HYDROMECHANICAL PACKER Russian patent published in 2012 - IPC E21B33/12 

FIELD: gas and oil production.

SUBSTANCE: hydromechanical packer includes tube with radial ducts and support at the bottom, hydrocylinder with piston, split collet with anchor, connected to the hydrocylinder from below, sealing ring, seat in the tube bottom. Outside under the anchor, split collet is equipped with cone-shaped surface arranged with the possibility to interact with piston. Split collet features internal hooks at the bottom, and the cylinder is narrowed from inside towards top. Moving bushing spring-loaded by the piston and capable of resting at internal collet hooks when expanded is installed outside the pipe below piston, and the pipe features additional radial holes above the support, covered from outside by moving bushing in transportation position and opening when moved below collet.

EFFECT: easy retrieval from well, multiple utilisation without retrieval, withstanding any pressure shifts in the well space divided by packer and insulating zones of flush absorbing solution with additives.

2 dwg