O-ring sealed journal bearing | Journal bearing structure with head bearing hardfaced and cone bearing silver plated to improve load capacity and anti-galling ability of the bearing. More wear and high-temperature resistant highly s |
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Cutting structure | Hardfaced gage and tooth surfaces. |
Hardfacing on shirttail | This feature can provide better protection for seal and bearing to extend the bit’s service life. |
Technical specifications: | |
IADC Code: | 115 |
Weight: | 282 KG |
Package: | 52×58×80 cm |
Recommended operating parameters: | |
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Bit Pressure: 0.5 ~ 0.75 KN | |
Rotary Speed: 70 ~ 160 r/min | |
Pumping Pressure: 9 ~ 20 Mpa | |
Sediment Concentration: < 0.5% |
The above parameters are only for reference. Optimized parameters are determined by drilling process and lithology of formations on site.
tricone bit nozzle and assembled size | ||||
Bit diameter | Nozzle outer diameter | assembled length | Nozzle exit diameter (inner diameter) | |
in | mm | mm | mm | mm |
3 1/2~5 1/2 | 88.9~139.7 | 20.3 | 17.5 | 4~10 |
5 5/8~7 3/8 | 142.9~187.3 | 23.6 | 19.0 | 5~16 |
7 1/2~8 1/4 | 190.5~209.6 | 29.8 | 21.0 | 7~18 |
8 3/8~14 5/8 | 212.7~371.5 | 33.0 | 27.0 | 8~20 |
≥14 3/4 | ≥374.6 | 40.9 | 27.0 | 10~22 |
Note: the assembled lenght is length from nozzle inlet to retaining ring groove |
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