■ MAIN STRUCTURE FEATURES
1 .Journal bearing.Hardfaced head bearing surface. Inner hole of cone is silver-plated.The load capacity and seizure resistance
of the bearing is greatly improved.
2.0 ring seal is made of the more wear resistant and high saturated buna-N with the increased seal section and precisely
designed scaling flange in the cone sealing area has increased the reliability of the seal.
3. AII rubber compensator is used which can limit pressure differential and prevent drilling fluid from entering the lubrication
system and this provides the bearing system with good assurance of lubrication.
4. High wear resistance and excellent cutting ability of the insert bit are given full play by using carbide compacts of high
strength and high toughness in combination with optimized compact numbers androws.the exposure height and special
shaped compacts.For steel tooth bit,the tooth surface is hard faced with new type of wear resistant material and thus has
extended working life of the cutting structure while still maintaining high ROP
Size(in) | Size(mm) | IADC | WOB(kN/mm) | RPM(r/min) | Applicable formations |
6 | 152.4 | 537 | 0.45-1.0 | 120-50 | Soft to medium formations with low compressive strength,such as medium soft sandstone,medium formation with harder and abrasiver interbeds ect.
|
