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:
Nov. 09, 1976
Filed:
Sep. 18, 1975
Applicant:
Inventor:
Raymond E Roesner, Houston, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
73151 ;
Abstract
The borehole instrument contains a pair of bellows which are equally spaced from a differential pressure transducer to provide equal temperature expansion of the liquid to provide a true reading on the transducer. A third bellows is connected between the borehole fluid and the exterior of the transducer housing to eliminate pressure buildup in or around the transducer. The instrument has utility in finding oil-water, gas-oil and gas-water interfaces and other combinations of fluid interfaces by measuring the differential pressure across the interface.