Injection molded degradable casing perforation ball sealers

Details Injection molded degradable casing perforation ball sealers Injection molded degradable casing perforation ball sealers

1998-04-06

1999-11-23

Kelly, C. H.

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

252 1, 166294, 507239, 507219, C09K 300, C09K 3102, E21B 3313

Patent

active

059900512

ABSTRACT:
A degradable ball sealer for use in the oil and gas industry is disclosed. The ball seat comprises a particular composition of matter and injection molding technique that provides a ball seal which will dissolve in stimulation or wellbore fluids after stimulation operations are complete. In use, the surface of the ball sealer softens slightly assuring a solid seal between the ball the and the casing perforation. The composition when dissolved into wellbore fluids does not pose a hazard and disperses well in aqueous based wellbore fluids. The same composition, made into a larger ball, may be used as a tubing sealer for pressure testing.

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