Home / Products / Tricone / Extremely Hard 8xx / 12 1/4″ MR832
12 1/4″ MR832 Tricone Bit
IADC 832 · Φ311mm · 98kg · 6 5/8″ API
Cutting structure & formations
Gage rows: Ovoid. Inner rows: Ovoid. For extremely hard formations with high compressive strength, typically magnetite quartzite, quartzite, granite.
ORIGINAL · EN Ovoid on gage, ovoid on inner rows. Designed for extremely hard and abrasive formations with high compressive strengths such as magnetite quartzite, quartzite, granite.
Shirttail protection
Hardmetal on lug; Wear resistant carbide on shirttail lip and lug.
ORIGINAL · EN Hardmetal on lug; Wear resistant carbide on shirttail lip and lug.
- Diameter 12 1/4″ / Φ311 mm, weight 98 kg
- Connection 6 5/8″ API, bearing Roller-Ball-Roller-Thrust Button/Open Bearing
- WOB 61,250–98,000 lbs, rotary speed 50–80 rpm
Technical parameters
| Model | MR832 |
|---|---|
| IADC code | 832 |
| Diameter | 12 1/4″ / Φ311mm |
| Thread | 6 5/8″ API |
| Weight | 98 kg |
| Bearing type | Roller-Ball-Roller-Thrust Button/Open Bearing |
| Circulation | Jet Air |
| Inner row teeth | Ovoid |
| Gage row teeth | Ovoid |
| Gage bevel protection | Round |
Operating suggestions
Actual parameters must be set per application
| Weight on bit | 61,250–98,000 lbs |
|---|---|
| Rotary speed | 50–80 rpm |
| Air back pressure | 0.2–0.4 MPa |
| Formation strength | 55,000–66,000 Psi |
