API tricone rock metal sealed bits from China factory have 2% discount for big quantity. IADC: 517 - TCI journal sealed bearing bit with gauge protection for soft to medium soft formations with low compressive strength . 85 - 100 MPA 12,000 - 14,500 PSI Medium hard and abrasive rocks such as sandstones with streaks of quartz, hard limestone or chert, hematite ores, hard, well-compacted abrasive rock such as: sandstones with quartz binder, dolomites, quartzite shales, magma and metamorphic coarse grained rocks.
8.5 inches (215mm or 216mm) API TCI Tricone Bits for Hard Rock 8 1/2"(215mm or 216) is a regular size in deep well drilling like oil and gas well drilling, and it is also a regular size in horizontal directional pilot hole drilling.| Basical Specification | |
| Size of Rock Bit | 8 1/2inches |
| 215mm or 216mm | |
| Bit Type | TCI Tricone Bit |
| Thread Connection | 4 1/2 API REG PIN |
| IADC Code | IADC 517G |
| Bearing Type | Journal Sealed Bearing with Gauge Protection |
| Bearing Seal | Elastomer or Rubber/ Metal |
| Heel Protection | Available |
| Shirttail Protection | Available |
| Circulation Type | Mud Circulation |
| Drilling Condition | Rotary drilling, high temp drilling, deep drilling, motor drilling |
| Nozzles | 3 |
| Operating Parameters | |
| WOB (Weight On Bit) | 16,852-48,310 lbs |
| 75-215KN | |
| RPM(r/min) | 140~60 |
| Formation | Soft to medium formation with low compressive strength, such as mudstone, gypsum, salt, soft limestone, etc. |
