TCI Roller Tricone Bits

IADC745（250mm/ 9 7/8”）

Sealed bearing rock tri-cone bit.

Could be widely used for drilling work in open pit iron mines, molybdenum mines, copper mines etc. Thread connection conforms to API standards. 

IADC code: 745 

4、IADC745-250

一、Structuring character

1. Rock breaking structure & ways: adopting tungsten carbide compacts. Rock breaking ways are rolling, gouging. In combination with optimized teeth placement, this model of bit is of good rock breaking efficiency. 

2. Bearing system: sealed bearing, grease lubrication. 

3. Thread connection: 6 5/8 REG

二、Applicable formation: abrasive hard formation (rock hardness f12-16), such as fine granite, quartzite, skarn, quartzite sandstone, basalt, magnetite, hematite etc. Good drilling hole index was obtained during drilling work in the Jianshan iron mines of TaiGang, iron mines of Erkou, molybdenum mines of PanGang and Henan Ruanchuang.  

Thread connection: 6 5/8 REG

三、Recommended operating parameters

WOB: 5880-11770 N/cm bit dia.

RPM: 50-80 r/m