Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5297833 | Apparatus for gripping a down hole tubular for support and rotation An apparatus for gripping a down hole tubular for support and rotation, or a string of such tubulars, includes a body element adapted to be rotated at high torques either by a top head drive or a rotary table of an earth drilling machine. Gripping element... | 03/29/1994 |
| 5294228 | Automatic sequencing system for earth drilling machine An earth drilling machine of the type having a boom mounted adjacent a mast to move a tubular between a lower, horizontal boom position and an upper, vertical boom position also includes a lifter configured to move a length of downhole tubular between a l... | 03/15/1994 |
| 5273388 | Lifting device for down hole tubulars A lifting device for down hole tubulars is used with an earth drilling machine of the type having a boom for moving a down hole tubular from a horizontal position at an intermediate level to a raised position aligned with a drilling axis, and a tubular ho... | 12/28/1993 |
| 5259723 | Feeding device for down hole tubulars A feeding device for down hole tubulars includes a frame which defines a support surface. First and second stops are arranged to reciprocate in stop guides between an upper position, in which the stops interrupt movement of a tubular, and a lower position... | 11/09/1993 |
| 5054550 | Centering spinning for down hole tubulars A centering spinner for centering and spinning down hole tubulars having a range of diameters. The centering spinner includes a frame capable of admitting a down hole tubular therein and a plurality of roller assemblies pivotally coupled to the frame to c... | 10/08/1991 |
| 5036927 | Apparatus for gripping a down hole tubular for rotation An apparatus for gripping a down hole tubular for rotation in a drilling machine includes a support member adapted for connection to the quill of the drilling machine. The support member supports three or more guides which converge toward one another in a... | 08/06/1991 |
| 4867236 | Compact casing tongs for use on top head drive earth drilling machine Compact casing tongs include a tube which is secured to a connector, the connector in turn being supported and rotated by a quill of a top head drive assembly. The lower end of the tube regidly supports a set of cams which define multiple recesses. A jaw ... | 09/19/1989 |
| 4842250 | Line reeving system for earth drilling machine An earth drilling machine includes a crown block assembly, a travelling block assembly and a drawworks. The drawworks includes a drum which rotates about a drum axis. The drum axis is oriented at right angles to a fast line plane defined by a fast line sh... | 06/27/1989 |
| 4821816 | Method of assembling a modular drilling machine A drilling machine includes a drilling substructure skid which defines two spaced parallel skid runners and a platform. The platform supports a draw works mounted on a draw works skid, and a pipe boom is mounted on a pipe boom skid sized to fit between th... | 04/18/1989 |
| 4815546 | Top head drive assembly with axially movable quill A top head drive assembly includes a tubular quill having a central passageway aligned with an axis. The quill is supported for rotation on a load beam included in the top head drive assembly such that the quill is movable along the axis through a range o... | 03/28/1989 |
| 4762187 | Internal wrench for a top head drive assembly An internal wrench for an earth drilling machine of the type having a mast, a top head drive assembly mounted for movement along the mast and a quill rotated by the top head drive assembly includes a body having an upper end and a lower end sized to fit w... | 08/09/1988 |
| 4759414 | Modular drilling machine and components thereof A drilling machine includes a drilling substructure skid which defines two spaced parallel skid runners and a platform. The platform supports a draw works mounted on a draw works skid, and a pipe boom is mounted on a pipe boom skid sized to fit between th... | 07/26/1988 |
| 4708581 | Method of positioning a transfer arm A drilling apparatus of the type having a drilling mast and a transfer arm mounted at a first axis adjacent the mast to move between a lower position near ground level and an upper position aligned with the mast is provided with a reaction point anchor fi... | 11/24/1987 |
| 4650236 | Automatic pipe elevator An elevator for drill pipe which includes at least two jaws for supporting a length of pipe and structure for maintaining the jaws in clamping engagement with the pipe. The structure includes linkage means coupled to the jaws for maintaining the jaws clam... | 03/17/1987 |
