Boart Longyear

Directional drilling bits

Directional drilling bits are threaded onto down-hole motors and used in directional drilling applications. They have reinforced center ports and have an impregnated full face crown, and can also be used as an impregnated plug bit.The simultaneous erosion of the matrix and the diamonds makes the bit self sharpening.

Thread
Boart Longyear directional drilling bits feature threaded ports in the shank which allow plugs to be threaded to more closely regulate fluid flow.

Plug definition
Box Thread (R/B)
Pin Thread (R/P)

Matrix
Boart Longyear impregnated diamond bits are designed to manage an extremely wide variety of ground conditions.

Gauge Options
Directional bits are available in three standard gauge configurations.
Standard gauge (S)
Equal to reaming shell gauge (R)
Oversized (OS)

Shank options
Where applicable shank options such as threaded shank ports are available.

Size
Boart Longyear bits are available in all standard drilling thread types as well as a number of region-specific sizes.

Wedging Bits

Boart Longyear wedging tools are diamond products that are made to follow wedges set in the bore hole with the intention of altering the hole direction. They consist of surface-set wedge reamer, surface-set bullnose bits, and impregnated tapered crown core bits. These special profiles are required to avoid drilling straight through the wedge. The tapered crown profile is available in a taper varying from 1/4î to 7/16î.
Gauge Options
Wedging bits are available in standard gauge configurations.
Standard gauge (S)

Wedging Impreg depth
Boart Longyear wedging bits are currently available in 2 standard impreg depths of 9mm and 12mm.

Wedging Waterway option
Boart Longyear bits are available with two standard waterway configurations.
Double angle (DA)
Face discharge (FD)

Wedging Waterway size
Boart Longyear wedging bits offer the widest variety of waterway sizes in the industry.