IMT Full Interlocking Drilling Rig Kelly Bar
Full-interlocking Kelly bar is composed of three weld-on ribs with continuous concave and convex keys . During the drilling process, the downward thrust is transmitted to drill bucket directly by rotation power of Rotary head inner ribs and Kelly bar outer ribs at any time . This type of Kelly bar is the best one of transferring pressure at present , especially for hard ground and frozen oil layer construction.
| OEM/ODM | Both |
| Material | Q345B /Q460D / 35CrMo With Special Heat Treatment /27SiMn |
| Manufacture Process | Robot Welding ,Gas Shielded welding , Manual DC Welding |
| Tailored | Round /Square |
construction site
