Patent ID: 11867030
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A downhole tool, comprising:
an isolation system for placement at a junction between a first wellbore and a secondary wellbore, the isolation system including:
an elongated tubular, the elongated tubular having an opening connecting an interior of the elongated tubular and an exterior of the elongated tubular;
a slot located in the elongated tubular, the slot spanning the opening;
an isolation sleeve located within the isolation system, the isolation sleeve configured to slide within the slot to either isolate the interior of the elongated tubular from the exterior of the elongated tubular or provide access between the interior of the elongated tubular and the exterior of the elongated tubular; and
an I-shaped seal located in an annulus between the elongated tubular and the isolation sleeve, the I-shaped seal including:
first and second opposing members; and
a central member separating the first and second opposing members, the central member defining first and second fluid cavities, wherein the isolation sleeve is a permanent fixture within the isolation system, wherein the elongated tubular includes an uphole no-go profile and a downhole no-go profile, the uphole no-go profile and the downhole no-go profile preventing the isolation sleeve from sliding out of the isolation system, and wherein:
the isolation sleeve is configured to abut the uphole no-go profile when the isolation sleeve is isolating the interior of the elongated tubular from the exterior of the elongated tubular, and configured to abut the downhole no-go profile when the isolation sleeve is providing access between the interior of the elongated tubular and the exterior of the elongated tubular; or
the isolation sleeve is configured to abut the downhole no-go profile when the isolation sleeve is isolating the interior of the elongated tubular from the exterior of the elongated tubular, and configured to abut the uphole no-go profile when the isolation sleeve is providing access between the interior of the elongated tubular and the exterior of the elongated tubular.