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| Number | Title | Issue Date |
| 7350562 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal r... | 04/01/2008 |
| 7159652 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal r... | 01/09/2007 |
| 7121345 | Subsea tubing hanger lockdown device A lockdown device for securing a tubing hanger to a production member comprises a lockdown member which is mounted on the production member and is movable into and out of engagement with a corresponding locking profile on the tubing hanger, and an actuating mechanis... | 10/17/2006 |
| 7063160 | Non-orienting tubing hanger system with a flow cage In a subsea wellhead assembly, a tubing hanger in communication with the subsea well has a hanger port extending through its side. A diverter surrounds the tubing hanger and diverts well fluid transmitted from the hanger port around a portion of the tubing hanger. T... | 06/20/2006 |
| 7032677 | Multi-lock adapters for independent screwed wellheads and methods of using same A lockdown flange for use with an independent screwed wellhead includes an annular body having a center passageway with an internal diameter at least as large as a passageway through the wellhead. The lock down flange may be used to construct a multi-lock adapter fo... | 04/25/2006 |
| 6918618 | Joining mechanism for PVC pipe The present invention relates to a PVC-pipe, axially-tensioned joint. The pipe joint comprises a first PVC pipe having a spigot end, wherein the spigot end has a circumferential groove in and circumferentially around the outer surface of the spigot end. An inner rin... | 07/19/2005 |
| 6905148 | Connector for securing conduits 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 w... | 06/14/2005 |
| 6609734 | Torus type connector 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 whe... | 08/26/2003 |
| 6554324 | Apparatus and method for connecting tubular members A connector for connecting a first tubular member to a second tubular member is disclosed, for example for connecting a riser to a wellhead in a subsea oilfield location. The second tubular member has a seating surface and comprises an engagable locking p... | 04/29/2003 |
| 6328343 | Riser dog screw with fail safe mechanism 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 thr... | 12/11/2001 |
| 5158326 | Casing head connector A pipe connector including a main body having a stepped bore in one end for telescopic insertion over the end of a pipe, creating a stepped annular area around the pipe. A slip retaining nut is threaded into the end of the main body around the pipe, closi... | 10/27/1992 |
| 4650225 | Hydraulic holddown screw with mechanical retention means A holddown screw assembly 10 which features a shaft 33, an energizer screw 39 and a detachable contact nose 20 adapted to be assembled in coaxial alignment in a radial bore in a wellhead structure. The shaft is provided with a passage 40 extending from it... | 03/17/1987 |
| 4646827 | Tubing anchor assembly A tubing anchor assembly for seating and supporting coiled tubing in a tubing head, which includes as a first element, a slip assembly characterized by multiple slip segments inserted in the slip bowl of the tubing head and each provided with a bevelled t... | 03/03/1987 |
| 4554971 | Tubing anchor assembly A tubing anchor assembly for seating and supporting coiled tubing in a tubing head, which includes as a first element, multiple slip segments inserted in the slip bowl of the tubing head and each provided with a vertically oriented dove tail slot, and as ... | 11/26/1985 |
| 4501441 | Tension hanger landing bowl A wellhead assembly having a wellhead member with an internal shoulder providing an upper outer shoulder and a lower inner seat, and a plurality of pins threaded therethrough and a landing bowl of arcuate segments connected and biased apart at their facin... | 02/26/1985 |
| 4190270 | Tubing hanger for temperature variations and extremes 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 an... | 02/26/1980 |
| 4130304 | Well head seal assembly An improved seal assembly for a well head including a ring-shaped seal body positioned in the tubing head, a tubular coupling formed to the seal body and adapted to connect between adjacent portions of inner tubing, a lower seal ring positioned in the tub... | 12/19/1978 |
