FIELD: mining.
SUBSTANCE: device comprises a body, units of driving and picking oscillations, a membrane, a line of bottomhole linkage with a wellhead, a pressure converter in the form of a multi-turn tubular spring with pins fixed on its free end, in the gap between which there is a spiral inserted from a mechanical oscillating system of balance-spiral. The free end of the spring may move along the spiral circumference, varying its operating length.
EFFECT: enhanced reliability.
1 dwg
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