Rupture Disk Stress Riser Fragmentation Control
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Solution Overview
Problem
Rupture disks used in resource recovery and carbon dioxide sequestration often suffer from fragmentation that results in large fragments interfering with wellbore operations, which is undesirable.
Innovation Solution
A burst disk design featuring a body with a stress riser unexposed to the fluidic environment, utilizing various geometries and materials such as ceramic, with stress risers like hollows, differing materials, or conductive materials to control fracture patterns and fragment size, allowing for controlled fragmentation that does not interfere with well operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rupture disks are used for resource recovery and carbon dioxide sequestration, then they work well for their intended purposes, but they produce large fragments that interfere with wellbore operations
Solution Approach 1:
The rupture disk is designed with multiple stress risers that segment the disk into multiple small fragments upon rupture, preventing the formation of large interfering pieces. The stress risers are strategically positioned to ensure controlled fragmentation into manageable sizes suitable for wellbore operations.
Solution Approach 2:
The patent introduces localized stress concentration features (stress risers) at specific locations within the rupture disk body. These localized modifications create predetermined fracture paths that control the fragmentation pattern, ensuring that the disk breaks into small non-interfering fragments while maintaining overall structural integrity during service.
2Manufacturing precision
If stress risers are exposed to fluidic environment, then they can control fracture patterns, but they may cause uncontrolled fragmentation
Solution Approach 1:
The stress risers are pre-formed within the rupture disk body during manufacturing, creating predetermined weak points that will fracture first under pressure. This preliminary structuring ensures that when the disk ruptures, it follows controlled paths through the stress risers, producing consistent fragment sizes without uncontrolled fragmentation.
Solution Approach 2:
The stress risers act as intermediary elements within the disk body that mediate the fracture process. By positioning these stress concentration features inside the body rather than on the surface, they control the fracture propagation internally, ensuring predictable fragmentation patterns while protecting the fracture control mechanism from fluidic environment degradation.
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 effectively manages fragment size and shape to prevent interference with wellbore operations, ensuring safe and efficient rupture without causing operational disruptions.
Implementation Method 1
a stress riser unexposed to fluidic environment outside of the body
Data Source
AI summary
A burst disk including a body, and a stress riser unexposed to fluidic environment outside of the body.