BH-VDT Vertical Drilling System
- ◆Downhole auto-deviation correction
- ◆Anti-deviation and straightening
- ◆Near-bit measurement and high control precision
- ☆For vertical drilling of piedmont high-steep structure and overthrust nappe formation
- ☆Deviation within 0.5 °
- ☆Maximum ROP: 1,912 ft/day