Screen System With Filter Material Over Coupling Assembly
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Solution Overview
Problem
Conventional filtering systems in oil & gas wells have discontinuities in filtration surface area due to gaps between screen subs, limiting infiltration efficiency.
Innovation Solution
The implementation of a screen system with a section of filter material extending between screen subs, forming an annular flow path over a pipe coupling assembly, which maximizes filtration surface area and enables dehydration of gravel slurry across blank sections through perforations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional screen subs are positioned adjacent to one another, then the assembly is easy to manufacture and install, but discontinuities form in the filtration surface area reducing infiltration efficiency
Solution Approach 1:
The filter material extends continuously between screen subs and over coupling assemblies, eliminating gaps and discontinuities in the filtration surface. This continuous filter material ensures uninterrupted filtration action across the entire assembly, maximizing infiltration efficiency without sacrificing manufacturing ease.
Solution Approach 2:
The invention merges the filter material with the coupling assembly by extending the filter material over the coupling assembly. This integration creates a unified continuous filtration surface that combines the functions of multiple screen subs and their connections, eliminating the harmful discontinuities between adjacent screen subs.
2Area of stationary object
If filter material extends over pipe coupling assembly, then filtration surface area is maximized, but device complexity increases
Solution Approach 1:
The coupling assembly serves multiple functions: it connects screen subs mechanically and simultaneously supports the filter material extension. This multi-functionality allows the system to achieve continuous filtration surface area without proportionally increasing complexity, as the same structural element performs both connection and filtration support roles.
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 configuration enhances infiltration efficiency by minimizing gaps in filtration surface area and facilitating fluid exchange between the well and reservoir, improving overall filtration performance.
Implementation Method 1
a filtering mechanism or 'screens' positioned along the tubular string... a section of filter material extending between the first and second screen sections
Implementation Method 2
forming an annular flow path from the first screen section to the second screen section over the pipe coupling assembly... enabling dehydration of gravel slurry pumped across the blank section and contribution to and from the reservoir
Data Source
AI summary
A screen system having a first screen sub including a first base pipe wrapped with a first screen section; a second screen sub including a second base pipe wrapped with a second screen section; and a pipe coupling assembly joining the first and second base pipes. A section of filter material extends between the first and second screen sections, and extends over the pipe coupling assembly, thereby forming an annular flow path from the first screen section to the second screen section over the pipe coupling assembly.