Friction Kelly Bar Customized For Various Drilling Rig Model

Kelly bars are key components in the execution of boreholes with hydraulic rotary drilling rigs. They transfer the torque of the rotary drive and the crowd pressure of the crowd system concurrently to the drilling tool. A Kelly bar consists of 3 5 telescopic tubular sections with a system of drive keys and lock recesses, welded onto their outer surfaces.KR Drill - CharacteristicMaterials---What we agree with ?A-We fully understand that the Materials is the first key step to make the good Kelly bar, so strictly control of pipes materials -SY550/ZT600 under quenched-tempered heat treatmentB-Reasonable radian of Kelly ribs and Pressure Key board of 30CrMoTiC-Bottom inner hole design of Kelly box for better performance of heat-treatment with 35CrMo.Contructure---What we understand?A-Professional technical engineer to make theoptimal gapsof each sections in order to be more safer and longer life.B-3 or 6 sets Kelly ribs and customized Pressure key boards reasonable matches to be adaptabe for complicated geological conditions.C-Reinforcement ring was attaced on each termiinal joint top to reduce the risk of cracking during drilling.D-Patened technology like the wider of IMT Kelly ribs to be more wear-resistant.