Well Screen Mesh Overlap Sealing via Spine Compression
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Solution Overview
Problem
Well screen assemblies face challenges in preventing the ingress of particulates like sand and rock fragments into production tubing, which contaminates extracted fluids and damages equipment, requiring effective filtration methods to maintain fluid flow while protecting equipment from erosion and blockages.
Innovation Solution
A well screen assembly design featuring an elongate base pipe with a shroud layer and a mesh layer that overlaps to form a sealed area, where a spine compresses and secures the overlap against particulate passage, using a rib to align and compress the overlap, ensuring that particulates are blocked from entering the base pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mesh layer is used to filter particulates, then fluid flow is enabled, but particulates can still enter through overlap gaps
Solution Approach 1:
A sealing element (rib or spine) is introduced as an intermediary component between the mesh layer and the base pipe. This sealing element fills the gap created by the mesh layer overlap, preventing particulates from passing through while maintaining fluid flow capability. The sealing element acts as a mediator that resolves the contradiction between allowing fluid passage and blocking particulate ingress.
2Object-affected harmful factors
If the mesh layer overlap is compressed to seal gaps, then particulate passage is blocked, but the structure becomes more complex
Solution Approach 1:
The sealing function is merged with existing structural components of the well screen assembly. The rib or spine is integrated into the base pipe structure or the mesh layer assembly, combining the sealing function with structural support elements. This merging approach prevents particulate passage without significantly increasing overall structural complexity.
3Reliability
If a rib or spine is used to compress the mesh overlap, then sealing is improved, but manufacturing complexity increases
Solution Approach 1:
The rib or spine is pre-formed and pre-positioned on the base pipe before the mesh layer is installed. This preliminary action allows the sealing component to be manufactured separately using standard processes, then simply attached or integrated during assembly. This approach improves sealing reliability while minimizing the impact on manufacturing complexity by separating the sealing function into a distinct, pre-prepared component.
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
This design effectively seals particulates from entering the production tubing, simplifies the production process, and promotes axial flow paths for efficient fluid extraction, reducing equipment damage and maintenance costs by preventing erosion and blockages.
Implementation Method 1
A spine resides proximate substantially an entire length of the area of overlap and transmitting a force from the shroud layer to the mesh layer that compresses and seals the area of overlap against passage of particulate
Data Source
AI summary
A well screen assembly includes an elongate base pipe, a shroud layer about the base pipe, and a mesh layer between the shroud layer and the base pipe. A portion of the mesh layer overlaps another portion of the mesh layer to form an area of overlap. A spine is positioned proximate substantially an entire length of the area of overlap, and transmits a force from the shroud layer to the mesh layer that compresses and seals the area of overlap against passage of particulate.