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:
Feb. 14, 2012
Filed:
Jan. 19, 2010
Applicant:
Billy W. White, Spring, TX (US);
Inventor:
Billy W. White, Spring, TX (US);
Assignee:
Robbins & Myers Energy Systems L.P., Willis, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 34/06 (2006.01); E21B 34/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system for regulating the flow of fluid through a progressing cavity motor includes an annulus restriction () for restricting flow through the annulus passageway, and an annular biasing member () for biasing the annular restriction toward a closed position. Fluid flow in the annulus passageway creates an opening force on the annulus restriction. A central restriction () within the motor provides a restricted flow through the motor. A central biasing member () biases the central restriction toward an open position, with fluid flow in a central passageway exerting a closing force on the central restriction.