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. 20, 1992
Filed:
Jun. 10, 1991
Applicant:
Inventor:
Wilfred B Wyatt, Houma, LA (US);
Assignee:
Impact Selector, Inc., Houma, LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166301 ; 166178 ;
Abstract
A remotely-adjustable, downhole fishing jar of the mechanical type is used within a well bore for freeing stuck pipe or tools. The jar, while downhole, can be set or reset by an operator at the surface for each firing stroke for any desired impact force within the capability of the finishing string to apply tension to the jar. A selected amount of tension to the fishing string is applied by the operator to set in a mechanical memory of the jar the desired impact force.