APPARATUS FOR SIMULTANEOUS SEPARATE OPERATION OF SEVERAL DEPOSITS AT SAME WELL (VERSIONS) Russian patent published in 2016 - IPC E21B43/14 E21B34/10 

FIELD: mining.

SUBSTANCE: group of inventions relates to devices for dual operation of several production facilities at the same well. Installation includes tubing string (TS) 6, pump unit 12 with stem 13 arranged on said string, packer 8 for separation of deposits 1 and 2 from each other, hydraulic channels, the number of which corresponds to the number of deposits, each connected with appropriate hydraulic channel, and all hydraulic channels are connected to common aggregated hydraulic channel, which is cavity 11 of the tubing string above pump unit 12, cutoff valve 14 arranged below pump unit 12 and configured to open/close hydraulic channel of bottom deposit to pump unit. Plant includes as per first version one packer 8 arranged between two deposits 1 and 2, the lower end of the tubing string is arranged below the packer or in its hydraulic channel, and pump unit 12 is arranged at said tubing above packer 8, but below top deposit 2. Besides, between pump unit 12 and cutoff valve 14 through return valve 16 is installed tightly joined with one side with stem 13, and on the other side, with valve 14 directly or through at least one tubing. Valve 16 comprises body and is equipped with two hydraulic channels 17 and 19 connected with pump unit, first of which is also connected to hydraulic channel of cutoff valve for the bottom deposit 1, and the second with side outlet into annular space 3 and including seat and shutoff valve with return spring, is intended for supply from annular space 3 of formation fluid from top deposit 2. Cutoff valve 14 is configured to open/close hydraulic channel of bottom deposit to the first hydraulic channel through a check valve by generating pressure via drop control hydraulic signal from the wellhead. According to the second version, the number of packers 8 and 24 is by one less than the number of deposits 1, 2, 3 and all are installed below top deposit 2 with separation of bottom deposits 1 and 23 from each other. Lower end of the tubing string is arranged below lower packer 8, and pump unit 12 is arranged at said tubing above upper packer 24, but below top deposit 2. Besides, between pump unit 12 and cutoff valve 14 through return valve 16 is installed tightly joined with one side with stem 13, and on the other side, with valve 14 directly or through at least one tubing. Flow check valve 16 and cutout valve 14 are of the same structure as per the first version.

EFFECT: technical result consists in excluding the effect of liquid from the bottom deposit to technological parameters of the top deposit at simultaneous provision of reliable operation in the presence of bottomhole pressure top deposit exceeding the bottom ones (reduced to one level).

22 cl, 4 dwg