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| Number | Title | Issue Date |
| 7401645 | Downhole fluid disposal apparatus and methods A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has... | 07/22/2008 |
| 7108058 | Packing assembly for rotary drilling swivels and pumps having rotating shafts A packing assembly for use with a rotary drilling swivel having a cylindrical wash pipe comprising a housing assembly including a packing gland forming a sealing assembly chamber around the wash pipe, the packing gland including an injection port in open communicati... | 09/19/2006 |
| 7066410 | Common rail injector The invention relates to a common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, having an injector housing, which communicates with a central high-pressure reservoir and in which a nozzle needle is axially displ... | 06/27/2006 |
| 7029393 | Split inlet seal for grain separators and method A grain separator having an easily replaceable seal. The separator comprises a housing and a rotatable grain separation drum carried by the housing, the drum having an end face with an external annular bearing surface. A drive shaft extends axially into the drum thr... | 04/18/2006 |
| 6969094 | Tube coupling A tube coupling for the detachable coupling of tube line sections of a high-pressure tubing system. The tube coupling includes two coupling blocks held together by a clamping screw, whereby one of the coupling blocks has a coupling plug that engages a plug socket pr... | 11/29/2005 |
| 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 |
| 6739390 | Articulated seal An articulated seal for use with polished rod and rotary drive head assemblies is described. In particular, an articulated seal assembly or system 10 is described which seals a rotating drive head and polished rod between high pressure internal fluids within ... | 05/25/2004 |
| 6705615 | Sealing system and method A sealing system for sealing with a generally cylindrical surface 52 of a tubular or another tool 50 includes an annular packer element 10, a wedge ring 60 having a substantially conical outer surface 62 configured to radially expa... | 03/16/2004 |
| 6502827 | Sealing device and a method of repairing/replacing sealing devices A sealing device (20, 80, 90), optionally in the form of a kit is provided for sealing about a rotatable member such as a shaft (22). The sealing device or the kit includes a follower housing (32) for mounting about the rotatable member (32) with an axial... | 01/07/2003 |
| 6478303 | Sealing ring packing A sealing ring packing (1) includes a cooled packing casing (4) that can be placed inside a stuffing box borehole (3), and holds at least one essentially annular slide ring (5) pressed against the moved component (2) to be sealed, whose outside periphery ... | 11/12/2002 |
| 6439302 | Stripper packer A stripper packer includes a main body having a first end and a second end. A passage extends through the main body from the first end to the second end, thereby facilitating the passage of coiled tubing through the main body when the coiled tubing is bei... | 08/27/2002 |
| 6412783 | Self aligning stuffing box for pumpjacks A self aligning stuffing box for pump jacks includes a first tubular body having an interior bore with internal stops. A second tubular body has a first end with a concave contact surface. The second tubular body is telescopically received within the firs... | 07/02/2002 |
| 6394461 | Pressure compensated stuffing box for reciprocating pumping units A packing arrangement for a reciprocating pumps, particularly oil well pumps, in which a stuffing box housing contains a pressure chamber, packing seals mounted within the pressure chamber, a pump rod extending through the housing and the packing seals wi... | 05/28/2002 |
| 6371487 | Gimbal and seal for the drivehead of a downhole rotary pump The invention relates to downhole rotary pumping arrangements and more particularly to drivehead gimbals and seals used in the driveheads of downhole rotary pumps. The gimbal and seal system described enables the wobble of a rotating shaft to be absorbed ... | 04/16/2002 |
| 6167959 | Adjustable stuffing boxes for pump rods Stuffing boxes for use with reciprocating or rotating pump rods for downhole pumps include a lower housing adapted to be mounted on a wellhead and provided with internal bores for receiving the pump rod and a packing housing engaged with the lower housing... | 01/02/2001 |
| 5791411 | Wellhead stuffing box for rotating rod string A tubular mandrel is provided as a sleeve around the portion of the rod string polish rod extending through the stuffing box housing. The mandrel is coupled to the polish rod so that they rotate together. Bearings stabilize the mandrel within the housing.... | 08/11/1998 |
| 5755372 | Self monitoring oil pump seal A seal system for an oil well head, wherein the shaft rotates about its axis to drive a progressive cavity type pump. Primary and secondary polytetrafluoroethylene seals surround a sleeve that encircles the shaft. Pressure detectors connect to the space b... | 05/26/1998 |
| 5711533 | Oilfield stuffing box with polished rod alignment An oilfield stuffing box 10 employs mating flange plates 15, 16 with bolt holes appreciably larger in diameter than the bolts employed to hold the flange plates together, thereby permitting lateral displacement between the two flange plates. The lateral a... | 01/27/1998 |
| 5636688 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 06/10/1997 |
| 5622371 | Stuffing box with improved packing rings and method A stuffing box 10, 60 designed for sealing engagement with a rod member R includes a plurality of stacked packing rings 32, 110, 150, 210, and a gland member 42, 64 axially moveable relative to the stuffing box body 12, 62 for varying the compressive forc... | 04/22/1997 |
| 5577737 | Method and apparatus for establishing and maintaining a fluid seal around a polishing rod The invention is a sealing apparatus and method of providing a seal for polished rods in oil and gas well applications. The sealing apparatus has a fluid responsive gland which forms a seal between the inner surface of a unitized housing body and a polish... | 11/26/1996 |
| 5538080 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 07/23/1996 |
| 5343944 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of the borehole. The stuffing box is an annular main body having a tubing adaptor at ... | 09/06/1994 |
| 5342066 | Non-extrusion device for split annular casing/tubing hanger compression seals A non-extrusion device for split annular well casing and tubing hanger compression seals has a flat annular body having truncated, radially-split cone portions forming through holes for receiving pins or bolts and for guiding a compressed elastomer seal b... | 08/30/1994 |
| 5257812 | Polished rod protection and sealing device A reciprocable polished rod projects through a housing and a stuffing box downstream of the housing. A plurality of packings are provided in the upper portion of the housing and contacting the rod preventing fluid leakage from the housing. A retainer hold... | 11/02/1993 |
| 5245860 | Sensor for detection of oil leaks and oil quality in stuffing box of walking beam pump system A method and apparatus for sensing unacceptable oil leaks from a stuffing box in a walking beam pumping system includes a container for receiving leakage from the stuffing box which is divided by a weir into a first compartment and a second compartment wh... | 09/21/1993 |
| 5217068 | Stuffing box An improvement in a stuffing box for a rotary polished rod having a tubular housing with first and second rod guides disposed at each end and packing elements therebetween. The lower rod guide is in the form of an annular bushing, and annular interior sea... | 06/08/1993 |
| 5148699 | Stuffing box leak detector The invention is a wellhead stuffing box leak detector including a split-ring adapter which is installed between the stuffing box and the stuffing box cover. The leak detector functions to contain liquids which leak out of the well through the stuffing bo... | 09/22/1992 |
| 5137083 | Wellhead stuffing box for polished rod and accessories for same A wellhead stuffing box for a polished rod includes a body with an elongated opening extending through it to receive the polished rod. Packing in the body makes a sliding seal around the polished rod and a static seal against the interior of the body. Int... | 08/11/1992 |
| 5103915 | Wellhead housing seal assembly for damaged sealing surfaces A seal assembly for a wellhead housing and wellhead connector will seal even if the primary sealing surface becomes damaged. The wellhead connector and the wellhead housing each have primary sealing surfaces. A seal ring with upper and lower conical surfa... | 04/14/1992 |
| 5058668 | Rod guide bearing assembly for oil well pumping apparatus In well pumping apparatus in which a polished rod is arranged for extension through a stuffing box at the upper end of a wellhead, the stuffing box assembly having a pair of axially spaced bearing assemblies and packing coils positioned between rod guide ... | 10/22/1991 |
| 5044672 | Metal-to-metal sealing pipe swivel joint A metal-to-metal sealing pipe swivel joint especially useful with a subsea well completion system to pivotally interconnect the subsea wellhead to a lay-away flowline, the swivel joint having an annular seal element with metallic sealing surfaces and inne... | 09/03/1991 |
| 4981174 | Leakproof stuffing box with external lubrication for polish rod A stuffing box for an oil well pump which utilizes a separate lubricating fluid chamber for the polish rod rather than using the crude oil that is being pumped as the lubricating fluid.... | 01/01/1991 |
| 4917190 | Oil well blowout containment system An oil well blowout containment system which surrounds the polished rod is provided that will capture the oil leaking and blowing past the stuffing box packing gland. In addition, a vessel which is part of the oil well blowout containment system and is lo... | 04/17/1990 |
| 4913464 | Tubular joint with seal An improved tubular joint between two tubular members having their mating ends with inner sealing surfaces tapering outward in the direction toward the other tubular member and with a sealing ring having outer sealing surfaces for engaging the inner seali... | 04/03/1990 |
| 4900071 | Undersea hydraulic coupling with dovetail seal An undersea hydraulic coupling includes a male member and female member, and a two-piece retainer for restraining radial movement of a wedge-shaped annular seal into the central bore of the female member. The two-piece retainer includes a cylindrical reta... | 02/13/1990 |
| 4781387 | Metal to metal subsea casing hanger seal A seal assembly for providing reliable sealing between a subsea wellhead and a casing hanger suspended within the wellhead which provides a metal band between the top and the bottom of the seal section for strength, setting force acting against the portio... | 11/01/1988 |
| 4655284 | Well head shut-off device Well head shut-off device having a housing with a bore for connection to the upper end of production tubing, upper and lower shoulders in the bore and an annular pack-off element with an internal tapering expansion member driveable reciprocably between th... | 04/07/1987 |
| 4647050 | Stuffing box for a sucker rod pump assembly A stuffing box for a sucker rod pump assembly is disclosed that utilizes natural convection currents generated in a lubricating fluid reservoir mounted on the housing of the stuffing box and in fluid communication with the interior of the housing to conti... | 03/03/1987 |
| 4613140 | Self-aligning lubricating stuffing box A self-aligning and self-lubricating stuffing box for oil well polish rods, pump rods and the like, and comprising a housing disposed around the outer periphery of the rod and having an internal cooling chamber surrounding the outer periphery of the rod f... | 09/23/1986 |
