Milled Tooth Bits
Rotary drilling bits consist of three primary components; the cutters, internal bearings, and the bit body. The cutter teeth are milled steel.
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Soft to Medium Soft Formations T4
The T4 is designed with high cone offset and longer, widely
spaced teeth to provide maximum penetration in the medium soft
to soft formations such as shales, clays, soft sandstones, and
red beds. Also effective in other soft to medium formations with
relatively low compressive strengths. Compressive Strengths – 1,000 to 5,000 PSI Operation Weights – 1,000 to 3,000 lbs. per inch of bit diameter Rotary speeds – 60 to 110 RPM Decreased Speed As Weight is Increased IDAC Code Range – 131-142 |
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Medium Formations T3
Medium to medium hard formations such as hard sandstones,
limestone, and broken formations with hard, cherty streaks may
require the T2. Short, closely spaced teeth, applied with
tungsten carbide hard-facing help reduce vibration through the
harder formations. Compressive Strengths – 3,000 to 6,000 PSI Operation Weights – 1,000 to 4,000 lbs. per inch of bit diameter Rotary speeds – 50 to 110 RPM Decreased Speed As Weight is Increased IDAC Code Range – 211-232 |
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Medium to Medium Hard Formations T2
The S.E. 54 utilizes a high offset with features large
chisel-shaped tungsten carbide inserts to provide high
penetration rates in the softest formations. It is extremely
effective in shales, clays, soft to medium limestone, and other
formations of relatively low compressive strength with hard
streaks or abrasive qualities. Compressive Strengths – 4,000 to 9,000 PSI Operation Weights – 2,000 to 5,000 lbs. per inch of bit diameter Rotary speeds – 40 to 110 RPM Decreased Speed As Weight is Increased IDAC Code Range – 241-312 |
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Hard Formations T1-H
The T1-H is designed for hard, abrasive formations such as hard
sandstone, dolomite, hard limestone, and granite. The outer
gauge rows have webs joining adjacent heel teeth, which are
heavily applied with tungsten carbide hard-facing to provide
maximum resistance to gauge wear. Compressive Strengths – 8,000 to 14,000 PSI Operation Weights – 2,000 to 5,000 lbs. per inch of bit diameter Rotary speeds – 40 to 90 RPM Decreased Speed As Weight is Increased IDAC Code Range – 321-342 |
