A method for cleaning oil wells to increase the flow of oil thereof by use of a unique cleaning emulsion comprising of water, hydrocarbon solvent, terpene hydrocarbon material, demulsifier, detergent, and optionally an acid. This one step method provides for the simultaneously cleaning/removal of as
A method for cleaning oil wells to increase the flow of oil thereof by use of a unique cleaning emulsion comprising of water, hydrocarbon solvent, terpene hydrocarbon material, demulsifier, detergent, and optionally an acid. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraffin and scale at a wide range of temperatures. 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, or a hydro self-rotating nozzle wash tool.
대표청구항▼
1. A cleaning emulsion useful to remove asphaltene and/or paraffin and scale simultaneously from oil wells consisting of: i) from about 10% to about 40% by weight, water;ii) from about 0.1% to about 15% by weight detergent;iii) from about 10% to about 40.0% by weight, hydrocarbon solvent;iv) from ab
1. A cleaning emulsion useful to remove asphaltene and/or paraffin and scale simultaneously from oil wells consisting of: i) from about 10% to about 40% by weight, water;ii) from about 0.1% to about 15% by weight detergent;iii) from about 10% to about 40.0% by weight, hydrocarbon solvent;iv) from about 10% to about 40% by weight terpene hydrocarbon material;v) from about 0.000001 to about 0.00001% by weight demulsifier; andvi) optionally, from about 0.1% to about 15% by weight acid, with the proviso that said emulsion is in a stable state over a wide range of temperatures. 2. The emulsion as set forth in claim 1 wherein the water is conditioned water. 3. The emulsion as set forth in claim 1 wherein the detergent contains a material selected from the group consisting of zwitterionic, ampholytic, nonionic, anionic and cationic surfactants and mixtures thereof. 4. The emulsion as set forth in claim 1 wherein the hydrocarbon solvent is selected from the group consisting of gasoline, diesel, jet fuel, kerosene, zylene, mineral spirits and mixtures thereof. 5. The emulsion as set forth in claim 1 wherein the terpene material is selected from the group consisting of limonene, dipentene, pinene, alpha-pinene, beta-pinene, carene, delta-3-carene, and mixtures of these materials. 6. The emulsion as set forth in claim 5 wherein the oil well has a pH of less than about 7.2 and acid is not present. 7. A cleaning emulsion useful to remove asphaltene and/or paraffin and scale simultaneously from oil wells, and which emulsion consists of: i) from about 25% to about 35% by weight, water;ii) from about 0.1% to about 5% by weight detergent;iii) from about 15% to about 35% by weight, hydrocarbon solvent;iv) from about 25% to about 35% by weight terpene hydrocarbon material;v) from about 0.000001 to about 0.00001% by weight demulsifier; andvi) optionally, from about 0.1% to about 5% by weight acid, with the proviso that said emulsion is in a stable state over a temperature range of from −20 F to 120 F. 8. The process as set forth in claim 7 wherein there is no acid present.
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이 특허에 인용된 특허 (13)
Von Krosigk, James R.; Duncan, Jr., William M., Acid based micro-emulsions.
Watkins David R. (Irvine CA) O\Donnell Edward J. (Huntington Beach CA), Self-breaking foamed oil-in-water emulsion for stimulation of wells blocked by paraffinic deposits.
Gardner Tommy R. (Duncan OK) Dill Walter R. (Duncan OK) Ford William G. F. (Duncan OK) King Karen L. (Duncan OK), Well treatment compositions and method.
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