METHOD FOR STABILIZING DIRECTION OF BORE-HOLE Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: this can be used in drilling bore-holes with taking samples and in prospecting for deposits of solid minerals. in realization of method performed are following operations: lowering into bore-hole of coring assembly which is made up of drilling bit, coring pipe and adapter, drilling with taking sample, removing sample to surface inside coring assembly, visual determination of place of contact between coring pipe and wall of bore-hole during drilling, and correction of parameters of coring assembly, calculation of point of deflection of coring pipe at place of contact between coring pipe and wall of bore-hole according to determined relation, correction of parameters of coring assembly by resorting to deformation of bending of coring pipe at point of its deviation at place of contact with wall of bore-hole in opposite direction that is away from place of contact through value calculated according to determined relation. Application of aforesaid method helps reduce intensity of deviation, improves efficiency of operations, and reduces cost of bore-hole drilling procedure. EFFECT: higher efficiency. 2 dwg