Drilling anti-jet orifice device

The utility model relates to a drilling anti-jet orifice device, which comprises a drilling casing, a shunt mechanism consisting of a shunt cavity and a deslagging pipe with a valve, an exhaust pipe with a valve, and a fixed pipe, wherein the inner diameter of the drilling casing is larger than the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CHENG CHUNYUAN, LI ZHIQIANG, LI TONGWEN, CHEN JUN, YANG BINGTAO
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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