TCI Tricone Bit also named rotary drill bit is an ideal solution for soft, medium, or hard rock formations, it is connected with the drill stem and rotates along with it, and drive cones to pressed on the rock. Each cone rotates round the axis of its leg and three cones simultaneously revolve around the bit center. The tungsten carbide inserts on the cone shell cause the formation to spall under the weight on bit and the impact load of cone rotating, the debris will be discharged out to hole by compression air.
Tricone bits come in several different varieties, and can deal with a wide range of different rock formations. It is important to know the type of formation you are drilling in when selecting a drill bit. The medium formation TCI tricone bits features
aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability.
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Basical Specification |
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Size of Rock Bit |
5 7/8" |
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149mm |
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Bit Type |
Steel Tooth Tricone Bit/ Milled tooth Tricone Bit |
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Thread Connection |
3 1/2 API REG PIN |
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IADC Code |
IADC 216 |
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Bearing Type |
Journal Sealed Roller Bearing |
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Bearing Seal |
Rubber Seal |
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Heel Protection |
Unvailable |
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Shirttail Protection |
Available |
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Circulation Type |
Mud Circulation |
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Drilling Condition |
Rotary drilling,high temp drilling,deep drilling,motor drilling |
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Nozzles |
Central Jet Hole |
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Operating Parameters |
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WOB (Weight On Bit) |
10,044-28,537 lbs |
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45-127KN |
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RPM(r/min) |
60~180 |
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Formation |
Soft to medium formations with high compressive strength, such as mudstone,gypsum,salt,soft limestone ,etc. |
5 7/8" mill tooth tricone drill bit is widely used in water well drilling, oil well drilling, geothermal well drilling, it can be used for drilling cement plug in very deep well.
The mill tooth tricone drill bit has longer teeth which could get much faster drilling down speed than TCI drill bits. The tricone bit has a central hole which is suitable for RC drilling( Reverse Circulation drilling).