DEVICE FOR SEPARATE PUMPING OF LIQUID TO TWO FORMATIONS Russian patent published in 2013 - IPC E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: device includes a housing with through and radial holes, a limit stop in lower part and guide conical surfaces in upper part, a nipple with upper and lower sealing joints, which is arranged in the housing, with radial holes, a limit stop in lower part and a groove on outer surface, a cylindrical seat arranged in the nipple with possibility of covering radial holes of the nipple, a spring under the cylindrical seat, and a ball released to the device at its operation. Radial holes of the housing and the nipple are coaxial and have a downward inclination by the value of projecting part of the ball arranged in the cylindrical seat, with location of the bottom of radial holes of the nipple on the level of upper ball part. Volume of the chamber formed with a groove on outer surface of the nipple and inner surface of the housing is equal to sum of volumes of radial holes of the nipple and the housing.

EFFECT: reduction of hydraulic resistances at simultaneously separate water pumping.

2 dwg