Design Specifications
The fixed diameter hole opener is a general hole enlarging tool. It is used to enlarge hole during drilling. If itconnected with a bit on its front end, it coulddrill and enlarge the hole simultaneously.
The cutters can be replaced according to the different hardness of formation.
扩孔直径 Std opening hole | 牙轮数 Nb．Of cutters | 最小领眼 Pilot hole (mini） | 打捞径 直径 Dia |
上端螺纹 Top conn | 下端螺纹 Bottom connect |
水眼 Bord | 总长 Overall length | 总重 Weight with cutters (kg) |
12-1/4 | 3 | 8-1/2 | 8" | 6-5/8REG | 6-5/8REG | 1-1/2" | 59" | 360 |
17-1/2" | 3 | 10-1/2" | 9-1/2" | 7-5/8REG | 7-5/8REG | 2-1/4" | 59" | 550 |
26″ | 3 | 17-1/2" | 10" | 7-5/8REG | 7-5/8REG | 3" | 69" | 900 |
36″ | 3 | 24" | 9" | 8-5/8 REG 8-5/8 H90 | 8-5/8 REG 8-5/8 H90 | 3" | 75" | 1000 |
4 | 18" | 10" | 8-5/8 REG 8-5/8 H90 | 8-5/8 REG 8-5/8 H90 | 3" | 100" | 1540 |
In China
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