Boring or penetrating the earth – With orienting or racking means for unconnected tools or...
Patent
1987-09-22
1989-01-31
Novosad, Stephen J.
Boring or penetrating the earth
With orienting or racking means for unconnected tools or...
175202, 175203, 166 665, 166 775, 414 2252, E21B 1900
Patent
active
048009687
ABSTRACT:
An elevator bail with elongated slots, an elevator tilting assembly and indexing apparatus, and a top drive drilling unit in combination with such devices that are connected to the upper end of a drill string and movable upwardly and downwardly with the drill string along a guide apparatus and that can be provided with a pipe handling mechanism for lifting and positioning the drill string which can can be swung about a vertical axis to a more advantageous attitude for loading or unloading drill pipe. Movement about the vertical axis can be achieved through the use of an air or hydraulic cylinder. Fitted about the top drive central shaft can be a rotable air conducting sealing gland and about its perimeter an annular ring containing a target material that is sensitive to a proximity switching device. The annular ring is rotable through an infinite angular travel and is able to be secured against unwanted rotation. In conjunction with the rotable annular ring is a hydro-electric circuit which will through a natural sequence of action, direct fluid under pressure to a top drive motor which will then rotate an elevator link/drill pipe elevator combination to a predetermined and desired angular displacement relative to a fixed work stand, from which drill pipe is loaded and unloaded from the elevator by a person or persons standing upon the work stand.
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Varco General Catalog 1984 pp. 5-8 (Top drive with link tilt); p. 28 (link); pp. 30, 34 (elevator, link).
Varco Top Drive Drilling System Description and Specifications 1985; pp. ii, 4, 16, 18, 24, 29, 31.
"DC Electric Power Swivel Can Save Time and Money" WORLD OIL, Jan. 1972; Top drive and tilting swivel.
"Drilling with Top Head Drives," Bowen Tools, Inc., D. Slator, prior to Oct. 1983; pp. 6-7 (IV-E) FIG. 2; FIG. 3.
"Trends in Rig-Floor Technology", Oil & Gas Journel, G. Boyadjieff, Aug. 1981; Top Drive.
Composite Catalog, BJ section, 1986; pp. 8, 16, 33 Top drive, air swivel ring, link tilt, links.
Composite Catalog, BJ section 1980; pp. 8, 38, 41 air swivel ring, elevator, link stabilizer, links.
Composite Catalog, Industrial Export Section, 1980; p. 4102 elevator, links.
Composite Catalog King Oil Tools, Inc.; p. 4265 elevator links, elevator stabilizer.
Composite Catalog King Oil Tools, Inc. section, 1980; pp. 4360-4361 elevator links.
Cline Billy M.
Shaw Daniel G.
Letchford John F.
Novosad Stephen J.
Triten Corporation
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