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. 11, 1983
Filed:
Jun. 22, 1981
Applicant:
Inventor:
Howard L McGill, Lufkin, TX (US);
Assignee:
Schlumberger Technology Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
73155 ; 166237 ;
Abstract
In accordance with an illustrative embodiment of the present invention, a one-way clutch mechanism is incorporated between the mandrel and housing of a rotary-operated pump apparatus that is used to inflate the packers of a drill stem testing system. The mandrel can be freely rotated to the right to operate the pump, however left-hand rotation causes the clutch mechanism to engage and the housing to be rotated with the mandrel to the left to disconnect a safety joint located in the tool string between the pump apparatus and the packers.