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:
Mar. 16, 2010
Filed:
Apr. 27, 2007
Curtis G. Blount, Wasilla, AK (US);
Charles D. Hailey, Oklahoma City, OK (US);
Tammy S. Halley, Legal Representative, Moore, OK (US);
William D. Rauchenstein, Wasilla, AK (US);
Curtis G. Blount, Wasilla, AK (US);
Charles D. Hailey, Oklahoma City, OK (US);
Tammy S. Halley, legal representative, Moore, OK (US);
William D. Rauchenstein, Wasilla, AK (US);
ConocoPhillips Company, Houston, TX (US);
Abstract
An anti-surge/reverse thrusting tool for reducing the forces on a drill bit used in subterranean well drilling operations along with methods for drilling wells using a drill string employing the tool. The tool utilizes the pressure differential between drilling fluid flowing through the tool and the fluid located in the well bore annulus proximate the tool to reduce the likelihood of drill bit stall. The tool generally comprises an outer housing and a piston assembly that is axially shiftable relative to the housing.