Formation principle and influence of directional drill pipe
Release time:
2022-01-19
Near horizontal directional drilling technology is an advanced technology in the field of drilling engineering. It is applied in coal mines. It started in western developed countries such as the United States, Germany and Britain in the 1960s and 1970s. Many coal mines in China, such as Songzao, Tiefa, Huainan, Shanxi Yamei Daning and so on, also successively introduced this technology in the mid-1990s. At present, directional drilling technology is widely used in coal mines in China. It is a way of supporting wired measurement while drilling system for screw motor deviation. Because of its advantages of high precision, long distance and construction flexibility, this technology is mainly used in the construction of long directional drilling for gas drainage in underground rock strata and relatively stable coal seams and directional drilling for geological exploration. The important feature of wired MWD system is the signal transmission of pipe detection and receiving end by directional drill pipe. Therefore, the performance stability of directional drill pipe will have an impact on directional drilling construction. In the aspect of coal mine gas control, the kilometer directional drilling rig can realize long borehole directional drilling and control the drilling track, ensure the effective extension of the drilling track in the target layer, and can carry out multi branch hole construction. It has the advantages of high drilling efficiency, multi-purpose one hole。
The advantages of centralized pumping increasingly reflect the advantages. The real-time control of the azimuth, inclination and elbow direction of the front end of the directional drill pipe requires the measurement of the angle.
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