Entry and Exit Angles

Generally the entry angles should be held between 8 and 16 degrees from horizontal, although entry angles up to 24 degrees have been used on some projects. These boundaries are due chiefly to equipment limitations. The preferred drill path is made up of straight tangent sections before the introduction of any curves. The radius of the curve is determined by the bending characteristic of the product pipeline or in some cases the drill-rod pipe. The curve usually brings the drill-path profile to the elevation that meets the design depth requirements for crossing the obstacle. Long horizontal runs can be made at this elevation before curving up towards the exit point. Exit angles should be designed to allow easy break-over support. The exit angle should not be so steep that the pull section must be severely elevated in order to guide it into the drilled hole. Usually the exit point angles are between 5 and 10 degrees.

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Responses

  • William
    What is an exit angle?
    4 years ago
  • neftalem
    Do a preliminary pipe layout entry angle of 8 to 16 directional drill?
    12 months ago
  • rina
    How to figure entry angle of a bore?
    7 months ago
  • Ambrogio
    How to calculate the drill entry angle for a horizontal directional drill?
    7 months ago
  • lalia
    How to calculate entry angle for horizontal directional drilling?
    6 months ago
  • Maria Teresa Lombardi
    How to calculate elevation on a road bore?
    4 months ago
  • martina
    What angles can be used for bore entry and exit?
    4 months ago
  • KLAUS BRAUN
    What is the maximum directional bore angle for HDPE (SDR11) Pipe?
    3 months ago
  • curzio
    Is a hdd bore angle from horizontal?
    24 days ago

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