Rotary drilling Kelly bar worn parts Kelly box swivel joint terminal joint

Product Description

KR Drill - Characteristic
 
Materials**-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 -SY**0/ZT**0 under quenched-tempered heat treatment
B-Reasonable radian of Kelly ribs and Pressure Key board of *0CrMoTi
C-Bottom inner hole design of Kelly box for better performance of heat-treatment with *5CrMo.
Contructure**-What we understand?
A-Professional technical engineer to make the optimal gaps of 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.
Welding**-What we pay attention to ?
Except the professional machine welding, the experienced welder will be for the key parts with professional manual welding to be longer working life.