Non-Extrusion Ring for Packer Seal Stability
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Solution Overview
Problem
Existing packer systems for conduits, such as oil and gas wells, face challenges in achieving a reliable seal and stability due to extrusion issues during assembly and operation.
Innovation Solution
The packer system incorporates non-extrusion rings with rigid segments arranged vertically and enveloped by an elastomeric matrix, which expand to form a seal when engaged, along with support rings and forcing cones to secure the mandrel within the conduit, enhancing stability and seal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional packer systems are used, then assembly and conveyance are simpler, but stability of the packing unit and seal reliability deteriorate due to extrusion issues
Solution Approach 1:
The non-extrusion ring is divided into multiple rigid segments arranged in a vertically overlapping manner, allowing each segment to independently expand and form a reliable seal against the conduit wall while preventing extrusion of the packing element
Solution Approach 2:
The non-extrusion ring combines rigid segments with an elastomeric matrix to create a composite structure that provides both structural integrity and sealing capability, preventing extrusion while maintaining seal reliability
2Reliability
If non-extrusion rings with rigid segments are used, then seal reliability improves, but assembly efficiency and conveyance difficulty worsen
Solution Approach 1:
The rigid segments are pre-assembled in a vertically overlapping configuration within the elastomeric matrix before deployment, allowing for efficient conveyance through the conduit while maintaining the capability to expand into a reliable seal when engaged
3Object-generated harmful factors
If rigid segments are arranged vertically overlapping, then extrusion prevention improves, but manufacturing complexity increases
Solution Approach 1:
The elastomeric matrix envelops and bonds the rigid segments together, creating a unified non-extrusion ring structure that prevents extrusion while simplifying the manufacturing process through a single integrated component rather than multiple separate parts
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
The solution provides a more efficient assembly and a reliable seal by preventing extrusion and ensuring the packer's stability, thereby improving the overall performance of the packing unit.
Implementation Method 1
bonded together and enveloped by an elastomeric matrix
Implementation Method 2
when engaged, the rigid segments of the non-extrusion ring expand towards the casing to form a seal
Data Source
AI summary
Embodiments of the present disclosure generally provide a packer for use within a conduit, such as casing, having non-extrusion rings. The non-extrusion ring is comprised of rigid segments, a support ring and an elastic matrix.