Expandable Foam Downhole Screen for Single-Trip Sand Control
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Solution Overview
Problem
Existing sand control mechanisms in the oil and gas industry often fail due to erosion and hot spots, leading to complex and costly remedial operations, and issues like bore collapse and wellbore debris interference are common.
Innovation Solution
A downhole expandable apparatus comprising a base pipe with a fluid-permeable expandable foam material and a retractable sleeve that expands to bridge defects and restrict solids ingress, allowing single-trip remediation and filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sand screens are used for sand control, then sand filtration is provided, but they fail due to erosion and hot spots requiring complex remedial operations
Solution Approach 1:
The sand screen is designed with expandable foam segments that can dynamically change from a compact configuration during installation to an expanded configuration after deployment. This dynamic transformation allows the screen to adapt to wellbore conditions and repair defects without requiring complex remedial operations, as the expandable nature enables in-situ repair capabilities.
Solution Approach 2:
The foam material undergoes parameter changes through expansion, transforming from a small installable form to a large operational form. This parameter change enables the screen to provide effective sand control while allowing for simplified remedial operations, as the expanded foam can bridge and seal defects in the wellbore without requiring complex intervention equipment.
2Reliability
If sand screens are deployed to prevent sand production, then sand control is achieved, but remedial action requires multiple trips into the well
Solution Approach 1:
The dynamic expandable design allows the sand screen to be installed in a compact form and then expanded in-situ to provide sand control. This eliminates the need for multiple trips, as the screen can be deployed once and then activated to provide both sand control and remedial capabilities through its expandable nature.
Solution Approach 2:
The expandable foam is prepared in a compact state for installation, and the expansion capability is pre-built into the structure. This preliminary preparation allows for single-trip installation and activation, as the screen expands after deployment to provide both sand control and defect bridging capabilities without requiring additional intervention trips.
3Productivity
If expandable foam material is used to bridge defects, then single-trip remediation is enabled, but the apparatus complexity increases
Solution Approach 1:
The use of porous expandable foam material provides a simple yet effective mechanism for bridging defects and providing sand control. The porous structure allows fluid flow while trapping solids, and the expansion capability enables single-trip remediation without requiring complex mechanical components or multiple intervention operations.
Solution Approach 2:
The apparatus combines base pipe material with expandable foam material to create a composite structure that provides both structural support and filtration/remediation functions. This composite design enables single-trip remediation while keeping the overall apparatus relatively simple, as the foam material provides multiple functions (bridging, filtration, sealing) without requiring separate complex components.
4Reliability
If the retractable sleeve is retracted to allow foam expansion, then filtration is provided, but the apparatus complexity increases
Solution Approach 1:
The retractable sleeve is designed to be extracted or removed after the foam expands into its filtration configuration. This extraction simplifies the overall apparatus, as the sleeve serves only as a temporary constraint during installation and deployment, and is then removed to allow the foam to provide filtration without the added complexity of the sleeve mechanism remaining in place.
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 apparatus provides effective filtration and prevents solid ingress while permitting fluid flow, offering cost-effective and efficient remediation of defects in wellbores without multiple trips, stabilizing subsurface formations, and enhancing production efficiency.
Implementation Method 1
The expansion may be, at least in part, by virtue of an elastic recovery effect of the foam material
Implementation Method 2
as a result of swelling of the foam material
Implementation Method 3
as a result of decompression of the foam material
Implementation Method 4
the foam material may permit the passage of fluids (e.g., oil, water, gas etc.) therethrough, while preventing or restricting the passage of solids, such as particulate material, for example sand
Data Source
AI summary
A downhole expandable apparatus for restricting ingress of solids in a wellbore comprises a base pipe, a fluid permeable expandable foam material mounted on the base pipe configurable between a non-expanded and an expanded configuration, and a retractable sleeve. The retractable sleeve is moveable between a first configuration in which the retractable sleeve retains the expandable foam material in the non-expanded configuration, and a second configuration in which the retractable sleeve is retracted to provide a free portion of the expandable foam material. The expandable foam material is permitted to radially expand towards the expanded configuration and into engagement with a surface in the wellbore.