Downhole Flow Device Sliding Sleeve Position Verification
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Solution Overview
Problem
Existing downhole flow devices face challenges in verifying the actual position of sliding sleeves without the need for subsequent logging tools, and multi-position valves are not reliably deployable without multiple tools.
Innovation Solution
A downhole flow device with a sliding sleeve that uses a retractable and compressible projecting part made of spring steel, which engages grooves to indicate position changes through increased power demand, allowing verification without additional tools, and a multi-position valve design with varying sized openings and grooves for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sliding sleeve is used to control fluid flow in downhole applications, then the flow can be controlled between open and closed positions, but it becomes difficult to verify the actual position of the sliding sleeve without running additional logging tools
Solution Approach 1:
The patent implements feedback by incorporating position detection means (magnetic sensors, Hall effect sensors, or RFID tags) that continuously monitor the sliding sleeve position and transmit this information to the surface. This allows real-time verification of valve position without requiring separate logging tools, directly resolving the verification difficulty while maintaining operational simplicity
Solution Approach 2:
The patent introduces an intermediary positioning indicator system consisting of magnetic markers or RFID tags attached to the sliding sleeve, which are detected by sensors in the manipulation tool. This intermediary mechanism enables indirect observation of the sliding sleeve position through detectable signals, eliminating the need for additional logging tools while providing reliable position verification
2Adaptability or versatility
If multi-position valves are deployed to enable varied flow control positions, then more precise fluid management is achieved, but multiple tools are required to shift multiple valves to varied positions
Solution Approach 1:
The patent applies universality by designing a single manipulation tool equipped with multiple detection means and actuation mechanisms that can identify and control multiple sliding sleeves at different positions. The tool can detect positions of first, second, and third sliding sleeves using the same sensor technology and manipulate each valve to desired positions (fully open, partially open, fully closed) using unified actuation procedures, eliminating the need for multiple specialized tools
Solution Approach 2:
The patent segments the control function by providing individual detection and actuation mechanisms for each sliding sleeve within the multi-position valve system. Each sliding sleeve has its own position detection means and can be independently manipulated, allowing precise control of multiple valves through a single integrated tool that handles each segment separately but systematically
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
Enables easy verification of the sliding sleeve's position using power demand analysis and provides reliable multi-position control without requiring additional tools, enhancing operational efficiency in well fluid management.
Implementation Method 1
the projecting part may be compressible... the projecting part may be made of spring steel
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present invention relates to a downhole flow device 1 for controlling a flow of fluid between an annulus and an inner bore of a well tubular metal structure arranged in a borehole. The downhole flow device comprises a tubular part 5 comprising a first opening 6 and an axial extension, and a sliding sleeve 7 configured to slide within the tubular part 5 between a first position covering the opening 6 and a second position fully uncovering the opening, the tubular part 5 comprising a first groove 8 and a second groove 11, the first groove 8 being arranged at a first distance from the second groove 11 along the axial extension, and the sliding sleeve 7 comprising a projecting part 10 configured to engage the first groove 8 in the first position and the second groove 11 in the second position, wherein the tubular part 5 comprises a third groove configured to be engaged by the projecting part 10 and having a second distance to the second groove 11 which is smaller than the first distance.