Method for removing paraffin and asphaltene from producing wells

Details Method for removing paraffin and asphaltene from producing wells Method for removing paraffin and asphaltene from producing wells

1995-10-16

1997-06-24

Dang, Hoang C.

Wells

Processes

Heating, cooling or insulating

166 53, 166 57, 166 901, 166304, E21B 3600

Patent

active

056410220

ABSTRACT:
The basic method is to raise the temperatures of the tube, rod and liquid in the well into a range in which paraffin and asphaltene are removable by fluid flow in and from the well. The temperatures are raised by circulating the liquid through the well and a heat exchanger which heats the fluid which subsequently heats the well components. The well pump provides the circulation flow. In a preferred practice of the method, operation is such that the annulus of the well is essentially empty and the liquid recirculated until the difference between the temperatures of fluid flowing into the well and on the outer surfaces of the tube and fluid flowing out is within a desired range and then some of the fluid is diverted to storage while the remaining fluid is recirculated and heated to maintain the higher temperatures throughout the well as long as needed.

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