Jar Intensifier

Jar Intensifier
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 ZJS203B ZJS178B ZJS159B ZJS146B ZJS121B ZJS114
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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