Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells
OwnerRichard J. Dyerinventor
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Abstract
A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and acid. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraffin and scale. This method can be used alone or with the assistance of a wash tool which is a combination pressure and surge wash tool having a nipple assembly. A by-pass port is coupled to the nipple assembly and a diverter cup is coupled to the by-pass port. A plurality of pressure wash cups are positioned on the tool. A pressure wash port is located between the plurality of pressure wash cups and a pump shoe assembly is coupled to a bottom pressure wash cup.
Claims6
An aqueous cleaning emulsion useful to remove asphaltene and/or paraffin and scale simultaneously from oil wells consisting of:
- i) from about 50% to about 98% by weight, water;
- ii) from about 0.1% to about 15% by weight, detergent;
- iii) from about 0.1% to about 20.0% by weight, hydrocarbon solvent;
- and
- iv) from about 0.1% to about 15.0% by weight acid.
Dependencies are inferred from the claim text.