Process for removing flow-restricting materials from wells

Details Process for removing flow-restricting materials from wells Process for removing flow-restricting materials from wells

1988-11-21

1989-07-18

Suchfield, George A.

Wells

Processes

Cleaning or unloading well

166276, 166295, 252 8552, E21B 2100, E21B 3706

Patent

active

048484709

ABSTRACT:
An improved process for removing from a wellbore in a subterranean formation particulate material bonded together by a cured phenolic resin. The material is contacted with a solvent composition comprising a liquid selected from the groups: N,N-dimethylformamide, N-methyl-2-pyrrolidone and mixtures thereof for a sufficient time to separate the particulate material and then the separated material is removed from the wellbore.

REFERENCES:
patent: 3402770 (1968-09-01), Messenger
patent: 3976135 (1976-08-01), Anderson
patent: 4085059 (1978-04-01), Smith et al.
patent: 4276186 (1981-06-01), Bakos et al.
patent: 4514310 (1985-04-01), Heilweil
patent: 4541489 (1985-09-01), Wu

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