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9″ MR635 Tricone Bit
IADC 635 · Φ229mm · 50kg · 4 1/2″ API
Cutting structure & formations
Gage rows: Ovoid. Inner rows: Conical. For medium-hard formations with high compressive strength, typically limestone, sandstone, dolomite, chert.
ORIGINAL · EN Ovoid on gage, conical on inner rows. Designed for medium-hard and abrasive formations with high compressive strengths such as limestone, sandstone, dolomite and chert.
Shirttail protection
Hardmetal and wear resistant carbide on shirttail lip and lug.
ORIGINAL · EN Hardmetal and wear resistant carbide on shirttail lip and lug.
- Diameter 9″ / Φ229 mm, weight 50 kg
- Connection 4 1/2″ API, bearing Roller-Ball-Roller-Thrust Button/Sealed Bearing
- WOB 27,000–54,000 lbs, rotary speed 60–100 rpm
Technical parameters
| Model | MR635 |
|---|---|
| IADC code | 635 |
| Diameter | 9″ / Φ229mm |
| Thread | 4 1/2″ API |
| Weight | 50 kg |
| Bearing type | Roller-Ball-Roller-Thrust Button/Sealed Bearing |
| Circulation | Jet Air |
| Inner row teeth | Conical |
| Gage row teeth | Ovoid |
| Gage bevel protection | Round |
Operating suggestions
Actual parameters must be set per application
| Weight on bit | 27,000–54,000 lbs |
|---|---|
| Rotary speed | 60–100 rpm |
| Air back pressure | 0.2–0.4 MPa |
| Formation strength | 29,000–38,000 Psi |
