Packer Non-Extrusion Ring Hard Segments Elastomeric Matrix
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Solution Overview
Problem
Conventional packers used in conduits, such as oil and gas wells, face challenges in effectively sealing against fluid flow due to extrusion issues, where the sealing elements can be pushed out or compromised by pressure, leading to leaks and reduced effectiveness.
Innovation Solution
A packer system incorporating a non-extrusion ring composed of hard segments and an elastomeric matrix, which is designed to maintain its shape and form a secure seal within the conduit by using forcing cones to expand and engage the ring, preventing extrusion and ensuring a reliable seal between the mandrel and the conduit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sealing elements are used in packers, then the device can be simpler in structure, but the sealing effectiveness deteriorates due to extrusion under pressure
Solution Approach 1:
The non-extrusion ring employs a composite structure combining hard segments (providing extrusion resistance) with an elastomeric matrix (providing sealing flexibility). This composite material approach allows the sealing element to maintain its shape under pressure while still conforming to the conduit surface, resolving the contradiction between sealing effectiveness and structural simplicity.
2Strength
If the sealing element is made harder to prevent extrusion, then extrusion resistance improves, but the ability to conform to the conduit surface and seal effectively deteriorates
Solution Approach 1:
The non-extrusion ring is divided into discrete hard segments embedded within the elastomeric matrix. This segmentation allows each hard segment to provide localized extrusion resistance while the elastomeric matrix between segments maintains flexibility and conformability to the conduit surface, thus achieving both extrusion resistance and sealing effectiveness.
Solution Approach 2:
Different regions of the non-extrusion ring have different properties: the hard segments provide rigidity and extrusion resistance where needed, while the elastomeric matrix provides flexibility and conformability in other regions. This local differentiation of material properties resolves the contradiction between hardness for extrusion resistance and softness for sealing effectiveness.
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 non-extrusion ring effectively prevents extrusion and maintains a tight seal under pressure, enhancing the packer's ability to contain fluids and withstand operational conditions, thereby improving the reliability and durability of the sealing mechanism.
Implementation Method 1
The non-extrusion ring is comprised of hard segments and an elastomeric matrix
Implementation Method 2
using forcing cones to expand and engage the ring
Data Source
AI summary
Embodiments of the present disclosure generally provide a packer for use within a conduit, such as casing, having a non-extrusion ring. The non-extrusion ring is comprised of hard segments and an elastic matrix.