4 sections key parts of high quality rotary drilling sare parts High Manganese Steel kelly bar

There are mainly two types of kelly bars:

1.Interlocking Kelly Bar 

2.Friction Kelly Bar

1) interlocking Kelly Bar

Interlocking kelly bars are used with pilling rigs for drilling in dense sand,gravel and weak to strong rock . The interlocking kelly bars can be 

fully locked by mechanical locking system on each sectiong. Kelly bars can be equipped with specially designed springs or pressure plates for shock absorbing purpose.

Please check details as below:

 2) Friction Kelly bar 

Friction Kelly bar is another type kelly of bar ,which the external key is composed of 3 or 6 wear -resistant strip without pressunrizing point .This kelly bar can form pressure force when the kelly bar is rotary.can produce peripheral force and the rotary passing down the pressure force,can produce the friction force.This kelly bar has the advantage of opeerating sample .drilling deep ,but with less pressure transmission.So this kelly bar is suitable for the soft and silt layer.

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 What are FAE kelly bar production?

What are FAE Kelly bar delivery?

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