Electric slide valve switch control device

The invention relates to the technical field of oil exploration and development, in particular to an electric slide valve switch control device which comprises an ash discharging short section, a short section connector, a piston locking mechanism and a control short section. At least one ash discha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NIU ZHANSHAN, LU BINCHANG, TANG QINGJUN, QIAN QIAOYA, DUAN WENGUANG, JIA WUQIANG, MI HONGXUE
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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