DRILL BITS

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       Selecting the correct drill bit defines the success of a drilling project.  Use the best bit, and a drilling contractor will have the most successful drilling project possible.  Use the wrong bit, the drilling contractor will have a less efficient drilling project.  Drilling inefficiently results in extra costs, loss of future projects to competitors, excessive wear and tear on drill rig and drill rods, and many other situations resulting in loss.  

 

       On Point HDD is proud to advise clients on IADC coding use.  Proper use and understanding of the IADC coding system is a must to be successful in selecting the best bit for the project.  Call On Point HDD and share your geo technical reports so that we can advise you, the client our #1 priority, on the selection of the best bit for your project.  With On Point HDD's IADC coding experience and understanding, we are absolutely your best choice for drill bit advisors.

 

 

 

 

 

 

 

 

 

 

 

 

 

IADC CODING EXPLAINED

 

       IADC is the International Association of Drilling Contractors.  This association represents the oil and gas drilling industry worldwide.  The coding that this association has developed is known as the IADC Code of a roller cone drilling tool.  This code is a 3 digit, hyphen separated number, sometimes followed by a 4th alphabetic character.  An example code is "IADC 4-2-5".  

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FIRST DIGIT:  This digit defines the formation that the tool is best designed for, from soft formation all the way to extremely hard formations. The first digit ranges in numbers from 1 to 8, with 1 being the softest formation and 8 being the most extremely hard formation.

   -  The numbers 1-3 are steel toothed bits, also known as Mill Tooth bits.  

   -  The Numbers 4-8 are tungsten carbide toothed bits, also referred to as just TCI bits. 

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SECOND DIGIT: further breakdowns which sub-formation the tool is designed for.  

   -  The second digit ranges from 1 to 4. 

   -  If the first digit is a 5 and the second digit is a 4, that would mean that the tool is the hardest formation 5 type.

   -  If the first digit is a 5 and the second digit is a 1, that would mean that the tool is the softest formation  5 type.

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THIRD DIGIT: defines the bearing/seal type.  The third digit ranges in numbers from 1 to 7.  

   -  1 means open bearing. 

   -  2 is open bearing/air cooled. 

   -  3 is open bearing with gauge protection. 

   -  4 is a sealed roller bearing. 

   -  5 is a sealed roller bearing with gauge protection.

   -  6 is a sealed journal bearing.

   -  7 is a sealed journal bearing with gauge protection.

 

FOURTH DIGIT (optional):   defines an additional feature.  The fourth digit is a letter, with 12 letter options.  

   -  A = Air Application.

   -  C = Center Jet.

   -  D = Deviation Control.

   -  E = Extended Jet.

   -  G = Extra Gauge Protection.

   -  J = Jet Deflection.

   -  R = Reinforced Welds.

   -  S = Standard Steel Tooth.

   - W= Advanced Cutting Structure.

   -  X = Chisel Insert.

   -  Y = Conical Insert.

   -  Z = Other Insert Shape.

 

The example above "IADC 4-2-5" would mean that the bit has aggressive shaped tungsten carbide teeth inserts to cut soft-medium rock, with a sealed roller bearing and with gauge protection.  An "IADC 8-4-7-G" would mean that the bit has low profile conical shaped tungsten carbide inserts to cut the most extremely hardest of rock formation, with a sealed journal bearing that has not only gauge protection, but extra gauge protection.  The extra gauge protection is known by the letter G as the 4th digit.