04716964 is referenced by 218 patents and cites 9 patents.

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.

Title
Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion
Application Number
291200
Publication Number
4716964
Application Date
December 10, 1986
Publication Date
January 5, 1988
Inventor
Michael M Epstein
Columbus
OH, US
Richard G Sinclair
Columbus
OH, US
Claude E Cooke Jr
Houston
TX, US
Steven R Erbstoesser
Missouri City
TX, US
Agent
Gary D Lawson
Hubert E Cox
Assignee
Exxon Production Research Company
TX, US
IPC
E21B 43/26
E21B 43/25
E21B 33/10
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