RELIEF VALVE

FIELD: oil and gas industry.SUBSTANCE: invention relates to the drilling and repair of oil and gas wells and can be used to isolate trouble zones when drilling wells. Relief valve, located above the expansion head and below the hydraulic jack, comprises a hollow body and a hollow stem inserted teles...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Kozlov Aleksej Aleksandrovich, Kozlov Denis Alekseevich, Sadykov Alfred Fajzrakhmanovich, Kalimullin Damir Mirzakramovich
Format:	Patent
Sprache:	eng ; rus
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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