DEVICE FOR REAGENT DELIVERY INTO WELL Russian patent published in 2020 - IPC E21B37/06 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and is intended for servicing and efficient operation of deep-pumping equipment of oil producing wells, complicated by water-oil emulsion and asphalt-resin-paraffin deposits. Device contains a pipe for supply of reagent inside the flow column and a pump on the ground surface for pumping into the reagent tube, a cylindrical casing-container with a deep-flow electric centrifugal pump and a submersible electric motor inside. Reagent supply pipe is arranged along whole length of flow string from well head to bottom pump and is hermetically connected to valve-adapter, which is located above the electric-centrifugal pump and has by means of radial channels hydraulic connection with annular space of the container casing.

EFFECT: enabling supply of the required process reagent not only to the tubing string, but also to the cavity of the subsurface pump, complex protection of the whole chain of underground equipment is implemented, which includes measures to prevent complications and remove formed deposits.

1 cl, 2 dwg