Product Specification | |
Type specification(inch): | 8 1/2 |
Type specification(mm): | 215.9mm |
IADC: | 617 |
Additional features: | G |
Formation: | High pressure resistance,medium hard formation with hard and thick interlayer. |
Drilling condition: | rotary drilling、high temp.drilling、deep drilling、motor drilling |
Bearing Type: | journal bearing |
Total teeth count: | 138 |
Gage row teeth count: | 45 |
Number of gage rows: | 3 |
Number of inner rows: | 10 |
Journal angle: | 36° |
Offset: | 3 |
API connection(REG pin): | 4 1/2 |
Weight on bit(KN): | 108-237 |
Rotary speed(Rpm): | 220-40 |
Recommened upper torqueKN.M: | 16.3-21.7 |