DEVICE FOR BYPASS OF ANNULAR GAS Russian patent published in 2022 - IPC E21B34/08 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and is intended for the bypass of annular gas into the flow string, with the maintenance of excess gas pressure in the annular space of the well, when using rod pumps. The device for bypass of annular gas as part of the flow string contains an annular chamber with a check valve, inlet and outlet openings of the hydraulic channel. The device is made in the form of a housing connected through a coupling with the flow string. A shank is installed in the axial channel of the housing to form an annular chamber, blocked in the middle part by a seat rigidly connected to the housing and forming an annular gap with the shank. A spring-loaded annular piston with a pusher equipped with grooves at the end and passed through the annular gap between the seat and the shank is installed on the seat, with the possibility of end contact with the body of a check valve made in the form of a sleeve with an end protrusion. The inlet openings in the body of the housing and the outlet openings in the body of the shank are blocked by the body of the check valve in the initial position, the annular chamber above the check valve is connected by a hydraulic channel in the shank with its axial channel. The annular chamber under the annular piston is connected by holes to the annular space of the well.

EFFECT: ensuring the possibility of regulating the supply of annular gas to the flow string while maintaining the design gas pressure in the annular space and replacing the plug-in rod pump without lifting the flow string.

1 cl, 3 dwg