DRIVE FOR MULTILATERAL WELL SYSTEM Russian patent published in 2021 - IPC E21B41/00 E21B34/06 

FIELD: mechanical engineering.

SUBSTANCE: group of inventions relates to the field of multihole well completion. The access system of a lateral wellbore for moving the insulating sleeve relative to the completion sleeve window for regulating window access is comprised of a drive comprising an insulating sleeve coupling mechanism and a drive mechanism. The insulating sleeve coupling mechanism is configured to engage with the insulating sleeve. The drive mechanism is configured to reciprocate in the longitudinal direction of the insulating sleeve coupling mechanism within the completion sleeve channel for movement in the longitudinal direction of the insulating sleeve connected with the insulating sleeve coupling mechanism within the channel relative to the completion sleeve window for regulating the position of the insulating sleeve relative to the completion sleeve window. The end of the insulating sleeve is comprised of an engaging apparatus configured to receive a retrieval tool. The insulating sleeve is made removable from the completion sleeve by means of said engaging apparatus. The well system is comprised of a primary wellbore defining an outlet of a casing string, a secondary wellbore extending from the outlet of the casing string, and an insulating window unit located within the primary wellbore. The insulating window unit is comprised of a completion sleeve, an insulating sleeve and a drive. To implement the method of multihole well completion, a casing string is provided, wherein the casing string defines a casing string outlet and has a secondary wellbore extending from the casing string outlet. A completion sleeve is provided with a longitudinal axis, a channel and a window aligned with the casing string outlet. The window is at least partially located along the longitudinal axis to provide access to the channel. The insulating sleeve is moved axially within the completion sleeve to adjust the position of the insulating sleeve relative to the completion sleeve window.

EFFECT: achieved is increased precision of access to the lateral wellbore and volume control of produced liquid.

15 cl, 8 dwg