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. 08, 2015
Filed:
Oct. 09, 2009
Applicants:
David Alston Edbury, Reading, GB;
Duncan Charles Macdonald, Houston, TX (US);
Inventors:
David Alston Edbury, Reading, GB;
Duncan Charles MacDonald, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/00 (2006.01); H01C 3/00 (2006.01); E21B 44/02 (2006.01); E21B 43/24 (2006.01); H05B 3/48 (2006.01);
U.S. Cl.
CPC ...
H01C 3/00 (2013.01); E21B 43/2401 (2013.01); E21B 44/02 (2013.01); H05B 3/48 (2013.01); H05B 2214/03 (2013.01); Y10T 29/49083 (2015.01);
Abstract
A system for forming a subsurface wellbore includes a rack and pinion system including a chuck drive system. The chuck drive system operates a drilling string. An automatic position control system includes at least one measurement sensor coupled to the rack and pinion system. The automatic position control system controls the rack and pinion system to determine a position of the drilling string.