Coaxial bidirectional rotating drill bit

The invention discloses a coaxial bidirectional rotating drill bit which comprises an outer drill bit body, an outer drill bit body connecting shaft, an inner drill bit body, an inner drill bit body connecting shaft, an inner drill bit body runner pipe, a coaxial steering mechanism and a power conve...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YANG JUNQI, CAO WENYANG, CAI CAN, XIE QUANGONG, FAN KANGKANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	The invention discloses a coaxial bidirectional rotating drill bit which comprises an outer drill bit body, an outer drill bit body connecting shaft, an inner drill bit body, an inner drill bit body connecting shaft, an inner drill bit body runner pipe, a coaxial steering mechanism and a power conversion mechanism. Drilling fluid flows in from a drill bit inlet and is divided into an inner flow channel and an outer flow channel through rotation of an impeller, the inner flow channel is composed of an inner and outer drill bit connecting shaft inner cavity, an inner drill bit flow channel pipe and an inner drill bit nozzle, and the outer flow channel is composed of an annulus, an outer drill bit annulus cavity and a nozzle. Meanwhile, drilling fluid impacts the impeller, drives the impeller to rotate, drives the lower gear of the coaxial rotating mechanism to rotate, drives the inner drill bit to rotate, transmits torque through the gear, and reversely rotates the upper gear and the outer drill bit to rotate.