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. 07, 1989
Filed:
Jul. 16, 1987
Applicant:
Inventors:
Joseph E Vandervier, Claremore, OK (US);
Clinton A Boyd, Tulsa, OK (US);
Assignee:
Hughes Tool Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
340856 ; 340857 ; 367 81 ;
Abstract
An apparatus and method for monitoring the temperature and pressure in a well bore is used in connection with a submersible pump disposed in the well bore and electrically energized by a power conductor suspended in the well bore. A plurality of resistors and a plurality of pressure sensitive switches are disposed in the well bore along with a temperature sensitive circuit element. A constant current source at the surface provides a dc sensing signal that is superimposed on the power cable. A single voltage reading taken at the surface provides a measure of both temperature and pressure in the well bore.