How to choose Interlocking kelly bar factory

1, The width of the pressure key strips on the first row of Kelly bar is 12mm.

2, The material of the flow plate is heat-treated NM500, 35Crmo and S355 for kelly pipe. Forging type of kelly stub.

3, Using two widened guide rings improves drilling verticality.

4, High-strength, wear-resistant ring is added to the terminal joint of each sections of kelly bar to extend its service life.

5, To prevent flange breakage, our kelly bars use a flange-penetrating keying system.