Kelly Bar Rotary Drilling Rig Piling Tools Construction Foundation
Drilling
Kelly bar is the key part of a drilling machine, transfer the torque of the rotary drive and the pressure of the
rotary rig system to the drilling tools and its quality directly
affects the performance of the whole machine.
Based on the rich manufacturing experience and by absorbing the
advanced technology both at home and abroad.
we supply two kelly bar, interlocking and friction.
Frictional kelly bar needn't unlock the joint of its inner and
outer lining so that it is convenient and fast to lift the bar.
Non-stair key, friction transmission the outside key is made by
highly wear-resisting tempering steel. For layer of soft ground and
mud, mud, (mud) sand, gravel
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.
1. Strict selection of raw materials and forging parts such as
drive stub to assure the reliable quality
2. Heat treatment is widely used in the key parts such as drive key
to improve wear resistance
3. Heat treatment is widely used in the key parts such as drive key
to improve wear resistance
4. Steel pipes through shot blasting have high surface quality and
fatigue strength
