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| Number | Title | Issue Date |
| 6609572 | Riser connector A system for connecting and disconnecting a lower end of a marine riser (25) to and from a blow out preventer stack on a subsea Wellhead comprises gripping members (26) for the marine riser and a lock element (27) for locking the gripping members (26). Th... | 08/26/2003 |
| 6568476 | Triggering mechanism for disconnecting a riser from a riser connector A triggering mechanism for a triggering valve (1) of a hydraulic emergency unlock circuit for unlocking hydraulically operated gripping members of a riser connector which connects a lower end of a riser (2) to a wellhead on a sea floor. The triggering mec... | 05/27/2003 |
| 6457749 | Lock assembly A lock assembly for locking an outer tubular element to an inner tubular element extending through the outer tubular element for holding loads between the tubular member when lowered downhole. The assembly includes a lock mandrel connected to one of the t... | 10/01/2002 |
| 6279962 | Safety joint The present invention relates to safety joints which permit separation of a downhole assembly at the location of the joint. The invention provides a safety joint characterized by the provision of auxiliary interconnecting means on a body (2) for interconn... | 08/28/2001 |
| 5941574 | Horizontal penetrator with multiple metal sealing pressure lines A coupler 10 for pressure conduits 12a-d comprises movable components 22, 26 selectively engageable with or disengageable from fixed components 34 to provide disconnectable sealed pressure connections therewith, the moveable components 22 being acted upon... | 08/24/1999 |
| 5685574 | Snap latch seal locator for sealingly latching tubing to a packer in a wellbore A latch is adapted to be connected to a tubing string and will snap into a packer disposed in a wellbore. A predetermined first number of pounds is required to snap the latch into the packer and a predetermined second number of pounds, greater than the fi... | 11/11/1997 |
| 5482331 | Quick connect coupling device A quick connect coupler for interconnecting pressure sealed housings with pin and socket members where the socket member has a sealing bore and locking grooves. The pin member has a first rotatable ring assembly and a second rotatable ring assembly is mou... | 01/09/1996 |
| 5400857 | Oilfield tubular shear ram and method for blowout prevention A ram assembly for positioning within a through bore of a blowout preventer body includes first and second opposing ram pistons each powering a respective knife blade. Each knife blade may have a pair of angled shear edges on opposite sides of the respect... | 03/28/1995 |
| 5160172 | Threaded latch ring tubular connector A tubular connector joint has a pin member on one of the tubular members and a box member on the other of the tubular members. External pin threads are formed on the exterior of the pin member. Internal box threads have the same pitch as the pin threads. ... | 11/03/1992 |
| 5020593 | Latch ring for connecting tubular members A device for releasably locking an inner member within the bore of a tubular outer member holds load in upward and downward directions. The inner member has a grooved profile on its exterior. The outer member has a grooved profile in its bore. A split lat... | 06/04/1991 |
| 4844510 | Tubular connector A ratcheting connector for providing a radial connection between two concentric tubular members, with one of the members having a recess in which a split latching ring is mounted with coarse threaded engagement between said split latching ring and said on... | 07/04/1989 |
| 4728124 | Connection for drilling The invention relates to a safety connection for drilling purposes, especially for oil wells. The connection comprises two portions (1,2) which, during normal drilling, transmit the torque and the thrust required for the tool to operate, said torque and t... | 03/01/1988 |
| 4648444 | Tensile ring cable head assembly A weak point element for a cable head comprising a tubular ring having a circumferentially extending zone of reduced tensile strength between the ends thereof. Novel cable head assemblies which substantially isolate the weak point element from other than ... | 03/10/1987 |
| 4531766 | Releasable couplings for drill strings A releasable coupling or safety sub for a drill string including an inner tubular member piloted within an outer tubular member, the inner member including expansible, segmental lock members shiftable laterally of the tubular members into locking engageme... | 07/30/1985 |
| 4452472 | Tubular safety joint for drill strings A releasable coupling or safety sub for a drill string including an inner tubular member piloted within an outer tubular member, the inner member including expansible lock members shiftable laterally of the tubular member into locking engagement with a tr... | 06/05/1984 |
| 4364587 | Safety joint For use in a drilling string including drill collars, a safety joint which enables the string of drill pipe to be unthreaded from the drill collars at the safety joint is disclosed. A safety joint utilizes a collet telescoped within and threaded to an out... | 12/21/1982 |
| 4289202 | Well tubing coupling apparatus Well tubing coupling apparatus of the tubing seal divider type adapted for remote hydraulic release control to permit a tubing string including well tools above a packer to be removed for servicing from a lower tubing string extending through a packer whi... | 09/15/1981 |
| 4281858 | Selectively bridged expansion joint This invention relates to a selectively telescopable joint carryable in a tubular conduit having upper and lower conduit members which are extendable within a subterranean oil or gas well. The apparatus comprises an outer cylindrical housing with an inner... | 08/04/1981 |
| 4185856 | Pipe joint with remotely operable latch First and second pipes supported substantially vertically in a subsea location with a breech block connector connecting the pipes together, the said breech block connector comprising male and female elements, one of which has longitudinally extending circ... | 01/29/1980 |
| 4161216 | Mechanical latch with hydraulic locking mechanism An apparatus is provided for selective mechanically activated latching and fluid activated locking and unlocking of a tubular string within an anchor assembly in a subterranean bore, wherein the anchor assembly has defined thereon co-engaging elements for... | 07/17/1979 |
| 4138148 | Split-ring riser latch A latching and unlatching system for connecting a riser pipe to the casing in a subsea well. A split-circumferential ring fits into mating grooves in the male end of the casing and the female end of the riser. A releasing tool runs on a drill pipe suspend... | 02/06/1979 |
| 3931670 | Apparatus and method for connecting two axially spaced apart pipes A releasable pull plug arranged for mounting inside the end of one of the pipes or conduits with the plug having clips for disengageably engaging the internal surface of one of the conduits and locking the plug against axial movement relative thereto. A l... | 01/13/1976 |
