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| Number | Title | Issue Date |
| 7191840 | Casing running and drilling system A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spe... | 03/20/2007 |
| 7122041 | Clip device A clip device for hemostasis includes an introducing tube (outer sheath) insertable into a body cavity. An operating wire is slidably inserted into an inner sheath, which in turn is separately advanceable and retractable within the outer sheath (introducing tube). T... | 10/17/2006 |
| 7036595 | Removal of tubulars from wells Slips slidably disposed on a mandrel for lowering into a well inside a tubular to be removed from the well move outwardly to engage the tubular upon withdrawing the mandrel carrying the slips from the well. In one implementation there is a conical surface such that ... | 05/02/2006 |
| 5074361 | Retrieving tool and method A tool and method for use with a drill string or the like in capturing an object in a cavity, such as subterranean borehole, include a mandrel, object engaging apparatus for latching the mandrel to the object as the tool is moved into the borehole, and st... | 12/24/1991 |
| 4254983 | Retriever tool A retriever tool includes a central mandrel with a collet sleeve slidably disposed about the mandrel. The collet sleeve includes a plurality of upwardly extending spring fingers, each of the spring fingers having an upper portion including an upward facin... | 03/10/1981 |
| 4232894 | Selectively releasable overshot and pull tool A pulling tool for retrieving an article or fish from a well bore and utilizing a spear or grapping type action to establish connection with the fish. Cooperative internal and external tubular members are selectively movable to secure the pulling tool to ... | 11/11/1980 |
| 4101157 | Tool for fishing an object from a bore hole A tool is disclosed which fishes an object from a bore hole. The tool uses a tubular body having an upper and lower end, fingers are mounted within the body for moving between an opened position and a closed position and a spring is mounted within the bod... | 07/18/1978 |
