Patent ID: 7681638

Claim:
A method of reducing wax deposition in a wellbore tubing of an oil well, the method comprising: a) providing an aqueous biological slurry comprising at least one microbe capable of degrading paraffin wax at a temperature in the range of about 20-45° C., and a nutrient medium comprising at least one carbon source selected from the group consisting of glucose, sucrose and fructose, an oxygen slow-releasing compound selected from the group consisting of calcium peroxide or magnesium peroxide, and other components including minerals, organic solvents, vitamins, trace elements, an organic wax-solubilizing agent and water; b) providing an oil wellbore completion comprising a production tubing having an interior surface comprising a zone that is susceptible to paraffin wax deposition when the oil well is operated to produce oil; c) while oil production from the oil well is stopped, incubating said biological slurry in said zone for a period of time sufficient to multiply said at least one microbe and form a biofilm on at least said zone.