Bias Fabric Reinforced ELH Element Anchoring
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Solution Overview
Problem
Expandable liner hangers in wellbore operations face challenges with extrusion and high load expansion of sealing elements due to substantial axial loads, especially in deep and subsea wells, leading to reduced sealing and anchoring capacity.
Innovation Solution
An improved downhole expandable liner hanger system featuring a reinforced rubber element bonded to a tubular body, with woven mesh or bias fabric reinforcement to enhance structural integrity and prevent extrusion, allowing for effective sealing and anchoring under high pressures and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing elements are used in expandable liner hangers, then sealing capacity is improved, but extrusion and high load expansion occur under substantial axial loads
Solution Approach 1:
The patent applies composite materials by combining rubber sealing elements with fabric reinforcement layers (such as bias fabric or woven mesh) to create a multi-layer composite structure. This composite construction provides both sealing capability from the rubber and extrusion resistance from the fabric reinforcement, directly resolving the contradiction between sealing capacity and resistance to extrusion under axial loads.
2Reliability
If sealing elements are used in expandable liner hangers, then sealing capacity is improved, but high load expansion occurs under substantial axial loads
Solution Approach 1:
The fabric-reinforced rubber composite structure provides enhanced structural integrity while maintaining sealing capacity. The fabric layers distribute and bear the substantial axial loads, preventing excessive expansion and deformation of the sealing elements, thus maintaining both sealing reliability and structural stability under high loads.
3Reliability
If sealing elements are used in expandable liner hangers, then sealing capacity is improved, but anchoring capacity is reduced under substantial axial loads
Solution Approach 1:
The fabric reinforcement embedded in the rubber sealing elements provides additional structural support and load-bearing capacity. This composite structure enables the sealing elements to simultaneously maintain sealing capacity and provide enhanced anchoring capacity by distributing axial loads through the fabric reinforcement, preventing failure under substantial loads.
Data Source
AI summary
The present disclosure relates generally to equipment utilized and operations performed in conjunction with a subterranean well and, more particularly, to an improved liner hanger system. A downhole expandable liner hanger positioned in a subterranean wellbore may comprise a liner. The downhole expandable liner hanger may further comprise an expansion element. The expansion element may comprise one or more annular seals bonded to the expansion element, a first spike; and a second spike. The downhole expandable liner hanger may further comprise a woven mesh, wherein the woven mesh is disposed around the expansion element between the first spike and the second spike, wherein the woven mesh comprises a first material layer and a second material layer.