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| Number | Title | Issue Date |
| 8167031 | Blowout preventer with shearing blades The disclosure provides a blowout preventer (BOP) system with a ram having a shear blade with a shear blade profile to shear a tubular member disposed in the BOP. The shear blade profile can include a stress concentrator and centering shaped surface. The stress conc... | 05/01/2012 |
| 8162046 | Blowout preventer with shearing blades The disclosure provides a blowout preventer (BOP) system with a ram having a shear blade with a shear blade profile to shear a tubular member disposed in the BOP. The shear blade profile can include a stress concentrator and centering shaped surface. The stress conc... | 04/24/2012 |
| 7984758 | Multi-lock adapters for independent screwed wellheads and methods of using same A multi-lock adapter used to inject high-pressure well stimulation fluids through an independent screwed wellhead includes an adapter pin having a central passageway with an internal diameter at least as large as a passageway through the wellhead. A lockdown flange ... | 07/26/2011 |
| 7975761 | Method and device with biasing force for sealing a well Methods and devices with biasing force for sealing a well. Such a device is a blowout preventer has a body including a cavity having first and second recesses, a ram block configured to move inside the cavity, a top seat provided in the first recess and configured t... | 07/12/2011 |
| 7784536 | Packer insert for sealing on multiple items used in a wellbore A packer insert for sealing multiple items used in a wellbore includes an elastomeric member having one or more channels configured to seal on the multiple items when compressed by a packing unit, wherein the elastomeric member is made of a material selected from ru... | 08/31/2010 |
| 7588075 | Packer insert for sealing on multiple items used in a wellbore A packer insert for sealing multiple items used in a wellbore includes an elastomeric member having one or more channels configured to seal on the multiple items when compressed by a packing unit, wherein the elastomeric member is made of a material selected from ru... | 09/15/2009 |
| 7552765 | Wellhead blowout preventer with extended ram for sealing central bore A blowout preventer (BOP) is provided in which one of the BOP rams is formed with an extended central bore sealing section to seal across the central bore in a central bore closing position when the polish rod is not present. The ram bores of the BOP are sized to ac... | 06/30/2009 |
| 7500516 | System, method, and apparatus for accessing outlets in a two-stage diverter spool assembly A wellhead system diverter spool contains an internal sleeve that can be axially shifted internal to the spool with a handling tool. The sleeve permits access to outlets in the spool when required. When higher pressures are required, the internal sleeve is shifted d... | 03/10/2009 |
| 7464751 | High pressure adapter assembly for use on blow out preventers The high pressure adapter assembly for use in annular blow out preventers or other type BOPs has an upper and lower body with a bore that communicates between the upper and lower body; a top flange connected to the upper body for connection with a pressure control d... | 12/16/2008 |
| 7428931 | Multi-lock adapters for independent screwed wellheads and methods of using same A multi-lock adapter used to inject high-pressure well stimulation fluids through an independent screwed wellhead includes an adapter pin having a central passageway with an internal diameter at least as large as a passageway through the wellhead. A lockdown flange ... | 09/30/2008 |
| 7413019 | Mounts for blowout preventer bonnets A bonnet locking apparatus is disclosed. The bonnet locking apparatus includes a segmented radial lock disposed around a bonnet and configured to engage a corresponding radial lock disposed in a body of a blowout preventer, at least one spring configured to bias at ... | 08/19/2008 |
| 7410003 | Dual purpose blow out preventer An improved dual purpose blow out preventer (“BOP”) that provides both deployment and wellhead pressure containment functions. The dual purpose BOP may include four sets of rams including a set of seal/slip rams that provide bi-directional sealing being a first ... | 08/12/2008 |
| 7395866 | Method and apparatus for blow-out prevention in subsea drilling/completion systems A system and method for subsea drilling/completion. The system comprises a high-pressure riser extending from a semi-submersible platform to a subsea wellhead. A landing string extends along the insider of the riser, and has a surface blowout preventer and at least ... | 07/08/2008 |
| 7395867 | Hybrid wellhead system and method of use A hybrid wellhead system is assembled using a plurality of threaded unions, such as spanner nuts or hammer unions, for securing respective tubular heads and a flanged connection for securing a flow control stack to a top of a tubing head spool. The tubing head spool... | 07/08/2008 |
| 7389820 | Blowout preventer positioning system An embodiment of a blowout preventer system of the present invention includes a mast functionally connected a frame assembly and a carriage functionally connected to the mast. The carriage is adapted to carry and support a blowout preventer in a manner such that the... | 06/24/2008 |
| 7374146 | Dual-cylinder blowout preventer operator system A hydraulic blowout preventer operator comprises a first piston rod coupled to a closure member. The operator further comprises a first operator housing coupled to a bonnet and a head. The first piston rod extends through the bonnet into the first operator housing w... | 05/20/2008 |
| 7367396 | Blowout preventers and methods of use Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a ... | 05/06/2008 |
| 7357185 | Subsea tubing hanger assembly for an oil or gas well A subsea tubing hanger assembly is disclosed which comprises a tubing hanger (12) having a plurality of conduits (14). A pup joint (16) is connected to the hanger (12) and a shroud (20) surrounds the pup joint (16). A plural... | 04/15/2008 |
| 7357187 | BOP conversion apparatus A conversion apparatus comprising a first plate and a second plate. The first plate comprises at least one coupling mechanism, and the second plate comprises at least one coupling mechanism. The first plate is configured to couple with a blow-out preventer (BOP) bod... | 04/15/2008 |
| 7338027 | Fluid saving blowout preventer operator system A hydraulic blowout preventer operator comprises a piston rod having one end coupled to a closure member. The operator further comprises an operator housing having one end coupled to a bonnet and a second end coupled to a head. The piston rod extends through the bon... | 03/04/2008 |
| 7334634 | High pressure adaptor assembly for use on blow out preventors The high pressure adaptor assembly for use in an annular blow out preventers (BOP) or other type BOPs has an upper and lower body with a bore that communicates between the upper and lower body; a top flange connected to the upper body for connection with a pressure ... | 02/26/2008 |
| 7331562 | Blowout preventer with breech assembly A blowout preventer which, in certain aspects, has a main body with a main top, a main bottom, and a main bore therethrough from the main top to the main bottom, at least one breech assembly secured to the main body, ram apparatus movable within the breech assembly ... | 02/19/2008 |
| 7308934 | Fracturing isolation sleeve An apparatus operatively coupled to a well having a production casing positioned therein, the apparatus including a first device having and internal bore, a second device having an internal bore, and a fracture isolation sleeve disposed at least partially within the... | 12/18/2007 |
| 7300033 | Blowout preventer operator locking system A blowout preventer operator locking system comprises a piston rod having one end coupled to a closure member. The operator further comprises an operator housing having one end coupled to a bonnet and a second end coupled to a head. The piston rod extends through th... | 11/27/2007 |
| 7296631 | System and method for low-pressure well completion A low-pressure wellhead system with tubular heads and mandrels secured independently using threaded unions. A casing mandrel is secured to a wellhead by a first threaded union. Likewise, a tubing head spool is secured to the casing mandrel using a threaded union. A ... | 11/20/2007 |
| 7281586 | Mounts for blowout preventer bonnets A mount for a bonnet of a blowout preventer includes at least one support member coupled to a body of the blowout preventer, and a bonnet mounting member moveably coupled to the at least one support member and adapted to move substantially normal to a face of the bo... | 10/16/2007 |
| 7267180 | 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... | 09/11/2007 |
| 7258171 | Internal riser rotating control head A holding member provides for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing.... | 08/21/2007 |
| 7243713 | Shear/seal ram assembly for a ram-type blowout prevention system An improved shear/seal ram assembly used in ram-type BOPs is disclosed. The disclosed invention is a unique shear/seal ram assembly in which rail seal actuators attached to or integrally formed in a planar surface of one shear blade mate with and slide within corres... | 07/17/2007 |
| 7234530 | Ram BOP shear device A ram-type blowout preventer may include a body, a first ram block positioned within the body and having a first shearing element and a first sealing element, and a second ram block positioned within the body and opposing the first ram block, the second ram block ha... | 06/26/2007 |
| 7225873 | Coiled tubing cutter A cutting module to sever a tubing in a well includes a piston and shear blade. The piston includes at least two moveable telescoping elements, which are adapted to expand the first piston from a retracted length to an expanded length. The shear blade is connected t... | 06/05/2007 |
| 7207382 | Shearing sealing ram The present invention provides a method, apparatus, and system to shear a tubular member disposed in a well and seal the wellbore using a unique blade seal. In at least one embodiment, the blade seal is adapted to interface with opposing rams in a blowout preventer.... | 04/24/2007 |
| 7172029 | Bi-directionally boosting and internal pressure trapping packing element system The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a ... | 02/06/2007 |
| 7159669 | Internal riser rotating control head A holding member provides for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing.... | 01/09/2007 |
| 7150327 | Workover unit and method of utilizing same According to one embodiment of the invention, a method for wellbore production enhancement includes determining a location of a tubing connector of a tubing string having a plurality of tube sections, translating one or more slips downward to hold a position of the ... | 12/19/2006 |
| 7137453 | Remote operated actuator system for drill string internal blowout preventer An air swivel ring includes a non-rotating member having an air inlet, a rotating member having an air outlet, and a split seal having a first sealing surface and coupled to one of the non-rotating member and the rotating member so that the first sealing surface on ... | 11/21/2006 |
| 7121348 | Mounts for blowout preventer bonnets A mount for a bonnet of a blowout preventer includes at least one support member coupled to a body of the blowout preventer, and a bonnet mounting member moveably coupled to the at least one support member and adapted to move substantially normal to a face of the bo... | 10/17/2006 |
| 7096960 | Mounts for blowout preventer bonnets A mount for a bonnet of a blowout preventer includes at least one support member coupled to a body of the blowout preventer, and a bonnet mounting member moveably coupled to the at least one support member and adapted to move substantially normal to a face of the bo... | 08/29/2006 |
| 7090254 | Apparatus and method aligning tubulars In one aspect, an apparatus for aligning tubulars is provided, comprising at least one guide, a tong, and a backup unit, wherein the guide is arranged on or between the tong and the backup unit, and wherein the guide is, in use, movable towards and away from the tub... | 08/15/2006 |
| 7086467 | Coiled tubing cutter A subsea production system includes a blowout preventer stack that is adapted to seal and contain pressure in a well. The blowout preventer stack has a passageway through which a tubular string may extend into the well. The subsea production system includes a subsea... | 08/08/2006 |
