Polyurethane ball sealers for well treatment fluid diversion

Details Polyurethane ball sealers for well treatment fluid diversion Polyurethane ball sealers for well treatment fluid diversion

1978-07-03

1983-10-04

Cannon, James C.

Wells

Processes

Fluid flow causes pellet to block opening in wall of conduit

166193, 428407, E21B 33138, E21B 4327

Patent

active

044073682

ABSTRACT:
Ball sealers comprising a solid core coated with a polyurethane elastomer are introduced into a well to seal well perforations and divert fluid therein. In the preferred embodiment the ball sealers are used in a hydrocarbon liquid treating fluid and have a density less than the treating fluid.

REFERENCES:
patent: 2754910 (1956-07-01), Derrick et al.
patent: 2933136 (1960-04-01), Ayers et al.
patent: 3010514 (1961-11-01), Fox
patent: 3437147 (1969-04-01), Davies
patent: 4102401 (1978-07-01), Erbstoesser
patent: 4139060 (1979-02-01), Muecke et al.

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