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:
May. 04, 1993
Filed:
Sep. 17, 1990
Applicant:
Inventors:
Gordon O Cates, Houston, TX (US);
Ronald M Bass, Houston, TX (US);
Kenneth J Schmitt, Spring, TX (US);
Assignee:
Production Technologies International Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166369 ; 166 651 ; 166 664 ; 166 68 ; 166106 ; 4174233 ;
Abstract
A method and apparatus for producing wells in which the tubing and casing are used as electrical conduits for a centrifugal pump in the well and single phase A. C. or D. C. current is supplied to the well and converted to three phase current at the pump motor.