Construction machinery tools parts telescopic interlocking kelly bar 

Advantages of our drill pipe:

1. Adopt the advanced technology design and standard modular design.

2. Equipped with advanced processing facilities, processing technology and auto manufacturing equipment .

3. The kelly bar is with low weight , high strength , good abrasion resistance.

4. The material is from China top pipe manufacturer or imported from Germany . the seamless steel tube is with alloy and special heat treatment .

5. Have granted more than 35 patents for the kelly bar design area.      

Interlocking kelly bar is of great pressure transmission and good anti-contortion perfomance. There are 3 rigid parts between drilling pipes to transfer greater pressure from embedding cylinder. And even at the hard geologic condition it can transfer greater pressure and drill in. Stair key, organization transmission, the outside key is made by highly wear-resisting tempering steel. For soft fromations, (weak) weathered rock, hard strata construction.

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