Directional drilling can involve both the initial pilot hole and enlarging the hole by the reaming technique.
A pilot hole is typically small diameter that is first drilled during horizontal directional drilling (HDD) before the hole is enlarged. A pilot hole is drilled from the entrance pit to the exit pit and is directionally controlled to cover the desired route.
Reaming is the process of enlarging an existing hole and is a regular part of any underground drilling project. A hole can be reamed either in a forward or backward direction.
Cenerg directional drilling range includes range of Pilot Rotary Bits and both forward and back reamers
Pilot Bit sizes range from 5 1/2” to 12 1/4” - Medium, Hard to Very Hard Formation Bits - Journal Bearing Package - Tungsten Carbide Insert and Mill Tooth Designs
Back Reamers size range from 10” to 72” - Medium, Hard to Very Hard Formation Cutting Structure - Journal Bearing Package
Forward Reamers size range 8” to 12” - Medium, Hard to Very Hard Formation Cutting Structure - Journal Bearing Package