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. In the drilling process , every continuous steps can form pressure point to reduce wear and tear of local pressurization key lines, also to avoid the stick problem that Kelly pipe is deformation always in a part pressurization.
Our full locking kelly bar is one hot selling type for customers to choose.
This type of Kelly bar is the best one of transferring pressure at present , especially for hard ground and frozen oil layer construction. In the drilling process , every continuous steps can form pressure point to reduce wear and tear of local pressurization key lines, also to avoid the stick problem that Kelly pipe is deformation always in a part pressurization.
Our full locking kelly bar is one hot selling type for customers to choose.
Specifications
2 to 6-part telescopic for depths of 15 – 140 m
Torque transfer from 120 – 500 kNm
6 drive keys with large lock recesses
Shock absorbing system by spring assembly
Standardized square kelly drive stub for all drilling tools
*Other size can be tailor-made as requirement
Warranty
One year or 2000 working hours
Spare Parts
Kelly bar spring, Swivel
Packaging & Shipping
Package Options: Standard
Packaging & Shipping: Pallet with plastic film
Packaging & Shipping: Pallet with plastic film
