Annular Bypass Packer With Nested Conduits and Swelling Seal
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Solution Overview
Problem
In oil and gas exploration, existing packers struggle to efficiently isolate well zones while allowing fluid flow, often requiring large bypass flow tubes that compromise sealing reliability and increase installation time.
Innovation Solution
The introduction of an annular bypass packer with a swelling element and bulkhead manifold, which forms a seal against the wellbore wall and facilitates fluid flow between zones without the need for large bypass tubes, using a first conduit and a second conduit formed by the outer surface of the first conduit, allowing for efficient fluid isolation and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large bypass flow tubes are used to facilitate fluid flow between zones, then fluid flow efficiency is improved, but sealing reliability deteriorates and installation time increases
Solution Approach 1:
The packer is divided into multiple functional segments: a swelling element for sealing, a bulkhead manifold for fluid distribution, and multiple conduit options (first conduit through fourth conduit) for different flow paths. This segmentation allows each component to be optimized independently, enabling reliable sealing while providing multiple pathways for efficient fluid flow without requiring large bypass tubes.
Solution Approach 2:
The patent employs a nested configuration where the first conduit is positioned within the second conduit, and the third conduit is positioned within the fourth conduit. These nested conduits are all surrounded by the swelling element. This nested doll structure allows multiple fluid flow paths to be integrated within a compact sealing structure, eliminating the need for large external bypass tubes while maintaining sealing integrity.
2Productivity
If large bypass flow tubes are used to facilitate fluid flow, then fluid flow efficiency is improved, but installation time increases
Solution Approach 1:
The nested conduit configuration allows all flow paths to be integrated within a single packer body during installation. The first conduit through fourth conduit are nested within each other and surrounded by the swelling element, forming a compact unit that can be installed as one component rather than requiring separate installation of large bypass tubes, thereby reducing installation time while maintaining multiple fluid flow paths.
Solution Approach 2:
The patent merges the functions of multiple conduits and the sealing element into a single integrated packer assembly. The bulkhead manifold combines fluid distribution functions, and all conduits are integrated within the swelling element structure. This consolidation eliminates the need for separate large bypass tube installations, reducing installation time while providing efficient fluid flow pathways.
3Reliability
If traditional packer structures are used to isolate well zones, then sealing is achieved, but fluid flow management between zones becomes inefficient
Solution Approach 1:
The packer structure is segmented into multiple independent conduit systems (first conduit, second conduit, third conduit, fourth conduit) that can operate simultaneously with different flow paths. The swelling element is segmented to seal around all conduits. This segmentation enables efficient fluid flow management through multiple pathways while maintaining reliable sealing around each conduit, allowing simultaneous isolation and flow management of multiple zones.
Solution Approach 2:
The bulkhead manifold provides multi-functionality by distributing fluid to multiple conduits (first conduit through fourth conduit) from a single structure. The swelling element simultaneously seals around all conduits and provides zone isolation. This universal design enables the packer to perform multiple functions - sealing, fluid distribution, and zone isolation - within a single integrated structure, improving fluid flow management efficiency while maintaining sealing reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances fluid flow management across well zones, reduces the need for large bypass tubes, and improves sealing reliability, thereby increasing operational efficiency and reducing installation time.
Implementation Method 1
The swelling element is operable to form a seal against a wellbore wall upon exposure to a swell fluid
Data Source
AI summary
A system for facilitating fluid flow to a wellbore includes a packer having a first conduit and a second conduit adjacent to the first conduit. A portion of the second conduit is formed by an outer surface of the first conduit. The packer also includes a swelling element that surrounds and radially encloses the first conduit and second conduit. The first end of the packer includes a bulkhead manifold having a transition section that forms a fluid coupling from at least one external bypass conduit to the second conduit, and the swelling element is operable to form a seal against a wellbore wall upon exposure to a swell fluid. The first end of the packer is fluidly coupled to the fluid supply source via an external bypass conduit, and the second conduit is fluidly coupled to the annulus of the wellbore at the second end of the annulus bypass packer.