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| Number | Title | Issue Date |
| 8186426 | Wellhead seal assembly A seal assembly for sealing between wellhead members in a wellhead, the assembly may include a seal element and a lockdown member. The seal assembly is attachable to either one of the wellhead members by coupling the lockdown member to a locking surface on the wellh... | 05/29/2012 |
| 7325600 | Coil tubing hanger and method of using same A coil tubing hanger includes a hanger body having a hanger base with a lower end for connection to a well tree, an upper end for connection of a hanger cap and an internal cylindrical cavity for receiving an annular, externally actuated, pack-off element for select... | 02/05/2008 |
| 6948565 | Slip spool and method of using same A slip spool for selectively supporting a tubing string suspended in a wellbore can be mounted to a wellhead. The slip spool has an axial passage that is aligned with the wellbore, and at least two radial passages extending through a side wall of the slip spool and ... | 09/27/2005 |
| 6588510 | Coil tubing hanger system A coil tubing hanger system and a method of installing such system is provided. The coil tubing hanger system comprises a body having an axial opening there through. A slip bowl having a base and housing a slip that can be retained in a first position spa... | 07/08/2003 |
| 6488084 | Casing hanger seal positive stop A casing hanger lands on a load shoulder in a wellhead to seal and support a string of casing. The casing hanger has a lower ring for landing on the load shoulder, the lower ring having an upward facing surface. A plurality of circumferentially spaced rec... | 12/03/2002 |
| 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 |
| 6095242 | Casing hanger A casing hanger assembly is disclosed which includes a bottom member which centralizes a casing string within a casing head and a top member of a conventional slip-type casing hanger design. The bottom member functions to rigidly centralize the casing str... | 08/01/2000 |
| 6065542 | Adjustable hanger for tubular strings An adjustable tubular hanger for suspending a tubular string from a wellhead component is provided which includes an elongated body having a lower end adapted to be connected to the tubular string and an upper end portion including a plurality of axial an... | 05/23/2000 |
| 6015009 | Casing and tubing hanger system A hanger system for supporting production casing and coiled tubing in a surface pipe has a casing head supported on the surface pipe and has a vertical opening therethrough with an internal circumferential load shoulder. A casing hanger is supported withi... | 01/18/2000 |
| 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 |
| 5878816 | Adjustable casing hanger An adjustable casing hanger for suspending a casing string from a wellhead is provided which includes an elongated tubular body having a lower end adapted to be connected to the casing string and an upper end portion including a plurality of axial annular... | 03/09/1999 |
| 5799730 | Wellhead casing hanger assembly Opposed pairs of sockets are formed by the bottom surface of the slip housing and the top surface of the bottom ring of a casing hanger assembly. Vertical holes are provided in the elastomer seal element which is sandwiched between the slip housing and bo... | 09/01/1998 |
| 5727631 | Coiled tubing hanger A coiled tubing hanger including a hanger bowl, a slip bowl supported in the hanger body, a plurality of slip segments disposed in the slip bowl so as to be movable between a retracted position wherein the tubular member is able to pass through the coiled... | 03/17/1998 |
| 5697439 | Assembly and method for hanging elongated tubing in well bore An elongated tubing hanger assembly includes a bottom hanger sub installed upright on the well head of a well, a sealing assembly disposed within the bottom hanger sub, a slip bowl removably disposed within the bottom hanger sub immediately above and seat... | 12/16/1997 |
| 5515926 | Apparatus and method for installing coiled tubing in a well Hanger apparatus for suspending coiled tubing and equipment in a well including a tubing head having a vertical flow passage therethrough. A hanger assembly is carried in an inverted frusto-conical recess of the flow passage. The hanger assembly includes ... | 05/14/1996 |
| 5515925 | Apparatus and method for installing coiled tubing in a well Hanger apparatus for suspending coiled tubing in a well including a tubing head having a vertical flow passage therethrough. An annular sealing assembly is carried in a low counterbored portion of the flow passage. A slip assembly is carried in an upper c... | 05/14/1996 |
| 4974676 | Ground subsiding wellhead A ground subsidence wellhead has a lower wellhead assembly mounted on the ground for supporting a casing in tension and an upper wellhead assembly threaded to the top of the casing and spaced from the lower wellhead assembly. The lower assembly has a casi... | 12/04/1990 |
| 4532987 | Geothermal expansion spool piston A packing supporting piston assembly removably securable to an end section of a production casing of a geothermal well, which end section is disposed above a well head. The piston assembly when so mounted has packing in abutting sealing contact with the e... | 08/06/1985 |
