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:
Aug. 29, 1978
Filed:
Aug. 16, 1977
Applicant:
Inventors:
Donald R Greenlee, Dallas, TX (US);
Milton W Burns, Abilene, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166 53 ; 137487 ; 175 25 ;
Abstract
A normally open shutdown system for a high pressure gas well is disclosed which comprises a pressure-operated motor valve, a pressure sensor, and a pressure regulator, all on a conduit installed in the high pressure line leading from the gas well.