DEVICE FOR WELL COMPLETION AND TREATMENT OF BOTTOM-HOLE FORMATION ZONE (VERSIONS) Russian patent published in 1997 - IPC

FIELD: oil production. SUBSTANCE: device combines functions of jet pump and hydrodynamic pulsator. The device for well completion based on ejector of fluid from formation is provided with additional device which is hydrodynamically connected in special manner with jet apparatus and serves as pressure pulse generator. The device with packer is run into well on tubing string. When working fluid is injected into tubing string, the device functions as jet pump. When working fluid or some chemical agent is injected to annular space, the device operates as hydrodynamic pulsator and injects the fluid into formation. Two versions of device designs are offered. EFFECT: improved design. 4 cl, 4 dwg