One-Way Shock Absorbers
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The YJ type one-way shock absorber is a drilling tool which affects shock absorption through elastic deformation and damping. The shock absorption system can fully overcome impacts and shocking loads from drill strings during drilling operations. Using the shock absorber can increase the service life for drill bits and drill tool, speed up drilling and protect surface equipment.
Specifications| Parameter/ Type | |||||
| OD(mm) | 229 | 203 | 178 | 160 | 121 |
| ID(mm) | 70 | 64 | 57 | 47 | 38 |
| Pull down overall length(mm) | 3820 | 4100 | 3800 | 3980 | 3950 |
| Max. stroke(mm) | 150 | 150 | 120 | 120 | 121 |
| Thread conn. | 7 5/8REG | 6 5/8REG | NC50 | NC46 | NC38 |
| Tensile load(kN) | 2000 | 2000 | 1500 | 1500 | 1000 |
| Max. bit weight | 539 | 490 | 392 | 343 | 265 |
| Ambient temperature ( ℃ ) | -40~150 | -40~150 | -40~150 | -40~150 | -40~150 |
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