Description
8 1-2 LS437G.pdf
Applicable Conditions
- Formations: Soft to Medium Hard Formation of Low Crushing Resistance
- Drilling Condition:
- Rotary Drilling
- High Temp. Drilling
- Deep Drilling
- Motor Drilling
Bit Specifications
| Parameter | Specification |
|---|---|
| Bit Size | 8 1/2″ (215.9 mm) |
| Model / Type | LS437G |
| IADC Code | 437 |
| Bearing Type | Journal Bearing |
| Total Insert Count | 80 |
| Gage Row Insert Count | 33 |
| Number of Gage Rows | 3 |
| Number of Inner Rows | 7 |
| Journal Angle | 33° |
| Offset | 8 mm |
| API Connection | 4 1/2″ Reg. Pin |
| Features | G: Extra Gauge Protection |
General Operating Parameters
| Parameter | Recommended Range |
|---|---|
| Weight on Bit (WOB) | 76 – 222 KN |
| Rotary Speed (RPM) | 300 – 60 RPM |
| Recommended Upper Torque | 16.3 – 21.7 KN·m |
