CONNECTION ASSEMBLY FOR DIRECTIONAL DRILLING

摘要

Drill stem elements and connections are shown with advantages such as being mechanically robust. The absence of a side access window in a sonde housing is one design feature that provides robust mechanical properties. Further advantages of the sonde housings include being easy to disassemble for acces s to the sonde unit, or for insertion of the sonde unit. In one embodiment, a cap portion is easily secured or removed using a small allen wrench, or a hammer and a punch. The cap portion is not substantially affected or tighten ed by rotation of the drill stem during a drilling operation. A further advanta ge includes the ability to remove cap portions and pull back flexible product such as polyethylene pipe from a small exit pit.