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:
Mar. 24, 1987
Filed:
Mar. 17, 1986
Applicant:
Inventor:
Bernard Doremus, Echouboulains, FR;
Assignee:
Schlumberger Technology Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166319 ; 166332 ; 251 58 ; 251315 ; 251352 ;
Abstract
A ball element pivotally mounted on a sleeve that slides within the tubular valve member of a well safety valve has a radial slot extending across its width parallel to and offset from its pivotal axis. A bar extending in secant fashion across the valve member engages the slot, rotating the ball element to open and close the valve as the sleeve slides back and forth. An unslotted outer surface portion of the ball element mates with the valve seat during valve closing.