METHOD OF WELL DRILLING WITH SIMULTANEOUS CASING Russian patent published in 2024 - IPC E21B7/20 

FIELD: mining.

SUBSTANCE: invention relates to mining equipment, namely to a method of drilling wells with simultaneous casing and can be used in construction. Method of drilling a well with simultaneous casing includes destruction of the central part of the well bottom by means of a percussion-rotary action on it with a working tool adapted to extract it from the well, with simultaneous movement of the casing pipe towards the bottom under the action of impact pulses transmitted to its lower end outside the well, using for this purpose percussion mechanisms in the mounting device fixed on the outer surface of the casing pipe. Peripheral part of the bottomhole is destroyed by a toothed shoe of the casing pipe, rotating it using the above percussion mechanisms, each of which is installed at an angle of not more than 20° to its axis in vertical position.

EFFECT: providing action on the peripheral part of the face with a serrated shoe, reducing power consumption, using less complex, expensive, and more repairable mechanisms.

1 cl, 1 dwg