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:
Sep. 05, 1989
Filed:
May. 16, 1988
Applicant:
Inventors:
Hiram E Lindsey, Midland, TX (US);
Roger P Allwin, College Station, TX (US);
Richard W Adams, Bryan, TX (US);
Assignee:
Lindsey Completion Systems, Inc., Midland, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166382 ; 166153 ; 166194 ; 166208 ; 166387 ;
Abstract
A selectively releasable valve in a wiper plug releasably attached to a hydraulic setting tool for a liner hanger in a well bore where the valve has an annular valve seat member having collapsible finger members for sealingly receiving a ball member. The valve seat member is movable under predetermined hydraulic pressure to shift and expand the finger members to release the ball member. The valve seat member is retained in the wiper plug.