IADC Code | 117 |
---|---|
Type | Steel tooth |
Number of cones | 3 |
Number of nozzles | 3 |
Bearing type | Rubber |
Seal type | Slide |
Center water hole | NO |
Tooth shape | NO |
Thread Connection | 6 5/8" API REG Pin |
Type of reinforcement | Alloy teeth |
Weight | 83Kg |
package | Wooden box |
Rotary Speed: | 70 ~ 200 r/min |
---|---|
Pumping Pressure: | 9 ~ 20 Mpa |
Bit Pressure: | 0.45 ~ 0.75 KN |
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 |
●Applicable formations:
●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 saturated sealed journal bearing is used to improve reliability. Larger Sealed journal bearing reduces pressure on the seal, and the boss at outer end of the seal is also helpful for reliability of the seal. Surface of the thrust bearing couple are specially treated for decreasing friction and increasing rigidness, load capacity of the bit and anti-galling ability of the bearing are consequently improved.
●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.
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