METHOD FOR BIT COOLING DURING WELL DRILLING, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2012 - IPC E21B21/00 

FIELD: oil and gas industry.

SUBSTANCE: during the method's implementation the formation water with dissolved salts contained in it in the amount of 30-60 g/l are treated in disintegrator; minerals are crushed to powder with particle size of 10^-5-10^-7 m; water and powder, which have been treated in disintegrator, are mixed in the first reservoir in proportion of 5-30 vol %, and dispersion mixture (DM) is obtained. The third reservoir is inserted into the second reservoir so that they have similar volumes and one common side surface which is electroconductive diaphragm; diaphragm is grounded; cathode is inserted into the second reservoir; and anode is introduced into the third capacity. DC voltage supplied to cathode and anode creates electric field intensity with the value of 1000-20000 V/m; DM is pumped during 5-30 minutes along the contour including the first and the second capacities; water is pumped along the outline including the third reservoir and water cooling device; DM is pumped to the well.

EFFECT: reducing the cost, increasing efficiency of driving per bit travel.

2 cl, 1 dwg