Rotary kelly bar

1.high quality and competitive price 2.applied to the hard layer and high efficiency 3.durable steel material for longtime us

     Lock drilling machine, three key type and six key type two kinds, steel material adopt high quality alloy steel seamless steel tube, welding in the key on the road for high wear-resisting drive keys. The key driver, according to the outside pressure stroke with three or four pressure point, when the pipe to drive into the driver turns key point, the key pressure produced by the pressurized cylinder pressure, with head and drill through direct transmission to drill, can apply in neutral layer, hard soil or rock layer.

Rotary kelly bar
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

Rotary kelly bar