FIELD: oil and gas production.
SUBSTANCE: device for actuating packing element of packer consists of hollow case with stepped radial orifice, with at least one overlapped hollow sheared element, of positioner ensuring specified algorithm of positions of device by means of valve unit made in wall of case in form of local axial link with spring loaded piston-pusher installed in axial channel, at least in one. Over-piston space of the piston-pusher is connected with a cavity of the sheared element.
EFFECT: reliability of packering, maintaining specified pressure of packering.
2 dwg
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