Drill stem rotation control device for oriented drilling

The invention discloses a drill stem rotation control device for oriented drilling.The drill stem rotation control device comprises a rotating shaft base and a rotating shaft connected with an upper drill stem.The upper portion of the rotating shaft base is arranged on the lower portion of the rotat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WU XUEPING, SONG JINCHU, LU ZHONGHUA, LIU QIANG, LU QING, FANG QIN, YANG HAIPING, LIU YANQIAN, XIANG GENCANG, HU XIAOKUI, ZHANG LIANGWAN, YOU YUNWU
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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Beschreibung
Zusammenfassung:	The invention discloses a drill stem rotation control device for oriented drilling.The drill stem rotation control device comprises a rotating shaft base and a rotating shaft connected with an upper drill stem.The upper portion of the rotating shaft base is arranged on the lower portion of the rotating shaft in a sleeving mode and sealed through a sealing bearing assembly.The lower end of the rotating shaft base is connected with a lower drill stem.A core shaft which can vertically move and is internally provided with a central through hole and externally provided with a spring is arranged in the rotating shaft.The central through hole of the core shaft, a central through hole of the rotating shaft and a central through hole of the rotating shaft base are communicated.The whole core shaft is located in the central through hole of the rotating shaft after being pushed by tension of the spring to move up, and therefore the upper drill stem and the lower drill stem are separated.The core shaft connects the rotat