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:
Apr. 16, 1996
Filed:
Dec. 22, 1994
Applicant:
Inventors:
David M Eslinger, Tulsa, OK (US);
L Michael McKee, Alvin, TX (US);
Robert M Sorem, Lawrence, KS (US);
Assignee:
Dowell, a division of Schlumberger Technology Corp., Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166187 ; 166195 ; 277 34 ;
Abstract
An inflatable packer assembly used in well service work and having a mandrel that carries a normally retracted inflatable packer unit. The unit includes an inner elastomer bladder surrounded by a reinforcement. To control the shape of the unit during inflation and thereby prevent the formation of Z-folds in the bladder, its axial stiffness is preferentially increased relative to its circumferential or hoop stiffness by devices such as carbon fibers or fiberglass tape.