COMBINED FULL-INTERLOCKING KELLY BAR

Composite full-interlocking kelly bar is one type of kelly bar combining of machine-locking form and full-interlcking form,and has variety of different collocations.Composite full-interlocking kelly ba is based on domestic kelly bar configuration and working condition demand,combined with forrign  kelly bar manufacturing design technology,supporting all the domestic and foreign piling rig brands.This kelly bar is used for high-strength alloy steel pipe and wear-resisitant alloy strip, and we take the specialized technology treatment for the wearing part, such as pressure point, square  head and retainting ring and so on, to ensure the kelly bar’s reliability and long life.