MULTILATERAL WELL COMPLETION STRING, A MULTILATERAL WELL SYSTEM AND METHOD FOR PRODUCTION FROM A MULTILATERAL WELL SYSTEM Russian patent published in 2023 - IPC E21B41/00 E21B43/14 E21B21/08 E21B17/18 

FIELD: oil and gas.

SUBSTANCE: group of inventions relates to a multilateral well completion string, a multilateral well system and a method for production from a multilateral well system. The multilateral well completion string comprises the first tubing string, the second tubing string, the third tubing string, the first flow control device, the second flow control device, the third flow control device, the lower completion area. The first tubing string defines a first fluid conduit configured to receive the first fluid received from the first wellbore. The second tubing string is located around the first tubing string. The first tubing string and the second tubing string define an inner annulus that defines a second fluid conduit configured to receive a second fluid obtained from the second sidetrack. The third tubing string is located around the second tubing string. The second tubing string and the third tubing string define an outer annulus that defines a third fluid conduit configured to receive a third fluid obtained from a third sidetrack. The first flow control device is connected to the first fluid conduit and configured to control the first fluid. The second flow control device is connected to the second fluid conduit and configured to control the second fluid. The third flow control device is connected to the third fluid conduit and configured to control the third fluid. The first tubing string, the first flow control device, the second tubing string, the second flow control device, the third tubing string, and the third flow control device form at least a portion of the upper completion area. The lower completion area is connected to the downhole end of the upper completion area. The lower completion area is configured to extend up to the first wellbore and the second and third sidetracks.

EFFECT: increased flow of produced fluid.

13 cl, 8 dwg, 1 tbl