation of the inner sleeve causes rotation of the inner member. An outer sleeve is disposed over the inner sleeve and may be coupled to a hold down ring. The inner member may be coupled to mandrel. The tool may be inserted into a wellhead assembly and the outer rotated to engage the hold down ring, the inner and outer sleeve may be translated axially to allow rotation of the inner member to disengage the tool from the mandrel.

Abstract: A full bore support system for a hanger or other equipment in a wellhead features a support groove in the wellhead that can be integrally made or on an insert. A support ring can have a variety of configuration and features an energizing surface and a limit surface that ultimately share the load. The receiving groove is configured to guide the support ring as it expands to minimize bending and distortion. The support ring is recessed and protected until it is actuated outwardly into a supporting position. A high strength low modulus material is preferred to withstand the radial expansion and the applied loads and environmental conditions. Various shapes for the ring are contemplated including a C-ring and a ring made from segments movable with respect to each other.

Abstract: A connector for securing tubular members or conduits in sealed end to end relationship is disclosed. A split ring biased to an unlocked position is carried on the pin connection member in a recess. After the connection is made, the split ring is expanded through a window in the box connection member and locked in place. Alternative embodiments showing a split ring biased to a locked position and a split ring with an articulated joint are shown. A fourth embodiment that allows preloading of the split ring is shown also.

Abstract: A connector for securing tubular members or conduits in sealed end to end relationship is disclosed. A split ring biased to an unlocked position is carried on the pin connection member in a recess. After the connection is made, the split ring is expanded through a window in the box connection member and locked in place. Alternative embodiments showing a split ring biased to a locked position and a split ring with an articulated joint are shown. A fourth embodiment that allows preloading of the split ring is shown also.

Abstract: A connector for securing tubular members or conduits in sealed end to end relationship is disclosed. A split ring biased to an unlocked position is carried on the pin connection member in a recess. After the connection is made, the split ring is expanded through a window in the box connection member and locked in place. Alternative embodiments showing a split ring biased to a locked position and a split ring with an articulated joint are shown. A fourth embodiment that allows preloading of the split ring is shown also.

Abstract: A connector for securing tubular members or conduits in sealed end to end relationship is disclosed. A securing means in the form of a split ring biased to an unlocked position is carried on the pin connection member in a recess. After the connection is made, the split ring is expanded through a window in the box connection member and locked in place. Alternative embodiments showing a split ring biased to a locked position and a split ring with an articulated joint are shown. A fourth embodiment that allows preloading of the split ring is shown also.

Abstract: An apparatus for securing a tubular member under tension is provided, the member secured to and extending between a first and second fixed assembly. The apparatus comprises a first tubular assembly connectable at a first region to the tubular member to be tensioned and a second tubular assembly having a first and a second engageable portion, the second tubular assembly being arranged concentrically with respect to the first tubular assembly and movable longitudinally with respect to the first tubular assembly. A first engagement assembly is provided for engaging the first engageable portion of the second tubular assembly with the first fixed assembly, such that movement of the second tubular assembly toward the tubular member to be tensioned is prevented.

Abstract: An apparatus for securing a tubular member under tension is provided, the member secured to and extending between a first and second fixed assembly. The apparatus comprises a first tubular assembly connectable at a first region to the tubular member to be tensioned and a second tubular assembly having a first and a second engageable portion, the second tubular assembly being arranged concentrically with respect to the first tubular assembly and movable longitudinally with respect to the first tubular assembly. A first engagement assembly is provided for engaging the first engageable portion of the second tubular assembly with the first fixed assembly, such that movement of the second tubular assembly toward the tubular member to be tensioned is prevented.

Abstract: A tensioning device is disclosed which brings two tubular segments closer together with an intermediate adjustment sleeve. The sleeve is threaded externally and may be accessed internally by a tool to rotate it. The threaded sleeve is secured to the upper tubular in a manner that permits relative rotation. Rotation of the sleeve advances it downwardly in the lower tubular, pulling down the upper tubular secured to the rotating sleeve. The upper tubular translates until a load shoulder hits a support surface in the wellhead to achieve the desired tension in the string.

Abstract: An improved wellhead slip and seal assembly including a slip assembly with slips supported in a slip bowl and with the seal assembly positioned above and interconnected to the slip assembly. The seal assembly includes a segmented retainer ring which is at least partially radially compressible and having inner and outer recesses in which resilient sealing rings are positioned and the retainer ring has an outer diameter at such recesses which is larger than the inner diameter of the housing in which it is to be positioned and includes an external tapered surface from said outer diameter to a smaller outer diameter therebelow which is smaller than the inner diameter of the housing so that the retainer ring is moved radially inwardly as it is moved into position within said wellhead housing. Means interconnects the slip bowl and the segmented retainer ring to assist in retaining the seal ring in its desired position until the assembly has been landed within the wellhead housing.

Abstract: The hanger apparatus includes a segmented bowl structure which includes inner tapered surfaces which are adapted to coact with the outer surfaces of the slips supported on the bowl segments and a lower outer tapered seat which is adapted to engage a shoulder within the well structure. A packing structure is connected to the upper end of the bowl segments and includes an upper plate ring, a lower seat ring having a lower outer seating surface, and a resilient packing ring positioned between the upper plate ring and the lower seat ring. Cap screws engage upper plate ring and extend through the packing ring and the seat ring and are threaded into the bowl segments. The upper plate ring moves downward with the initial downward movement of the bowl segments during setting to compress the packing ring into sealing engagement between the exterior of the string and the interior of the wellhead housing.

Abstract: A packoff for sealing between an external cylindrical surface and a member therearound having a resilient ring, metal seal rings on the end surfaces of the resilient ring, the exterior of the resilient ring being concave to provide an annular recess, means for injecting and pressurizing plastic packing in said annular recess to cause sealing engagement of said metal seal rings and means to prevent leakage of pressure from the annular recess, and the inner and outer flanges on said metal seal rings providing a metal-to-metal seal.

Abstract: A hanger for supporting tubing in a well head including a tubular body adapted for connection to a casing head and having a tapered and upwardly facing seat, a tubular hanger positioned within the body and supported on the seat, a downwardly converging annular space between facing portions on the exterior of the hanger and on the interior of the body, a metal seal ring positioned within the converging space, a seal actuator sleeve positioned between the hanger and the body and being movable axially to engage the seal ring, and a wedging screw extending through the body. The wedging screw engages the seal actuator sleeve and wedges the seal actuator sleeve onto the seal whereby the seal is forced into sealing engagement in the converging space between the hanger and the body.