Well treatment fluid diversion with low density ball sealers

Details Well treatment fluid diversion with low density ball sealers Well treatment fluid diversion with low density ball sealers

1977-09-06

1978-07-25

Novosad, Stephen J.

Wells

Processes

Fluid flow causes pellet to block opening in wall of conduit

137268, 166192, E21B 3310, E21B 4325

Patent

active

041024010

ABSTRACT:
A ball sealer for use as a diverting agent when treating a well having a perforated casing. The ball sealer is sized to plug a perforation and has a density less than the treating fluid. The ball sealer is made of a core material, such as syntactic foam or polymethylpentene, and a covering of a thin layer of an elastomeric material. After some of the treating fluid has been injected into the well, the ball sealers are injected and carried by the fluid flow down to the perforations where they seat and divert the further injection of treating fluid through the remaining open perforations.

REFERENCES:
patent: 2754910 (1956-07-01), Derrick et al.
patent: 2933136 (1960-04-01), Ayers et al.
patent: 3010514 (1961-11-01), Fox
patent: 3086587 (1963-04-01), Zandmer et al.
patent: 3144049 (1964-08-01), Ginsburgh
patent: 3174546 (1965-03-01), Flickinger
patent: 3301327 (1967-01-01), Patton et al.
patent: 3376934 (1968-04-01), Willman et al.
patent: 3437147 (1969-04-01), Davies
patent: 3645331 (1972-02-01), Maurer et al.

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