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:
May. 29, 2007
Filed:
May. 28, 2004
Applicants:
Falk W. Doering, Houston, TX (US);
Wade D. Dupree, Richmond, TX (US);
Inventors:
Falk W. Doering, Houston, TX (US);
Wade D. DuPree, Richmond, TX (US);
Assignee:
Schlumberger Technology Corp., Suger Land, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A downhole tractor is provided that includes a motor, at least one rotatable screw powered by the motor, and a chain engageable with the at least one rotatable screw, whereby rotation of the at least one rotatable screw moves the chain.