Fishing Bumper Subs

Fishing Bumper Subs
Fishing Bumper Subs
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These fishing bumper subs are special mechanical down jarring tools with a long working stroke. They can apply large jarring forces on stuck pipe stems repeatedly to release the drilling components.

The fishing bumper sub is a kind of mechanical down jarring tool with long working stroke. It can jar stuck pipe stem repeatedly to loose stuck point to release stuck pipe.

Specifications
Parameter/ Type KXJ80B kXJ70B KXJ62B KXJ56B KXJ46B KXJ44B
OD(mm) 203 178 159 146 121 114
ID(mm) 70 70 51 51 38 38
Closed length(mm) 2740 2650 2600 2300 2110 2000
Work stroke(mm) 1500 1400 1400 1200 1000 1000
Thread conn. 6 5/8REG NC50 NC50 NC40 NC38 NC31
Max. tensile load(T) 163 153 143 132 122 112
Sealing pressure(MPa) 20 20 20 20 20 20

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