MILLED TOOTH (MT) BITS

Thompson International takes pride in manufacturing a versatile range of open-bearing, tricone Milled Tooth Bits. Our MT Bits are available in a range of formations, which allows for drilling in hard, abrasive formations such as sandstone, dolomite and granite, as well as softer formations such as shales, clays and red beds. Our specialized tungsten carbide hard-facing helps provide maximum resistance to gauge wear and reduces vibration through harder formations. Thompson’s Milled Tooth design will help drillers achieve maximum penetration rates.

Category:

Description

Size Range: 2 7/8” – 10 5/8”

Tl-H: Hard Formation

The T1-H is designed for hard, abrasive formations such as hard sandstone, limestone, dolomite 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- 14,000 (psi)
ROTARY SPEEDS: 40 to 90 rpm
DRILLING WEIGHTS: 2,000 to 5,000 (lbs/inch of bit diameter)
IADC: 321 – 342

T2 : Medium-Hard Formation

Formations such as hard sandstone, limestone and broken formations with hard streaks may require the T2. Short, closely spaced teeth applied with tungsten carbide hard-facing to help reduce vibration through harder formation.

COMPRESSIVE STRENGTHS: 4,000 -9,000 (psi)
ROTARY SPEEDS: 40 to 100 rpm
DRILLING WEIGHTS: 2,000 to 5,000 (lbs/inch of bit diameter)
IADC: 241 -312

T3 : Medium Formation

The T3 performs well in unconsolidated shale, medium/soft limestone, medium sandstone and other formations of slightly higher compressive strength with intermittent hard streaks.

COMPRESSIVE STRENGTHS: 3,000 -6,000 (psi)
ROTARY SPEEDS: 50 to 100 rpm
DRILLING WEIGHTS: 1,000 to 4,000 (lbs/inch of bit diameter
IADC: 211 -232

T 4 : Soft Medium-Soft Formation

The T4 is designed with high cone offset and longer, widely spaced teeth to provide maximum penetration in soft-medium formations such as shale, clay, soft sandstone, red beds and other soft formations with low compressive strengths.

COMPRESSIVE STRENGTHS: 1,000 – 5,000 (psi}
ROTARY SPEEDS: 60 to 110 rpm
DRILLING WEIGHTS: 1,000 to 3,000 (lbs/inch of bit diamete
IADC: 131 – 142