Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7341258 | Cammed seal assembly with sealing ring having an angled leg portion and foot portion with elastomeric energizer element A seal assembly seals first and second operational surfaces spaced apart by a gap. The first surface includes a seal groove having a base surface and first and second side surfaces. A sealing element in the seal groove has a foot portion extending parallel to the ba... | 03/11/2008 |
| 7261155 | Cable side-entry sub with grease injection flow tubes An integrated side-entry sub with grease injection flow tubes is adapted for making up in a drill string and includes a port to receive a cable, such as a wire line. A first pedestal, mounted within a cutout of the side entry sub, provides entry for the cable into t... | 08/28/2007 |
| 7210533 | Disposable downhole tool with segmented compression element and method A disposable downhole tool includes an elongated body and a compression element. The compression element is disposed about the elongated body. The compression element includes at least one preconfigured division at disposal of the disposable downhole tool. ... | 05/01/2007 |
| 7172029 | Bi-directionally boosting and internal pressure trapping packing element system The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a ... | 02/06/2007 |
| 7128145 | High expansion sealing device with leak path closures A high expansion packer or bridge plug is described. It features an external portion of a soft material that flows into spiral exterior leak paths formed when the sealing element is subjected to longitudinal compression. Preferably, the sealing element is an elastom... | 10/31/2006 |
| 7066927 | Vented seal having redundant sealing components A seal having a body and several bands extending away from the body. The bands extend around an axial portion of the body. In some embodiments, the bands project from and are formed integral with the body. For example, the bands can be rings. Two bands can be locate... | 06/27/2006 |
| 7011312 | Gland packing and sealing apparatus comprising it To provide a novel gland packing and a sealing apparatus comprising this, wherein the gland packing displays high and stable sealability for a stem and an inner wall surface of a stuffing box even for uses further requesting the movability (rotation and reciprocatin... | 03/14/2006 |
| 6997260 | Method of repairing tubular members on oil and gas wells The disclosure concerns a method and apparatus for repairing or structurally reinforcing an oil and gas well tubular member, or an assembly of tubular members. The assembly to be repaired can include a smaller diameter inner flow conveying conduit (or production tub... | 02/14/2006 |
| 6902008 | Bi-directionally boosting and internal pressure trapping packing element system Present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bi-directional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a top... | 06/07/2005 |
| 6746213 | Pad plunger assembly with concave pad subassembly A pad plunger assembly, for use in gas well tubing, includes an elongated mandrel having opposite ends and a longitudinal axis extending between the opposite ends, a pair of opposite end members each attached to one of the opposite ends of the mandrel, and a seal-fo... | 06/08/2004 |
| 6565093 | Seal structure for downhole tool A seal structure is provided for a downhole tool. In a described embodiment, a seal structure includes a seal support ring having at least one annular groove formed thereon and a longitudinal axis. At least one seal is included in the seal structure. The ... | 05/20/2003 |
| 6443458 | Packer A packer comprises an elastomeric member (2) which, in use, will deform radially when subjected to axial pressure. A plurality of steel fingers (3, 4) are vulcanized onto the elastomeric member (2). One end of each steel finger (3, 4) is accomodated in a ... | 09/03/2002 |
| 6406028 | Seal stack A seal stack includes one or more first seals that are adapted to seal in at least a first range of temperatures. The seal stack also includes a second seal that is adjacent to at least one of the first seals. The second seal is adapted to seal in at leas... | 06/18/2002 |
| 6343791 | Split mesh end ring The present invention generally provides a seal assembly, or seal array, having a seal body and one or more non-extrusion end rings to prevent or minimize extrusion of the seal body between either the packer assembly and the casing or between the packer a... | 02/05/2002 |
| 6203020 | Downhole packer with element extrusion-limiting device A sealing element system for a downhole packer reduces the tendency of the elements to extrude. Mechanical limits are provided to the amount of force that can be passed onto the uppermost and lowermost components of a sealing element system by providing a... | 03/20/2001 |
| 6182755 | Bellow seal and anchor An annular seal is made of a collapsible bellows. The bellows can function as an anchor or a seal and is easily set into position using relative component movement. The bellows folds can be slanted and their outer sealing edges can have different profiles... | 02/06/2001 |
| 6176310 | Assembly for sealing the annulus between concentric cylindrical surfaces An assembly for sealing the annular space between the inner cylindrical surface of a tubular member and the outer surface of a cylindrical member having a separate upper and lower seal member each of which are sealably and translatably positioned on the c... | 01/23/2001 |
| 6044908 | Sliding sleeve valve and seal ring for use therein A sliding sleeve valve for controlling fluid flow between a well annulus and a string of well conduit, the valve including a slidable sleeve disposed coaxially within an outer housing, the valve being provided with a primary seal member carried by the hou... | 04/04/2000 |
| 6032958 | Bi-directional pressure-energized metal seal A seal system for sealing between a pair of members is provided wherein a pair of substantially aligned walls on inner faces of the members have internal frustoconical portions. A metal ring includes a pair of lips with external frustoconical portions whi... | 03/07/2000 |
| 5904354 | Mechanically energized element The inventive sealing assembly designed to be set by longitudinal compression is mechanically energized, and comprises an elastomeric sealing element and a flexible member in intimate contact with the sealing element, a flexible portion of the flexible me... | 05/18/1999 |
| 5820130 | Mechanical seal for movable joints of machines The mechanical seal for movable joints of machines comprises at least two pairs of nonelastomer cylindrical rings (4, 5, 16) ground to each other with their faces and having their outer surfaces eccentrically displaced, and the rings themselves cooperate ... | 10/13/1998 |
| 5799949 | Annular chamber seal Internal and external metal-to-metal radially interfering seals are provided for an annular chamber. Typically, an annular chamber is used in tubular goods to be part of the hydraulic control circuitry, such as for operating subsurface equipment such as a... | 09/01/1998 |
| 5603511 | Expandable seal assembly with anti-extrusion backup An annular expandable seal assembly is disclosed for being packed between inner and outer cylindrical walls. The seal assembly has an annular expandable elastomeric seal element, an annular non-elastomeric anti-extrusion element, and an arcual non-elastom... | 02/18/1997 |
| 5584488 | Seal A seal is provided for a connector which must be reliably sealed in applications where the connection is made and undone as part of the normal use of the connector. The seal is particularly well suited to on-off tools used in downhole applications. The se... | 12/17/1996 |
| 5467822 | Pack-off tool A pack-off tool comprises a main tubular body including an expandable sealing element located between two non-expandable ring members and being mounted on a mandrel and in sealing engagement therewith at axially spaced locations. The tubular body is axial... | 11/21/1995 |
| 5246236 | Seal for long-time exposures in oil and gas well tools A seal for long-time exposures in oil and gas well tools. The seal is adapted for use in a sealed joint between two relatively movable members. In particular, the seal is designed for relatively slidable members. The seal has a body portion with a pair of... | 09/21/1993 |
| 4809989 | Coil spring supported sealing element and device An improved sealing device, which when positioned inside a flow conductor and operated, compresses and expands an improved resilient element into fluid sealing engagement between the sealing device and the inside of the flow conductor. The sealing device ... | 03/07/1989 |
| 4793621 | Sliding sleeve seal assembly incorporating replaceable elastomeric element A seal assembly for sealing the annulus defined between two telescopically related cylindrical surfaces comprises an annular groove in one of the cylindrical surfaces haiving recessed end walls for receiving the axial end portions of an annular elastomeri... | 12/27/1988 |
| 4660863 | Casing patch seal A casing patch for providing a connection between two casing sections which comprise a body means adapted to fit over an existing casing in a well bore and guide the patch into place, a slip means actuated by upward movement of the second casing section t... | 04/28/1987 |
| 4611658 | High pressure retrievable gravel packing apparatus A retrievable well packer and gravel packing system employing a multi-component packing element system is disclosed. The packing element system is expandable under axial compression to seal the annulus between a production or treatment tubing string and t... | 09/16/1986 |
| 4603740 | Subsurface safety valve A tubing retrievable surface controlled subsurface safety valve having a rotatable ball-type flow closure element is disclosed. A tubular operator assembly imparts longitudinal movement to the ball greater than the predetermined movement required to effec... | 08/05/1986 |
| 4482086 | Expandable packer assembly for sealing a well screen to a casing Improved packer assembly for sealing a well screen to a casing avoids contamination problems of expandable lead packers and the abrasion of self-sealing packers which can be rendered ineffective before they reach their intended depth. A pair of annular en... | 11/13/1984 |
| 4438933 | Hydraulic set high temperature isolation packer The invention comprises a packer design for use in high temperature well bores. The packer is set by pressuring the well fluid through a tubing string, which moves a piston and shoe assembly on the packer mandrel, compressing a non-elastomeric high temper... | 03/27/1984 |
| 4200297 | Side entry clamp and packoff Apparatus is provided for permitting a communication wireline to be suspended in a borehole along the outside of a drill stem for subsequent side entry therein and connection to a steering tool for the relaying of information from the steering tool to the... | 04/29/1980 |
| 4056144 | Positive seal pitless well adapter This is an improvement in Wellstein's U.S. Pat. No. 3,812,910 issued May 28, 1974 comprising generally: an improved shaped frustoconical seat for the saddle contoured gasket or seat in the washer or nut for better sealing the outside of the well casing wi... | 11/01/1977 |
| 4042020 | Positive seal pitless well adapter This is an improvement in Wellstein's U.S. Patent No. 3,812,910 issued May 28, 1974 comprising generally: (1) a positive supporting hook for the drop pipe slide member which cooperates with the hanger member on the nipple that extends radially through an ... | 08/16/1977 |
| 3939910 | Stuffing box and blow out preventing device for polish rods of oil well pumping units A cylindrical tube with a screw threaded packing gland in the upper end carries an upper guide rubber with a plurality of packing rubbers stacked thereabove and engaged by the gland which applies the necessary pressure to seal the polish rod reciprocating... | 02/24/1976 |
