Patent ID: 11946350
Assignee: CHINA NATIONAL PETROLEUM CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. The method for remotely shutting down the downhole unit of the rotary steering system from the ground, as recited in claim 1, wherein in the step e, the diverting flow automatically reaches the set diversion ratio through specific steps of: after the downlink device receives the set diversion ratio, calculating a required opening area of the throttle valve of the downlink device according to a calculation formula, and then obtaining a required opening degree of the throttle valve according to the relationship between the opening degree and the opening area S1 of the throttle valve; according to a corresponding relationship between the required opening degree of the throttle valve and an analog electrical signal, outputting a current signal, so as to reach the set diversion ratio through automatic adjustment of the throttle valve of the downlink device.