Wellbore Screen Assembly with Relief Valve for Plugged Primary Filter
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Solution Overview
Problem
Sand control screen assemblies in wellbore operations often become plugged with particulates, leading to reduced or halted hydrocarbon production, requiring costly cleaning processes and significant downtime, as existing solutions do not effectively manage sudden influxes of unconsolidated formation particles during production.
Innovation Solution
A sand control screen assembly with a primary and secondary screen configuration, where a relief valve diverts fluid flow from the primary screen to the secondary screen when a predetermined pressure threshold is reached, ensuring continuous production and promoting self-cleaning of the primary screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single screen assembly is used to control formation particles, then sand control is achieved, but the screen becomes plugged with particulates leading to reduced production
Solution Approach 1:
The screen assembly is segmented into a primary screen and a secondary screen that operate independently. The primary screen handles normal sand control while the secondary screen remains dormant until needed. This segmentation allows the system to maintain sand control reliability while preventing production loss when one screen becomes plugged.
Solution Approach 2:
The system changes the flow path parameter dynamically. During normal operation, fluid flows through the primary screen. When the primary screen becomes plugged (detected via pressure differential), the system switches the flow parameter to route fluid through the secondary screen instead, maintaining productivity without compromising sand control.
2Productivity
If the primary screen is cleaned to remove filter cake, then production is restored, but costly cleaning processes and significant downtime are required
Solution Approach 1:
The secondary screen acts as an intermediary backup system. Instead of cleaning the primary screen to restore production, the system switches flow to the secondary screen which remains clean and unused until needed. This eliminates the need for costly cleaning operations and significant downtime.
Solution Approach 2:
The secondary screen is prepared in advance as a standby unit during installation. It remains pre-positioned and ready to immediately take over when the primary screen becomes plugged, eliminating the need for reactive cleaning operations and associated downtime.
3Productivity
If a dual screen configuration with relief valve is used, then continuous production is maintained, but device complexity increases
Solution Approach 1:
The relief valve provides dynamic switching capability between the primary and secondary screens based on real-time pressure differential conditions. This dynamic element allows the system to maintain continuous production by automatically routing flow through the appropriate screen without requiring complex control systems.
Solution Approach 2:
The relief valve serves multiple functions: it monitors pressure differential, controls flow switching between screens, and prevents excessive pressure buildup. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while maintaining continuous production 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
This configuration allows for uninterrupted fluid production by activating the secondary screen when the primary screen becomes plugged, reducing maintenance costs and downtime by providing a backup filtering system and promoting self-cleaning of the primary screen.
Implementation Method 1
a relief valve diverts fluid flow from the primary screen to the secondary screen when a predetermined pressure threshold is reached
Data Source
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AI summary
This invention relates to wellbore equipment utilized in conjunction with operations performed in subterranean wells and, in particular, sand control screen assemblies providing secondary flow capabilities. Once sand control screen assembly includes a base pipe having an exterior surface and defining one or more perforations therein, a screen jacket disposed about the exterior surface of the base pipe and having a primary screen axially adjacent a secondary screen, and at Ieast one relief valve configured to open upon experiencing a predetermined fluid pressure, wherein, once opened, the at Ieast one relief valve diverts fluid flow from the primary screen and provides the fluid flow to the secondary screen.