METHOD TO HEAT GAS-LIQUID MIXTURE IN WELL TO PREVENT DEPOSITS OF PARAFFIN ON WALLS OF LIFTING PIPES Russian patent published in 2012 - IPC E21B37/00 

FIELD: oil and gas production.

SUBSTANCE: when realising the method, running circular heaters are installed at the end of a lifting pipe (LP), at least one, preliminarily on an LP connected with an electric centrifugal pump, holes are made designed to discharge of a heated gas-liquid mixture and paraffin from the inner cavity of the LP into the space upstream the electric centrifugal pump, additionally running circular heaters are placed on an LP installed above an electric centrifugal pump, at least one for realisation of additional heating of a gas-liquid mixture with paraffin, the LP is lowered with running circular heaters into a well to a bottom with a stop near upper perforation holes. At the same time the gas-liquid mixture moving inside the LP and in a circular space between a casing pipe and the LP is heated with running circular heaters.

EFFECT: increased efficiency of deposits prevention.

1 dwg