kelly bar matched Solimec rotary drilling rig

1,high quality and competitive price 2,durable steel material for longtime use 3,applied to the hard and soft layer

      The external key of the mechanical interlocking kelly bar usually hao three or six keys. There are three large groups or N groups pressure concave parts in the external key, three or six wear-resistant keys in the internal keys. The length of the bar is less than the length of large concave tine of the external key. When the driving force rotates, the internal key of the driving set or the internal key of kelly bar rotate to the large concave tine of the external key, and formed a Kai-type pressuring point. Driving force head send pressure to the drill head, then forms a mechanical locking. A full rotary drill head must be rotary in the opposite direction to unlock, then smoothing reversal upgrade.

      This kelly bar is used for hard or soft layer to drill, which hao better transmission pressure. This kelly bar need to move driving force head up and down. When drilling in hard layer,. It transfer pressure after find the large concave meshing tine in the external. At resent,the mechanical pressuring kelly bar is usually combined with three sections, four sections and five sections, with the drilling depth in the range of 36-80 meters.

kelly bar matched Solimec rotary drilling 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

kelly bar matched Solimec rotary drilling rig