METHOD OF ELIMINATION OF HYDRATE AND PARAFFIN-HYDRATE PLUGS IN WELLS AND DEVICE FOR METHOD EMBODIMENT Russian patent published in 2003 - IPC

FIELD: well operation, particularly, elimination of hydrate and paraffin-hydrate plugs. SUBSTANCE: method includes lowering of electric heater into well on cable connected with power source. Well conducting fluid located above plug is used as electrolyte for electric heater in melting of plug material. Electric heater electrode lower end is located in body of lower insulator occupying entire volume of heater located below upper end by lower insulator and comes in contact will well conducting fluid found in channels of lower insulator body and in lower part of electric heater body. Current control unit is cut in electric heater supply circuit for regulation of current value flowing over cable. When electric current passes through well conducting fluid found in channels of lower insulator, said fluid is heated and evaporated, and vapor is thrown to under lower part of electric heater and acting on plug melts it and heats well fluid above plug. EFFECT: excluded emergency sticking of cable in elimination of long plugs. 4 cl, 1 dwg