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| Number | Title | Issue Date |
| 7753413 | Vapour-compression type refrigerating machine and double pipe structure and double pipe joint structure preferably used therefor A refrigerant pipe connected to a suction side of a compressor and a refrigerant pipe connected to a discharge side of the compressor are integrated into one body. A refrigerant pipe connected to an inlet side of a condenser and a refrigerant pipe connected to an ou... | 07/13/2010 |
| 7350628 | High force locking spring A spring system for relatively displacing elements attached to end mounts of the spring system. The spring system includes a housing having an axis, an internal chamber, and axially opposite bottom and top ends, a spring rod coaxial with the axis and positioned with... | 04/01/2008 |
| 7322378 | Semiconductor apparatuses and pipe supports thereof A semiconductor apparatus with a modified pipe support. The apparatus comprises an outer pipe, an inner pipe, and a pipe support. The support comprises a seat and a support ring. The seat comprises a tubular portion for supporting an outer pipe at a top end. The sup... | 01/29/2008 |
| 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 |
| 7121595 | Device for leaktight coupling of a tube to a threaded tubular nose A device for leaktight coupling of a tube to a tubular nose, the tube being provided with an outwardly-directed bead at a distance from its end, the tubular nose presenting an outside thread and including an inlet bore for defining a housing for an annular gasket an... | 10/17/2006 |
| 7032934 | Hydraulic fitting A connector for a fluid conduit is provided herein. The connector includes a conduit structure and an annular seal member. The conduit structure has a frustro-conical surface and a seal groove. The frustro-conical surface may be an external surface or an internal su... | 04/25/2006 |
| 7032690 | Apparatus and method for visually detecting wear to insert bowls, bushings, and spiders An insert bowl, bushing, or spider includes a bowl having a central bore defined by an inner surface having an upper tapered section for engaging slips supporting a work string and a lower section. A wear indicator, such as a groove or substantially horizontal groov... | 04/25/2006 |
| 6974341 | Subsea well electrical connector A wellhead assembly has an electrical connector that has a movable inner member carried in a tubing hanger for stroking outward into engagement with an stationary outer component located in a passage in the sidewall of the wellhead or tree. A running tool releasably... | 12/13/2005 |
| 6971682 | Coupling assembly A coupling assembly for fuel transfer includes a first inner conduit attached to a first ferrule adapter and a second inner conduit attached to a second ferrule adapter. An inner conduit coupling engages the first inner conduit sealing mechanism and the second inner... | 12/06/2005 |
| 6969070 | Split carrier annulus seal assembly for wellhead systems The seal assembly 10 seal between a subsea wellhead housing 12 and a casing hanger 16. A metal seal body 20 includes fingers 32 and 34 and one or more elastomeric seals 38. An upper seal body 64 may include thr... | 11/29/2005 |
| 6896297 | Gas service riser assembly and ductile pipe to plastic pipe transition connection A gas service riser assembly and ductile pipe to plastic pipe transition connection is provided. The gas service riser assembly comprises an outer ductile pipe, a plastic pipe having open ends disposed within the outer ductile pipe and extending through one end ther... | 05/24/2005 |
| 6843480 | Seal ring for well completion tools A high pressure ring seal for tube assembly joints provides structural foundation ring having inside and outside circumferential channels between end rims. The channels and rims are separated by a web of integral ring material. This web is perforated by a plurality ... | 01/18/2005 |
| 6721381 | Seal arrangement for in-core instrument housing A seal arrangement for providing a seal between a nuclear reactor in-core instrument housing and an instrument contained within the housing includes a lower seal assembly surrounding an outer portion of the in-core instrument housing, an upper seal assembly surround... | 04/13/2004 |
| 6682108 | Bottom draining tank with disposable liner and method The portable tank defines a chamber within which is disposed a liner having a sealing interface with a tank discharge assembly. The features of the sealing interface of the liner with the discharge assembly and this discharge assembly itself virtually eli... | 01/27/2004 |
| 5868437 | Composite pipe structure A pipeline is made by joining a number of pipe sections, each of which includes an inner pipe structure and an outer pipe structure. The outer pipe structure, which may be zinc plated or encased in an protective elastomeric material, includes mating coupl... | 02/09/1999 |
| 5749608 | Lateral connector for tube assembly A lateral connector for a tube assembly has a modular unit which can be used to establish a lateral connection through the sidewall of a tubular member positioned around it. The modular unit has a carrier ring, a coupling element, and a carrier body. The ... | 05/12/1998 |
| 5746454 | Pipe coupling assembly A pipe coupling assembling for use with a pipe having an inner wall, an outer wall and an interstitial space between the walls, with the pipe terminating in a coupling end defining an axial direction. The assembly includes a ferrule attached to the outer ... | 05/05/1998 |
| 5524708 | Non-metallic oil well tubing system A simple, efficient apparatus for deploying non-metallic tubing in an oil and gas well comprising a suspension system including one or more continuous support members attached to at least one bottom portion of the tubing and attached to the well head in a... | 06/11/1996 |
| 5327966 | Wellhead equipment Subsea wellhead equipment is disclosed as comprising a housing including a main body of a first material having an internal cavity thereabout and a weld body of a material having a considerably greater yield strength than that of the main body formed inte... | 07/12/1994 |
| 5311947 | Preselected casing tensioning system A well assembly utilizes a casing tensioning system that allows a preselected amount of stretch to be applied in the casing. The assembly includes a tubular mandrel that secures to the upper end of the string of casing. A load ring has internal grooves th... | 05/17/1994 |
| 5135266 | Casing slips and seal member A method and an apparatus for attaching an upper wellhead housing to casing employs a combination slip and seal assembly. An annular metal slip member is supported by a lower wellhead housing. The slip member has a conical section with an annular external... | 08/04/1992 |
| 5110144 | Casing hanger seal assembly The present invention relates to an improved seal assembly for sealing between the interior sealing surface of a well housing and the exterior sealing surface of a hanger landed within the well housing and includes a seal body having a pair of outer lips ... | 05/05/1992 |
| 5076356 | Wellhead equipment There are disclosed several embodiments of wellhead equipment wherein a seal assembly is installed within a frusto-conically shaped space between the bore of a first wellhead member and a conically shaped surface about a second wellhead member to close sa... | 12/31/1991 |
| 5070942 | Well tubing hanger sealing assembly The tubing hanger seal assembly of the present invention includes a metal to metal seal that is energized from above by a drive sleeve. The drive sleeve is threaded to the outside of the tubing hanger and as it is rotated downward, engages a load ring whi... | 12/10/1991 |
| 5060724 | Casing hanger seal locking mechanism with detent A casing hanger seal member has a locking section that will lock the seal member to the casing hanger and to the wellhead housing. The locking section includes a lower split ring that has serrations that will engage serrations on the exterior of the casin... | 10/29/1991 |
| 5044442 | Casing hanger running tool using annulus pressure A running tool will set a packoff between a casing hanger and a wellhead housing utilizing weight and hydraulic pressure. The running tool has a mandrel which connects to the drill string. A lower and an upper body are carried by the mandrel. The lower bo... | 09/03/1991 |
| 5029647 | Subsea wellhead stabilization A subsea well having inner and outer tubular housings has features to reduce bending movement of the inner housing within the outer housing. The inner and outer housings have mating wedging surface axially spaced apart from each other. These tapered surfa... | 07/09/1991 |
| 5026074 | Annular metal-to-metal seal The improved annular seal of the present invention provides a seal across an annular space between facing cylindrical surfaces and includes an outer annular ring, inner annular ring, the gap between the outer annular ring and the inner annular ring being ... | 06/25/1991 |
| 5013187 | Positioning components and energizing sealing assemblies therefor The invention relates to a method and apparatus suitable for example in enabling the installation of a casing hanger within a bore in an oil-drilling wellhead in a manner so that the installation and the sealing-in of the casing hanger is accomplished in ... | 05/07/1991 |
| 5010952 | Tubular member secured within a well support member with a preload The improved joint of the present invention includes a tubular member which is cold formed into tight gripping and sealing engagement within an internal grooved recess within a support member, such a wellhead housing. The upper end of the recess is tapere... | 04/30/1991 |
| 4995464 | Well apparatus and method There is disclosed an offshore well installation wherein a shoulder of a casing hanger body supported within a casing head on a platform at the water surface has been lowered onto a seat in the head so as to support a casing string anchored at its lower e... | 02/26/1991 |
| 4960172 | Casing hanger seal assembly with diverging taper A seal assembly for a casing hanger utilizes diverging tapered surfaces. The casing hanger locates within a wellhead housing. The casing hanger has an outer wall spaced inward from an inner wall of the wellhead housing, defining an annular clearance. At l... | 10/02/1990 |
| 4949787 | Casing hanger seal locking mechanism A casing hanger seal member has a locking section that will lock the seal member to the casing hanger, to the wellhead, or to both. A set of serrations are formed on the wellhead and also on the casing hanger, across from each other. The seal member has a... | 08/21/1990 |
| 4940087 | Seating arrangement and structure of a spool within a well casing A well construction includes a spool (12) that is insertable into a vertical well casing (14). The spool (12) has a skirt (28) that seats against a collar (26) of the well casing (14). The skirt (28) and collar (26) are of a pre-selected angle and materia... | 07/10/1990 |
| 4923006 | Insulating support for tubing string An improved wellhead structure having a housing with an internal landing seat to receive the landing shoulder on a hanger having a bore with a counterbore below the bore and a shoulder between, a hanger mandrel positioned within the counterbore and having... | 05/08/1990 |
| 4919460 | Wellhead casing hanger support mechanism A supporting mechanism for a casing hanger improves the load withstanding ability. The casing hanger is located in a wellhead housing. A recess is formed in the bore of the wellhead housing with an upward facing shoulder extending into the bore. An insert... | 04/24/1990 |
| 4903776 | Casing hanger running tool using string tension A tool for setting the packoff between the casing hanger and the wellhead utilizes differential area pistons. The tool has a mandrel which connects to a string of drill pipe. The mandrel carries a body and is axially movable relative to the body. A settin... | 02/27/1990 |
| 4900067 | Retrievable packoff with an embedded flexible, metallic band A packoff (10) with an elastomeric seal ring (16) interposed between two metallic seal rings (12) and (14) with retrievable characteristics in the form of a relatively thin apertured curved cylindrical band (50) extending between the two metallic seal rin... | 02/13/1990 |
| 4832125 | Wellhead hanger and seal An improved subsea hanger and seal having a hanger body with an external landing shoulder and an upstanding sealing rim with external sealing teeth and multiple internal camming surfaces and an actuating ring which fits within the sealing rim and includes... | 05/23/1989 |
| 4823871 | Hanger and seal assembly The improved structure of the present invention includes a hanger having a landing shoulder for engaging the landing seat within a wellhead housing, a hanger holddown ring, an external sealing surface spaced from the internal sealing surface of the housin... | 04/25/1989 |
