A real-time positioning method and system for horizontal directional drilling based on ground magnetic beacon
A technology of horizontal directional drilling and real-time positioning, which is applied in directional drilling, drilling equipment and methods, and earth-moving drilling and mining, etc., can solve the problems of inability to arrange wire frames, low construction efficiency, restricted use, etc., so as to improve positioning efficiency and adaptability. range, improve construction efficiency, and achieve the effect of real-time positioning
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[0038] The present invention will be further described below in conjunction with drawings and embodiments.
[0039] The invention provides a real-time positioning method for horizontal directional drilling based on ground magnetic beacons, comprising the following steps:
[0040] (1) Equipment layout: Ground magnetic beacons are arranged near the design trajectory (or point to be measured) at the horizontal directional drilling construction site, and a solenoid-type electromagnet connected in series with a DC welding machine is used; the axis of the ground magnetic beacon and the design The projection of the drilling trajectory on the horizontal plane is roughly parallel;
[0041] The measuring sub-joint is connected between the drill bit and the drill pipe of the drilling tool. The measuring sub-joint includes a non-magnetic drill collar and a measurement module inside the non-magnetic drill collar. The measurement module includes 4 triaxial magnetometers and 1 triaxial magne...
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