DEVICE FOR SEGREGATION OF FORMATIONS OR PRODUCTIVE STRATUM OF HORIZONTAL WELL INTO SEPARATE AREAS Russian patent published in 2013 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: device for segregation of formations or productive stratum of a horizontal well into separate areas includes interconnected corrugated longitudinal pipes with encapsulated components located at the areas with less circumscribed circle. The device also includes the upper and lower cylindrical areas. The lower area is equipped with shoe while the lower one is equipped with landing adapter. Encapsulated components are designed as closed components along tube perimetre. End sections of corrugated longitudinal pipes are welded and made as corrugated longitudinal gaged bells with circumscribed diameter bigger or equal to the circumscribed diameter of encapsulated components. Thickness of encapsulated components and distance between them can be adjusted without mutual overlapping in case of extension by rolling device after correction by inner pressure.

EFFECT: tightness of borehole annulus closure at significant pressure drop, required forcing down of encapsulated components, exclusion of accumulation of sealing material, improvement of reliability in segregation between wellbore walls and the device.

4 dwg