Abstract: A system includes a wellhead tiedown system having a lock screw configured to move axially within an aperture of a spool. The wellhead tiedown system also has a first gland configured to couple to the spool within the aperture and block axial movement of the lock screw in a first direction, and a second gland configured to couple to the lock screw and block axial movement of the lock screw without rotation.

Abstract: A rotating flow head (RFH) has a housing having an internal bore with diameter substantially equal to that of a riser and at least one flow port proximate one longitudinal end thereof. First and second arrays of radially extensible and retractable locking elements are disposed circumferentially around the RFH housing. The RFH has a bearing assembly (BA) housing having an exterior diameter selected to fit within the internal bore of the RFH housing so as to provide an annular space therein. The BA housing engages one of the arrays of locking elements when extended. A mandrel is rotatably, sealingly supported within the BA housing. Another end of the BA housing and the other array of locking elements provide longitudinal force on the BA housing when the other array is extended. A seal element disposed in the annular space is energized by the longitudinal force applied to the BA housing.

Abstract: A completion system is provided for completing downhole wells, comprising an upper polished bore receptacle incorporated into an intermediate casing of the downhole well and formed with a honed inner bore. A bottom packer for supporting a completion string within the intermediate casing has a first sealing assembly for sealing engagement against the inner bore of the upper polished bore receptacle. A lower polished bore receptacle is further incorporated into the intermediate casing and formed with a honed inner bore. A flow control hanger in the form of a hollow mandrel hangs a production liner in the intermediate casing and has a second sealing assembly for sealing engagement against an inner bore of the lower polished bore receptacle. A further completion system is provided comprising a polished bore receptacle (PBR) and a latch down packer having a lower end to which the PBR is connected.

Abstract: A non-rotation lock screw for a wellhead assembly is provided that includes a rotating portion and a non-rotating portion. The non-rotating portion includes a distal end configured to engage a component of the wellhead assembly, and may include one or more seals. The rotating portion may be rotating into a component of wellhead assembly such that the non-rotating portion translates in a radial direction. The rotating portion and non-rotating portion may be coupled together via a bearing to enable free rotation of the rotating portion. Systems and methods of operation that include the non-rotation lock screw are also provided.

Abstract: A seal assembly for a nested dual drill pipe includes a tube having a female seal assembly and a male seal assembly at the longitudinal ends. The female seal assembly includes a larger internal diameter portion, a taper adjacent thereto and a smaller internal diameter portion adjacent to the taper. The male seal assembly includes a smaller external diameter portion, a seal groove adjacent thereto and a larger external diameter portion adjacent to the seal groove. The smaller internal diameter portion and the larger external diameter portion have diameters selected to enable free longitudinal movement of the male seal assembly into the female seal assembly while limiting axial displacement to maintain the seal ring fully energized.

Abstract: A marine riser assembly having a first tubular member having an external surface with a plurality of first axially spaced formations, a second tubular member having an external surface with a plurality of second axially spaced formations thereon, a segmented ring in surrounding relationship to the first and second tubular members, the segmented ring having an inner surface with a plurality of formations engageable with the formations on the first and second tubular members, the engageable formations serving to urge the first and second tubular members toward each other when the segmented ring is subjected to radially inwardly directed compressive forces, a sleeve in surrounding relationship to force the engageable formations together and a seal assembly for sealing against external and internal pressure.

Abstract: A marine riser assembly having a first tubular member having an external surface with a plurality of first axially spaced formations, a second tubular member having an external surface with a plurality of second axially spaced formations thereon, a segmented ring in surrounding relationship to the first and second tubular members, the segmented ring having an inner surface with a plurality of formations engageable with the formations on the first and second tubular members, the engageable formations serving to urge the first and second tubular members toward each other when the segmented ring is subjected to radially inwardly directed compressive forces, a sleeve in surrounding relationship to force the engageable formations together and a seal assembly for sealing against external and internal pressure.

Abstract: A marine riser assembly having a first tubular member having an external surface with a plurality of first axially spaced formations, a second tubular member having an external surface with a plurality of second axially spaced formations thereon, a segmented ring in surrounding relationship to the first and second tubular members, the segmented ring having an inner surface with a plurality of formations engageable with the formations on the first and second tubular members, the engageable formations serving to urge the first and second tubular members toward each other when the segmented ring is subjected to radially inwardly directed compressive forces, a sleeve in surrounding relationship to force the engageable formations together and a seal assembly for sealing against external and internal pressure.

Abstract: A wall bushing for an air-conditioner comprises an external pipe and an internal pipe. The cross section of the external pipe is a “sports ground” shape, and an inner circular wall of the external pipe is tangential to an outer circular wall of the internal pipe. An end of the internal pipe is connected to an air outlet port of the air conditioner, and an end of the external pipe is connected to an air inlet port.

Abstract: A marine riser assembly having a first tubular member having an external surface with a plurality of first axially spaced formations, a second tubular member having an external surface with a plurality of second axially spaced formations thereon, a segmented ring in surrounding relationship to the first and second tubular members, the segmented ring having an inner surface with a plurality of formations engageable with the formations on the first and second tubular members, the engageable formations serving to urge the first and second tubular members toward each other when the segmented ring is subjected to radially inwardly directed compressive forces, a sleeve in surrounding relationship to force the engageable formations together and a seal assembly for sealing against external and internal pressure.

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 tubular connection 7 is provided for connecting an upper tubular member 10 with a lower tubular member 12. A radially movable latch body 20 is positioned outward of the tubular members. Outer load flanks 25 on the latch body are slidably engageable with inner load flanks 24 on the tubular members. A radially projecting member 32 and a corresponding guide recess 34 are provided for guiding the latch body with respect to one of the tubular members. A safety actuator 30 and corresponding mating surface 38 may also be provided for urging the latch body outward.

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: The invention relates to a slip type casing hanger assembly, having a hanger body with an annulus, a casing head disposed around casing for supporting and transferring weight of the casing string to the casing head. The slip type casing hanger assembly further includes (a) an adjustable isolation plate for sealing the annulus, further including a lower plate landing on a load shoulder, an upper plate adjoining the annulus, and a spacer separating the lower plate from the upper plates; (b) a plurality of fasteners for securing the spacer to the upper plate and the lower plate; (c) at least two slip segments, each comprising a plurality of teeth for engaging and suspend the casing string, with each slip segment having a top step and bottom step for engaging the hanger body; (d) at least one alignment ring for aligning the slip segments, and (e) locking apparatus for securing the isolation plate against the load shoulder.

Abstract: A connector for the connection of pressure vessels utilizing toroidal surfaces to achieve a maximum of contact area sliding parallel to motion of locking segment when achieving high preload to minimize high stress contact points and the resultant wear when subjected to multiple operations and orientation means to cause any wear to be repeatedly in the same area such that selected critical areas will not be subjected to high contact stress wear.

Abstract: A fitting for connecting two components is described. The fitting may be explosion proof for use in hazardous environments. The fitting may swivel allowing fast and easy connection to fixed components, thus minimizing the time required for installation and periodic maintenance, while maintaining the integrity of the explosion proof fitting. In this way, components—such as electrical conduits containing conductors or wires—can be installed and maintained without the use of damming material. Also described is a method of installing an explosion proof fitting for use in hazardous environments.

Abstract: A dog-style connector with a fail-safe mechanism for a marine riser system that connects a box portion and a pin portion of a riser. An actuator housing is affixed to an external surface of the box portion. The actuator housing has an outer bore and a threaded inner bore. An actuator body is threadably received in the inner bore. The actuator body has a hex head on its first end. The actuator body has a threaded fastener bore extending from the first end for receiving a threaded fastener. The actuator body has a second end that has a stem receptacle formed therein. The fastener bore is in communication with the stem receptacle. An actuator head, which includes a flange and a stem, is provided wherein the stem is positioned within the stem receptacle for sliding engagement therewith. Threads formed on the threaded fastener engage a threaded fastener receptacle formed in the stem of the actuator head.

Abstract: An expansion tube joint of the present invention comprises a first cylindrical body, a second cylindrical body inserted along an axis of the first cylindrical body, a seal member mounted between the first and second cylindrical bodies closer to an insertion port of the first cylindrical body, a lock mechanism provided at a position deeper than the seal member for restricting a relative movement range along the axis of the first and second cylindrical bodies, and a coming-out preventing member for preventing the seal member from coming out from the insertion port of the first cylindrical body, wherein after a member constituting the lock mechanism is mounted, the seal member can be mounted.

Abstract: A quick connector fitting assembly is provided which includes a fitting which releasably connects to a well casing for providing an interface for the attachment of various types of well related equipment. The quick connector fitting connects using fasteners to a lip or groove formed on the casing. The fasteners can easily connect or disconnect from the groove or lip facilitating the quick connection and disconnection of the fitting from the casing.

Abstract: A quick connector fitting assembly is provided which includes a fitting which releasably connects to a well casing for providing an interface for the attachment of various types of well related equipment. The quick connector fitting connects using fasteners to a lip or groove formed on the casing. The fasteners can easily connect or disconnect from the groove or lip facilitating the quick connection and disconnection of the fitting from the casing.

Abstract: A quick connector fitting assembly is provided which includes a fitting which releasably connects to a well casing for providing an interface for the attachment of various types of well related equipment. The quick connector fitting connects using fasteners to a lip or groove formed on the casing. The fasteners can easily connect or disconnect from the groove or lip facilitating the quick connection and disconnection of the fitting from the casing.