METHOD FOR DRILLING BORE-HOLES WITH TAKING ROCK SAMPLES Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: method relates to drilling bore-holes of various purpose including oil, gas, gas-condensate, etc. Drilling through rock matter is effected by energy of compressed working agent brought to bear on work face and on walls of bore-hole around work face. According to method, created in space of bore-hole is permanent surplus pressure due to outflowing of compressed working agent. This produces rising flow of drilling sludge containing crushed and desintegrated rock matter. Crushed rock matter is carried away from bore-hole mouth and placed in elongated hollow cylinder starting from its end. Length and bore of cylinder imitate bore-hole being drilled. Length of cylinder is larger than length of bore-hole being drilled by 10-25%, cross-sectional bore of cylinder is larger than cross-sectional size of bore-hole by 5-15%. Formed from extracted rock matter is mirror-like cross-sectional size and length of drilled bore-hole that is in reverse to direction of drilling. After that, rock matter is investigated. Application of aforesaid method allows for performing continuous process of drilling and taking samples of rock matter with high productive capacity. EFFECT: higher efficiency. 1 cl