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

Inactive Publication Date: 2017-10-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

The ground grid wireframe steering system needs to lay current-carrying wireframes above the entire design trajectory. It is inconvenient to implement in many complex construction sites, and even the wireframes cannot be arranged. The construction efficiency is low, which seriously restricts the use of this method

Method used

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  • A real-time positioning method and system for horizontal directional drilling based on ground magnetic beacon
  • A real-time positioning method and system for horizontal directional drilling based on ground magnetic beacon
  • A real-time positioning method and system for horizontal directional drilling based on ground magnetic beacon

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Embodiment Construction

[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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Abstract

The invention provides a system and a method for real-time positioning in horizontal directional drilling on the basis of a ground magnetic beacon. By the ground magnetic beacon and a measurement module mounted in a measurement pup joint of a drill, single-point measurement positioning can be realized. After arrangement of a ground solenoid electromagnetic beacon, positioning can be realized only by data returned from the measurement pup joint, repeated scanning and detecting on a drilling track is avoided, and distribution of grid line frames on a designed drilling track is avoided as well. Requirements on construction site conditions are low, positioning efficiency is improved, application range is expanded, the positioning method is simple in algorithm structure, and high positioning timeliness, quickness and convenience in operation and improvement of positioning efficiency are realized.

Description

technical field [0001] The invention relates to a real-time positioning method and system for horizontal directional drilling based on ground magnetic beacons, and belongs to the technical field of horizontal directional drilling guidance. Background technique [0002] Horizontal directional drilling not only realizes the laying of pipelines in the non-excavation field, but also can be used in the fields of geology, mining, metallurgy, petroleum, etc. to realize underground geological exploration and resource extraction. In addition, it is also widely used in various ground treatment and environmental protection projects, and even has broad application prospects in military affairs. In the process of horizontal directional drilling, the real-time positioning and guiding of the drill bit position is the key to ensure that the drilling trajectory is drilled according to the designed trajectory. At present, the commonly used positioning technologies in China include wireless g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/022E21B47/04E21B7/04
CPCE21B7/046E21B47/022E21B47/04
Inventor 邓国庆姚爱国龚正
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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