API rotary tricone roller cones bits in the stock from China factory is always for your better drilling. Bit Description: IADC: 517 - TCI journal sealed bearing bit with gauge protection for soft to medium soft formations with low compressive strength . Compressive Strength: 85 - 100 MPA 12,000 - 14,500 PSI Ground Description: 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. Far Eastern Drilling can offer tricone drill bits in a variety of sizes (from 3 7/8” to 26”) and most of IADC Codes.
12 1/4 inches(311mm) 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. According to the cutting material, tricone bit have the type of TCI (Tungsten Carbide Insert) and Steel Tooth. IADC517 is TCI tricone bit. Bearing Structure: High precision journal bearing with two thrust faces,Balls lock the cone.Hardfaced head bearing surface.Cone bearing inlaid with friction-reducing alloy and then silver-plated.Abrasion resistance and seizure of the bearing are improved.and suitable for high rotary speed. Seal and Lubrication: The advanced metal seal package consists of two metal seals and two elastic energizers.Compressed energizers ensure good contact being kept on two sealing surfaces of metal rings by elastic force,and achieves the bearing seal.In the drilling,metal seals are relatively dynamic,and the energizers are static.This will improve the reliability and durability of bearing seal.The pressure compensator system and advanced grease can greatly increase the lubricating reliability.| Basical Specification | |
| Size of Rock Bit | 12 1/4 inches |
| 311.1 mm | |
| Bit Type | TCI Tricone Bit |
| Thread Connection | 6 5/8 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 |
| Total Teeth Count | 122 |
| Gage Row Teeth Count | 48 |
| Number of Gage Rows | 3 |
| Number of Inner Rows | 8 |
| Jounal Angle | 33° |
| Offset | 9.5 |
| Operating Parameters | |
| WOB (Weight On Bit) | 24,942-73,476 lbs |
| 109-327KN | |
| RPM(r/min) | 300~60 |
| Recommended upper torque | 37.93-43.3KN.M |
| Formation | Soft formation of low crushing resistance and high drillability. |
