Method and solvent composition for stimulating the production of

Wells – Processes – Dissolving or preventing formation of solid oil deposit

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166305R, 252 855B, E21B 4325, E21B 4312

Patent

active

040905624

ABSTRACT:
A method and solvent composition for removing viscous crude oil, waxes, asphaltenes and resin precipitates of petroleum origin from oil wells, flow lines and pore spaces of oil-bearing formations. The solvent composition is a mixture of about 45 to about 85 volume percent of a nornally liquid aliphatic hydrocarbon boiling in the range of about 120.degree. F. to about 550.degree. F., between about 5 to 45 volume percent of a normally liquid aromatic hydrocarbon, between about 0.5 to about 6 volume percent of an ether of an aliphatic polyhydric alcohol, and between about 1 to about 15 volume percent of a lower alkyl monohydric alcohol.

REFERENCES:
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patent: 2753939 (1956-07-01), Carpenter et al.
patent: 3241614 (1966-03-01), Bertness
patent: 3279541 (1966-10-01), Knox et al.
patent: 3402770 (1968-09-01), Messenger
patent: 3756319 (1973-09-01), Holm et al.

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