Wells – Processes – Dissolving or preventing formation of solid oil deposit
Patent
1976-07-29
1978-05-23
Guynn, Herbert B.
Wells
Processes
Dissolving or preventing formation of solid oil deposit
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.
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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.
Foral Thomas
Landess John A.
Maly George P.
Floyd Gerald L.
Guynn Herbert B.
Hartman Richard C.
Sandford Dean
Union Oil Company of California
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