Hydraulic Shock Sub Type YJ
Model “YJ” Hydraulic Shock Sub should be mounted on the drilling string near the bit, absorbing or reducing axial vibration and thrust load of the drilling string. And it has a good results for prolonging the service life of the bit and protecting the drilling tools and the surface equipment.
Specifications
Model | Tool OD
mm
(in) | ID
mm
(in) | Conn. | Max. Working
Load
kN(lbf) | Max. Working
Torque
kN·m(lbf/ft) | Max. Working
Pressure
kN(lbf) | Working
Stroke
mm(in) | Overall Length mm |
YJ95 | 95
(3 3/4) | 38
(1-1/2) | NC26 | 400
(90000) | 8
(5900) | 120
(26000) | 100
(3.9) | 2880 |
YJ121 | 121
(4 3/4) | 38
(1-1/2) | NC38 | 1500
(340000) | 15
(11000) | 265
(60000) | 100
(3.9) | 4116 |
YJ165 | 165
(6 1/2) | 50
(2) | NC50 | 1600
(360000) | 25
(18000) | 340
(76000) | 120
(4.7) | 3800 |
YJ203 | 203
(8) | 68
(2-11/16) | 6-5/8REG | 2000
(450000) | 35
(25800) | 490
(110000) | 140
(5.5) | 4040 |
YJ229 | 229
(9) | 71.4
(2-13/16) | 7-5/8REG | 3000
(670000) | 55
(40000) | 550
(120000) | 140
(5.5) | 4090 |
YJ254 | 254
(10) | 76.2
(3) | 8-5/8REG | 3000
(670000) | 55
(40000) | 600
(130000) | 140
(5.5) | 4100 |
YJ356 | 356
(14) | 76.2
(3) | 8-5/8REG | 8000
(1800000) | 150
(110000) | 600
(130000) | 150
(5.9) | 4000 |
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