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...

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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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Beschreibung
Zusammenfassung:	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 outer diameter of a drill stem, the shunt cavity is a hollow cavity, one end of the drilling casing is fixedly connected with a baffle with an orifice at the central part, the orifice is coaxial with the drilling casing, the diameter of the orifice is larger than that of the drill stem for the inlet of the drill stem, the other end of the drilling casing is fixedly communicated with one side surface of the shunt cavity, the deslagging pipe is communicated with the bottom of the shunt cavity, one end of the fixed pipe is communicated with the opposite side surfaces connected with the drilling casing on the shunt cavity, and the other end of the fixed pipe is fixed on a coal body wall or a rock wall and is perpendicu