WELL DRILLING METHOD Russian patent published in 2019 - IPC E21B7/00 E21B4/02 

FIELD: drilling of soil and rocks; mining.

SUBSTANCE: invention relates to the field of mining operations, namely, to the well drilling method. Well drilling method involves lowering the downhole hydraulic motor into the well, which consists of a stator with semi-cylindrical blades and a hollow rotor forming a working chamber, and supply of flushing fluid. Working chamber is equipped with a bottom attached to the stator. Between semi-cylindrical blades working chamber is divided by circular wall into outer parts in front end of rotation, smooth turning into internal parts. Bottom of outer part of working chamber is made with transverse ledge with exceeding of semi-cylindrical blades towards inner surfaces. Flushing fluid is directed to bottom of outer part of working chamber in direction of stator rotation. Side radial channels are pierced on rotor with inlet facing towards movement of flushing liquid from inner part of working chamber and outlet - into rotor cavity.

EFFECT: enabling achievement of high energy characteristics of well drilling method on volume of supplied flushing liquid.

1 cl, 1 dwg