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:
Nov. 09, 1993
Filed:
Jul. 16, 1991
Applicant:
Inventors:
Clyde A Willis, Wichita Falls, TX (US);
Gary T Oatman, Wichita Falls, TX (US);
Assignee:
W-N Apache Corporation, Wichita Falls, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
4147464 ; 1984636 ; 198532 ;
Abstract
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 in which the stops allow movement of the tubular. The stop guides are moveable relative to one another to adjust the separation between the stops as appropriate for tubulars of different diameters. A tilting actuator arm cycles the stops between upper and lower positions to control the feeding of tubulars along the support surface.