Rotary drilling rig IMT AF240/180/270/300 OD406mm OD482mm Full interlocking Kelly bar

Interlocking Kelly Bar & Friction Kelly Bar

Kelly bar is the key part of a drilling machine, 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 can produce first-class kelly bar which can be compared favorably with the imported ones.

Interlocking Kelly bars are used with piling rigs for drilling in dense sand and gravel and weak to strong rock. The Interlocking Kelly bars manufactured by JTHL can be fully locked by mechanical locking system on each section. Kelly bars can be equipped with specially designed springs or pressure plates for shock absorbing purpose.

Friction Kelly bars are used with piling rigs for drilling in silt, clay and less dense sand and gravel. The Friction Kelly bars manufactured by JTHL are un-lockable with drive keys on each section. Kelly bars can be equipped with specially designed springs or pressure plates for shock absorbing purpose. Please see below chart of some of our standard productions for Friction kelly bars.

1,  35 patents in Kelly bar design & producing technology field.

2, 14 years professional experienced manufacturer in producing rotary drilling rig kelly bar.

3, High quality alloy seamless steel pile in 35CrMo/27SiMn under thermal refining heat treatment.

4, Ready stock kelly bar in standard dimension for all brand rotary drilling rig, in case of hurry order.

5, One year warranty time to prove kelly bar high quality !

6, Factory directly price !