Product Details

best quality combined kelly bar, Interlocking kelly bar for Rotary rig, Mait HR180 drilling kelly bar

Product Description

There are mainly two types of kelly bars:

1.Interlocking Kelly Bar

2.Frction 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:

Name of product	EXternal dimeter (mm)	Pith No	Length section (m)	Rated tarquel (KN*M)	Depth (m)
Interlocking kelly bar	355	3	10-13	180	27-36
	377	3,4	10-12.5	220	27-44
	406	3,4	10-15	230	27-57
	419	3,4	10-15	250	27-57
	440	3,4	10-15	250	27-57
	470	3,4	10-17	280	27-65
	508	3,4	10-17	320	27-65
	530	3,4	10-20	380	27-76
	575	3,4	10-21	420	27-80
	630	3,4	10-21	450	27-80

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.

Name of product	EXternal dimeter (mm)	Pitch No	Length section (m)	Rated tarquel (KN*M)	Depth (m)
Friction kelly bar	355	4,5	10-13	180	36-60
	377	4,5	10-14	200	36-65
	406	4,5	10-15	210	36-70
	419	4,5	10-15	250	36-70
	440	4,5	10-15	250	36-70
	470	4,5,6	10-17	280	36-95
	508	4,5,6	10-18.5	320	36-103
	530	4,5,6	10-19	380	36-106
	575	4,5,6	10-21	420	36-120
	630	4,5,6	10-21	450	36-120