Hole Opener with Pilot Bit
Cutting Structure
The reamer mainly consists of four or more cones. Cutting Structure with premium tungsten carbide hardfacing or premium tungsten carbide insert of formulas and new techniques is utilized, and increases wear-resistance capability of reamer. The pilot is tricone bit.
Seal and Lubrication
High performance HNBR O-ring for bearing seal and advanced grease for lubrication.
Product Application
It is suitable for the large size well, mining and infrastructure applications.
Recommended Drilling Parameter
IADC | WOB (KN/mm) | RPM (r/min) | Applicable Formations |
517/537 | 0.4~1.0 | 120~60 | Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. |
617 | 0.45~1.1 | 90~50 | Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc |
637 | 0.5~1.2 | 80~40 | Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc. |
117/127 | 0.35~0.9 | 150~70 | Soft to medium formations with low compressive strength , such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. |
Note: The upper limits of WOB and RPM in above table should not be used simultaneously. | |||
