Radialdrilling guide device for coal seam gas preliminary extraction hole

• Main Authors: XU TAO, ZHANG SHANGBIN, ZHANG CUILAN, SHEN DAFU, TAN LE, CHEN XINGYI, ZHOU JUNJIE, LI DONG, WANG LIAN, ZHOU DONGPING, GUO CHENYE
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2014
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The utility model discloses a radial drilling guide device for a coal seam gas preliminary extraction hole. The radial drilling guide device comprises a fixed disk and a movable guide part, wherein the fixed disk is provided with mounting holes used for fixedly connecting a rock wall; angle scales are formed on the outer disk surface of the fixed disk; the movable guide part comprises a transition disk; the transition disk is coaxially connected with the outer disk surface of the fixed disk through screws; screw connecting holes formed in the transition disk are arc kidney groove-shaped; an engraved groove is formed in the outer cylindrical surface of the transition disk; a stop tongue is formed on the surface of an inner hole of the transition disk; the transition disk is in sliding fit with a guide tube through the inner hole; a guide groove which is in clearance fit with the stop tongue is formed in the outer cylindrical surface of the guide tube; the guide tube consists of a bending tube and a straight tu