It is suitable for sidetracking, deep well drilling and old well repairing.
1 Two watercourse can improve washing endurance and prevent mud.
2 Silver-plated at sliding surfaces of cone bearing to strength self-lubricating effect, and improve the bearing of wear-resisting life.
3 The bit inlaid with diamond compact teeth can be more effectively improve working life.
4 Two advanced high-saturated buna-N rubber seal rings are used for journal and bearing pin sealing, which ensured the high reliability of the bearing seal structure.
5 The bearing is improved by applying hard facing layer on head bearing surface, extended working life.
| IADC |
WOB(KN/mm) |
RPM(r/min) |
Applicable Formations |
| 527 |
0.3-0.7 |
120-50 |
Soft formation with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft shale,soft limestone,etc |
| 547 |
0.3-0.7 |
100-50 |
Soft to medium formation with low compressive strength,such as medium soft shale,medium soft limestone,medium soft sandstone,medium for formation with harder and abrasiver interbeds,etc. |
| 617 |
0.4-0.8 |
90-50 |
Medium hard formations with high compressive strength,such as hard shale,limestone,sandstone,dolomite,etc. |
| size(in) |
site (mm) |
| 3 3/4 |
95.3 |
| 4 |
101.6 |
| 4 1/8 |
104.8 |
| 4 1/2 |
114.3 |
| 4 5/8 |
117.5 |
| 4 3/4 |
120.7 |
| 5 7/8 |
149.2 |
| 6 |
152.4 |
| 6 1/8 |
155.6 |
Audited Supplier 
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