Downhole Flow Controller With Shrouded Screen for Cement Protection
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Solution Overview
Problem
Existing systems for producing hydrocarbon materials from subterranean formations do not naturally shroud the screen during installation, leading to exposure to cement and potential inoperability, as well as issues with trapped materials affecting sleeve displacement and production processes.
Innovation Solution
A flow control apparatus that includes a housing with a fluid passage and a flow communicator, featuring a filter medium and a shroud-defining counterpart that shields the filter medium from debris and cement during installation, ensuring its integrity and facilitating smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the screen is exposed during cementing operation, then the cementing process can proceed, but the screen may be rendered inoperable by cement exposure
Solution Approach 1:
The shroud is positioned over the screen before the cementing operation begins, providing preemptive protection. The shroud acts as a preliminary barrier that is already in place when cement is introduced, preventing cement from contacting the screen during the cementing process.
Solution Approach 2:
The shroud serves as an intermediary element between the screen and the cement. Instead of allowing direct contact between the screen and cement, the shroud intervenes as a protective intermediary that blocks cement from reaching the screen while still allowing the cementing operation to proceed.
2Reliability
If additional screen protection is added, then the screen is protected from cement, but the device complexity increases
Solution Approach 1:
The shroud is integrated with the existing screen assembly rather than being a separate, independent component. The shroud and screen are combined into a single unified structure that moves together as one assembly, reducing the number of separate parts and simplifying the overall system.
Solution Approach 2:
The shroud serves multiple functions: it protects the screen from cement during installation, maintains screen position during operation, and can be manipulated along with the screen. This multi-functionality reduces the need for additional specialized components.
3Reliability
If materials are trapped in the screen, then the screen can filter materials, but the sleeve displacement becomes difficult
Solution Approach 1:
The screen and shroud are designed as separable components that can be independently manipulated. The shroud can be displaced separately from the screen, allowing the screen to remain in place and maintain its filtering function while the shroud moves to facilitate sleeve displacement operations.
Solution Approach 2:
The coupling between the shroud and screen is designed to be dynamic rather than rigid. The shroud can be selectively coupled to or decoupled from the screen, allowing it to move independently when needed for sleeve displacement while providing protection when coupled to the screen.
Data Source
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AI summary
A flow control apparatus for producing hydrocarbon material from a subterranean formation is disclosed. The apparatus includes a housing that defines a housing passage, and a flow communicator that extends through the housing for effecting fluid communication between the housing passage and the subterranean formation. The apparatus includes a flow controller within the housing for modulating flow communication between the housing passage and the subterranean formation via the flow communicator. The flow controller includes a filter medium-defining counterpart and a shroud-defining counterpart, and the filter medium-defining counterpart has a filter medium. The flow controller is configurable for disposition relative to the flow communicator to open, close, or screen the flow communicator. While the filter medium and the flow communicator are not aligned, the housing and shroud-defining counterpart shields the filter medium from the housing passage and the external environment.