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DESCRIPTION

Johnston Fishing Jars (hydraulic jars) deliver impact at any hydrostatic pressure and they hit quick, hard and long – even at bottom-hole temperatures up to 400 degrees Fahrenheit.

SPECIFICATIONS

Pressure-balancing system:

Allows continuous hitting at any hydrostatic pressure

Faster jarring:

Damage-resistant delay mechanisms allow faster jarring

Durable:

Aircraft-quality, AISI 4340, electric furnace steel in all critical parts for durability

Tolerances:

Up to 5/1000 of an inch

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