DEVICE FOR OIL PRODUCTION WITH DOWNHOLE SEPARATION Russian patent published in 2016 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry, and, in particular, to the production of oil separated from gas and water by a sucker rod pump from the well with high yield. The device includes an inserted or uninserted sucker rod pump, suction and discharge valves, a stem and a lift string, a filter installed below the suction valve. At the wellhead a control station with a frequency converter is installed to regulate the operation of the sucker rod pump. On the outside surface of the lift string an additional downhole pipeline is secured. It ensures the hydraulic link of its bottom part with the lift string below the level of the filter installation, and of the top part with the downhole space below the dynamic level, but above the water-oil border. There is a pressure diaphragm connected by the rod with the bottom part of the filter. The lift string has a lock support for installation in it of the inserted sucker rod pump or the suction valve of the uninserted sucker rod pump. It is made with a liner ensuring the possibility of the hydraulic link of the well bottom zone with the lift string and additional downhole pipeline. At that in the work position of the device the hydraulic link of the well bottom zone with the lift string is ensured via the additional downhole pipeline, and simultaneously the disconnection of the hydraulic link between the sucker rod pump and the internal cavity of the casing string via the liner is ensured due to the tight closing of the liner by the separator.

EFFECT: increased efficiency of oil production due to reduced volumes of produced water.

2 cl, 2 dwg