FILTER FOR UNDERGROUND GAS STORAGES Russian patent published in 2024 - IPC E21B43/08 

FIELD: gas industry.

SUBSTANCE: invention relates to construction and operation of gas wells in underground gas storage facilities. The device contains a body, on the outer surface of which there is a number of longitudinal grooves with stringers located between them, and circulation holes, a filter shell made of turns of winding wire of a triangular profile, a casing with holes blocked by a check valve in a cylindrical groove. The body is equipped with a connecting coupling at the upper end, a support ring in a technological groove on the stringers to form channels with longitudinal grooves in the body. On the outer side of the body, there is an external filter shell in the form of a hollow cylinder with through longitudinal grooves, between which stringers are formed, at the ends of which there are jumpers with holes for fixing the ends of the winding wire. The casing is installed at the lower end of the housing to form an annular chamber hydraulically connected by circulation holes in the body of the housing with its axial channel, channels under the support ring, and holes in the casing blocked by a check valve. The coupling and the casing are installed at the ends of the body with the possibility of covering jumpers on the outer filter shell. The coils of winding wire on the body and the outer filter shell have a triangular profile and are oriented with their vertices towards each other.

EFFECT: filtration ability during both gas injection and gas extraction, prevention of filter clogging, and an optimal pressure drop for uninterrupted operation of the filter.

1 cl, 6 dwg