FIELD: mining.
SUBSTANCE: invention relates to mining, in particular to oil industry, and can be used for damping of axial loads at operation of perforators lowered on tubing or drilling pipes, in oil and gas producing wells. Tubing damper comprises a rod equipped with a pusher with a protruding part inserted into the tip, a body equipped with serially arranged above the tip shear screws, holes for fluid flow with plugs and bursting discs, and a spring. Total area of holes in housing is selected to provide maximum displacement of pusher, which does not exceed value of working stroke of compression spring.
EFFECT: controlled and soft damping of axial forces from explosion products and action of shock wave due to three-step damping.
1 cl, 1 dwg
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