DEVICE FOR DOSED REAGENT SUPPLY TO WELL Russian patent published in 2014 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil producing industry and may be used to prevent corrosion and deposits in the equipment. The device comprises an electric pump metering unit, a pressure line represented by a rigid hose connected by an input device installed in the wellhead equipment with capillary pipeline passing at exterior surface of the tubing string and the pumping unit at which lower ends there is a hanger, a spraying device and centralizer. The input device of the capillary pipeline is mounted in side outlet of wellhead equipment as a tube with blind equipped with the central channel. From outside the blind channel is connected to the pressure line and from inside it is connected to the upper end of the capillary pipeline with sealing option in the blind. Between the side outlet and blind the tube is equipped with a branch with an angular valve. The capillary pipeline is made as a polymer armoured cable and in the hanger it is connected to the hollow rod connected rigidly to the hanger from the top. At the lower end of the hollow rod there is a spraying device equipped with an adjustable return valve.

EFFECT: increasing reliability and efficiency and reducing specific quantity of metal.

2 dwg