Drilling tool for coal mine gas extraction hole

The utility model discloses a drilling tool for coal mine gas extraction drilling, which comprises a hollow drill rod and a drill bit, a while-drilling support mechanism is arranged in the hollow drill rod, and a directional drilling mechanism is arranged at the position of the drill bit. The while-...

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Bibliographische Detailangaben
Hauptverfasser:	WAN JINKUANG, LIU XIAOXIAN, WU MANYUAN, QU YONGLI, WANG NING, LIU CHANGLAI, WANG ZUANYAN, WU JIE, LEI MENGLI, WANG SHIBIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The utility model discloses a drilling tool for coal mine gas extraction drilling, which comprises a hollow drill rod and a drill bit, a while-drilling support mechanism is arranged in the hollow drill rod, and a directional drilling mechanism is arranged at the position of the drill bit. The while-drilling supporting mechanism comprises a first air cavity, a first piston body, a second piston body and a resistance ring which are sequentially arranged in the hollow drill rod in the drilling direction, a spring is arranged between the first piston body and the second piston body, and a plurality of supporting components are arranged between the second piston body and the resistance ring. The directional drilling mechanism comprises a collimation probe tube, a groove is formed in the outer wall of one end of the collimation probe tube, a collimation detection component is arranged at the other end of the collimation probe tube, a second air cavity and a third air cavity are formed in the collimation probe tube,