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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7363970 | Expandable packer An integral bodied composite packer is constructed entirely of a composite material. It can include an expandable middle portion with an elastomeric cover to engage an exterior surface of a well bore. The expandable portion can include continuous strands of polymeri... | 04/29/2008 |
| 7347274 | Annular barrier tool The present invention provides for an annular barrier tool to block or restrict the flow of well fluids in the annular region of a well. ... | 03/25/2008 |
| 7331581 | Inflatable packers Improved inflatable packers are provided. A packer may be constructed from hybrid structures including slat structures and weave structures. A packer may include a bladder and a cover, with a plurality of slats disposed therebetween, and/or a weave structure or anti... | 02/19/2008 |
| 7306033 | Apparatus for isolating zones in a well An apparatus and method, particularly useful for isolating zones in a hydrocarbon wellbore. The apparatus includes a tubular section, such as a length of casing or liner tubular, arranged to be run into and secured within the wellbore which may be open hole or alrea... | 12/11/2007 |
| 7306034 | Gripping assembly for expandable tubulars Grip between a tubular being expanded and the surrounding tubular is enhanced by disposing a wire in a groove. The wire is preferably harder than the surrounding tubular so that it can dig in upon expansion. The wire is mounted in the groove so that it is not stretc... | 12/11/2007 |
| 7284603 | Expandable completion system and method A well completion having an expandable tubular. The expandable tubular having a tubular base and a conforming layer. The conforming layer being radially expandable singularly or in combination with expansion of the tubular base. The expandable tubular being perforat... | 10/23/2007 |
| 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 |
| 6974109 | Apparatus for sealing and restraining the flexible pressure boundary of an inflatable spacecraft The present invention provides a sealing and restraint apparatus to establish a pressure boundary for inflatable or expandable spacecraft. The apparatus is capable of connecting the flexible pressure boundary of an inflatable spacecraft to the rigid structure of the... | 12/13/2005 |
| 6779601 | Inflatable packing element An inflatable packing element for a bridge plug. The packing element has an anchor portion and a sealing cover portion, each of which is expanded in order to engage and seal a surrounding string of casing or borehole. The anchor portion has a minimum length defined ... | 08/24/2004 |
| 6595283 | Extrusion resistant inflatable tool Extrusion resistant inflatable tool having a biaxially oriented woven material disposed about at least one elastomeric element of the inflatable tool and radially inwardly of a rib structure of the inflatable tool. The woven material prevents extrusion of... | 07/22/2003 |
| 6530574 | Method and apparatus for expansion sealing concentric tubular structures A device and method for sealing a first cylinder in a fixed position inside a second concentric cylinder. The inner cylinder has an annular depression in its wall at the point of sealant placement, which causes the wall of the inner cylinder to intrude in... | 03/11/2003 |
| 6513600 | Apparatus and method for packing or anchoring an inner tubular within a casing The present invention provides an apparatus and method for sealing and/or anchoring against the inside surface of an outer tubular. In one embodiment, a radially expandable sleeve has at least one radially expandable separate rings located there about. Th... | 02/04/2003 |
| 6458233 | Method for manufacturing a wall thickness program into an elastomeric tubular component for incorporation into a packing device for use in a subterranean well A method of manufacturing a wall thickness program onto an elastomeric tubular component, such as an expandable bladder and/or cover element, for incorporation into a packing device for use in a subterranean well includes steps of contouring upon a surfac... | 10/01/2002 |
| 6431274 | Well packer An inflatable packer or bridge plug utilized in well bores comprises a tubular elastomeric bladder that is circumferentially surrounded by flexible metallic rib elements. At opposite ends of the packer, the ribs are secured to the inside bore of respectiv... | 08/13/2002 |
| 6431275 | Inflation control device Inflation control arrangement including a non-oriented continuous strand material bound between concentric layers of elastomeric material in an inflatable tool. Where the continuous strand material is located, inflation will be delayed.... | 08/13/2002 |
| 6223820 | Inflatable packing device including cover means for effecting a uniform expansion profile An inflatable packing device for use in a subterranean well provides a sophisticated cover means which results in a uniform expansion profile and exceptionally low angles of expansion propagation during inflation of the bladder to set the device, whereby ... | 05/01/2001 |
| 6158506 | Inflatable packing device including components for effecting a uniform expansion profile An inflatable packing device for use in a subterranean well provides a sophisticated bladder, either alone or in combination with a sophisticated cover, which results in a uniform expansion profile and exceptionally low angles of expansion propagation dur... | 12/12/2000 |
| 6009951 | Method and apparatus for hybrid element casing packer for cased-hole applications An inflatable packer having a sealing section, with noncontinuous ribs, is provided in combination with a ribbed element, which provides anchoring capabilities in tandem with the partially ribbed element which provides sealing capabilities in downhole app... | 01/04/2000 |
| 5813459 | Programmed shape inflatable packer device An inflatable packer is provided for introduction into a subterranean well bore on a conduit. A pinch can form in the inflatable elastomeric bladder of the packer during inflation or deflation, forming a seal which obstructs the effective passage of press... | 09/29/1998 |
| 5778982 | Fixed head inflatable packer with fully reinforced inflatable element and method of fabrication An inflatable packer includes a packer mandrel and an inflatable element reinforced across its entire length and attached at each end to the packer mandrel. The inflatable element is formed of multiple layers of elastomeric material including reinforcing ... | 07/14/1998 |
| 5564504 | Programmed shape inflatable packer device and method An inflatable packer and a method for its use are provided for introduction into a subterranean well bore on a conduit. A pinch can form in the inflatable elastomeric bladder of the packer during inflation or deflation, forming a seal which obstructs the ... | 10/15/1996 |
| 5495892 | Inflatable packer device and method An inflatable packer and a method for its use are provided for introduction into a subterranean well bore on a conduit. A fold can form in the inflatable elastomeric bladder of the packer during inflation or deflation, forming a seal on the central body o... | 03/05/1996 |
| 5340626 | Well packer An inflatable well packer includes several annular layers of material, consisting of a series of oriented fibers encapsulated in a resin, the fibers being oriented in directions relative to the direction of the circumference of the annular layers such tha... | 08/23/1994 |
| 5327962 | Well packer An inflatable well packer includes several annular layers of material, consisting of a series of oriented fibers encapsulated in an elastomeric resin, the inner and outer circumferential surfaces of the well packer each carry a protective layer of materia... | 07/12/1994 |
| 5327963 | Tubular coupling device A coupling device is adapted for attachment to an elastomeric tubular body having integral, looped reinforcement fibers as part of a tubular assembly. The coupling device includes a coupling member, a stem and a mechanism for retaining the elastomeric tub... | 07/12/1994 |
| 5220959 | Gripping inflatable packer A gripping inflatable packer having an elastomeric bladder expandable to sealingly engage the outer surface thereof against the wall surface of the well bore to effectively inhibit the passage of well fluid through the well bore. The gripping inflatable p... | 06/22/1993 |
| 5205567 | Reinforced inflatable packer An inflatable packer is disclosed and includes an elastomeric tubular body adapted for radial expansion and having a longitudinal axis. The packer includes an elastic outer cover surrounding said tubular body, and coupling members disposed on each end of ... | 04/27/1993 |
| 5197542 | Well packer There is disclosed a well packer for use in closing off the annulus between a casing string in which the packer is connected and a well bore into which the casing string is lowered. The packer includes a mandrel connected as part of the casing string, a s... | 03/30/1993 |
| 5183108 | Inflatable packer An inflatable packer includes an elastomeric tubular body and an outer cover surrounding the body. An end member is also provided having a capped portion threadably engageable with an annular ring member, the ring member being secured to the end portion o... | 02/02/1993 |
| 5143154 | Inflatable packing element An inflatable packing element for an inflatable packer or bridge plug utilized in subterranean wells comprises a tubular elastomeric sleeve which is surrounded by a plurality of circumferentially overlapping flexible metal ribs. The opposite ends of the r... | 09/01/1992 |
| 5048605 | Packing-seal for boreholes The packing-seal is shown in use in a borehole as a level-isolating seal for a groundwater sampler. The packing-seal shown includes an expandable annulus of Dowell (TM) water-expandable material. Surrounding that is a pressure-sleeve of rubber. A sheet of... | 09/17/1991 |
| 4979570 | Inflatable tool with rib expansion support An apparatus, such as a packer or bridge plug, and method of use, are provided for introduction into a subterranean well on a conduit. The apparatus has a cylindrical housing which may have upper and lower collars. An elastomeric seal is disposed around t... | 12/25/1990 |
| 4923007 | Inflatable packer with improved reinforcing members An inflatable packer is provided for setting downhole in an oil or gas well to prevent fluid flow past the packer. The packer is of the type which includes an upper and lower packer head, an inflatable elastomer bladder, a radially outward tubular packer ... | 05/08/1990 |
| 4892144 | Inflatable tools There are disclosed several embodiments of an inflatable tool of the type comprising a mandrel adapted to be raised and lowered within a well bore and an inflatable element including a sleeve of elastomeric material surrounding a tubular section of the ma... | 01/09/1990 |
| 4886117 | Inflatable well packers An inflatable well bore packer element, having inner and outer elastomer plies and an intermediate sheath of reinforcing wires, is secured at each end to a central mandrel by inner and outer annular coupling members. Wedge-shaped gripping members that hol... | 12/12/1989 |
| 4768590 | Inflatable well packer An inflatable packer for sealing across downhole conduits comprises a pair of rigid tubular packer heads coaxially interconnected by an inflatable tubular packer body. A bladder in the form of an elongate, flexible elastomeric sleeve includes a central se... | 09/06/1988 |
| 4614346 | Inflatable unitary packer element having elastic recovery An inflatable packer comprising an elastomeric tubular core, an outer cover, an annular reinforcement sheath sandwiched between the core and cover comprising a strength zone composed of strain-resisting elements of high modulus extending helically at alte... | 09/30/1986 |
| 4544165 | Inflatable packer An inflatable packer is disclosed that includes inner and outer sleeves of elastomeric material. An annular sheath of overlapping reinforcing members is located between the sleeves. Each reinforcing member is bent adjacent each end to move a section adjac... | 10/01/1985 |
| 4500095 | Inflatable oil well hole plug with reinforcing wires An inflatable packer assembly having an inflatable bladder having reinforcing means where the steel wires are arranged as a series of parallel inline cables positioning within the bladder and their ends are anchored in an upper and a lower shoe means and ... | 02/19/1985 |
| 4492383 | Inflatable well bore packer with pressure equalized rib cavity An inflatable packer which includes a tubular mandrel with an inflatable sleeve position about and connected to the mandrel by a pair of axially spaced apart collars. The ends of the sleeve are reinforced by reinforcing sheaths which include a plurality o... | 01/08/1985 |
