Drilling Jar

Drilling Jar
Drilling Jar
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The ZSJ type drilling jar and ZSJ type drilling down jar can be used mutually or operated separately. The up jarring section uses a hydraulic mechanism that can adjust the faring force to elevate the load but will not exceed the maximum for the rated tool load. The down jarring section uses a mechanical friction mechanism to produce a jarring force that must be pre-adjusted prior to being placed in the downhole. Both are effective at keeping your drilling equipment from remaining in a stuck position.

Specifications
Parameters/ type ZSJ80B ZSJ76B ZSJ70B ZSJ62B ZSJ56B ZSJ46B
ZXJ80B ZXJ76B ZXJ70B ZXJ62B ZXJ56B ZXJ46B
OD(mm) 203 197 178 160 146 121
ID(mm) 71.4 71.4 70 57 57 51
Pull down overall length(mm) up 5515 5515 5424 5360 5730 5300
down 5250 5250 5215 5215 5000 4760
pull down stroke(mm) up 368 368 344 344 332 305
down 178 178 178 178 180 178
Thread conn. 6 5/8REG 6 5/8REG NC50 NC46 4 1/2FH NC38
Max. tensile load(kN) 2500 2500 2300 2200 2000 1400
Max. working torque(kN.m) 20 18 15 15 15 13
Rated release force for up jar(kN) 400-600 400-600 350-550 300-450 200-350 150-250
Max. up jarring released force (kN) 750 750 550 550 450 270
Max. down jarring released force(kN) 600 600 550 500 400 250

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