SE Series Bits

SE Series Bits

SE Series Bits

The SE Series is an open-bearing, tricone, tungsten-carbide insert (TCI) rotary drill bit. The SE allows for drilling in hard, abrasive formations such as homogeneous limestone, basalts, granite and chert, as well as softer formations such as shales, clays and sand. The arrangement and design of our top-of-the-line tungsten carbide inserts help provide maximum durability, reduce drill vibration and allow greater drilling weights and effective hole cleaning in consolidated and unconsolidated formations. Thompson's SE Series will help drillers achieve maximum penetration rates.


Size Range: 2 15/16” - 12 1/4”

SE 58: Hard Formation

For maximum penetration rates in harder formations, the SE 58 utilizes breakage resistant, projectile shaped in­serts. They are closely spaced for maximum bottom hole cleaning in hard, abrasive and homogenous limestone, dolomites, basalt, granite and chert.

COMPRESSIVE STRENGTHS: 12,000 - 20,000 (psi)
ROTARY SPEEDS: 40 to 80 rpm
DRILLING WEIGHTS: 4,000 to 7,000 (lbs/inch of bit diameter)
IADC: 712 - 742

SE 56: Medium Hard Formations

The SE 56 is adaptable to a wide variety of formations with higher compressive strengths, and is designed to per­form well in sandstone, limestone, hard shale and other formations with high abrasive qualities, numerous hard streaks and broken formations.

COMPRESSIVE STRENGTHS: 7,000 - 15,000 (psi)
ROTARY SPEEDS: 40 to 95 rpm
DRILLING WEIGHTS: 2,000 to 5,000 (lbs/inch of bit diameter)
IADC: 541 - 632

SE 54: Soft-Medium Formation

The SE 54 utilizes and offset with large chisel-shaped inserts spaced to provide high penetration rares in softer for­mations. Ir is extremely effective in shale, clay, sofc/medium limestone and ocher formations of relatively low com­pressive suengch with hard streaks or abrasive qualities.

COMPRESSIVE STRENGTHS: 5,000 - 12,000 (psi)
ROTARY SPEEDS: 45 to 100 rpm
DRILLING WEIGHTS: 1,000 to 5,000 (lbs/inch of bit diameter)
IADC: 521 - 532

SE 53: Soft Formation

The SE 53 utilizes a high offset thar fearures large chisel-shaped inserts co provide high penetration rares in the softest formations. Wide insert spacing allows effective hole cleaning in low compressive formations such as shale, clay, limestone and sand.

COMPRESSIVE STRENGTHS: 2,000- 10,000 (psi)
ROTARY SPEEDS: 45 to 100 rpm
DRILLING WEIGHTS: 1,000 to 3,000 (lbs/inch of bit diameter)
IADC: 441 - 512

  1. Bit Size
  2. Pin Size
  3. IADC Code
  4. REGULAR or JET Circulation*
  5. Air or Fluid Drilling

*If Jet Circulation, please include nozzle sizes in your description.