Multilateral Junction Deflector for Wellbore Isolation
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Solution Overview
Problem
In multilateral wellbore operations, there is a need for effective temporary isolation of wellbores from pressure and debris during production and maintenance operations to prevent fluid flow and contamination, which existing technologies do not adequately address.
Innovation Solution
The use of an isolation sleeve and deflector system that forms fluid and pressure tight seals at the intersection of main and lateral wellbores, with optional degradable plugs to facilitate resumption of fluid flow, allowing for temporary isolation and subsequent restoration of flow without manual removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual removal of plugs is used to resume fluid flow, then flow can be restored, but operational time and complexity increase
Solution Approach 1:
The plug is designed with a dissolvable core material that automatically degrades and breaks down over time, allowing the plug to self-dissolve and resume fluid flow without requiring manual intervention or retrieval operations
Solution Approach 2:
The plug utilizes changes in physical-chemical parameters of the core material (such as dissolution rate, degradation time) to control the timing and mechanism of flow resumption, transforming the plug from a permanent barrier to a temporary, time-dependent barrier
Data Source
AI summary
A wellbore isolation system includes a junction positioned at an intersection of a first wellbore and a second wellbore, and a deflector disposed in the junction such that a path into the first leg of the junction is obstructed and engaged with the first leg of the junction to form a fluid and pressure tight seal. The junction includes a first leg extending downhole into the first wellbore, and a second leg extending downhole into the second wellbore.