PACKER Russian patent published in 2009 - IPC E21B33/126 F04B47/00 F04D13/10 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mechanical engineering and can be used for oil and gas production. Packer includes body, rod, upper and lower switchers, in-body cup and hydraulic cylinder. There is an annular space provided between hydraulic cylinder and rod, and containing a piston. The annular space cavity above the piston is connected to producing string column through the hole formed in the rod. The hydraulic chamber is formed with the hydraulic cylinder and the rod and filled with liquid. Between hydraulic chamber and annular space in the hydraulic cylinder, there is a packing sleeve with a slot used to connect cavity of the hydraulic chamber to the annular space cavity. The slot is stopped with valve arranged in the annular space below the packing sleeve. The valve is supported on the piston mounted below in the annular space and fixed in its initial upper position relative to the hydraulic cylinder with shear screws. The sealing cup is provided on the body between upper and lower protective collars. The upper protective collar is supported on upper switch, and the lower protective collar rests on the hydraulic cylinder through retainer num in-between.

EFFECT: higher downhole performance especially that of several beds with selective processing using number of packers.

1 dwg