 
	  | 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 |