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. 25, 2008
Filed:
Sep. 30, 2005
Applicant:
Roger Chancey, Humble, TX (US);
Inventor:
Roger Chancey, Humble, TX (US);
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/14 (2006.01); E21B 31/113 (2006.01);
U.S. Cl.
CPC ...
Abstract
A jar for use in a downhole environment comprises an hydraulic timing device which allows pressure to be controllably increased to a desired level and, on firing, a near-instantaneous release of that pressure, and which allows for selective bi-directional firing of the jar.