FIELD: oil production, particularly well development and oil production stimulation.
SUBSTANCE: mobile through hydroimpulsive rig comprises hydroimpulsive pump with pressure accumulator connected thereto. Pressure accumulator comprises check valve with locking member, namely ball, valve seat and rod. Pressure accumulator is arranged in lower part of downhole rig. The rod is hollow and carries seat. Ball is made of steel and may be dropped onto valve seat after reactive bath accompanied by hydraulic impacts application through hollow rod. Pressure accumulator has resilient valve and sized orifice, which create additional hydraulic impact.
EFFECT: increased technological and economical efficiency of well development methods, possibility to clean bottomhole reservoir zone and improved oil production stimulation due to creation of multiple depressions with reactive bath forming in under-packer zone in one trip.
4 cl, 1 dwg
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