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| Number | Title | Issue Date |
| 8066063 | Capillary injector A mineral extraction system includes a branch having a branch passage, a diverter coupled to the branch passage, and a capillary injection conduit disposed inside to the branch passage. A method of injecting chemicals includes injecting a chemical into a capillary i... | 11/29/2011 |
| 7409995 | Apparatus and method for washing tubular conduits during trip out of a conduit string from within a subterranean well An apparatus for washing undesirable matter off of the exterior of tubular conduits forming a conduit string during trip out of the conduit string within a subterranean well. The tubular conduits may be drill or workover pipe, or the like. A cylindrical housing has ... | 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 |
| 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 |
| 7314086 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 01/01/2008 |
| 7308943 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 12/18/2007 |
| 7225876 | Connector assembly A reciprocable connector assembly for coupling a service line through a path in a wellhead and hangar wall, the assembly comprising: connector for coupling with a corresponding connector disposed in the hangar wall; a shuttle carrying said connector between a first ... | 06/05/2007 |
| 7213660 | Washpipe seal A controlled leakage seal assembly having a first stationary portion adapted to be connected in substantially fluid-tight relation to a source of drilling fluid and a second portion adapted to be connected in substantially fluid-tight relation to a rotary portion in... | 05/08/2007 |
| 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 |
| 7124828 | Apparatus for retaining two strings of tubulars An apparatus for retaining two strings of tubulars characterized in that the apparatus comprises body parts of a device for retaining a single string of tubulars and a converting member. A device for retaining a string of tubulars, the device comprising at least one... | 10/24/2006 |
| 7111687 | Recovery of production fluids from an oil or gas well A method and assembly for recovering fluids from, or injecting fluids into, a well having a christmas tree; the fluids typically flow between first and second flowpaths in a continuous path. The assembly may be located within the main bore, or a side passage of the ... | 09/26/2006 |
| 7093660 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 08/22/2006 |
| 7040408 | Flowhead and method A flowhead for a well testing system is disclosed. The well testing system comprises a plurality of threaded connection pipes extending from the surface to a subterranean zone of interest which is isolated for testing purposes. Fluid flows from the subterranean zone... | 05/09/2006 |
| 6991039 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 01/31/2006 |
| 6942028 | Slim-bore tubing hanger A subsea wellhead assembly has a wellhead housing at the upper end of the well. The wellhead housing supports one or more strings of casing, each having a casing hanger. A tubing spool connects to the upper end of the wellhead housing. The tubing spool has a landing... | 09/13/2005 |
| 6923254 | Washpipe apparatus Methods and apparatus for providing enhanced seal life of a swivel seal assembly by decreasing the effective differential pressure across a given rotating seal. The differential pressure is decreased by providing a pressurized fluid on the low-pressure side of the s... | 08/02/2005 |
| 6871708 | Cuttings injection and annulus remediation systems for wellheads A wellhead assembly has an inner wellhead that lands in an outer wellhead, the inner wellhead having first and second internal passages. Each passage has an upper opening at the outer surface of the inner housing and a lower opening at the inner surface. An external... | 03/29/2005 |
| 6736208 | Wellhead production pumping tree with access port In an integral production pumping tree, the bottom connection, blow-out preventer, flow tee and top connection are positioned to one side, with the vertical rod bore off-center. Up to three vertical ports are provided in the other side of the tree, for providing acc... | 05/18/2004 |
| 6675900 | Crossover tree system A subterranean oil or gas well apparatus is provided. The apparatus includes a single-bore production tubing hanger arranged concentric with a wellhead. The tubing hanger includes a plurality of ports and channels arranged about the tubing hanger to give ... | 01/13/2004 |
| 6637514 | Recovery of production fluids from an oil or gas well A method and assembly for recovering production fluids from a well having a tree, using a conduit which is inserted into a production bore to divert the recovered fluids via chemical treatment, pumping or any other apparatus with minimal reduction in the ... | 10/28/2003 |
| 6634427 | Drill string section with internal passage Drill string sections are provided comprising internal passages that may be used to facilitate the electrical or hydraulic connection of multiple devices, such as sensors, arranged at spaced apart positions along the length of the drill sections. Methods ... | 10/21/2003 |
| 6598680 | Subsea wellhead equipment A wellhead apparatus which includes a spool for use in a horizontal tree and having a vertical bore therethrough, and a tubing hanger adapted to be lowered into and landed within the bore of the spool to suspend a tubing string on the lower end of the tub... | 07/29/2003 |
| 6595279 | Data line deployment in hydrocarbon wells A preferably fiber optic line passes into a well interior through a pressure barrier such as a tree or wellhead housing, via a modified horizontal penetrator assembly. The penetrator assembly comprises double poppet valve assemblies arranged to open upon ... | 07/22/2003 |
| 6547008 | 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 a... | 04/15/2003 |
| 6516876 | Running tool for soft landing a tubing hanger in a wellhead housing A running tool for a wellhead has an outer sleeve, a piston, an inner sleeve, each with respective hydraulic chambers, and a pair of collets for engaging a tubing hanger in a wellhead. Pressure is applied to the various chambers to actuate the collets and... | 02/11/2003 |
| 6470971 | Tubing head control and pressure monitor device A tubing hanger and wellhead have features for controlling and monitoring fluid pressure to downhole equipment. The tubing hanger has an internal vertical passage. A hydraulic line connects to the lower end of the vertical passage and runs downhole. The v... | 10/29/2002 |
| 6457530 | Wellhead production pumping tree A monolithic pumping tree combining a bottom connection, production blow-out preventer section, flow tee section and top connection is cast so as to provide an access port extending downwardly through the side wall of the tree from its outer surface, to c... | 10/01/2002 |
| 6378613 | Large bore subsea Christmas tree and tubing hanger system A concentric tubing hanger having a radially offset tubing annulus passage closeable by a remotely operable valve, preferably a pressure balanced, hydraulically-operated shuttle valve positioned at an upper end of the tubing annulus passage. The tubing ha... | 04/30/2002 |
| 6302212 | Tubing hanger and tree with horizontal flow and annulus ports A well production assembly includes a production tree which has a lateral production passage extending laterally from a vertical bore of the tree. A tubing hanger, also having a lateral production passage, lands in the tree, with the lateral passages regi... | 10/16/2001 |
| 6244348 | Well production system with a hydraulically operated safety valve A tubular wellhead member has an inner seal surface. A hydraulic passage extends through the wellhead member and terminates at a port at the seal surface. A tubing hanger having an outer mating surface lands in the wellhead member. A hydraulic line extend... | 06/12/2001 |
| 6237685 | Bolt-on well adapter Secured to an exterior surface of a well casing having an aperture formed therein is a first unit including a horizontal fluid passage receiving a horizontal pipe and extending through a generally annular seat in registration with the aperture. A second u... | 05/29/2001 |
| 6062314 | Tubing hanger and tree with horizontal flow and annulus ports A well production assembly includes a production tree which has a lateral production passage extending laterally from a vertical bore of the tree. A tubing hanger, also having a lateral production passage, lands in the tree, with the lateral passages regi... | 05/16/2000 |
| 6050339 | Annulus porting of horizontal tree A horizontal tree has a vertical bore and a horizontal production passage and is landed in a wellhead housing. A tubing hanger lands in the bore and has a vertical passage and a horizontal passage that aligns with that of the tree. A retrievable first plu... | 04/18/2000 |
| 6039119 | Completion 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 a... | 03/21/2000 |
| 5992527 | Wellhead assembly A wellhead assembly in which an in-line tree (10) is landed within a wellhead housing (3). The in-line tree has a vertical production through bore (11), two hydraulically or electrically controllably in-line valves (13A, 13B) in the vertical production bo... | 11/30/1999 |
| 5988282 | Pressure compensated actuated check valve A horizontal tree having a vertical bore and a horizontal production passage is landed in a wellhead housing. A tubing hanger lands in the bore and has a vertical passage and a horizontal passage that aligns with that of the tree. A retrievable first plug... | 11/23/1999 |
| 5868204 | Tubing hanger vent The internal tree cap of this invention has an isolation sleeve that stabs into a receptacle in the upper end of the tubing hanger. A seal on the exterior of the isolation sleeve seals an inner void within the isolation sleeve from an outer void. The inne... | 02/09/1999 |
| 5865250 | Fluid connector with check valve and method of running a string of tubing A tubular wellhead member has an inner seal surface. A hydraulic passage extends through the wellhead member and terminates at a port at the seal surface. A tubing hanger having an outer mating surface lands in the wellhead member. A hydraulic line extend... | 02/02/1999 |
| 5730473 | Lateral connector for tube assembly In one embodiment of the invention, there is provided a tubular assembly having a lateral connection. The assembly comprises a spool body, a carrier ring, penetrators, and an urging means. The carrier ring is built to carry the radial penetrator(s) for the car... | 03/24/1998 |
| 5706893 | Tubing hanger A tubing hanger is provided with a production bore and an annulus bore spaced radially outwardly of the production bore. The annulus bore is closed by a valve member in the form of an annular disc that is rotatable by a piston provided in the tubing hange... | 01/13/1998 |
