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| Number | Title | Issue Date |
| 7416021 | Armored stripper rubber A stripper rubber comprising a resilient stripper rubber body, an insert support, and a plurality of stripper rubber inserts. The resilient stripper rubber body has a drillstring bore extending therethrough. The insert support is at least partially within the body. ... | 08/26/2008 |
| 7380610 | Stripper rubber insert assembly A high-pressure stripper rubber provides inserts and support members that cooperatively support the profile of the rubber against elastic deformation. The inserts dynamically cooperate to resist elastic deformation of the rubber due to down hole pressure. The stripp... | 06/03/2008 |
| 7290771 | Bellows seals for thermoacoustic devices and reciprocating machinery A bellows has an elongated bellows body defined by a flexible wall. The wall encloses a volume and extends between a first end and a second end. The body has a cross-sectional shape and a cross-sectional dimension that are generally constant between the first and se... | 11/06/2007 |
| 7278494 | Stripper rubber insert assembly A high-pressure stripper rubber provides inserts and support members that cooperatively support the profile of the rubber against elastic deformation. The inserts dynamically cooperate to resist elastic deformation of the rubber due to down hole pressure. The stripp... | 10/09/2007 |
| 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 |
| 7237618 | Stripper rubber insert assembly A high-pressure stripper rubber provides inserts and support members that cooperatively support the profile of the rubber against elastic deformation. The inserts dynamically cooperate to resist elastic deformation of the rubber due to down hole pressure. The stripp... | 07/03/2007 |
| 7017881 | Blowout preventer ram packer and wear insert A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert having shoulders on the insert surfaces that are relieved. By relieving th... | 03/28/2006 |
| 7010889 | Riser support clamp for pipe riser or conduit A riser clamp mateable with a riser, wherein the riser clamp supports a column of the riser as material passes therein, and the riser clamp further covers or seals the opening in the partition formed through which the riser passes. The riser clamp comprises a pair o... | 03/14/2006 |
| 6966373 | Inflatable sealing assembly and method for sealing off an inside of a flow carrier An inflatable sealing assembly integrated with a flow carrier which seals the inside of the flow carrier upon detection of a physical condition (e.g. fluid pressure). The inflatable sealing assembly includes a housing, a compartment in the interior of the housing fo... | 11/22/2005 |
| 6945098 | Hydrocyclone wear-detection sensor Wear-detection sensor has a body of electrically insulating material with an opening through which a flowable substance can pass, and one or more electrical conductors surrounding the opening and adapted to undergo a discernable change in conductivity as the insulat... | 09/20/2005 |
| 6394460 | One-piece ram element block for wireline blowout preventers Ram seal units for attachment to the rams of blowout preventers incorporate an integral ram seal block having a central web, with a parallel rectangular elastomer support plates extending from opposite sides of the integral ram seal block. The central web... | 05/28/2002 |
| 6290231 | Diverter flow line seal A diverter body having an upper portion, a central portion and a lower portion is secured to the upper end of a riser and lands in a housing. The central portion has lateral flow openings that axially align with a lateral flowline outlet in the housing. A... | 09/18/2001 |
| 6109348 | Rotating blowout preventer A rotating blowout preventor having a spring-steel reinforced stripper rubber removably mounted in a rotating inner housing, wherein the stripper rubber is sealed against the drill pipe by well bore pressure and externally-applied hydraulic pressure. In a... | 08/29/2000 |
| 6003879 | Seal for steel furnace emissions A seal for a high temperature treatment vessel, particularly those common to the steel industry, has a primary purpose to prevent gases from escaping the treatment vessel. The seal is provided by a positive gas pressure curtain barrier means, a plurality ... | 12/21/1999 |
| 5873414 | Bypass valve for downhole motor A bypass valve, particularly useful for allowing a tubing string to fill or drain during tripping in and tripping out, is disclosed. The bypass valve can be used in conjunction with a downhole motor operated through a tubing string. The bypass valve featu... | 02/23/1999 |
| 5860478 | Sub-sea test tree apparatus Apparatus and a method for killing a live well after activation of a well blowout preventer is described. This is achieved by providing apparatus in the form of a shear or kill sleeve (34) in a string (26) above a sub-sea test tree and which is located be... | 01/19/1999 |
| 5279365 | Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms An improved rotary blowout preventer having a rotary housing rotably mounted within an outer housing and carrying an annular packer assembly hydraulically actuated by fluid circulated through the outer housing by hydraulic pumps. An annular adapter is det... | 01/18/1994 |
| 4783084 | Head for a rotating blowout preventor A rotating blowout preventor is comprised of a rotating head assembly which is removably received at the upper end of a main housing. The rotating parts of the head assembly are held fastened together by the provision of a unique locking plate arrangement... | 11/08/1988 |
| 4637458 | Blowout preventer for use in combination with a deep well pump A blowout preventer for use in combination with a deep well pump during steam injection, comprises a hollow cylindrical nipple having a top and bottom surface and a through cylindrical bore of diameter D1. A cylindrical mandrel is partially rec... | 01/20/1987 |
| 4529210 | Drilling media injection for rotating blowout preventors Improvements in the operation of a rotating blowout preventor. The rotating head assembly of a rotating blowout preventor includes a stripper rubber which has an upper annular member attached to the lower annular end of a metal support member. The support... | 07/16/1985 |
| 4431704 | Composition for blowout preventer A rubber composition for use in annular packer elements for blowout preventers is provided which comprises from about 45 to about 55 weight percent of an acrylonitrile-butadiene copolymer; from about 10 to about 15 weight percent of a first admixture furt... | 02/14/1984 |
| 4358085 | Keying means for segmented end ring blowout preventer An improvement in blowout preventer apparatus of the type having a radially compressible annular packing mounted within a housing chamber, the housing having axially aligned upper and lower conical bores communicating with an inner bore of the annular pac... | 11/09/1982 |
| 4345735 | Blowout preventer An oil well blowout preventer includes a radially compressible annular packing having radially-sectored end portions in a housing having axially aligned upper and lower bores communicating with the inner bore of the packing and with the sectored ends, and... | 08/24/1982 |
| 4206929 | Blow out preventer In oil and gas well pumping apparatus, a polish rod reciprocates through a stuffing box and connects to a submersible pump through a tubing string or the like. When servicing, it is desirable to close off the gas or oil pressure from below and hydraulic f... | 06/10/1980 |
| 4193574 | Well shut off device A hollow closed housing is provided to be interposed in a well casing string and the housing includes vertically spaced upper and lower walls interconnected by first and second pairs of opposite side walls. The upper and lower walls have registered passag... | 03/18/1980 |
| 4007904 | Annular blowout preventer There is disclosed an annular blowout preventer wherein a packer, received within a recess about a bore through the preventer housing, is adapted to be contracted by means of a piston having an annulus of resilient material movable inwardly within a chamb... | 02/15/1977 |
| 3994472 | Annular type blowout preventer There is disclosed an annular blowout preventer wherein a plurality of flexible bands are arranged about the packer within the recess about the bore through the preventer housing, and means are provided for moving the bands toward and away from the bore s... | 11/30/1976 |
| 3958808 | Controlled closing pattern packing unit for blowout preventer An annulus of elastomeric material in a well blowout preventer packer unit is differentially anchored about the packer axis, in order to reduce the stress levels in the elastomeric material during its inward flow toward the axis. In addition, packer inser... | 05/25/1976 |
| 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 |
