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| Number | Title | Issue Date |
| 8061428 | Non-orientated tubing hanger with full bore tree head A subsea wellhead assembly includes a wellhead housing, a production tree, a tubing hanger adapted to land in the wellhead assembly inside the wellhead housing without a need for angular orientation, a bridge member on the tubing hanger in the production tree, a por... | 11/22/2011 |
| 7740074 | Tree mounted well flow interface device A subsea production tree has an external annular profile formed on an upper portion of the tree. A vertical passage extending from a lower end of the tree to an upper end of the tree for communicating with a string of tubing extending into the well. A lateral passag... | 06/22/2010 |
| 7380835 | Single bore high flow junction plate Described herein a single bore, high flow junction plate and flow line assembly adapted for use subsea. This junction plate may be adapted for use with a torque tool manipulated by a remotely operated vehicle (“ROV”). ... | 06/03/2008 |
| 7270185 | Drilling system and method for controlling equivalent circulating density during drilling of wellbores A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit that passes through a subsea wellhead. Surface supplied drilling fluid flows through the tubing, discharges at the drill bit, returns to the wellhead through a wellbore annulus, and... | 09/18/2007 |
| 7234524 | Subsea chemical injection unit for additive injection and monitoring system for oilfield operations A system monitors and controls the injection of additives into formation fluids recovered through a subsea well. The system includes a chemical injection unit and a controller positioned at a remote subsea location. The injection unit uses a pump to supply one or mo... | 06/26/2007 |
| 7225877 | Subsea intervention fluid transfer system A system for subsea transfer of intervention fluids to a subsea intervention apparatus, the system, in certain aspects, including a structure and a frame pivotably mounted thereto, a plurality of frame fluid conduits on the frame for conducting fluid from a connecto... | 06/05/2007 |
| 7222674 | Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use A distributed function control module adapted for use in a modular blowout preventer (BOP) stack for use subsea comprises a housing, adapted to be manipulated by a remotely operated vehicle (ROV) with a stab portion adapted to be received into a BOP stack control mo... | 05/29/2007 |
| 7216715 | Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use A distributed function control module adapted for use in a modular blowout preventer (BOP) stack for use subsea comprises a housing, adapted to be manipulated by a remotely operated vehicle (ROV) with a stab portion adapted to be received into a BOP stack control mo... | 05/15/2007 |
| 7201229 | Tree mounted well flow interface device A subsea production tree has an external annular profile formed on an upper portion of the tree. A vertical passage extending from a lower end of the tree to an upper end of the tree for communicating with a string of tubing extending into the well. A lateral passag... | 04/10/2007 |
| 7165619 | Subsea intervention system, method and components thereof The subsea intervention system (SIM) includes a BOP module 10 and CT module 20. A tool positioning system 76 is used for positioning a selected subsea tool 22 stored within a rack 18 with a tool axis in line with the BOP axis, whil... | 01/23/2007 |
| 7165620 | Wellhead completion system having a horizontal control penetrator and method of using same A well completion system includes a completion device defining a bore therein attached to a wellhead and a tool, disposed within the bore, comprising an operational element and a control receptacle in communication with the operational element. The system further in... | 01/23/2007 |
| 7137451 | Controlling and/or testing a hydrocarbon production system A system for use in controlling and/or testing an underwater hydrocarbon production system, has a number of control modules for controlling well trees. The control modules are provided, not at the trees, but at a control center for location underwater. The trees are... | 11/21/2006 |
| 7112009 | Apparatus and method for horizontal subsea connection An apparatus for substantially horizontal connection of a conduit to a subsea structure: A frame connectable to and supportable by the subsea structure, the frame has a docking device operable to allow a horizontal connection device, including one of a remotely oper... | 09/26/2006 |
| 7086807 | Subsea connection apparatus Apparatus for connecting a conduit to a subsea structure includes a frame connectable to the subsea structure by a docking mechanism, a conduit handling mechanism on the frame to facilitate positioning of the conduit for attachment to the subsea structure and a seco... | 08/08/2006 |
| 7073593 | Method of drilling and operating a subsea well A method of preparing and operating a subsea well (23), comprising the steps of: locating a drill-through subsea tree (24) on a subsea wellhead; sealingly connecting a high pressure drilling riser (22) between the tree and a drilling platform at... | 07/11/2006 |
| 7048060 | Subsea system for processing fluid A subsea system for processing a fluid emanating from one or more subsea wells, comprising a fluid processing circuit and a base module (3) provided with at least one receiver (40) for receiving an insert module (4-8) comprising an applia... | 05/23/2006 |
| 7048058 | Subsea system for separating multiphase fluid A subsea system for separating a multiphase fluid emanating from one or more subsea wells, comprising a foundation structure (1) secured to the seabed, a header piping module (2) adapted to be mounted to the foundation structure (1), a separator... | 05/23/2006 |
| 7044228 | Flowline jumper for subsea well A subsea well system has a flowline jumper that extends between components on the sea floor. The jumper has connectors on each end for connecting to the two components and has a curved portion. At least a portion of the jumper is buoyant to cause it to assume a vert... | 05/16/2006 |
| 6997212 | Choke valve with temperature transmitter A choke valve useful for sub-sea application, having a valve body forming a bore extending therethrough which provides a body inlet, a body outlet and an insert chamber therebetween, and a removable insert assembly positioned in the insert chamber. The insert assemb... | 02/14/2006 |
| 6988553 | Horizontal spool tree wellhead system and method A horizontal spool tree wellhead system 10 utilizes a casing 18, 19 installed in a well bore and a wellhead housing 20 at the upper end of the casing. A spool 23 of the horizontal tree 22 is connected to the upper end of the wellhe... | 01/24/2006 |
| 6973244 | Cable with crevice corrosion protection The invention relates to a cable comprising at least two elongated elements chosen from a group consisting of steel tubes (1, 2), optical fibre cables (3), electrical cables (4), and combinations thereof, arranged side by side within a common ou... | 12/06/2005 |
| 6805200 | Horizontal spool tree wellhead system and method A horizontal spool tree wellhead system 10 utilizes a casing 18, 19 installed in a well bore and a wellhead housing 20 at the upper end of the casing. A spool 23 of the horizontal tree 22 is connected to the upper end of the wellhe... | 10/19/2004 |
| 6755254 | Horizontal spool tree assembly A horizontal spool tree assembly 10 is provided for supporting a production tubing string 22 within a well below a BOP. The spool body 12 includes a laterally extending passageway 36 which is in fluid communication with a similar laterall... | 06/29/2004 |
| 6708766 | Wellhead assembly for communicating with the casing hanger annulus A subsea wellhead assembly has the capabilities of communicating from the outer surface of an outer wellhead housing to a casing annulus. Seals between the outer and inner wellhead housings define an annular chamber when the inner wellhead housing lands. The outer w... | 03/23/2004 |
| 6698520 | Light-intervention subsea tree system A subsea well apparatus has features for controlling and monitoring production fluid flow from a well. A christmas tree lands on a subsea wellhead, the tree having a tubular, open upper end. A first flow passage extends from a lower end of the tree to the... | 03/02/2004 |
| 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 |
| 6540024 | Small diameter external production riser tieback connector A tieback connector includes a passive lower locking system and an active upper locking system to exert a positive locking force on the connection between a production riser and a high pressure wellhead. The tieback connector is composed of an outer housi... | 04/01/2003 |
| 6494267 | Wellhead assembly for accessing an annulus in a well and a method for its use A wellhead assembly comprises a central bore through the wellhead assembly having a pressure boundary region. A port is provided in the wellhead assembly having an opening in the central bore in the pressure boundary region of the wellhead assembly. The p... | 12/17/2002 |
| 6494266 | Controls bridge for flow completion systems A controls bridge for a flow completion system which comprises a tubing spool having a production outlet, a tubing hanger having a production bore that communicates with the production outlet and at least one service and control conduit extending therethr... | 12/17/2002 |
| 6460621 | Light-intervention subsea tree system A subsea well apparatus has features for controlling and monitoring production fluid flow from a well. A Christmas tree lands on a subsea wellhead, the tree having a tubular, open upper end. A first flow passage extends from a lower end of the tree to the... | 10/08/2002 |
| 6182761 | Flowline extendable pigging valve assembly An apparatus and a method for extending subsea hydrocarbon flowlines from an initial installation on a template/manifold system to later drilled subsea wells. The extension utilizes a pigging valve assembly which completes a flow path to allow for line cl... | 02/06/2001 |
| 6102124 | Flying lead workover interface system Flying lead hydraulic and electrical umbilical arrangements are disclosed for control of a subsea christmas tree for production and workover operations. Alternative arrangements for deep water ROV arrangements for a conventional christmas tree are illustr... | 08/15/2000 |
| 6098715 | Flowline connection system A flowline connection apparatus having a pivotally mounted funnel an upright frame, which is a permanent part of a subsea well installation such as a manifold or subsea production tree. The funnel rotates is rotatably mounted to rotate from a vertical pos... | 08/08/2000 |
| 6009950 | Subsea manifold stab with integral check valve A stab for a gas-lift injection line is disclosed which includes a built-in check valve to exclude seawater as the stab is being delivered to the subsea manifold. The check valve can be a spring-loaded poppet which can be pressure-balanced with the surrou... | 01/04/2000 |
| 5975803 | System and method for connecting together two assemblies which can move one with respect to the other, especially in underwater installations System and method for joining together two assemblies which can move one with respect to the other, especially in underwater installations, comprising a remote-operated vehicle (17) comprising propulsion means (21) and at least one equipment item (19, 20)... | 11/02/1999 |
| 5730551 | Subsea connector system and method for coupling subsea conduits A subsea connector system and method utilizing a skid (18) on the sea floor (F) four coupling a subsea conduit (16) carried by the skid (18) to a subsea conduit (12) on a relatively fixed subsea structure (10). A lift line device or structure (24) has an ... | 03/24/1998 |
| 5634671 | Riser connector There is disclosed a connector for releasably connecting tubular members connected to adjacent ends of riser pipes in end-to-end relation. The tubular members have locking grooves about their adjacent ends, and a split lock ring surrounds the adjacent end... | 06/03/1997 |
| 5501549 | Pulling and connecting tool for subsea conduits A tool for the remote-controlled pulling, aligning and connecting of a subsea conduit to a subsea installation. The tool includes a framework, a pulling wire with a pulling head which can be releasably attached to the end of the subsea conduit and also op... | 03/26/1996 |
| 5494110 | Two-part connector for fluid carrying conduits A two-part connector for use in connecting and disconnecting fluid carrying conduits includes male and female connector parts each having sets of non-radially disposed fluid carrying bores therethrough. A rotatable valve member extends across each set of ... | 02/27/1996 |
| 5377762 | Bore selector The bore selector includes a housing with an upper end having at least a first bore and a lower end with at least second and third bores. The housing includes a central bore extending between the upper and lower ends. A tube has its upper end connected to... | 01/03/1995 |
