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

A technology for rotary steerable drilling and tools, applied in directional drilling, earth-moving drilling, flushing wellbore, etc., can solve the problems of deposition, adhesion to the surface of tools, prolonged drilling operation time, increased operation cost, etc., and achieves simple structure and controllable The effect of improving precision and improving efficiency

Active Publication Date: 2011-04-20
CHINA NAT OFFSHORE OIL CORP +1
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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,

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

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Embodiment Construction

[0027] The present invention comprises the following steps:

[0028] (1) The ground control system sends ground control commands to the mud pump and command conversion unit;

[0029] (2) The mud pump is started under the control of the ground control system to pump mud to the rotary steerable drilling tool;

[0030] (3) The command conversion unit receives the ground control command sent by the ground control system, converts the command into a time flow change parameter, and sends it to the mud flow control valve;

[0031] (4) The mud flow control valve acts according to the time flow change parameter sent by the instruction conversion unit, and diverts the mud pumped by the mud pump in step (2);

[0032] (5) The command analysis unit in the rotary steerable drilling tool receives the diverted mud, and analyzes the ground control command according to the time flow change of the mud;

[0033] (6) The instruction analysis unit sends the analyzed surface control instruction to...

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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...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B21/08
Inventor 郭云周忠贵菅志军兰洪波尚捷肖亚辉张玉霖王红亮贾建波张冠祺朱伟红孙师贤孟巍冉志远
Owner CHINA NAT OFFSHORE OIL CORP
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