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:
Jul. 17, 2001
Filed:
Jun. 25, 1999
Applicant:
Inventors:
Larry Verl Dalrymple, Claremore, OK (US);
Harold Dean Eastin, Claremore, OK (US);
Thomson Hall Wallace, Claremore, OK (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/604 ; E21B 4/324 ;
U.S. Cl.
CPC ...
E21B 3/604 ; E21B 4/324 ;
Abstract
A power cable for an ESP is used also for heating well bores in cold climates. An electrical switch is located within a wellbore at a selected location in the power cable. The electrical switch is provided to selectively short out the conductors within the power cable, thereby allowing the power cable above the switch to be used as a resistive heating element to thaw the wellbore. While the switch is open, power supplied to power cable drives ESP in a normal manner.