Wired geomagnetic guide while drilling and its measurement method

A measurement-while-drilling and guiding instrument technology, applied in construction and other directions, can solve the problems of shallow penetration depth, inability to meet the construction requirements of long-distance and large-depth guided drilling, and short penetration distance, achieving high measurement accuracy and easy popularization and application. Prospect, good construction effect
CN104060983BActive Publication Date: 2017-03-15HENAN HUABEI ENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HENAN HUABEI ENG TECH CO LTD
Publication Date
2017-03-15

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Abstract

The invention provides a wired geomagnetic guide while drilling and a measurement method, which uses the earth's gravitational field and geomagnetic field as reference points to establish a three-dimensional reference coordinate system, and uses inertial devices such as quartz flexible gravity accelerometers and fluxgate magnetometers as reference points. The measurement-while-drilling sensor calculates the drilling azimuth, pitch angle and drill face angle according to the measurement data of the measurement-while-drilling sensor. The special software package for the wired geomagnetic guidance instrument is used for engineering design before drilling. trajectory, and calculate and process the steering data, guide the drilling trajectory to track the design trajectory, record and print the drilling trajectory data table. The invention adopts ground power supply, the measurement data of the guiding sensor is transmitted by the cable, the measurement accuracy is high, the guiding is accurate, and the depth and distance of directional crossing are not limited, and it can meet the construction requirements of long-distance and large-depth guiding drilling.
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Description

technical field

[0001] The invention relates to a wired geomagnetic directional drilling system in a long-distance and large-depth directional crossing project, in particular to a measuring instrument based on a quartz flexible gravity accelerometer and a fluxgate magnetometer as a sensitive element for guiding and its measurement method. Background technique

[0002] In the directional crossing project, through the wired geomagnetic guided drilling system, the construction personnel can accurately know the depth, position, pitch angle, drilling azimuth and face angle of the current underground drill bit. By controlling the depth, position, pitch angle, drilling azimuth and drill face angle of the underground drill bit, the construction personnel can accurately control the steering drill to track the pre-designed drilling trajectory and realize directional crossing.

[0003] The depth and position of the underground drill bit are accurately calculated by the portable comput...

Claims

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