Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion
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United States of America Patent
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-
Jan 5, 1988
Issued Date -
N/A
app pub date -
Dec 10, 1986
filing date -
Aug 10, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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