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:
Dec. 10, 2013
Filed:
Dec. 01, 2009
Franz Aguirre, Missouri City, TX (US);
Wade D. Dupree, Sugar Land, TX (US);
Mark Holly, Sugar Land, TX (US);
Derek Copold, Sugar Land, TX (US);
Franz Aguirre, Missouri City, TX (US);
Wade D. Dupree, Sugar Land, TX (US);
Mark Holly, Sugar Land, TX (US);
Derek Copold, Sugar Land, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A tractor configured for grip locking during advancement to avoid slippage, particularly in open-hole wells. The tractor is equipped with a grip lock mechanism for independently locking an anchor grip in a radially outward direction. This locking occurs sequentially in advance of the power stroke of a reciprocating drive piston associated with the anchor. Thus, radial outward expansion and gripping are ensured at the time pulling of a load in an axial downhole direction is pursued. Such grip locking may be employed throughout tractoring or intermittently, depending upon well characteristics such as formation hardness and well diameter.