Oil well cleaning compositions
OwnerRichard J. DYERinventor
Life of this patent
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Abstract
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.
Claims25
A one step process for removing both asphaltenes and/or paraffins and scale simultaneously from an oil well containing clogged perforations or openings comprising the steps of:
- a. preparing a cleaning emulsion comprising:
- i) from about 10% to about 40% by weight, water;
- ii) from about 0.10% to about 15% by weight, detergent;
- iii) from about 10% to about 40% by weight, hydrocarbon solvent;
- iv) from about 10% to about 40% terpene hydrocarbon material
- v) from about 0.000001 to about 0.00001% by weight, demulsifier;
- and
- vi) 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.
- b. contacting said emulsion with the interior of the oil well for a period of time sufficient to dispense asphaltines, paraffins and scale within the well from said openings.
A method of cleaning an oil well containing asphaltene and/or paraffin and scale to increase oil flow therefrom comprising the steps of:
- a. adding a cleaning emulsion consisting essentially of water, a detergent, a hydrocarbon solvent, a terpene hydrocarbon material, a demulsifier, and, optionally, an acid into the oil well containing a tubing string;
- b. coupling a surge and pressure wash tool to said tubing string of the oil well;
- c. moving the surge and pressure tool to the bottom of said oil well;
- and
- d. raising the surge and pressure wash tool after a reasonable period of time, thereby providing a period of contact under pressure and vacuum of said emulsion with said asphaltene, paraffin and scale.
A cleaning emulsion useful to remove asphaltene and/or paraffin and scale simultaneously from oil wells comprising:
- 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;
- and
- vi) 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.
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;
- and
- vi) 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.
Dependencies are inferred from the claim text.