Method for placing ball sealers onto casing perforations

Details Method for placing ball sealers onto casing perforations Method for placing ball sealers onto casing perforations

1978-08-14

1980-04-01

Novosad, Stephen J.

Wells

Processes

Separate steps of fracturing or attacking formation

166284, E21B 3313, E21B 4326, E21B 4327

Patent

active

041956907

ABSTRACT:
A method is disclosed for transporting ball sealers down a perforated casing of a well to affect fluid diversion when hydraulically treating a formation penetrated by the well. In this invention, ball sealers are transported to said perforations in a carrier fluid system comprising a leading fluid portion having a density greater than said ball sealers and a trailing fluid portion having a density less than said ball sealers. The ball sealers will be moved downwardly in the casing to the perforations and will seat onto the perforations through which fluids are flowing to divert fluid through the unplugged perforations.

REFERENCES:
patent: 2754910 (1956-07-01), Derrick et al.
patent: 2933136 (1960-04-01), Ayers et al.
patent: 3011548 (1961-12-01), Holt
patent: 3174546 (1965-03-01), Flickinger
patent: 3292700 (1966-12-01), Berry
patent: 3376934 (1968-04-01), Willman et al.
patent: 3437147 (1969-04-01), Davies
patent: 3547197 (1970-12-01), Chevalier et al.
patent: 3595314 (1971-07-01), Garner
patent: 3715055 (1973-02-01), Kendrick et al.
patent: 3895678 (1975-07-01), Wright et al.

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