OIL WELL HEATER Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: device has current source, output cable, and heating cable. Current-conductive filaments of heating cable on one end are connected to each other, and by other ends via output cable are connected to current source. Parameters of said current source, output cable and heating cable are linked by following relation: where L_k - length of heating cable, L - total length of heating and output cables, U - current source voltage, - power coefficient, R₀ - active resistance of one meter of phase (current-conductive line) of heating cable, R₁ - active resistance of one meter of phase (current-conductive line) of output cable, P₀ - active power, consumed by one meter of heating cable. Output cable passes through well mouth and downwards into well along hoisting pipe and is electrically connected to heating cable placed in the well. Brackets connect cables to hoisting pipe, placed inside casing pipe, with even spaces.

EFFECT: higher efficiency.

1 dwg