Home  >  Mining & Metallurgy Machinery  >  Mining Machinery Parts

1,High quality and competitive price, 2,Durable steel material for longtime use, 3,Applied to the hard and soft layer - details see: https://www.machineto.com/frictiona-kelly-bar-for-imt-drilling-rig-10317378

Rotary drilling rig Frictiona Kelly Bar

The external keys of frictional pressuring kelly bar has three ro six straight keys,there is no large concave press uring table in the middle ,and there are three or six wear-straight bar in the internal key.When the driving force rotates,the internal key of the driving sets push the straight bar of the external key of Kelly bar ,to drive the Kelly bar rotary,the peripheral force is produced when the Kelly bar rotaries,which pass pressure to produce the friction.

The function of passing pressure is usual,the Kelly bar is generally used for soft layer or drift sand formation .grinding resistance pressuring Kelly bar is usually formed by 5-6 sections ,with the drilling depth in the range of 50-90 meters.

Rig Kelly Bar
Type	O.Dia.(MM)	Section	Depth(m)	Torque(KN.M)
3x13	340	3	36	120
3x13	356	3	36	120
4x14	377	4	52	150
4x14	406	4	52	200
4x14	406	4	52	220
4x15	445	4	56	250
3x15 (Reinforced)	445	3	42	250
4x15	470	4	56	250
4x15	508	4	56	250
5x15	508	5	70	280