DRILLING ELECTRIC GENERATOR Russian patent published in 2013 - IPC H02K7/18 F04B47/02 

FIELD: electricity.

SUBSTANCE: it is proposed to replace counterbalances of a crank gear of a pumping unit with an electric generator of the same weight. The drilling electric generator is installed in a required point of a crank gear with the double purpose: as a pumping unit counterbalance and as an electric generator itself. Together with the crank relative to the generator axis one part of the generator rotates, for instance, a stator with windings of electromotive force induction. The other part of the generator - a rotor developing a magnetic field, remains fixed relative to the generator axis due to shift of its centre of gravity below the horizontal axis of the generator by the value required for free rotation of the stator around the fixed rotor.

EFFECT: expansion of operating capabilities, generation of additional power at a wellhead and its application on site for heating of oil production facilities.