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| Number | Title | Issue Date |
| 7472755 | Method for inspection and repair of a flexible joint A method for servicing a component of a riser system, such as a flexible joint is disclosed. The riser system may be supported in a support apparatus such that the flexible joint and an adjoining section of riser are detached to allow for inspection, servicing, repa... | 01/06/2009 |
| 7426963 | Piggable flowline-riser system This invention relates to a flowline-riser production system for the recovery of hydrocarbons from offshore wells, and a method for pigging the interior surfaces of the riser and flowlines. More particularly, this invention is a piggable flowline-riser system in whi... | 09/23/2008 |
| 7331394 | Autonomous well intervention system A self-contained well intervention system which can be deployed from a lightweight vessel and coupled directly to a wellhead is described. The system includes valve means for providing a suitable well barrier and sealing the intervention system to allow an emergency... | 02/19/2008 |
| 7243729 | Subsea junction plate assembly running tool and method of installation The invention relates to a running tool for subsea junction plate assembly installation. The invention further relates to a method for installing a junction plate assembly using the running tool of the present invention. ... | 07/17/2007 |
| 7240736 | Drilling and producing deep water subsea wells Subsea wells are drilled and completed with an offshore floating platform in a manner that allows simultaneous work on more than one well. A first well is drilled and casing. Then a tubing hanger is run through a drilling riser and landed in the wellhead housing. Th... | 07/10/2007 |
| 7216699 | Sub mudline abandonment connector An inner tubular member of a subsea wellhead assembly carries a locking member that moves between a locked and unlocked positions lands within an outer tubular member having a grooved profile in its bore. The inner tubular member joins to a portion of the conductor ... | 05/15/2007 |
| 7082994 | Radially adjustable downhole devices and methods for same A method for logging a wellbore includes actuating a positioning device to adjust the position of a module relative to a reference point or object such as a wellbore axis or proximally positioned downhole device. With respect to a wellbore, an exemplary positioning ... | 08/01/2006 |
| 7055611 | Plug-dropping container for releasing a plug into a wellbore A plug-dropping container used for releasing plugs or other objects into a wellbore during fluid circulation procedures. In one aspect, the plug-dropping container is used as part of a cementing head. The plug-dropping container comprises an elongated housing, and a... | 06/06/2006 |
| 7036598 | Intervention module for a well The invention relates to an intervention module (18) for well intervention operations in preferably a pressurized subsea well (2) with a wellhead (4) disposed on a water floor. The intervention module (18) is provided with necessary equip... | 05/02/2006 |
| 6964304 | Technique for maintaining pressure integrity in a submersible system A technique for maintaining pressure integrity within a submersible system. The system utilizes a pressure housing with an internal component, such as a valve. The internal component is actuated by an external actuator via an actuator stem. A seal region is position... | 11/15/2005 |
| 6763890 | Modular coiled tubing system for drilling and production platforms A modular work system permits Rig Up time to be substantially reduced by reducing the number of crane lifts required to offload equipment for a transport boat or vehicle. This is achieved by developing transport skids capable of holding multiple system components. T... | 07/20/2004 |
| 6568875 | Connector intended for use with tension leg platform A connector in particular intended for use with a tension leg platform is disclosed. The connector comprises a male part (1) and a female part (2), which male part (1) is designed to engage in the female part (2) and the parts are able to engage with one ... | 05/27/2003 |
| 6550537 | Tension latching system A subsea wellhead with a tension latching system for a casing hanger or a tubing hanger, a tension latching system for hangers, and a method for adjusting the tension on a casing hanger or tubing hanger for subsea wells.... | 04/22/2003 |
| 6488093 | Deep water intervention system The well intervention system is a subsea deployed wire line, "stiff wire" (conventional wire-line located inside reeled tubing or embedded in the tubing wall), coil tubing, or reeled pipe unit landed on the existing subsea wellhead assembly or tree, where... | 12/03/2002 |
| 6367554 | Riser method and apparatus The riser system includes a small diameter riser that can be disconnected from the subsea BOP/wellhead assembly to obtain access to the wellbore for large diameter casing while continuously maintaining a hydrostatic head to control the well. The riser sys... | 04/09/2002 |
| 6336508 | Subsea, releasable bop funnel The invention is a device for eliminating the "tripping" of the BOP stack to the surface when switching between drilling and completion modes of operation on a drilling rig. This device is a new apparatus for attaching a BOP guide funnel, which will allow... | 01/08/2002 |
| 6325160 | Undersea drilling template release mechanism and method An undersea drilling template adapted to be lowered onto a seabed by a drillpipe. The template comprises a template base and at least one arm having a releasable clamping assembly for releasably connecting the template to the drillpipe. The clamping assem... | 12/04/2001 |
| 6293344 | Retainer valve An apparatus for retaining fluid in a pipe includes an elongated body adapted to be positioned within a subsea wellhead assembly. The elongated body has an end adapted for connection to the pipe, a flow passage for fluid communication with the pipe, and a... | 09/25/2001 |
| 6260624 | Internal production riser primary tieback An internal tieback connector for connecting a riser from a platform to a subsea wellhead having internal grooves and a casing hanger therein. The connector has an inner body which carries a lower housing adapted to land on the wellhead. A plurality of do... | 07/17/2001 |
| 6227300 | Slimbore subsea completion system and method A slimbore marine riser and BOP are provided for a subsea completion system which includes a tubing spool secured to a wellhead at the sea floor. The tubing spool has an internal landing profile for a reduced diameter tubing hanger which is arranged and d... | 05/08/2001 |
| 6182762 | Storm valve A method and apparatus for temporarily storing the lower portion of a string of drill pipe in a well which has a cased portion wherein a packer, installed between a storm valve located below the packer and an actuator located above the packer, is set in t... | 02/06/2001 |
| 6142233 | Tree running tool with actuator for latch A tree running tool is provided which has a means for actuating a latch for latching a side valve tree to a wellhead. Also disclosed is a tree running tool having an external axially movable actuator, preferably in the form of a sliding piston sleeve whic... | 11/07/2000 |
| 6131517 | Method and apparatus for removing abandoned offshore fixed platforms A method and apparatus for removing abandoned or obsolete fixed platforms in a marine environment is provided. The apparatus includes a frame carrying an explosive charge. The frame includes a linear and a curved section which are adjustable moved relativ... | 10/17/2000 |
| 6129149 | Wellhead connector A connector device for connecting a wellhead christmas tree assembly to a wellhead wherein the device comprises a cylindrical body adapted to be placed in sleeved relationship to the wellhead and having means for attaching a wellhead christmas tree assemb... | 10/10/2000 |
| 6102626 | Caisson wellhead system and method of installing the same A caisson wellhead system having a weak point wherein the wellhead system may be installed in a well as a single unit. The caisson wellhead system of the invention includes a lower tubular member having an upper rim. A lower rim of an upper tubular member... | 08/15/2000 |
| 6070668 | Blowout preventer spanner joint with emergency disconnect capability A spanner joint assembly for connecting between an upper riser and a conventional dual bore tubing hanger in a subsea well. The spanner joint assembly includes upper and lower spanner joint portions connected to each other through an emergency disconnect ... | 06/06/2000 |
| 6068427 | System and method for replacement of components on sea bottom-based installations A system and methods for diverless replacement of a functional component installed on a service unit on a sea bottom-based installation is provided. The component is fitted releasably into the service unit as an insert with an externally extending maneuve... | 05/30/2000 |
| 6032742 | Blowout preventer control system A blowout preventer control system has been developed with a pod with features which include a retractable internal stab with fixed internal hydraulic connection lines to the blowout preventer. The hydraulic connection lines are connected by pressure acti... | 03/07/2000 |
| 5984012 | Emergency recovery system for use in a subsea environment An emergency recovery system designed for use in a subsea environment is disclosed. The emergency recovery system has a casing that is open at each end with a shackle connected to one end of the casing with the opposite end of the shackle designed for con... | 11/16/1999 |
| 5582253 | Debris barrier with a downhole tool setting assembly An apparatus is disclosed to allow efficient setting and release from a liner packer connected to a liner assembly. The polished bore adjacent the packer is protected from debris since the setting procedure takes place while the polished bore remains prot... | 12/10/1996 |
| 5582252 | Hydrocarbon transport system A system for transporting hydrocarbon fluid produced from an offshore well using an offshore production platform and a hydrocarbon fluid storage space in fluid communication with the offshore well via a conduit is provided. The system comprises at least o... | 12/10/1996 |
| 5560436 | Single drilling guide base for subsea oil wells A single drilling guide base for subsea oil wells includes two parts, namely a lower part (1) and an upper part (2), which are bolted together (at 7). The whole arrangement is provided with a seating indicator (5) connected to the lower part and holes in ... | 10/01/1996 |
| 5419398 | Drive system for turning a swivel A system for turning a swivel aboard a vessel for oil extraction at sea includes a stationary swivel part connected to a rotary drilling rig on the vessel and one or more rotating parts connected to the vessel. The rotating swivel parts are connected to a... | 05/30/1995 |
| 5372198 | Abandonment of sub-sea wells A cased suspended sub-sea well is secured for abandonment by setting a packer in the casing thereof, the packer having a perforating gun suspended therefrom firing the gun to perforate the casing and then injecting cement into the annulus behind the casin... | 12/13/1994 |
| 5316089 | Method and apparatus for drilling a subsea well A method of drilling a subsea well involves partial drilling of several wells within a cluster. A base such as a template will have a receptacle. A gimbal mounts to a latching mechanism which in turn releasably latches an outer wellhead housing. The latch... | 05/31/1994 |
| 5213162 | Submarine wellhead A submarine wellhead (10) for producing wells, including a hollow body (14) mounted in a water-tight fashion on a well (16) configured to receive a suspension device (30) equipped with a production column (26) designed to be lowered down into the well, wh... | 05/25/1993 |
| 5161619 | Offshore pollution prevention during well work-over operations Environmentally-safe work-over operations are carried out on a well of an offshore platform by transporting an auxiliary oil-and-water separator together with well work-over equipment and installing it temporarily on the platform. The large volumes of oil... | 11/10/1992 |
| 5146990 | Anchoring structure for marine riser assembly An anchor system for temporarily anchoring the lower end of a lower marine riser package (LMRP) assembly, drilling riser, and drill string used in drilling subsea wells. The anchor system includes a dummy wellhead secured to the ocean floor and weight mea... | 09/15/1992 |
| 5088556 | Subsea well guide base running tool A running tool for use with a subsea well guide base when drilling from a floating drill ship is designed to be releasably detached without rotation so that the tool can be uncoupled at the surface upon completion of the guide base running procedure. The ... | 02/18/1992 |
| 5069287 | Retrievable guide base for subsea well A retrievable guide base and gimbal unit for a subsea well, and a tool for use with a pipe running to retrieve the guide base and gimbal from the subsea wellhead.... | 12/03/1991 |
