Rotary Drilling Interlock Kelly Bar Friction Kelly Bar
Advantages of drill pipe:
1. Adopt the advanced technology design and standard modular design.
2. Equipped with advanced processing facilities, processing technology and auto manufacturing equipment .
3. The kelly bar is with low weight , high strength , good abrasion resistance.
4. The seamless steel tube is with alloy and special heat treatment .
5. Have granted more than 35 patents for the kelly bar design area.
