Expandable Elastomeric Sealing Layer for Rigid Wellbore Devices
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Solution Overview
Problem
High-expansion rigid sealing devices often fail to form a sufficient seal due to gaps when expanded, leading to potential damage and leakage, as existing sealing layers may not be expandable or can be extruded through these gaps, resulting in premature failure and costly remediation.
Innovation Solution
A high-expansion sealing layer with mesh reinforcement, comprising an elastomeric layer and a reinforcement layer, which is expandable and resistant to extrusion through gaps, maintaining a seal even as the rigid sealing device expands, thereby reducing degradation and ensuring a durable seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an expandable sealing layer is used with a rigid sealing device, then the sealing layer can accommodate the expansion of the rigid sealing device, but the sealing layer may be extruded through the gaps in the rigid sealing device as it expands
Solution Approach 1:
The sealing layer is constructed as a composite structure combining an elastomeric material with a reinforcement layer. The elastomeric material provides expandability and sealing capability, while the reinforcement layer prevents extrusion through gaps during expansion. This composite structure resolves the contradiction by integrating materials with complementary properties that simultaneously achieve adaptability and reliability.
2Reliability
If the sealing layer is made more robust to prevent extrusion, then seal integrity is improved, but the sealing layer may not be able to expand sufficiently to cover gaps
Solution Approach 1:
The composite structure of an elastomeric layer combined with a reinforcement layer allows the sealing layer to simultaneously achieve high expandability and structural integrity. The elastomeric material enables significant expansion to cover gaps, while the reinforcement layer maintains sufficient strength to prevent extrusion, thus resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The sealing layer is divided into functionally distinct components: an elastomeric layer responsible for expansion and sealing, and a reinforcement layer responsible for preventing extrusion. This segmentation allows each component to optimize its specific function without compromising the other, enabling both high expandability and seal integrity.
3Device complexity
If a non-expandable sealing layer is used, then the structure is simpler, but the sealing layer cannot accommodate the expansion of the rigid sealing device
Solution Approach 1:
The sealing layer utilizes an elastomeric material that forms a flexible structure capable of significant expansion. This flexible elastomeric layer can accommodate the expansion of the rigid sealing device while maintaining sealing effectiveness, resolving the contradiction between structural simplicity and expandability.
4Ease of manufacture
If the sealing layer is made thinner to reduce complexity, then manufacturing is easier, but the sealing layer may degrade prematurely under pressure
Solution Approach 1:
The composite structure combines a thinner elastomeric layer with a reinforcement layer, achieving both ease of manufacture and high durability. The thin elastomeric layer is easy to manufacture and provides sealing functionality, while the reinforcement layer adds the necessary strength and durability to withstand pressure without premature degradation.
Solution Approach 2:
The sealing layer is segmented into a thin elastomeric layer for sealing and a reinforcement layer for structural strength. This segmentation allows the elastomeric layer to remain thin and easy to manufacture while the reinforcement layer provides the durability needed to withstand operational pressures.
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 reinforced sealing layer effectively spans gaps and maintains pressure integrity, preventing leakage and extending the durability of the seal, even under high-expansion conditions, thus ensuring successful wellbore sealing operations.
Implementation Method 1
an expandable sealing layer disposed around an outer diameter of the rigid sealing device. The expandable sealing layer may include an elastomeric layer and a reinforcement layer
Implementation Method 2
The reinforcement layer may prevent extrusion of the elastomeric layer into the gaps
Data Source
AI summary
Included are wellbore sealing systems and methods of use. An example wellbore sealing system comprises a rigid sealing device capable of expansion and having an exterior having holes disposed therethrough; and an expandable sealing layer disposed around the rigid sealing device. The expandable sealing layer comprises an elastomeric layer and a reinforcing layer.