Jar Intensifier
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The ZJS type jar intensifier is a downhole fishing jar designed to increase jarring energy. This drilling jar accessory is made to be used in conjunction with CSJ type super jars or VJS type hydraulic up jars. The primary function of the jar intensifier is to supply acceleration to the upper end of the jar during the free jarring stroke.
Specifications| Parameter/ Type | | | | |||
| OD(mm) | 203 | 178 | 159 | 146 | 121 | 114 |
| ID(mm) | 71 | 57 | 57 | 57 | 38 | 38 |
| Pull down overall length(mm) | 4010 | 4000 | 4500 | 4000 | 3340 | 3340 |
| Stroke(mm) | 330 | 310 | 330 | 330 | 250 | 250 |
| Thread conn. | 6 5/8REG | NC50 | NC50 | NC40 | NC38 | NC31 |
| Max. tensile load(kN) | 2200 | 1800 | 1500 | 1200 | 900 | 800 |
| Sealing pressure(MPa) | 20 | 20 | 20 | 20 | 20 | 20 |
| pull down full stroke force (T) | 62-67 | 75-85 | 60-65 | 35-40 | 30-35 | 25-30 |
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