DEVICE FOR WELL BOTTOM FLUSHING Russian patent published in 2018 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas production industry and can be used for capital and current repair of wells associated with the cleaning of their faces from sand and proppant plugs. Device comprises a housing, a plug with side openings, a tip and a return spring. Tip is attached to the bottom of the casing, which is mounted on the casing with the ability to move relative to the latter, a return spring is installed between the casing and the casing. From below, the return spring rests on the thrust ring, mounted on the inner shoulder of the casing, and on top – in the outer protrusion of the casing. Above the tip there is a seat for interaction with a plug connected to the body. In the inner channel of the plug, a tube is fixed, the upper end of which is made dull, and radial channels are provided in the side wall, communicating the inner cavity of the tube with the cavity of the housing. Lower end of the tube is equipped with a water jet nozzle.

EFFECT: improved reliability of the device and the efficiency of cleaning the bottom of the well.

1 cl, 1 dwg