Coal-bed gas well drainage and mining device

The utility model relates to a coal-bed gas well drainage and mining device which comprises a filter screen assembly, a cleaning assembly, a suction assembly and a back flushing assembly. The filter screen assembly is installed at the end of the suction pipeline assembly, the cleaning assembly is in...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	WANG CHONGJING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING NON-POSITIVE DISPLACEMENT PUMPS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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