Wholesale API TCI rotary roller cones tricone drill bits with discounted price in the stock from China factory for hard formations. TCI(tungsten carbide insert). these tricones are designed for soft to very hard formations depending on the style and quantity of the carbides on the drill bit...because of its versatility and performance, it's still one of the main rock bits in use today. it is widely used for oil&gas, water well, geotechnical, environmental, geothermal,construction, exploration and mining drilling. Welcome visit our factory , any need pls feel free to contact me.  We can show our company's video for your reference! 1.soft formations(417, 437, 517, 537) features large chisel-shaped inserts to provide the highest penetration rate in the softest formations such as shales, clays, limestone and sands. 2.soft to medium formations(617, 637) designed to drill effectively in formations such as hard limestone, dolomite, hard sands, and other formations with hard cherty. 3.medium to hard formations(737) for extremely hard formations such as chert, granite, flint, and taconite. features short, closely spaced inserts to ensure maximum penetration rate and wear resistance.

Basical Specification
Size of Rock Bit	17 1/2  inches
	444.5mm
Bit Type	TCI Tricone Bit
Thread Connection	7 5/8 API REG PIN
IADC Code	IADC 637G
Bearing Type	Journal Sealed Bearing with Gauge Protection
Bearing Seal	Elastomer or Rubber/ Metal
Heel Protection	Available
Shirttail Protection	Available
Circulation Type	Mud Circulation
Drilling Condition	Rotary drilling,high temp drilling,deep drilling,motor drilling
Nozzles	3
Operating Parameters
WOB (Weight On Bit)	499,40-119,482 lbs
	222-533KN
RPM(r/min)	40~180
Formation	Medium formation with low compressive strength,such as medium,soft shale,medium soft limestone,medium soft limestone,medium soft sandstone, medium formation with harder and abrasive interbeds,etc.