| Packaging Details: | wooden box; steel box; or as your requirements |
|---|---|
| Delivery Detail: | within 7 days after conform orde |

Advantages:
1 Covered almost IADC code.
2 Excellent quallity and reasonable price
3 API&ISO approved
Specification:
| Dia. | 12 1/4 (311.2mm) |
| IADC | 215 |
| Bearing Type | elastomer sealed antifriction bearing |
| WOB (kN/ mm) | 0.25~0.70 |
| RPM (r/ min) | 200~80 |
| Applicable Formations | Median hard with thick stratum formations , such as argillite, limestone, sandstone, etc. |
Packing:


Payment:
T/ T and L/ C are acceptable
Available products:

| bit size (inc) | bit size (mm) | bit type |
| 8 3/8 | 212.7 | HJ437G; HJ517GL; HJT517GL; HJ537GL; HJT537GH |
| 8 1/2 | 215.9 | HJT117; HJT137; HJ417; HJ437; HJT447G; HJ517G; HJ517GL; HJS517G; HJ537G; HJT537GH; HJS537GL; HJ547G |
| 8 3/4 | 222.3 | HJT117, HJT537G |
| 9 1/2 | 241.3 | HJ437; HJ517G; HJT517GL; HJ537G; HJT537GL; HJ617G; HJT617GH; HJ637G; HJT637GH |
| 9 5/8 | 244.5 | HJ537G |
| 9 7/8 | 250.8 | HJT117; HJ417; HJ43 |
| 10 5/8 | 269.9 | HJT127; HJT137; HJT517G |
| 12 1/4 | 311.2 | HJT117; HJT117G; HJ127; HJT127G; HJ137; HJ417; HJ437; HJ517G; HJS517G; HJ537G; HJS537G; HJ617G; HJ637G |
| 17 1/2 | 444.5 | HJ517G; HJ527G; HJ537G |
We have a Export Department, which specialize in the export of various products made by ourselves including
Drill bits, Drill Pipe, TCI tricone bits, PDC bits, PDC Diamond drill bits, roller rock bits, core bits, all size bits in oilfield, water well drilling, mineral and geological and so on. During the twenty years, we have built good business relationships with customers abroad, such as America, Japan, Korea, Germany and so on. Thus the stable supplies, the quality as well as the flexible ways doing business can be reached.