FIELD: mining.
SUBSTANCE: group of inventions relates to multi-barrel completion of wells. Well system comprises the main borehole cased with casing pipe, which forms casing pipe outlet; a side borehole extending from the casing pipe outlet; re-entry window assembly installed in the main borehole and having completion window assembly having opening aligned with casing pipe outlet and providing upper coupling, guide tool shoe with skew cut, and upper and lower slotted holes made on axially opposite ends windows; an insulating bushing installed in the completion window assembly and comprising a key holding the bushing from bending, a bushing coupling and an engagement device, and a diverter assembly comprising a deflector configured to mate with the bush coupling, and a setting tool functionally connected to the deflector and configured to interact with the guide tool shoe with a skew cut for orientation at an angle of the deflector front surface relative to the opening. Insulating sleeve is made with possibility of movement between the first position, in which the engagement device is engaged with the upper coupling, and the insulating bushing closes the window, and the second position, in which the insulating bushing is engaged with the lower coupling, and the window is open. Key holding the sleeve against turning interacts with upper and lower slotted holes to support isolating bushing in specified orientation at angle during movement between first and second positions.
EFFECT: reduced number of required passages with intervention in multi-shaft well for servicing two or more side wellbore from common wellbore.
23 cl, 21 dwg
