Main Products: Petroleum Equipments
Type DHJ 203 Mechanical Hydraulic Shock Sub
USD $50 - $2,000 /Set
Min.Order:1 Set
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Sinotai Petroleum Equipment Co., Ltd.
Credit Member 4 years 
Business Type: Trading Company
Shandong ChinaMain Products: Petroleum EquipmentsProduct Details
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) |
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