The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 1984
Filed:
Apr. 23, 1982
Emrys H Jones, Jr, Butler, PA (US);
Ronald W Umphrey, Ponca City, OK (US);
Conoco Inc., Ponca City, OK (US);
Abstract
A process for controlling the direction of advance of a generally horizontal borehole extended through a subterranean coal-bearing formation by a rotary drilling operation. As the drill string is rotated in the hole, the advance of the drill bit is guided along a designated path by repeatedly deflecting the drill string from its axis in a constant radial direction. The drill string may also be centralized and the deflection operation carried out either within or outside of the drill-pipe segment between the bit and the centralizer. A deflection unit includes a plurality of deflector pads disposed about the periphery of a segment of the drill pipe. The deflector pads are cyclicly actuated to sequentially place each pad in an extended position at a constant rotational position of the drill pipe segment.