THROOP ROCK BIT IADC CodE SYSTEM
(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)
