TCIbits series:
Soft formation TCI tricone bits:
The softformation TCI tricone bits are used to drill low compressive strength, very softformations. This bit maximized to use of both conical and chisel tungstencarbide inserts of large diameters and high projection. This cutting structuredesign, combined with maximum cone offset, results in high bit penetrationrates. The deep intermesh of cutter rows prevents bit bailing in stickyformations.

Mediumformation TCI tricone bits:
The medium formation TCI triconebits features aggressive chisel tungsten carbide inserts on the heel rows andinner rows. This design provides a fast drilling rate and added cuttingstructure durability in medium to medium hard for mations. The HSN rubber O-ringprovides adequate sealing for bearing durability.

Hard formation TCI tricone bits:
The hard formation TCI tricone bits can be used to drill hardand abrasive formations. Wear resistance tungsten carbide inserts are used inthe outer rows to prevent loss of bit gauge. Maximum numbers of hemisphericalshaped inserts are used in all rows to provide cutter durability and long life.

Medium hard formationTCI tricone bits:
The medium hard formation TCI tricone bitsfeatures robust chisel tungsten carbide inserts on the heel row and conical onthe inner rows. This design provides a fast drilling rate and added cuttingstructure durability in medium to medium hard formations. The HSN rubber O-ringprovides adequate sealing for bearing durability.

No	IADC Code	Recommendation
		WOB(KN/mm)	Rotary Speed(rpm)
1	117	0.35~0.8	240~80
2	127	0.35~0.9	240~70
3	437 447	0.35~0.9	240~70
4	517 527	0.35~1.0	220~60
5	537 547	0.45~1.0	220~50
6	617 627	0.45~1.1	200~50
7	637	0.5~1.1	180~40