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| Number | Title | Issue Date |
| 8393399 | Blowout preventer with intervention, workover control system functionality and method System and method for controlling a blowout preventer (BOP) stack and a tree attached to a wellhead of a well. The system includes at least a MUX pod configured to receive electrical signals and a fluid under pressure, and to provide a first set of functions to the ... | 03/12/2013 |
| 8122965 | Methods for development of an offshore oil and gas field Methods for developing an offshore field comprising deploying a lead drilling and production vessel to a offshore field to drill and complete at least one well. Production from the at least one well is initiated and evaluated. A secondary production vessel is select... | 02/28/2012 |
| 8047296 | Method of transitioning to kinetic hydrate inhibitors in multiple tie-in well systems The technical challenges for a smooth transition between using both a thermodynamic hydrate inhibitor (THI) and a kinetic hydrate inhibitor (KHI) to simply using only the KHI in multiple tie-in gas natural gas production systems is solved by adding more THI in a fir... | 11/01/2011 |
| 7958938 | System and vessel for supporting offshore fields A system for supporting multiple-well-site, offshore, hydrocarbon-bearing fields, each well-site has one or more wells. In general, the system first comprises a floating vessel that is relocatable from a first subsea well-site to a second subsea well-site. The syste... | 06/14/2011 |
| 7931090 | System and method for controlling subsea wells A technique is provided for control of subsea well systems. The technique utilizes a subsea controller coupled to a plurality of subsea well system components to allow localized control of the subsea well system. The subsea controller can be used in a variety of fun... | 04/26/2011 |
| 7921919 | Subsea well control system and method A system comprising a surface installation in position above a plurality of subsea wells disposed within the watch circle of the surface installation. A plurality of flowlines directly couple at least one of the plurality of subsea wells to the surface installation.... | 04/12/2011 |
| 7793724 | Subsea manifold system An improved subsea manifold system that is capable of being used in an early production system for producing hydrocarbons from a plurality of wells from a common riser system. The subsea manifold is able to control the fluid from a multiple of subsea wet-tree wells ... | 09/14/2010 |
| 7793725 | Method for preventing overpressure The present invention relates to overpressure protection systems and methods for use on a production system for transferring hydrocarbons from a well on the seafloor to a vessel floating on the surface of the sea. The production system includes a subsea well in flui... | 09/14/2010 |
| 7721807 | Method for managing hydrates in subsea production line A method for managing hydrates in a subsea production system is provided. The system has at least one producing subsea well, a jumper for delivering produced fluids from the subsea well to a manifold, a production line for delivering produced fluids to a production ... | 05/25/2010 |
| 7422066 | System for direct vertical connection between contiguous subsea equipment and method of installation of said connection A system for the direct vertical connection between contiguous sub sea equipment is described, having one or more hydrocarbon flow and/or control interconnection between same, so as to dispense with the use of connecting jumpers. One mode of said system comprises a ... | 09/09/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7350578 | Diverter plugs for use in well bores and associated methods of use Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a... | 04/01/2008 |
| 7347271 | Wireless communications associated with a wellbore A subsea communication system includes devices in a wellbore and devices on a floor, where the devices in the wellbore and on the floor are able to communicate wirelessly with each other, such as through a formation. ... | 03/25/2008 |
| 7318480 | Tubing running equipment for offshore rig with surface blowout preventer A method performing an operation in a subsea wellhead assembly through a riser extending between the wellhead assembly and a surface platform includes the step of connecting a surface blowout preventer to an upper portion of the riser. Then a tool is connected to a ... | 01/15/2008 |
| 7314084 | Subsea pumping module system and installation method The present invention contemplates a system comprising a pumping module coupled to an intermediate flow inlet (IFI) wherein said IFI is coupled to a base structure disposed on the flow line that routes production from one or more oil wells, allowing for the quick an... | 01/01/2008 |
| 7249634 | Apparatus for production in oil wells An apparatus uses at least one injection pump (9) positioned in proximity to an undersea petroleum well (10) to provide hydraulic fluid for hydraulic pumping equipment positioned in the bottom of the well, in order to cause a flow of produced oil. The ... | 07/31/2007 |
| 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 |
| 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 |
| 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 |
| 7219741 | Tubing annulus valve A subsea wellhead assembly has a tubing hanger with a tubing annulus passage and a production passage. A metal-sealing shuttle valve is mounted in the tubing hanger for blocking upward flow through the tubing annulus passage. The shuttle valve has a retention mechan... | 05/22/2007 |
| 7219740 | Well production and multi-purpose intervention access hub A well production and multi-purpose intervention access hub for flowing fluids from multiple wells to a host facility through a flowline. The hub comprises a production header module and a flowline header module configured for fluid communication with the flowline. ... | 05/22/2007 |
| 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 |
| 7213644 | Cavity positioning tool and method In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ... | 05/08/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7207390 | Method and system for lining multilateral wells In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w... | 04/24/2007 |
| 7190093 | Modular automation device including control and power units An automation device includes a modular assembly with a primary group configured for use with a hardware element. The primary group includes a controller providing signals. A feeder unit provides power to automated units. A primary first link connects the input/outp... | 03/13/2007 |
| 7178592 | Closed loop multiphase underbalanced drilling process The present invention provides apparatus and methods for handling fluids returning from a well. The fluids are introduced into a separator and a separated gas stream is recovered or recycled. The gas stream may comprise more than one phase. The separated gas stream ... | 02/20/2007 |
| 7163063 | Method and system for extraction of resources from a subterranean well bore A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo... | 01/16/2007 |
| 7150325 | ROV retrievable sea floor pump A subsea pumping assembly locates on a seafloor for pumping well fluid from subsea wells to the level. The pumping assembly has a tubular outer housing that is at least partially embedded in the seafloor. A tubular primary housing locates in the outer housing and ha... | 12/19/2006 |
| 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 |
| 7108069 | Online thermal and watercut management A system, method, and software for optimizing the commingling of well fluids from a plurality of producing subsea wells. The mixing temperature and water content in each header of a collection manifold are calculated for each subsea well and header combinations, res... | 09/19/2006 |
| 7100687 | Multi-purpose well bores and method for accessing a subterranean zone from the surface A well system includes at least two well bores extending from a surface to a subterranean zone. Each of the two well bores is used to form a well bore pattern for the subterranean zone that intersects the other well bore and transports fluid from the subterranean zo... | 09/05/2006 |
| 7090009 | Three-dimensional well system for accessing subterranean zones In accordance with one embodiment of the present invention, a method is provided for accessing a plurality of subterranean zones from the surface. The method includes forming an entry well from the surface. Two or more exterior drainage wells from the entry well thr... | 08/15/2006 |
| 7083004 | Cantilevered multi purpose tower and method for installing drilling equipment A drilling rig having a deck capable of being used offshore and a method for commissioning a well using the drilling rig and a method for decommissioning a well using the drilling rig, wherein the drilling rig comprises: a cantilever which is mounted so as to be mov... | 08/01/2006 |
| 7073595 | Method and system for controlling pressure in a dual well system A method for controlling pressure of a dual well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone using a drill string. The articulated w... | 07/11/2006 |
| 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 |
| 7069992 | Mono-trip cement thru completion In systems and methods for production of hydrocarbons fluids from a formation surrounding a wellbore, a production assembly is cemented into place, and excess cement is then cleaned from the production tubing and liner. Thereafter, hydrocarbon fluids are produced an... | 07/04/2006 |
| 7066267 | Downhole tubular splitter assembly and method A splitter assembly 10 is positioned downhole within a conductor 50 for separating two or more tubular strings placed within the conductor. A splitter housing may include a first bore 26 and a second bore 28 for separating a first well fr... | 06/27/2006 |
| 7063158 | Bottom tensioned offshore oil well production riser An offshore oil well riser system comprises one or more tubular conduits suspended from a floating platform and having bottom ends extending downward substantially vertically toward the sea floor. A bottom end connection and tensioning assembly is disposed at the bo... | 06/20/2006 |
| 7055623 | Method for the drilling of the initial phase of deep water oil wells with an underwater well head Improved method for the drilling of the initial phase of deep water oil wells with an underwater well head consisting in the positioning and cementation of the conductor pipe and anchorage casing by means of a single drilling phase. A tapered hole (with a double dia... | 06/06/2006 |
