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| Number | Title | Issue Date |
| 7343968 | Washpipe seal assembly A coupling seal assembly is described for directing a pressurized abrasive fluid between a non-rotating conduit member and a rotating second conduit member. The seal assembly includes a first ceramic floating seal member secured to the non-rotating conduit member an... | 03/18/2008 |
| 7240727 | Armored stripper rubber An armored stripper rubber is provided that protects the drillstring bore of the stripper rubber from substrate infiltration, yet pivotally dilates to facilitate the passage of drillstring components through the bore while effectively maintaining a fluid-tight seal.... | 07/10/2007 |
| 6974135 | Variable bore ram A ram type blowout preventer includes variable ram packers for sealing about tubulars of different outside diameters in the bore of the preventer housing or about a single tubular having a variable outside diameter. Each ram packer includes a body of elastomeric mat... | 12/13/2005 |
| 6953085 | Well pressure activated pack-off head The present invention discloses a well pressure activated pack off head comprising a hollow body formed for coaxial connection to the wellhead which provides for unobstructed passage of a data transmitting wireline therethrough. Disposed coaxially within the hollow ... | 10/11/2005 |
| 6910531 | Rotating drilling stripper A stripper assembly for sealing around a drill pipe includes an outer housing having a lateral outlet. The outer housing is mounted at an upper end of a well for receiving an upward flow of drilling fluid and diverting the drilling fluid through the lateral outlet. ... | 06/28/2005 |
| 6649836 | Compressor electronics housing Housing is provided for electronic circuitry that monitors the operation of a compressor. The housing includes a module containing the electrical circuitry as well as electrical connectors that connected the circuitry to external wiring. The module is mou... | 11/18/2003 |
| 6425444 | Method and apparatus for downhole sealing A method of providing a downhole seal, such as a packer (12), in a drilled bore between inner tubing (11) and outer tubing (16) comprises: providing an intermediate tubing section (18) defining a seal arrangement for engaging with the inner tubing; and ra... | 07/30/2002 |
| 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 |
| 5851013 | Blowout preventer packing element with metallic inserts A packing element for an annular blowout preventer includes an annular elastomeric body disposed about a longitudinal axis that is adapted to be compressively displaced inwardly towards the axis. A plurality of the metallic inserts are embedded in the bod... | 12/22/1998 |
| 5588491 | Rotating blowout preventer and method The rotatable blowout preventer 10 comprises a stationary outer housing 12 and a rotatable inner housing 38 having a curved surface 42 thereon defining a portion of a sphere. An annular packer assembly 46 includes spherical packer elements for sliding eng... | 12/31/1996 |
| 5361832 | Annular packer and insert An annular packer (P) with an axial bore (21) includes an elastomer body (23) with inserts (22) partially embedded therein and spaced circumferentially about the axial bore (21). The inserts (22) each support an element (24') embedded in the elastomer bod... | 11/08/1994 |
| 5325925 | Sealing method and apparatus for wellheads A metal-to-metal sealing method and apparatus for use on oil and/or gas wells, utilizes an upper seal member and a lower seal member, wherein the energizing of the seal members is staged to cause the lower seal member to become sealingly engaged. before t... | 07/05/1994 |
| 5116017 | Annular sealing element with self-pivoting inserts for blowout preventers An improved annular sealing element for oil well blowout preventers includes a plurality of curved metal segments spaced apart at regular circumferential angles and imbedded in a resilient matrix forming a generally lenticular-shaped body with a hollow ce... | 05/26/1992 |
| 4949785 | Force-limiting/wear compensating annular sealing element for blowout preventers An improved annular sealing element for oil well blowout preventers includes a plurality of curved metal segments spaced apart at regular circumferential angles and imbedded in a resilient matrix forming a generally lenticular-shaped body with a hollow ce... | 08/21/1990 |
| 4858882 | Blowout preventer with radial force limiter An oil well blowout preventer has a housing with axially aligned entrance and exit pipe casing bores and a coaxially aligned hemispherical cavity in the upper portion of the housing. A ring-shaped, convex upper surface sealing member fits conformally with... | 08/22/1989 |
| 4657263 | Annular packing unit and insert A packer unit and packer insert adapted for use in an annular blowout preventer. The packer insert includes a generally longitudinal web with its leading edge facing the axial bore of the packing unit sloping from top to bottom in a generally radially out... | 04/14/1987 |
| 4605195 | Annular blowout preventer packing unit An annular blowout preventer packer unit is disclosed having an annulus of elastomeric material in which is embedded metallic drive inserts provided in an outward circle about the axis. Metallic lead inserts are provided in an inward circle about the axis... | 08/12/1986 |
| 4602794 | Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element An annular blowout preventer for use on an oil or gas well rig having a lower housing, an upper housing, a resilient sealing means, a vertical bore coaxially positioned through the housing and a vertically acting piston for actuating the sealing means in ... | 07/29/1986 |
| 4579314 | Annular blowout preventer An annular blowout preventer having a body with a central bore therethrough and a packer recess surrounding and opening on said recess, an annular packer which is a complete ring or a split ring in said recess, means for actuating said packer to closed po... | 04/01/1986 |
| 4508311 | Annular blowout preventer An improved annular blowout preventer having a body with a central bore, an annular packer chamber facing the bore, an improved annular packer in said chamber and means for axially loading said annular packer to actuate it to closed position, said improve... | 04/02/1985 |
| 4461448 | Well blowout preventer, and packing element A well blowout preventer packer unit is characterized by long life, and induced back to front (radial) rubber feeding between metallic inserts to close on well pipe for producing a pressure gradient against the pipe which is greatest at the bottom of the ... | 07/24/1984 |
| 4460151 | Annular blowout preventer An annular blowout preventer having a housing with a vertical bore therethrough, a packer within the housing including a resilient annulus and upper and lower series of irising metal inserts adapted to increase the support for the annulus when it is defor... | 07/17/1984 |
| 4460150 | Annular blowout preventer An improved annular blowout preventer having a housing, an annular packer mounted in the housing, and a piston mounted in the housing for the application of an axial force to the annular packer; the annular packer includes a resilient annulus with a circu... | 07/17/1984 |
| 4460149 | Annular blowout preventer with upper and lower spherical sealing surfaces An annular blowout preventer for use on an oil or gas well rig having a lower housing, an upper housing, a resilient sealing means, a vertical bore coaxially positioned through the housing and a vertically acting piston for actuating the sealing means in ... | 07/17/1984 |
| 4452421 | Well blowout preventer, and packing element A well blowout preventer packer unit is characterized by long life, and induced back to front (radial) rubber feeding between metallic inserts to close on well pipe or on a well tool for producing a pressure gradient against the pipe or tool which is grea... | 06/05/1984 |
| 4448255 | Rotary blowout preventer A rotary blowout preventer having a radially compressible packing to be sealingly engaged with and rotated by a drill pipe or kelly and a hydraulically actuated wedging piston for compressing the packing is provided with a rotatable bearing support which ... | 05/15/1984 |
| 4444401 | Flow diverter seal with respective oblong and circular openings A seal member of elastomeric material which is shaped to fit sealably within a recess of a flow diverter body. On the inside of the diverter body, a seal is effected against a slidable cylindrical valve sleeve. On the outside of the diverter body, a seal ... | 04/24/1984 |
| 4360186 | Swivel joint A Swivel Joint for use on producing wells which are being pumped, having an upper and a lower annular member, in juxtaposition, with a coil spring separating the members, the lower member having a curved external face to receive, in line contact, the insi... | 11/23/1982 |
| 4339107 | Well blowout preventer packer assembly and packer modules therefor A well blowout preventer packer that is assembled by means of modularly constructed and defined elements. The modular elements are assembled and interlocked individually without resorting to cementing them together whereby individual elements may be repla... | 07/13/1982 |
| 4310139 | Annular blowout preventer An annular blowout preventer having a housing with a vertical bore therethrough, a packer including a resilient annulus and upper and lower series of irising metal inserts adapted to increase the support for the annulus when it is compressed axially to co... | 01/12/1982 |
| 4099699 | Annular blowout preventer There is disclosed an annular blowout preventer having a packer which is surrounded by an annulus of resilient material, and an operating system which includes means for longitudinally compressing the outer annulus in order to constrict its inner circumfe... | 07/11/1978 |
| 4098341 | Rotating blowout preventer apparatus Rotary blowout preventer apparatus includes: (a) an upright tubular body adapted to receive an annular packer to be constricted about a rotating well element, (b) and a rotary annular assembly carried in the body to rotate relative thereto and with the packer ... | 07/04/1978 |
| 4098516 | Blowout preventer packing unit with slanted reinforcing inserts An annular blowout preventer packing unit having a longitudinal axis incorporates metallic inserts having webs that extend both longitudinally and about that axis to define surfaces which have longitudinally facing extents to anchor and resist longitudina... | 07/04/1978 |
| 4095805 | Annular blowout preventer There is disclosed an annular blowout preventer having a packer comprising an annulus of resilient material which is movable from an open bore position to a constricted, closed bore position by means which include links arranged to exert a force on the pa... | 06/20/1978 |
