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SOFT (SHALE-TYPE) CUTTER
For use in soft formations
having low compression strength
and high drillability, like soft
lime and shale.
This roller's teeth are
hardened, carburized, quenched
and tempered for maximum life. |
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HARD (ROCK TYPE) CUTTER
Applicable in hard, extra-hard,
abrasive, and semi-abrasive
formations, like hard sand,
chert, or granite. This
button cutter features tungsten
carbide compacts which act as
teeth and fracture the
formation. Bearing
surfaces are specially treated
for long cutter life. This
roller cutter is recommended for
air and gas. |
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MEDIUM (CHERT-TYPE) CUTTER
Use in medium to medium-hard
formations with high compressive
strength, like dolmite, hard
lime, and chert where a
crunching action is required.
Teeth are carbanized and ground
to gauge. Grooves on the
face of the teeth are hardened.
Due to the increased area of
wall contact, this cutter is
recommended for string reamer
application as a stabilizer. |
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SMOOTH ROLLER
Used in directional drilling for
low torque stabilization,
without cutting. This
roller is hardened and
carburized. |