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12 1/4″ MR532 Tricone Bit
IADC 532 · Φ311mm · 98kg · 6 5/8″ API
Cutting structure & formations
Gage rows: Conical. Inner rows: Conical. For hard formations with high compressive strength.
ORIGINAL · EN Conical on gage, ogive on inner rows. Designed for medium-soft formations with low compressive strengths such as shale, soft limestone, dolomite with interlayers and coal ore.
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 24,500–61,250 lbs, rotary speed 80–110 rpm
Technical parameters
| Model | MR532 |
|---|---|
| IADC code | 532 |
| 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 | Ogive |
| Gage row teeth | Conical |
| Gage bevel protection | Round |
Operating suggestions
Actual parameters must be set per application
| Weight on bit | 24,500–61,250 lbs |
|---|---|
| Rotary speed | 80–110 rpm |
| Air back pressure | 0.2–0.4 MPa |
| Formation strength | 15,000–23,000 Psi |
