| 出生地 |
China (Mainland) |
| 牌子的名字 |
TOP |
| 机器型号 |
钻探工具 |
| 使用 |
钻井 |
Fixed Diameter Hole Opener Fixed Diameter Hole Opener is a general hole enlarging tool and is designed for enlarging holes onshore and offshore in oilfield during drilling.It is used to enlarge a hole or connected with a bit on front end to drill pilot hole and enlarge hole simultanously.