Mechanical Hydraulic Shock Sub Type DHJ
1.It is a two-function shock sub that absorbs the pulsate and shock from drill tools by compressing spring and SI oil to store the energy.
2.It is used for reducing vibrations caused by hard formation drilling and keeping the drill bit firmly on the bottom, so that it helps to reduce drill string connection fatigue and prolong drill string life.
Specification Series and Performance Parameters
Type | O.D. mm(in) | I.D. mm(in) | Overall Stroke mm(in) | Max. Working Load mm(in) | Ambient Temperature °C | Connection API | Overall Length “Extended” mm(in) |
DHJ121 | 121 (4 3/4) | 38 (1 1/2) | 100(3.93) | 40(1.57) | - 40~150 | 31/2REG | 3400 (133.85) |
DHJ159 | 159 (6 1/4) | 50.8 (2) | 120(4.72) | 60(2.36) | - 40~150 | NC46 | 4210 (165.75) |
DHJ 178 | 178 (7) | 57 (2 1/4) | 120(4.72) | 60(2.36) | - 40~150 | NC50 | 4210 (165.75) |
DHJ203 | 203 (8) | 71.4 (2 4/5) | 140(5.51) | 70(2.75) | - 40~150 | 65/8REG | 4700 (185) |
IF THE TYPE, SIZE AND SPECIAL REQUIREMENTS OF PRODUCTS ARE NOT COVERED HEREIN, PLEASE DON'T HESITATE TO CONTACT US, AND WE WILL REPLY PROMPTLY.