Hydraulic oscillator based on roller and impeller

The invention discloses an oscillator with drag reduction and increased speed and belongs to the fields of oil drilling and the like. According to the technical scheme, an upper joint, an outer shellbody and a lower joint are connected through screw threads in a threaded mode in sequence; a throttle...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	FAN CHANGYUE, TIAN JIALIN, HU XUEHUA, WEI LAI, HU ZHICHAO, GE TONGXU, WANG YANZHI
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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