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. 13, 2012
Filed:
Sep. 07, 2007
Applicant:
Denis J. Blaquiere, Lloydminster, CA;
Inventor:
Denis J. Blaquiere, Lloydminster, CA;
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 19/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system comprises a progressive cavity pump including a helical rotor disposed within a mating stator. In addition, the system comprises a rod string having a longitudinal axis, a first end, and a second end coupled to the rotor. Further, the system comprises a rotation retarding device coupled to the first end of the rod string, wherein the rotation retarding device retards the rotation of the rod string relative to the stator. Still further, the system comprises a lifting device coupled to the rotation retarding device, wherein the lifting device is operable to apply an axial lifting force to the rotor.