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.

 

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

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

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

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