Different types and sizes of TCI rock and triangular bits

Different Types and Sizes of TCI Rock Bits & Tricone BitsThe roller-cone bits are used to drill all kinds of formations, from soft to hard. The softer formations use steel-tooth bits, and the harder&

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Different Types and Sizes of TCI Rock Bits & Tricone Bits

The roller-cone bits are used to drill all kinds of formations, from soft to hard. The softer formations use steel-tooth bits, and the harder use tungsten carbide.<o:p>
The biggest advantage the tricone bits have over any other drill bit is the test of time. They have been proven time and time again, and they're the best at controlling the trickier situations. Tricones' ability to handle both soft and hard formations gives them the flexibility that other drill bits do not have.
 
IADC  WOBRPMApplication
(KN/mm)(r/min)
111/114/1150.3-0.75200-80very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk
116/1170.35-0.8150-80very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk
1210.3-0.85200-80soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone
124/125180-60
1310.3-0.95180-80soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds
136/1370.35-1.0120-60
211/2410.3-0.95180-80medium formations with high compressive strength, like medium, soft shake, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbeds.
216/2170.4-1.0100-60
246/2470.4-1.080-50medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite
3210.4-1.0150-70medium abrasive formations, like abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble
3240.4-1.0120-50
437/447/4350.35-0.9240-70very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk, gypsum, salt, soft limestone
517/527/5150.35-1.0220-60soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone
537/547/5350.45-1.0220-50soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds
617/6150.45-1.1200-50medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite
637/6350.5-1.1180-40hard formation with high compressive strength, like limestone, sandstone, dolomite, hard gypsum, marble
Note: Above limitts of WOB and RRPM should not be used simultaneously

PIN SIZE
 
Bit DiameterAPI PIN
(inch)(mm)
3 7/8"~5 1/4"98~1342 3/8", 2 7/8"
5 5/8"~6 3/4"143~1713 1/2"
7 1/2"~9 1/2"190.5~2414 1/2"
9 5/8"~13 3/4"245~3506 5/8"
14 5/8"~26"371~660.47 5/8"

 

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