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 | O.D. mm(in) | I.D. mm(in) | Connection | Max. Working LoadkN(lbf) | Yield PullkN(lbf) | Max. Working Torque
kN·m(lbf·ft) |
Yield TorquekN·m(lbf·ft) | Max. Working PressurekN(lbf) | Working Stroke mm(in) | Length mm(in)
|
| YJ95 | 96(3-3/4) | 38.1(1-1/2) | NC26 | 400(90000) | 530(120000) | 8(5900) | 10(7400) | 120(26000) | 100(3-15/16) | 2880(113-3/8) |
| YJ121 | 121(4-3/4) | 38.1(1-1/2) | NC38 | 1500(340000) | 2200(490000) | 15(11000) | 50(36000) | 265(60000) | 100(3-15/16) | 4116(162) |
| YJ165 | 165(6-1/2) | 50.8(2) | NC50 | 1600(360000) | 2500(560000) | 25(18000) | 70(51000) | 340(76000) | 120(4-3/4) | 3800(149-5/8) |
| YJ178Ⅲ | 178(7) | 57.2(2-1/4) | NC50 | 2000(450000) | 2700(600000) | 35(25800) | 95(70000) | 390(87000) | 125(4-15/16) | 4070(160-1/4) |
| YJ203Ⅲ | 203(8) | 68(2-11/16) | 6 5/8REG | 2000(450000) | 2700(600000) | 35(25800) | 95(70000) | 490(110000) | 140(5-1/2) | 4040(159) |
| YJ229Ⅲ | 229(9) | 71.4(2-13/16) | 7 5/8REG | 3000(670000) | 5000(1120000) | 55(40000) | 200(147000) | 550(120000) | 140(5-1/2) | 4090(161) |
| YJ254 | 254(10) | 71.4(2-13/16) | 8 5/8REG | 3000(670000) | 5000(1120000) | 55(40000) | 200(147000) | 600(130000) | 140(5-1/2) | 4100(161-3/8) |
| YJ279 | 279(11) | 76.2(3) | 8 5/8REG | 4000(900000) | 6500(1460000) | 60(44000) | 280(206000) | 600(130000) | 140(5-1/2) | 3620(142-1/2) |
| YJ305 | 305(12) | 76.2(3) | 8 5/8REG | 6000(1340000) | 12000(2700000) | 100(74000) | 600(440000) | 600(130000) | 150(5-7/8) | 4950(194-7/8) |
| YJ356 | 356(14) | 76.2(3) | 8 5/8REG | 8000(1800000) | 19000(4270000) | 150(110000) | 1000(740000) | 600(130000) | 150(5-7/8) | 4000(157-1/2) |
| The Rigidity Scope Above-mentioned Specification: 1.2～4.3kN/cm | ||||||||||