Reverse Circulation Drilling

Apart from standard reverse circulation drilling, Layne Christensen Company’s knowledge and experience is virtually unsurpassed in the application of the dual-wall reverse circulation method of drilling, for specialized needs in mineral exploration. Using dual-wall drill pipe, the sample, as drilled, is returned uncontaminated through the inner pipe to the surface sampling equipment. This technique and Layne's experience will maximize the geological sample recovery in adverse drilling conditions. Advantages include: The recovery of uncontaminated samples in high water-bearing formations, faster penetration than standard rotary or core drilling and lower cost due to increased production, reduced bit and mud additive costs. No Lost Circulation even through fractures, voids and joints. No Surface Casing as the outer pipe supports the borehole while circulation is maintained internally. Straighter Holes with flush joint pipe while drilling with minimum hole clearance.