METHOD OF WELL OPERATION Russian patent published in 2012 - IPC E21B7/00 E21B21/00 

FIELD: mining.

SUBSTANCE: method consists in rotation and internal feed of composition with a chisel and mud feed through the composition shank bore down the place for lifting and case hardening. Drilling is performed by means of hydraulic downhole motor. Upon reaching a zenith angle of 25° and at risk of sidewall sticking, at regular intervals of 0.5-1.5 hours, the drill string reciprocation to the drill tube's dimension plus 1.0-2.5 m with the simultaneous drill string rotation in a range of 20-40 r/m is carried out. For this purpose, the drilling fluid with density of 1.0-1.4 g/cm³ is used, and circulation rate is set in a range of 16-45 l/s.

EFFECT: invention ensures well-drilling without sidewall sticking.

1 dwg, 1 ex