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| Number | Title | Issue Date |
| 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 |
| 7331396 | Subsea production systems A subsea production system is disclosed. The subsea production system may comprise a well head, a tubing spool, a tubing hanger, an annulus, a production tree, and a bypass flow path. ... | 02/19/2008 |
| 7275591 | Tubing hanger with ball valve in production string The invention provides a wellhead assembly including a wellhead housing supporting a tubing hanger within its central bore and forming a housing stem port through its outer wall to the central bore. The tubing hanger has a side stem port formed through its body inte... | 10/02/2007 |
| 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 |
| 7025133 | Multiple bore christmas tree outlet A large bore Christmas tree includes a production outlet that is split into multiple separate outlets, each controlled by a separate, standard sized valve and valve actuator. ... | 04/11/2006 |
| 6964306 | Manifold device and method of use for accessing a casing annulus of a well A manifold device connects in series between the wellhead and the outer casing of a well for providing access to the outer casing of the well without removing the wellhead. The device includes a tubular body for receiving the tubing string of the well therethrough. ... | 11/15/2005 |
| 6915868 | Elevator apparatus and method for running well bore tubing An elevator apparatus for manipulating well bore tubing includes a circular body having a top and a central cavity around a body axis. The cavity has a diameter allowing the collar portion of the tubing to pass longitudinally therethrough. A plurality of cavity rest... | 07/12/2005 |
| 6913083 | Method and apparatus to monitor, control and log subsea oil and gas wells A method and apparatus for logging, controlling, or monitoring a subsea well or group of wells through a path not within production tubing. Preferred embodiments allow logging tools, wire rope, optic fibers, electrical cables, monitoring and measuring instruments an... | 07/05/2005 |
| 6857471 | Split base plate assembly for multiple completion wellheads A base plate assembly for supporting a number of tubular strings within a tubular housing comprises two base plate portions which when secured together are adapted to be supported on an upper end of the tubular housing. Each base plate portion comprises a top plate ... | 02/22/2005 |
| 6736212 | Drilling alignment system A method for drilling a plurality of well bores through a single conductor housing which comprises providing a base plate which includes at least first and second well slots that extend therethrough, supporting the base plate on the conductor housing, suspending a t... | 05/18/2004 |
| 6688386 | Tubing hanger and adapter assembly This invention provides a tubing hanger system which isolates production tubing from a power cable, protects the cable from high pressure, and enables pressure testing of the production and cable seals. A tubing hanger member is seated in a tubing head to... | 02/10/2004 |
| 6679330 | Tubing hanger with ball valve An apparatus for use in a subsea well including a bore, wherein the apparatus has a tubing hanger body having an annulus therethrough, a ball valve in the annulus adapted for opening and closing the annulus, comprising a ball valve body within a valve cha... | 01/20/2004 |
| 6640900 | Method and apparatus to monitor, control and log subsea oil and gas wells A method for logging, controlling, or monitoring a subsea well or group of wells through a path not within production tubing. Preferred embodiments of the present invention allow logging tools, wire rope, optic fibers, electrical cables, monitoring and me... | 11/04/2003 |
| 6634423 | Lifting top drive remote control cement head A lifting top drive sub sea staging cement head in which cement slurry flows from outside into its central bore, thru a rotating swivel connection. The cement head has a rotatably indexable reservoir cylinder with multiple cells which may be loaded with b... | 10/21/2003 |
| 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 |
| 6530433 | Wellhead with ESP cable pack-off for low pressure applications A wellhead 10 for use with subterranean wells includes an improved tubing hanger 16 including an improved electric power cable pack-off port 20 that permits positioning an electric submersible pump ("ESP") power cable 40 through the port 20 in the tubing ... | 03/11/2003 |
| 6510900 | Seal assembly for dual string coil tubing injection and method of use A seal assembly for dual string coil tubing injection into a subterranean well includes a seal plate having first and second bores with annular seals for providing a high-pressure fluid seal around first and second coil tubing strings inserted through the... | 01/28/2003 |
| 6498568 | Pipeline communication system A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network. Monitors periodically provide information to the network con... | 12/24/2002 |
| 6318458 | Water-well-head adaptor A water-well-head adaptor has an adaptor body (1) with matching plate-fastener orifices (7, 8, 9, 10) and matching pump-element apertures (14, 16, 18, 20). The plate-fastener orifices match well-plate fastener orifices (12, 13) in a predetermined class of... | 11/20/2001 |
| 6305475 | Method for simultaneously installing multiple strings within a wellbore and related tools A method of installing multiple strings within a wellbore. The method utilizes a carrier string having carrier string joints, a plurality of side strings each having side string joints, and a carrier tool for transferring the weight of the side strings to... | 10/23/2001 |
| 6202743 | Underground well electrical cable transition with seals and drain A transition for electrical well cable through the wellhead barrier of an underground well leads to an electrical power cable connected to an above-ground electrical power source, where the only connection between the electrical well cable and the electri... | 03/20/2001 |
| 6145596 | Method and apparatus for dual string well tree isolation A dual string well tree isolation apparatus includes two assemblies each having a high pressure valve and a high pressure tubing which are respectively inserted into the vertical passage of a dual string well tree, and a swedge for connection to the dual ... | 11/14/2000 |
| 5813461 | Co-axial well construction technique for hazardous waste assessment and remediation A device for use in remediation of a multiplicity of adjacent subsurface geologic strata is described. The device comprises co-axially or concentrically positioned conduits installed in a borehole with an inner conduit extending below an outer conduit thr... | 09/29/1998 |
| 5813468 | Dual casing hanger A lower casing hanger including a cylindrical block with two holes is landed on a shoulder in the bore of a wellhead housing. The first hole has shoulders that are inclined relative to the axis of the housing. The second hole is smooth and has a constant ... | 09/29/1998 |
| 5794693 | Dual tubing string hanging apparatus An apparatus for hanging a production tubing string and a guide string within a well casing having a wellhead. The apparatus includes a primary hanger shell for supporting the production tubing string and guide string in the well casing, a production mand... | 08/18/1998 |
| 5775420 | Dual string assembly for gas wells A dual completion for gas wells includes a dual base with a primary hanger incorporated in the base. Primary and secondary coiled tubing strings extend through the base at a downwardly converging angle of 2° or less. The dual base is mounted on an annula... | 07/07/1998 |
| 5732772 | Dual split tubing hanger A split tubing hanger for a well has two semi-cylindrical tubing hanger bodies. A seal has a ring portion which seals the tubing hanger bodies to the bore of a tubing head. The seal also has a diametrical band portion which joins the ring portion. The ban... | 03/31/1998 |
| 5667008 | Seal electrical conductor arrangement for use with a well bore in hazardous areas An apparatus for conducting alternating current through a well barrier made substantially entirely of ferromagnetic material includes at least one non-ferromagnetic electrically conductive rigid tube extending through its own separate passageway in the we... | 09/16/1997 |
| 5657821 | Facility for an oil well A facility for an oil well, extending from the surface (12) towards an oil-bearing rock stratum (14), includes a first casing (20) placed in the well and forming a flow way towards the surface for the hydrocarbons originating from the oil-bearing rock str... | 08/19/1997 |
| 5560435 | Method and apparatus for drilling multiple offshore wells from within a single conductor string A method and apparatus are provided for drilling multiple offshore wells from a single conductor casing string. A guide member is provided for securing to a standard casing string, and running downhole and setting within a lower section of the conductor s... | 10/01/1996 |
| 5462119 | Tubing hanging set for a submarine oil-well, running tool for its placing and handling method A tubing hanging set for hanging, locking and sealing a submarine oil well includes a tubing hanger which is seated on an upper internal surface of a connection sleeve which in turn is seated on an internal surface of a casing hanger. The tubing hanger is... | 10/31/1995 |
| 5458199 | Assembly and process for drilling and completing multiple wells A process for drilling and completing multiple subterranean wells from a common well bore and an assembly for guiding a drill string during drilling and casing during completion of such multiple wells. The assembly comprises a wellhead located at or near ... | 10/17/1995 |
| 5236037 | Unitized wellhead system There is disclosed a unitized wellhead system wherein each of concentric well strings are suspended within a well bore by means of individual hanger mandrels installed within the bore of a single wellhead housing.... | 08/17/1993 |
| 5042601 | Triple tool with sliding spider bowl An slip bowl assembly for supporting multiple pipes in a well casing includes at least two bowls which can be moved away from the centerline of the well by remote control, to allow large collars or tools on the pipe to pass through the assembly.... | 08/27/1991 |
| 4804045 | Oil and gas well diversionary spool assembly A diversionary spool assembly for the completion hook up of any type of oil and gas well without the use of an expensive and cumbersome valve tree as a permanent part of the producing well. A single valve tree is provided, and is removably mounted on any ... | 02/14/1989 |
| 4632188 | Subsea wellhead apparatus An improvement in a subsea wellhead apparatus that includes the conventional plurality of strings of conduit suspended in a borehole penetrating subterranean formations below the bottom of a sea at which the wellhead apparatus will be placed and the conve... | 12/30/1986 |
| 4424859 | Multi-channel fluid injection system Method and apparatus for introducing fluid into a wellbore through use of a multi-channel conduit.... | 01/10/1984 |
| 4381584 | Dual string spider A dual string spider having a body of two halves pivotally secured at one side and releasably secured at the other side with bowls extending through the body and open to each other, gripping means for each bowl, an actuator for each gripping means, and ba... | 05/03/1983 |
| 4298064 | Remotely operated coupling and well devices employing same A coupling device, especially for well tools, for connecting a load, such as a tubing hanger from which tubing strings depend, to an upper member, such as a handling tool, from which the load is to be suspended, with capability of remote operation of the ... | 11/03/1981 |
| 4284142 | Method and apparatus for remote installation and servicing of underwater well apparatus Method and apparatus for remote installation and retrieval of underwater well apparatus and servicing of underwater wells without diver assistance by use of a remotely operated tool carried by a handling string including a composite lower joint which cont... | 08/18/1981 |
