Composition and placement process for oil field chemicals

Wells – Processes – Material placed in pores of formation to treat resident...

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166922, 252 8551, 252 8552, 252 8553, 252 8555, 42840221, 42840224, E21B 4316, E21B 4102, E21B 3706

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active

049863541

ABSTRACT:
Oil field chemicals are incorporated in microcapsules of the condensation product of hydroxyacetic acid or the co-condensation product of hydroxyacetic acid and other compounds containing hydroxy-, carboxylic acid-, or hydroxycarboxylic acid moieties. The microcapsules are then introduced into an oil well bore and/or subterranean oil formation where the microcapsules dissolve over a period of time and release the oil field chemicals.

REFERENCES:
patent: 2676945 (1954-04-01), Higgins
patent: 3574132 (1971-04-01), Mosier et al.
patent: 3666678 (1972-05-01), Mosier et al.
patent: 4272398 (1981-06-01), Jaffe
patent: 4585482 (1986-04-01), Tice et al.
patent: 4670166 (1987-06-01), McDougall et al.
patent: 4741401 (1988-05-01), Walles et al.

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