FIELD: mining.
SUBSTANCE: method of well shaft drilling parameter evaluation involves monitoring of actual orientation of controlled downhole motor end during drilling by monitoring of drilling operation parameter indicating deviation of actual orientation of the said end from preset orientation. For that purpose, deviation of actual orientation of the said end from preset orientation is registered in multiple time moments during well drilling, and each deviation is evaluated and assigned a relevant value indicating drilling parameters at the respective time moment when respective deviation was registered. Further a final indicator is obtained based on value summing and indicating a degree of retention of actual controlled downhole motor end orientation in right position in multiple time moments during drilling, and the final indicator is submitted to evaluation unit.
EFFECT: enhanced accuracy of drilling tool direction evaluation.
13 cl, 6 dwg
