Hydraulic double
acting

Hydraulic Double Acting Jar is hydraulically controlled and works in both directions, with impact force controlled by the operator. The jar does not incorporate a mechanical section.
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Hydraulic double acting jars

The SOKOL Drilling motors and tools Hydraulic Double Acting Jar is hydraulically controlled and works in both directions, with impact force controlled by the operator. The jar does not incorporate a mechanical section. Up jarring force is controlled by the amount of the drill string tension during the hydraulic delay, and down jarring force — by the slack of weight during the hydraulic delay.

The SOKOL Hydraulic Double Acting Jar is operated by a simple up and down motion and is unaffected by right- or left-hand torque. Standard seals are suitable for use up to 120°C. Optional high temperature seal kits are available suitable for service up to 200°C. External sealing surfaces are tungsten carbide-coated to enhance wear and corrosion resistance.

Technical specification

Size 86mm (3 3/8”) 108mm (4 ¼”) 121mm (4 ¾”) 172mm (6 ¾”) 203mm (8")
Max OD, mm 86 110 124 176 207
Length, mm 5 400 6 400 5 800 5 900 6 400
Stroke, mm 533 635 635 635 635
Pump open area, cm2 38 57 76 153 198
Min thru bore, mm 38 50 57 70 70
Max pull during delay, kgf 22 600 31 700 38 500 86 100 108 800
Tensile yield, kgf 63 900 81 900 100 900 325 300 352 100
Torsional limit, kgf*m 600 1 000 1 400 3 900 6 200
Tool joint (may be customized) NC 26 NC 31 NC 38 NC 50 6 5/8 Reg
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