Anti-theft opening device for wellhead valve of oil field

The utility model discloses an oil field well mouth valve anti-theft opening device which comprises an outer sleeve and an adapter, the outer sleeve is in a cylinder shape, the outer sleeve is rotatably arranged outside the adapter in a sleeved mode, and a protective cap is rotatably arranged on the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HU TIEGANG, ZHANG FENGRUI, ZHENG YALI, CHEN GUANGXIN, WANG JIANWEI, YANG DONG, LI YING, BIAN CHENXU
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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