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:
Aug. 25, 2015
Filed:
Nov. 08, 2012
Applicant:
Lufkin Industries, Inc., Lufkin, TX (US);
Inventor:
David W. Doyle, Lufkin, TX (US);
Assignee:
LUFKIN INDUSTRIES, LLC, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/12 (2006.01); F04B 47/02 (2006.01); F04B 47/04 (2006.01);
U.S. Cl.
CPC ...
E21B 43/127 (2013.01); E21B 43/12 (2013.01); F04B 47/02 (2013.01); F04B 47/04 (2013.01); Y10T 74/18182 (2015.01);
Abstract
Adaptable systems for a surface pumping unit that includes a low inertia pumping unit mechanism having a pneumatic counterbalance assembly are described, as well as methods for the use of such systems for subterranean fluid recovery. The system is capable of being integrated with well management automation systems, thereby allowing for response to active control commands, and automatically altering and/or maintaining a counterbalance force in the pumping unit by adding or removing air mass from a containment vessel associated with the pumping unit.