METHOD FOR OIL HOMOGENIZING IN WELL INTER-PIPE SPACE Russian patent published in 2021 - IPC E21B43/00 B01F13/00 

FIELD: oil and gas industry.

SUBSTANCE: said method is designed for application in oil producing and water supply well; the products thereof are characterized by increased content of associated petroleum or other gas. It can be used by oil producing companies to improve the operation efficiency of down-hole pumping equipment, for example, electric centrifugal pumping plants. The method consists in arranging the rotational movement of oil in one direction and changing the same movement in the opposite direction while maintaining one-way forward movement relative to the pipeline axis; moreover, from the submersible pump to the minimum possible value of the dynamic oil level in the annulus, evenly along the length of the tubing, pairs of spiral-shaped couplings with the maximum possible external diameter, at which the clearance between the collar and the casing is minimum permissible, are installed on the pipes next to each other and back to back, one of which arranges the forward movement of oil in the annular space by one-way rotating in a spiral around the circumference, and the second arranges the similar movement by rotating the oil in the opposite direction. Alongside with that, the couplings with the homogenization function are installed below the coupling joint of the pipe string and are fixed immovably with the pipe by means of a ring. The positive effect is achieved by the fact that turbulization and homogenization of three possible oil flows occurs in a narrow annular space at the junction of two couplings, that is, two counter-rotating oil flows and linear oil movement along a narrow annular space.

EFFECT: homogenization of oil ensures decreasing the flow of associated petroleum gas portions into the gas space, excluding rapid increase in gas pressure above the dynamic level and contributing to long-term and trouble-free operation of the deep-well pump.

1 cl, 1 dwg