Whirlwind type jet drill bit

The utility model discloses a whirlwind type jet drill bit which comprises a drill bit body with a hollow cavity. A sample taking opening which is communicated with the hollow cavity is formed in the middle of the end portion of the drill bit body, a cutting tool bit which is used for drilling and s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI QIULIN, LV GUICHUN, KANG JIANNING, LONG QINGMING, ZOU YINHUI, WANG YISHU, LI JIANGONG, LIU SHENG, HAN CHENGQIANG, WEN GUANGCAI, HU QIANTING, MOU JINGSHAN, LEI HONGYAN
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
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Beschreibung
Zusammenfassung:	The utility model discloses a whirlwind type jet drill bit which comprises a drill bit body with a hollow cavity. A sample taking opening which is communicated with the hollow cavity is formed in the middle of the end portion of the drill bit body, a cutting tool bit which is used for drilling and sampling is arranged on the end portion of the drill bit, a rotational flow jet hole which is communicated with the hollow cavity is formed in the position, close to the cutting tool bit, of the wall of the drill bit body, and the central line of the rotational flow jet hole and the axial line of the drill bit body are mutually intersected in space. The whirlwind type jet drill bit jets out rotary compressed air to enable slack coal to be pressed into a sampling channel, sampling can be fast and accurately conducted, sampling time can be saved and is saved to be about 2-5minutes, sampling depth is improved to be above 100m, coal sampling working efficiency and safety are improved, and gas disaster accidents are redu