Guide positioning method and positioning instrument for horizontal directional drilling

Abstract

The invention discloses a horizontal directional drilling guiding position method and position indicator, which comprises the following parts: sensing emission probe in the guiding drilling tool, walking type position follower and driller monitor on the drill, wherein the sensing emission probe is composed of angle sensor, signal disposing and transmitting unit, solenoid coil and battery, which sends the measured the incidence, facing angle, temperature and other parameters to the follower through wireless electromagnetic wave; the position follower calls the parameter of underground probe to measure position and depth according to the signal relative strength distribution, whose final result is sent to the driller display through wireless pattern. The invention is convenient to operate for the driller personnel.

Description

technical field [0001] The invention relates to the field of trenchless horizontal directional drilling, in particular to a guiding and positioning method for horizontal directional drilling and a guiding and positioning instrument designed by the method. Background technique [0002] At present, the non-excavation horizontal directional drilling pipeline laying method is widely used. It is a construction method that uses a special horizontal directional drilling machine to drill in different formations and depths to lay underground pipelines in a controlled drilling trajectory. During construction, first use a directional drilling rig to drill a small-diameter pilot hole. During the drilling process, the borehole is extended according to the designed trajectory through monitoring and control means, and the surface is drilled from the other end. Then use a reamer to expand the borehole to the required diameter, and finally drag the pipeline to...

AI Technical Summary

Problems solved by technology

Although this method does not require complex signal cables, the signal transmission speed is relatively slow. It takes tens of seconds or even several minutes to complete the transmission of a measurement, which cannot meet the requirements of real-time drilling measurement.

At the same time, due to the use of mud pressure pulses, the generation and identification of mud pressure pulses require high technology, and an additional action mechanism is required in the drilling tool, which makes the structure of the drilling tool complex and the cost is high

[0006] For the positioning of drilling tools, because the underground environment itself has many insurmountable characteristics, the underground three-dimensional positioning technology is far more complicated than that on the ground. So far, there is no underground three-dimensional positioning technology in a complete sense.

At present, several assumptions of underground positioning systems have been put forward in the field of oil drilling and geological drilling at home and abroad, such as underground GPS (global positioning), underground radar and underground CT (computed tomography), etc., but these assumptions are not too complicated and the cost is too high , that is, the technical means are immature and cannot be put into practical use

[0007] To sum up, due to the particularity of underground work, many problems such as attitude parameter measurement and positioning and depth determination of horizontal directional drilling have not been well resolved, and domestic research in this area and related instruments are still in a blank state.

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