Product Details

Drilling Rig use Interlocking Kelly bar / Friction Kelly bar

Kelly bar is a very important part for rotary drilling rig, because its quality directly affects the work efficiency by transferring up pressure to the down drilling tool. Kelly bar can be divided into 2 models: interlcoking kelly bar & friction kelly bar. also the mix-type kelly bar which a combination of interlcking kelly bar and full interlocking kelly bar.

Product Description

Interlocking kelly bar

Interlocking Kelly bar contains two type pressure modes: one type is 3 or 6 external keys with 3 or more concave pressure parts, the other is 3 external pressure strips with full pressure parts on it, which mostly matched IMT drilling rig. and the advantage of transfer pressure easily and better anti-torque capacity. It’s suitable for both like dense sand and gravel or weak to strong rock.

Interlocking kelly bar
Type	O.D(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	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

Note: Paragram is only as reference, adjusted can be according to actural demand.

Friction kelly bar

Friction Kelly bar is composed 3 or 6 wear-resistant seamless alloy strips by working through friction produced by rotary passing down the pressure force without concave pressure point. This type is suitable for both soft layer and silt layer.

Friction kelly bar
Type	O.D(MM)	Section	Depth(m)	Torque(KN.M)
JT12 340-4x13	340	4	49	120
JT12 356-3x13	356	3	49	120
JT15 377-4x14	377	4	52	150
JT20 394-4x13	406	5	36	200
JT22 406-5x14	406	4	64	220
JT25 419-5x15	419	5	70	250
JT25 440-5x15	440	5	70	250
JT25 470-6x16	470	6	83	250
JT28 508-6x16	508	6	89	280
JT30 530-6x18.7	530	6	110	300
JT40 580-6x18.7	580	6	110	400

Note: Paragram is only as reference, adjusted can be according to actural demand.