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. 20, 2001
Filed:
Aug. 31, 1999
Applicant:
Inventors:
Rodger Dale Lacy, Houston, TX (US);
Billy Ray Newman, Houston, TX (US);
John Hughes, S.W. Calgary, CA;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 3/31295 ;
U.S. Cl.
CPC ...
E21B 3/31295 ;
Abstract
A hydraulically controlled packer for an oil or gas well is disclosed that is capable of being hydraulically unset. One embodiment of the invention is capable of being hydraulically unset prior to locking thus allowing fine tuning of packer location in relation to oil-bearing strata. Other embodiments of the invention are capable of being hydraulically unlocked and unset for further use within the oil or gas well without being withdrawn to the surface for reassembly. The invention may be used in downhole well tools other than packers.