Friction kelly bar of rotary rig

1.appliede to the soft layer, 2.durable steel material for longtime use, 3.drilling depth is deep - details see: https://www.machineto.com/friction-kelly-bar-of-rotary-rig-10113116

Condition:New	Place of Origin:Beijing China (Mainland)	Brand Name:JIETAI	Model Number:JT
Weight:8-15tons	Dimension(LWH):80080015000mm	color:white or other	feature:5-6 section
use:piling rig

contact supplier for Friction kelly bar of rotary rig

b The external keys of frictional pressuring kelly bar has three or six straight keys, there is no large concave pressuring 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.

Friction kelly bar of rotary rig
Type	O.Dia.(MM)	Section	Depth(m)	Torque(KN.M)
JT12 340-3x13	340	3	36	120
JT12 356-3x13	356	3	36	120
JT15 377-4x14	377	4	52	150
JT20 406-4x14	406	4	52	200
JT22 406-4x14	406	4	52	220
JT25 445-4x15	445	4	56	250
JT25 445-3x15 (Reinforced)	445	3	42	250
JT25 470-4x15	470	4	56	250
JT25 508-4x15	508	4	56	250
JT28 508-5x15	508	5	70	280