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US 5,676,763 AGranted
Process for cleaning pipe dope and other solids from well systems
AssigneeWell-Flow Technologies, Inc.
InventorsDarrell P. Salisbury, Robert L. Sloan
Life of this patent
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Abstract
An improved chemical composition and process for cleaning pipe dope from wellbores has been established. The chemical composition is of an aliphatic hydrocarbon and/or esters with a biodegradable water insoluble monoterpene preferably having a flash point (PMCC) greater than 140.degree. F. the mixture then used neat, or in a dispersion of seawater, being used to remove pipe dope from tubing, casing and the like.
Claims9
A process for cleaning pipe dope from a well system comprising the steps of
- (a) preparing a pipe dope cleaning composition of from about 90% to about 10% by weight terpene hydrocarbon with a flash point greater than 140.degree. F. and about 10% to about 50% by weight a component selected from the group consisting of oil soluble aliphatic hydrocarbons with a flash point of greater than 140.degree. F., esters with a flash point of greater than 140.degree. F. and mixtures thereof;
- (b) pumping the composition with water into a wellbore;
- (c) contacting the area in the wellbore with the pipe dope with the composition;
- and
- (d) removing the composition and pipe dope from the wellbore.
2 more elements
Dependencies are inferred from the claim text.