A ground instruction transmission method for controlling rotary steering drilling tool and an apparatus for the same

Abstract

The invention provides a ground instruction transmission method for controlling rotary steering drilling tool which comprises the following steps: (1)a ground control system gives out a ground control instruction; (2)a slurry pump pumps over slurry; (3)after an instruction transformation unit transforms the instruction into time flow variation parameters, the time flow variation parameters will be transmitted to a slurry flow control valve; (4)the slurry control valve shunts the slurry which is pumped over by the slurry pump as described in step(2); (5)an instruction-parsing unit of the rotary steering drilling tool parses the ground control instructions; (6)a control unit of the rotary steering drilling tool controls the movement of the rotary steering drilling tool. The present invention also provides an apparatus to implement the aforementioned method. The present invention can safely and reliably transmit the ground control instruction to the rotary steering drilling tool. In the instruction transmission process, the slurry pump does not need to stop working, which can greatly enhance effectiveness and avoid the underground failure caused by rock fragments accumulation. And due to the high controllability of the time flow, the control accuracy of the present invention is greatly improved.

Description

technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a method and device for transmitting ground commands for controlling a rotary steerable drilling tool. Background technique [0002] In oil drilling operations, rotary steerable drilling tools have been widely used in oil exploration and development operations. The existing method for sending commands on the ground is to first stop the drilling of the rotary steerable drilling tool, and then "turn off" and "turn on" the mud pump to form mud pulses of "0" and "1", and then pass the "off" and "on" mud pulses, and then pass the The times of "on" and "off" mud pumps are combined and coded to form a specific code for the downlink of ground commands. The main disadvantage of this method of command transmission is: the rotary steerable drilling tool must be stopped from drilling before the command can be transmitted, which will result in prolonged drilling time, red...

AI Technical Summary

Problems solved by technology

The main disadvantage of this command transmission method is that the rotary steerable drilling tool must stop drilling before the command can be transmitted, which will result in prolonged drilling operation time, reduced efficiency, and increased operating costs

Moreover, when the mud pump is stopped, the cuttings produced during the drilling of the rotary steerable drilling tool will gradually deposit due to the stop of the pump and adhere to the surface of the tool, which may cause downhole accidents such as drill sticking when drilling.

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