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  • [News] Trenchless directional drilling construction process-3

    Trenchless directional drilling construction process-3 Towing pipeline(1) After the welding of the crossing pipe section is completed, connect the drag head at the pipe end and separate each pipeline to avoid staggering.(2) Connection of pipeline and drilling tool: drill pipe + φ500 reamer + 50t rot

    2020-10-16
  • [News] Trenchless directional drilling construction process-2

    Trenchless directional drilling construction process-2 Pre-enlargingAfter completing the pilot hole work, start the pre-expansion. According to the actual situation of the project and the technical requirements of the horizontal directional drilling crossing construction, the pipeline expansion is c

    2020-10-13
  • [News] Trenchless directional drilling construction process-1

    Trenchless directional drilling construction process-1 The directional drill crosses and controls the direction. In the process of pilot hole drilling, the wireless direction control system is used, and the ground beacon system is arranged on the center lines of both sides of the entry and exit poin

    2020-09-25
  • [News] Requirements for supporting a lubricating medium

    Requirements for supporting a lubricating mediumThe requirements for supporting a lubricating medium can be calculated according to the law of friction.Summary of friction lawIn addition to rolling friction, which is not discussed here, friction can be divided into:A) Adhesive friction (same as stat

    2020-09-22
  • [News] Mud technology in trenchless construction

    Mud technology in trenchless constructionIf the blade foot is slightly larger than its size corresponding to the outer diameter of the pipe, it is possible to reduce the frictional resistance of the outer wall of the pipe. This prevents the upper layer from directly pressing on the tube body. As lon

    2020-09-17
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