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. 15, 2015
Filed:
Apr. 07, 2009
Applicants:
Stephen D. Hill, Pearland, TX (US);
Cecilia Prieto, Houston, TX (US);
Inventors:
Stephen D. Hill, Pearland, TX (US);
Cecilia Prieto, Houston, TX (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 23/08 (2006.01); E21B 23/04 (2006.01); E21B 4/18 (2006.01); E21B 23/14 (2006.01); F16L 55/30 (2006.01); E21B 23/00 (2006.01); F16L 101/70 (2006.01);
U.S. Cl.
CPC ...
E21B 23/04 (2013.01); E21B 4/18 (2013.01); E21B 23/14 (2013.01); F16L 55/30 (2013.01); E21B 2023/008 (2013.01); F16L 2101/70 (2013.01);
Abstract
A tractor assembly is provided for downhole advancement in a well. The assembly comprises an uphole tractor and a downhole tractor. Each tractor in turn comprises uphole and downhole housings to accommodate uphole and downhole anchors with the anchors configured for interchangeably engaging a wall of the well. Additionally, a hydraulically driven piston is disposed through each of the housings of each tractor for actuation of the engaging.