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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What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.