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| Number | Title | Issue Date |
| 7416226 | Spring-biased pin connection system A system for connecting a stripper rubber to drilling head equipment comprises an adapter, a stripper rubber insert and a pin assembly. The adapter includes a primary bore, a groove extending around the primary bore, drill head equipment engaging structure adjacent ... | 08/26/2008 |
| 7360601 | Submersible well pump installation procedure A method of installing an electrical pump assembly in a subsea wellhead member avoids having to run the pump assembly through the wellhead member after removing the wear bushing. The operator first lowers the pump assembly on a string of tubing at least through the ... | 04/22/2008 |
| 7350562 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal r... | 04/01/2008 |
| 7334633 | Stripper rubber adapter A connector is provided for selectively connecting or disconnecting a stripper rubber to or from drilling head equipment such as a bearing assembly. A generally cylindrical adapter connected to the equipment defines a primary bore accommodate a down hole tubular. On... | 02/26/2008 |
| 7314085 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree (34) in which a tubing hanger (54) is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, includin... | 01/01/2008 |
| 7284616 | Selectively retrievable wear bushing for subsea or surface applications The present invention is directed to an assembly for installing and selectively retrieving a wear bushing in the bore of a subsea or surface wellhead. The assembly includes a bit sub, which is adapted for attachment to a drill string, a drill string adapter removabl... | 10/23/2007 |
| 7278490 | Blast joint swivel for wellhead isolation tool and method of using same A blast joint swivel for use in a wellhead isolation tool includes a blast joint hanger mounted to a top of the wellhead isolation tool and a swivel body rotatably received in the blast joint hanger. The swivel body threadedly connects to a blast joint, which in tur... | 10/09/2007 |
| 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 |
| 7243733 | Cup tool for a high-pressure mandrel and method of using same A cup tool includes a cup tool tube having a threaded upper end for connection to a high-pressure mandrel. The cup tool has an outer surface over which an elastomeric cup is slidably mounted for movement from an unset position for entry into a wellbore to a set posi... | 07/17/2007 |
| 7243958 | Spring-biased pin connection system A connection system is described for connecting parts of an apparatus. A first part having one or more pin receptacles cooperatively mates to a second part housing one or more spring-biased pin assemblies to provide a fluid-tight seal. The second part further provid... | 07/17/2007 |
| 7237615 | Casing mandrel with well stimulation tool and tubing head spool for use with the casing mandrel A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubin... | 07/03/2007 |
| 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 |
| 7210525 | Apparatus for controlling a tool having a mandrel that must be stroked into or out of a well An apparatus for controlling vertical movement of a tubular within a wellhead includes an anchor spool connected atop the wellhead, and a detachable superstructure supporting the tubular. The anchor spool provides connectors for detachably connecting bottom ends of ... | 05/01/2007 |
| 7174956 | Stripper rubber adapter A connector is provided for selectively connecting or disconnecting a stripper rubber to or from drilling head equipment such as a bearing assembly. A generally cylindrical adapter connected to the equipment defines a primary bore to accommodate a down hole tubular.... | 02/13/2007 |
| 7168495 | Casing-engaging well tree isolation tool and method of use A casing-engaging wellhead isolation and method of the tool protects wellheads from lifting pressures induced by high fluid pressures and high flow rates used to stimulate low pressure wells. A releasable packer assembly mounted to a bottom end of a mandrel of the t... | 01/30/2007 |
| 7159652 | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal r... | 01/09/2007 |
| 7117945 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree (34) in which a tubing hanger (54) is landed at a predetermined angular orientation As the tubing string can be pulled without disturbing the tree, many advantages follow, including... | 10/10/2006 |
| 7069987 | Casing adapter tool for well servicing The invention provides a casing adapter tool which connects and seals to a casing pipe at its lower end and to production or service equipment at its upper end, and is used with well servicing equipment, such as is involved in fracturing. The casing adapter tool inc... | 07/04/2006 |
| 7066269 | Casing mandrel with well stimulation tool and tubing head spool for use with the casing mandrel A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubin... | 06/27/2006 |
| 7055632 | Well stimulation tool and method for inserting a backpressure plug through a mandrel of the tool A well stimulation tool includes a well stimulation tool mandrel with an axial bore having an internal diameter large enough to permit a backpressure plug to be run through the mandrel into a tubing mandrel, such as a tubing hanger or a casing mandrel, to which the ... | 06/06/2006 |
| 6966381 | Drill-through spool body sleeve assembly A drill-through spool body sleeve assembly comprises a test sleeve removably installed within a drill-through spool body having a bore with the terminal ends of the outer diameter of the test sleeve sealingly engaging the bore wall. The sleeve assembly also comprise... | 11/22/2005 |
| 6945325 | Run and retrieval wear bushing and tool A wear bushing has a lower portion that is landed on a casing hanger in a wellhead housing. The wear bushing is mounted to the running tool, which is joined to a drill string. With running-in keys locked on the tool, the wear bushing is lowered down the well into th... | 09/20/2005 |
| 6918439 | Backpressure adaptor pin and methods of use A tubing assembly including a tubing string and tubing hanger provides a fluid passage with backpressure threads for securing a backpressure plug in a fluid-tight seal below the tubing hanger, so that the tubing hanger can be removed from the tubing string. The back... | 07/19/2005 |
| 6749018 | Bit run and retrieval wear bushing and tool A wear bushing has a lower portion that is landed on a casing hanger in a wellhead housing. An upper portion of the wear bushing has a shear ring in a locking profile that locks the wear bushing to the casing hanger. A locking ring resides in a bore of the wear bush... | 06/15/2004 |
| 6736207 | Internal blow-out preventer change-out tool A device for use in removing and installing an inline component from a drill string that is depending downward over a deck. The device has an elongate member with a flange adapted to abut the deck and support the elongate member in a substantially upright orientatio... | 05/18/2004 |
| 6719044 | Wear bushing running and retrieval tools Devices and methods for selectively emplacing a wear bushing in a wellhead housing and removing it therefrom. A drill string-mounted running tool is used to selectively engage the wear bushing during emplacement and removal. The wear bushing need not be removed each... | 04/13/2004 |
| 6719059 | Plug installation system for deep water subsea wells A plug retrieval and installation tool is used with a subsea well having a production tree, a tubing hanger, a passage that extends vertically through the tubing hanger and the tree, and a plug located within a plug profile in the passage within the tubing hanger. T... | 04/13/2004 |
| 6470965 | Device for introducing a high pressure fluid into well head components A device for introducing high-pressure fluid through a well having a vertical passage with at least one valve and into a well having a well tubing into said vertical passage, has a lower part removably attachable to the well tubing, a hollow mandrel adapt... | 10/29/2002 |
| 6439302 | Stripper packer A stripper packer includes a main body having a first end and a second end. A passage extends through the main body from the first end to the second end, thereby facilitating the passage of coiled tubing through the main body when the coiled tubing is bei... | 08/27/2002 |
| 6220363 | Wellhead isolation tool and method of using same A wellhead isolation tool permitting a high fluid flow rate during a well treatment to stimulate production is described. The wellhead isolation tool includes a mandrel to be inserted into a wellhead. The mandrel is sealed in a tubing hanger above back pr... | 04/24/2001 |
| 6209652 | Deployment system method and apparatus for running bottomhole assemblies in wells, particularly applicable to coiled tubing operations A deployment system and apparatus for running bottomhole assemblies and/or downhole tools in wells, particularly applicable to coiled tubing operations, including pressurized deployment apparatus, a pressure operated connector tool and a multi-functional ... | 04/03/2001 |
| 5996695 | Method and apparatus for sealing between casing and wellhead connector structure A method and apparatus for installing a metal annular seal (54) between the outer rough surface of a casing member (11) which has had a portion thereof cutaway with a remaining portion projecting upwardly from the upper end of a casing head (12). A slip i... | 12/07/1999 |
| 5927403 | Apparatus for increasing the flow of production stimulation fluids through a wellhead An apparatus for increasing the transfer rate of production stimulation fluids through a wellhead of a hydrocarbon well is disclosed. The apparatus includes a mandrel for a wellhead isolation tool and a tubing hanger for use in conjunction with the mandre... | 07/27/1999 |
| 5893417 | Wireline lubrication wiper A method and apparatus for preventing leakage and spillage of oil from a wireline lubricator when the lubricator is disconnected from an oil and/or gas well including a generally cylindrical hollow coupling assembly adapted for connection to the bottom of... | 04/13/1999 |
| 5762136 | Wear bushing lockdown and method of inserting In this invention, a wear bushing has a lower tubular portion and an upper tubular portion. The lower portion has fingers on its upper end. The upper portion has a conical lower end that slides within the inner sides of the fingers. For running-in, the up... | 06/09/1998 |
| 5706892 | Downhole tools for production well control A plurality of electronically controlled downhole tools and systems for use in production wells is presented. These tools and systems include safety valve and pressure monitoring systems, remotely controlled inflation/deflation devices, remotely actuated ... | 01/13/1998 |
| 5682952 | Extendable casing circulator and method A casing circulator 30, 54, 162 is provided for pumping fluid into a casing string to fill the casing string, and for temporarily sealing with an upper end of the casing string to circulate pressurized fluid through the casing string. The casing circulato... | 11/04/1997 |
| 5611398 | Two-piece drilling flange This invention relates to a two-piece drilling flange which allows for the full engagement of a conventional casing head external thread (8-round thread) reducing thread wear. The two-piece drilling flange incorporates a flange-bushing piece and a drillin... | 03/18/1997 |
| 5566753 | Stripper/packer A stripper/packer for use in a stack at a well head provides horizontal actuation and side access. This configuration enables maintenance of the packer in place. It also provides for the retraction of the packer to a diameter greater than the inside diame... | 10/22/1996 |
| 5421407 | Wellhead load support ring A tubing hanger (2) is suspended in a spool (1) by a composite load support ring (7,8). Upon running-in, the hanger expands the ring into engagement with complementary grooves (34) in the spool wall. By making the load support ring from individual split r... | 06/06/1995 |
