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:
Jul. 28, 1981
Filed:
Jul. 02, 1979
Applicant:
Inventor:
John V Fredd, Dallas, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166332 ; 166316 ; 251297 ; 251319 ;
Abstract
A sleeve valve which may be made up as a part of a tubing string in which the valve member has two positions. Dogs carried by the valve member alternately cooperate with spaced grooves in the body in said positions. The dogs are alternately engageable by a shifting tool to shift the valve member in opposite directions and after the valve member has been shifted, the dogs are disengaged from the shifting tool. The valve is disclosed as a part of a testing system employing a circulating tool, a cushion valve, a seal unit, and a landing nipple with a transducer fitting.