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| Number | Title | Issue Date |
| 7392841 | Self boosting packing element A packer assembly features one or more elements that preferably swell when in contact with well fluids and have a feature in them that responds to an applied load in a given direction by retaining such a boost force with a locking mechanism. A single element can hav... | 07/01/2008 |
| 7082991 | Slip spring with heel notch In order to prevent premature separation of the slip and slip spring and to simplify production of the slip casing, a self-centering spring engageable with a packer tool slip is modified according to the present invention. A groove located at a lower center of the s... | 08/01/2006 |
| 7044221 | Apparatus for coupling a tubular member to a preexisting structure An apparatus for coupling a tubular member to a preexisting structure. ... | 05/16/2006 |
| 6691788 | Retrievable packer having a positively operated support ring A retrievable packer (50) for establishing a sealing and gripping engagement between a tubing string and a well casing (34) disposed in a wellbore is disclosed. The retrievable packer (50) comprises a collet member (64) that is slidably disposed about a p... | 02/17/2004 |
| 6325148 | Tools and methods for use with expandable tubulars Methods, apparatus and tools to be used with tubular expansion apparatus. In one aspect of the invention, tools are actuated or operated within a well by selectively expanding the tool wall. To actuate the tool, the tool wall is urged outward past its ela... | 12/04/2001 |
| 6241017 | Caged slip system and release methods An improved cage slip system is disclosed. The cage is constructed so that the cones which actuate the slips extend into the cage openings. The radial extension of the slips is limited so as to retain them if they are extended in an unsupported situation.... | 06/05/2001 |
| 6152233 | Surge anchor assembly The present invention is a surge anchor mechanism which includes a main body, lower unit slidable in relation to the main body, and slip members. The slip members have at least one inclined end surface. The lower unit has an inclined surface forming a fru... | 11/28/2000 |
| 6119774 | Caged slip system An improved cage slip system is disclosed. The cage is constructed so that the cones which actuate the slips extend into the cage openings. The radial extension of the slips is limited so as to retain them if they are extended in an unsupported situation.... | 09/19/2000 |
| 5458196 | Through tubing gun hanger A gun hanger for emplacement through a tubing string into a casing string, comprising an inner mandrel, a setting means slidably received on said mandrel, said setting means including a plurality of spaced apart, extendable slips mounted thereon such that... | 10/17/1995 |
| 5449040 | Wireline-set tubing-release packer apparatus A tool, known as FM/WL Tool, utilized with a wireline adaptor kit would be secured to the lower end of a wireline setting tool. The adaptor kit would release from the tool when sufficient setting force is applied, and is retrieved with the wireline settin... | 09/12/1995 |
| 4765402 | Self-locating seal assembly A self-locating seal assembly is shown for sealing between a well string and the bore of a surrounding well conduit, the surrounding conduit being provided with an internal recess for engagement by the seal assembly. A mandrel has an internal bore, an ext... | 08/23/1988 |
| 4554972 | Well tool locking device A latch for releasably anchoring well tools such as gas lift valves, or the like, in receptacles in well conduits, the latch becoming automatically locked in the receptacle upon reaching its proper position therein.... | 11/26/1985 |
| 4444252 | Slack adjustment for slip system in downhole well apparatus A well packer having a radially extendable and retractable resilient annular sealing element and slip assembly includes a slack adjusting mechanism for maintaining the cooperating slip cones and slip members in an axially adjusted position to reduce radia... | 04/24/1984 |
| 4436150 | Bridge plug An inner mandrel extends the full length of the bridge plug, and carries a top sub at its upper end for latching engagement with a conventional overshot to retrieve the plug. A tubular outer mandrel is slidably mounted on the inner mandrel for limited axi... | 03/13/1984 |
| 4427063 | Retrievable bridge plug A retrievable bridge plug of the type having upper and lower anchors and an elastomeric packer for sealing a well casing. Drill string manipulation of the plug body effects packer compression and sealing. A ratchet maintains packer compression when engage... | 01/24/1984 |
| 4379488 | Latch for well tool An improved latch device for releasably locking in a recess in a well flow conductor. The latch is attachable to a well tool which may be positioned and operated to latch and lock in and later be retrieved from the flow conductor using wireline or TFL pum... | 04/12/1983 |
| 4349071 | Cement retainer and setting tool assembly A well tool assembly comprising a drillable cement retainer and setting tool includes a connection between a setting-tool mandrel and a retainer mandrel allowing for opening and closing of a cement valve in the retainer without disconnecting the setting t... | 09/14/1982 |
| 4284137 | Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool An instrument hanger for use in tubing is disclosed with an anti-kick, anti-fall running tool. In one embodiment, the tool includes an internal mandrel, an external sleeve, with the mandrel being tapered wherein the external sleeve supports upwardly point... | 08/18/1981 |
| 4164977 | Well latch Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expand... | 08/21/1979 |
| 4018275 | Anchoring device for well tools An improved anchoring device for well tools including installing and actuating apparatus for providing visual indication at the ground surface verifying proper latching and locking of the device in a casing string. The anchoring device includes a tubular ... | 04/19/1977 |
