Patent ID: 11946342
Assignee: SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 8:
9. The drilling tool according to claim 1, wherein a turbine power unit for driving the power rotary shaft to rotate around an axis of the turbine power unit is arranged in the inner chamber of the outer cylinder, and comprises:
a turbine assembly disposed in an annulus formed between the power rotary shaft and the outer cylinder, the turbine assembly having a stator fixedly connected to the outer cylinder, and a rotor fixedly connected to the power rotary shaft; and
a flow passage hole arranged on the power rotary shaft and passing therethrough,
wherein fluid injected into the annulus formed between the power rotary shaft and the outer cylinder drives the turbine assembly so that the rotor of the turbine assembly drives the power rotary shaft to rotate around the axis of the power rotary shaft, and then passes through the flow passage hole to enter into the inner chamber of the power rotary shaft, and flows downward through the transmission shaft and the output main shaft.