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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.:

US 4716964 B1

PDFFull Text
Date of Patent:
Jan. 05, 1988

Filed:

Dec. 10, 1986

Use of degradable ball sealers to seal casing perforations in well

Applicant:
Inventors:

Steven R Erbstoesser, Missouri City, TX (US);

Claude E Cooke, Jr, Houston, TX (US);

Richard G Sinclair, Columbus, OH (US);

Michael M Epstein, Columbus, OH (US);

Assignee:

Exxon Production Research Company, Houston, TX (US);

Attorneys:

Cox; Hubert E.

Lawson; Gary D.

Primary Examiner:

Stephen J Novosad

Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166284 ; 166278 ; 166307 ; 166308 ; 528354 ;
Abstract

Plugging perforations in casing in a wellbore penetrating a subterranean formation using degradale ball sealers. The ball sealer used is composed of a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. After the polymer degrades, the flow through the perforation returns to substantially its initial value.

Find Patent Forward Citations

Erbstoesser, Steven. (1988). Use of degradable ball sealers to seal casing perforations in well (U.S. Patent No. 4716964). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4716964

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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