Composite Joint Fusing for Downhole Liner Hangers
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Solution Overview
Problem
Current liner hanger systems face challenges in maintaining contact integrity in downhole environments, particularly in high pressure-high temperature and corrosive conditions, leading to reliability issues and safety concerns, and require complex designs with high load capabilities.
Innovation Solution
A composite joint system using a surface energy source to fuse a composite material between the liner and casing, forming a strong bond with a shear strength of at least 2 ksi, eliminating the need for conventional setting tools and providing a simplified design for high loading capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liner hanger systems are used in downhole environments, then mechanical connection and hanging function is achieved, but reliability deteriorates under high pressure-high temperature and corrosive conditions
Solution Approach 1:
The patent replaces conventional mechanical liner hanger systems with a composite joint system that uses chemical bonding through fusion. The composite material is fused to both the liner and casing, creating a chemical bond rather than relying on mechanical connection. This substitution eliminates the reliability issues associated with mechanical components under HPHT and corrosive conditions.
Solution Approach 2:
The patent employs a composite joint made of composite material that is fused to both the liner and casing. This composite material provides both structural strength and resistance to HPHT and corrosive environments, combining properties that neither conventional mechanical components nor single materials could achieve alone.
2Strength
If complex liner hanger designs are used to achieve high load capabilities, then load bearing capacity is improved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the complex mechanical components (slips, setting tools, packers) from conventional liner hanger designs. By removing these unnecessary mechanical elements and replacing them with a simple composite joint system, the design achieves high load capability through the fused composite material without the complexity of traditional mechanical systems.
Solution Approach 2:
The patent changes the fundamental bonding mechanism from mechanical interlocking to chemical fusion. This parameter change in the joining method allows the composite joint to achieve high strength and load capability through the fusion process, eliminating the need for complex mechanical design elements.
3Reliability
If material sealing components are used in liner-top packers, then sealing function is achieved, but reliability deteriorates when temperature approaches 600° F due to material decomposition
Solution Approach 1:
The patent replaces conventional material-based sealing components in liner-top packers with a fused composite joint system. This substitution eliminates the decomposition issue that occurs when sealing materials are exposed to temperatures approaching 600° F, as the composite fusion creates a thermal and chemical bond that remains stable at high temperatures.
4Ease of operation
If conventional setting tools are used to install liner hangers, then installation function is achieved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the requirement for conventional setting tools from the liner hanger installation process. The composite joint system is designed to be installed and fused without the need for complex mechanical setting tools, reducing both device complexity and installation cost while maintaining installation capability.
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 composite joint system enhances reliability and safety by forming a strong, high-load capable bond between the liner and casing, reducing costs and operational risks in hostile downhole environments, while maintaining the functionality of traditional hanger joints.
Implementation Method 1
A composite joint is arranged on an outer surface of the first structure. The composite joint is formed of a material configured to be fused to both the first structure and the second structure and form a hanger joint having a shear strength of at least 2 ksi when the material is fused to the outer surface of the first structure and an inner surface of the second structure.
Data Source
AI summary
Downhole hanger systems and methods for hanging a first structure from a second structure in downhole environments are described. The systems include a first structure and a second structure, with the first structure disposed within the second structure. A composite joint is arranged on an outer surface of the first structure. The composite joint is formed of a material configured to be fused to both the first structure and the second structure and form a hanger joint having a shear strength of at least 2 ksi when the material is fused to the outer surface of the first structure and an inner surface of the second structure.