Multi-position sleeve assembly for wellbore flow metering
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Solution Overview
Problem
Existing sleeve assemblies for wellbore completion operations lack the ability to restrict or meter fluid flow effectively between the housing bore and the surrounding formation, and are not optimally suited for manipulation using downhole actuator tools.
Innovation Solution
A multi-position sleeve assembly is designed with a tubular housing defining first and second ports, where the second ports are configured for restricted fluid flow. The assembly includes first and second sliding sleeves that can be actuated between closed and open positions to control fluid flow through the ports, with the second sliding sleeve positioned downhole relative to the first.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing sleeve assemblies use standard port configurations, then fluid flow is uncontrolled, but the ability to restrict or meter flow is lost
Solution Approach 1:
The sleeve assembly is divided into multiple independent sliding sleeves (first sliding sleeve, second sliding sleeve) that can be actuated separately. Each sleeve controls specific ports (first ports, second ports) with different flow characteristics. This segmentation allows independent control of flow paths, enabling both unrestricted flow through first ports and restricted/metered flow through second ports, thereby achieving flow control capability without requiring a complete redesign of the entire assembly.
Solution Approach 2:
Different ports are designed with different flow characteristics - first ports allow unrestricted flow while second ports are configured for restricted or metered flow. The sliding sleeves can be positioned to selectively open or close specific ports based on local flow control requirements. This local differentiation of port qualities enables versatile flow control (unrestricted, restricted, metered) while maintaining a relatively simple overall structure that leverages existing sleeve assembly configurations.
2Adaptability or versatility
If multiple sliding sleeves are added to control flow, then flow restriction capability is improved, but device complexity increases
Solution Approach 1:
The sliding sleeves are designed with multi-functionality to reduce overall complexity. Each sliding sleeve can control multiple ports or provide multiple flow control modes (open, closed, partially open) depending on its position. The first sliding sleeve controls first ports for unrestricted flow, while the second sliding sleeve controls second ports for restricted/metered flow. This universal design allows a single sleeve structure to perform multiple functions (flow on/off control and flow metering) rather than requiring separate specialized components for each function.
Solution Approach 2:
The sleeve assembly employs a nested configuration where sliding sleeves are positioned within the housing in a compact arrangement. The first sliding sleeve and second sliding sleeve are nested within the same housing structure, with each sleeve operating in its own axial position range. This nesting allows multiple flow control elements to be integrated into a single compact assembly, reducing the overall device complexity and footprint compared to having separate independent control mechanisms.
3Adaptability or versatility
If second ports are configured for restricted flow, then flow metering is achieved, but productivity is reduced
Solution Approach 1:
The sleeve assembly provides dynamic flow control by allowing the sliding sleeves to be actuated to different positions during wellbore operations. The first sliding sleeve can be moved to open or close first ports for unrestricted high-flow treatment. The second sliding sleeve can be moved to open or close second ports for restricted low-flow treatment. This dynamic adjustability enables the system to switch between high productivity mode (unrestricted flow through first ports) and controlled treatment mode (restricted flow through second ports), allowing operators to optimize productivity based on real-time treatment requirements rather than being locked into a fixed flow rate.
Data Source
AI summary
A multi-position sleeve assembly for use in a wellbore, comprising a tubular housing defining an axial bore, a first sliding sleeve, and a second sliding sleeve. The housing has an inner and outer surface defining therebetween one or more first ports and one or more second ports spaced axially from the one or more first ports. The one or more second ports are configured for restricted fluid flow relative to the one or more first ports. The first and second sliding sleeves are located in the bore and coaxial to the housing and are actuable relative to the housing between a closed sleeve position, wherein the one or more first ports and the one or more second ports are obstructed, and an open sleeve position wherein, one or both of the one or more first ports and the one or more second ports are not obstructed.