FIELD: well drilling, particularly, devices for sealing of point of intersection of parent and branch wells. SUBSTANCE: sealing device includes section of tubular parent casing located in parent well in zone of branching point, and section of branch casing located in branch well and secured with section of parent casing and wedge-like member with chamfered surface made for engagement with chamfered surface made for engagement with chamfered surface of section of parent casing. EFFECT: provided effective sealing of intersection point of parent and branch wells. 8 cl, 3 dwg
