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:
Oct. 14, 1980
Filed:
Aug. 18, 1978
Applicant:
Inventor:
Leonard E Williams, Jr, Houston, TX (US);
Assignee:
Cameron Iron Works, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; F16J / ;
U.S. Cl.
CPC ...
13724622 ; 251 / ; 277 / ; 277127 ;
Abstract
A ram-type blowout preventer for use in the drilling of onshore and offshore wells, having secondary plastic injection sealing means whereby, on failure of the conventional ram seal, a well closure may still be ensured for protection of human life, equipment and the environment.