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Soft Formation 4xx Tricone Bit
TRICONE DRILL BIT · SOFT FORMATION · IADC 4xx · 12 models · Φ159–270mm
Soft Formation 4xx Full specification
12 models, sorted by diameter (small to large)
| Image | Model | Diameter | IADC | Weight on bit | Rotary speed | Air pressure | Top Sub | Weight kg | Details |
|---|---|---|---|---|---|---|---|---|---|
 | 6 1/4″ MR412 | Φ159 | 412 | 6,250–12,500 lbs | 90–120 rpm | 0.2–0.4 MPa | 3 1/2″ API | 20 | View Details → |
 | 6 3/4″ MR412 | Φ171 | 412 | 6,750–13,500 lbs | 90–120 rpm | 0.2–0.4 MPa | 3 1/2″ API | 21 | View Details → |
 | 7 7/8″ MR412 | Φ200 | 412 | 7,880–15,750 lbs | 90–120 rpm | 0.2–0.4 MPa | 4 1/2″ API | 34 | View Details → |
 | 7 7/8″ MR415 | Φ200 | 415 | 7,880–15,750 lbs | 90–120 rpm | 0.2–0.4 MPa | 4 1/2″ API | 34 | View Details → |
 | 9″ MR412 | Φ229 | 412 | 9,000–18,000 lbs | 90–120 rpm | 0.2–0.4 MPa | 4 1/2″ API | 50 | View Details → |
 | 9″ MR415 | Φ229 | 415 | 9,000–18,000 lbs | 90–120 rpm | 0.2–0.4 MPa | 4 1/2″ API | 50 | View Details → |
 | 9″ MR435 | Φ229 | 435 | 9,000–36,000 lbs | 90–120 rpm | 0.2–0.4 MPa | 4 1/2″ API | 50 | View Details → |
 | 9 7/8″ MR415 | Φ251 | 415 | 9,880–19,750 lbs | 90–120 rpm | 0.2–0.4 MPa | 6 5/8″ API | 65 | View Details → |
 | 9 7/8″ MR435 | Φ251 | 435 | 9,880–39,500 lbs | 90–120 rpm | 0.2–0.4 MPa | 6 5/8″ API | 65 | View Details → |
 | 10 5/8″ MR415 | Φ270 | 415 | 10,630–21,250 lbs | 60–100 rpm | 0.2–0.4 MPa | 6 5/8″ API | 74 | View Details → |
 | 10 5/8″ MR422 | Φ270 | 422 | 10,630–21,250 lbs | 90–120 rpm | 0.2–0.4 MPa | 6 5/8″ API | 74 | View Details → |
 | 10 5/8″ MR425 | Φ270 | 425 | 10,630–21,250 lbs | 90–120 rpm | 0.2–0.4 MPa | 6 5/8″ API | 74 | View Details → |
Where this series is used
For very soft, highly drillable formations such as shale, soft limestone, sandstone, conglomerate, soft dolomite and coal.
Tricone bits are classified by IADC code: the first digit (4–8) indicates formation hardness from soft to extremely hard, the last two describe cutting structure and bearing design. Several IADC options are available in each size; selection depends on rock type, abrasiveness and rig parameters.