• THROOP ROCK BIT IADC Codes

    (International Association of Drilling Contractors)

    1 - 3

    1: STEEL TOOTH SOFT (TR3)

    2: STEEL TOOTH MEDIUM (TR2)

    3: STEEL TOOTH HARD (TR1 & TR1H)

    1 - 4

    FURTHER FORMATION BREAKDOWN​

    1 - 7

    BEARING / SEAL / GAUGE WEAR

    4 - 8

    4: INSERT VERY SOFT

    5: INSERT SOFT

    6: INSERT MEDIUM

    7: INSERT HARD

    8: INSERT VERY HARD

    1: SOFTEST

    4: HARDEST

    1: Standard Open Bearing Roller Bit w/ Fluid Circulation

    2: Standard Open bearing Roller Bit for AIR drilling only

    3: Standard Open Bearing Roller Bit with gauge protection inserts which is defined as TCI inserts in the heel of the cone or in the Shirttail (HDGP)

    4: Ball & Roller Sealed Bearing w/ Fluid Circulation

    5: Ball & Roller Sealed Bearing with gauge protection inserts which is defined as TCI inserts in the heel of the cone or in the Shirttail (HDGP)

    6: Journal Sealed Bearing

    7: Journal Sealed Bearing with gauge protection inserts which is defined as TCI inserts in the heel of the cone or in the Shirttail (HDGP)

  • eXAMPLES

    IADC 2-1-1 = (2) Steel Tooth Bit (1) Medium Formation (1) Standard Open Bearing with Fluid Circulation

    IADC 2-1-2 = (2) Steel Tooth Bit (1) Medium Formation (2) Standard Open Bearing with Air Circulation

    IADC 5-1-1 = (5) TCI Insert Bit (1) Soft Formation (1) Standard Open Bearing with Fluid Circulation

    IADC 5-1-2 = (5) TCI Insert Bit (1) Soft Formation (2) Standard Open Bearing with Air Circulation

    IADC 6-3-4 = (6) TCI Insert Bit (3) Medium‐Hard Formation (4) Ball & Roller Sealed Bearing

    IADC 6-3-5 = (6) TCI Insert Bit (3) Medium‐Hard Formation (5) Ball & Roller Sealed Bearing with TCI Insert Protection on Shirttail

    IADC 2-1-6 = (2) Steel Tooth Bit (1) Medium Formation (6) Sealed Journal Bearing

    IADC 5-1-7 = (5) TCI Insert Bit (1) Soft Formation (7) Sealed Journal Bearing bit with TCI Inserts on Heel of Cone

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