Piston air valve type automatic pressure release valve of thermal production well

The utility model discloses a piston air valve type automatic pressure release valve of a thermal production well. The automatic pressure release valve comprises a valve body mounted on a needle type valve of a casing pressure gauge, wherein the valve body comprises two parts, namely an upper valve...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	PEI ZHENG, ZHAO CHUANGYE, CHENG JIAKUANG, LI LIHUI, XIONG FUHAI, LIU TAO
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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