Adaptive Fluid Switch for Autonomous Flow Control
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Solution Overview
Problem
Current autonomous inflow control devices for hydrocarbon-bearing subterranean wells face limitations such as fatigue failure, intricate component failures, and lack of sensitivity to minor fluid property changes, necessitating a downhole fluid flow control system that can adapt to changing fluid compositions without intervention and without relying on biasing devices or complex structures.
Innovation Solution
An adaptive fluid switch with a self-impinging valve element that interprets fluid viscosity to select between low and high resistance flow paths, allowing for autonomous transition between high and low flowrate regimes based on predetermined viscosity levels, effectively distinguishing between selected and non-selected fluids like oil, natural gas, and water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autonomous inflow control devices with valve elements are used to respond to changing fluid properties, then the ability to control production fluid flowrate is improved, but the device suffers from fatigue failure of biasing devices and failure of intricate components
Solution Approach 1:
The patent removes biasing devices and intricate valve components from the system, replacing them with a passive flow control structure that uses the fluid's own properties (viscosity, density, velocity) to automatically regulate flow. This extraction of problematic components eliminates fatigue failure while maintaining adaptability to fluid property changes.
Solution Approach 2:
The flow control device operates autonomously using the kinetic energy and physical properties of the production fluid itself to control flow. The device self-regulates based on fluid characteristics without requiring external biasing mechanisms, power sources, or complex actuating components that could fail.
2Ease of operation
If autonomous inflow control devices with complex structures are used to control fluid flow, then the ability to regulate production is improved, but the device complexity increases leading to more points of failure
Solution Approach 1:
The flow control device is divided into distinct functional zones: an impingement zone where fluid streams collide to create backpressure, a mixing zone where fluids combine, and a control zone where flow regulation occurs. This segmentation allows each zone to perform its specific function with simple geometry, avoiding the need for a single complex moving-part mechanism.
Solution Approach 2:
The patent replaces traditional mechanical valve systems with moving parts and springs with a stationary flow management system that uses fluid dynamics (impingement, mixing, and pressure differential) to achieve flow control. This substitution eliminates mechanical wear and complexity while maintaining autonomous operation.
3Device complexity
If traditional inflow control devices are used, then the structure is simple, but the device lacks sensitivity to minor fluid property differences
Solution Approach 1:
The device exploits changes in fluid parameters (viscosity, density, velocity) to dynamically regulate flow. As fluid properties change, the impingement zone creates varying backpressure that automatically adjusts the flowrate, providing sensitivity to minor property differences without complex sensing mechanisms.
Solution Approach 2:
The flow control device is designed to be dynamically responsive to fluid property changes. The impingement and mixing zones create a flow regime that naturally adapts to variations in fluid characteristics, providing continuous automatic adjustment based on real-time fluid conditions.
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 adaptive fluid switch efficiently regulates production rates by maximizing the flow of desired fluids and minimizing undesired fluids, maintaining high flowrates when viscosity is high and low flowrates when viscosity is low, thereby optimizing production without the need for well intervention or complex components.
Implementation Method 1
the fluid control valve is configured to interpret the viscosity of the fluid and determine whether the fluid is a selected fluid, such as oil, or a non-selected fluid, such as natural gas or water
Implementation Method 2
The valve element has a viscosity dominated flow path configured to provide a first flow resistance and an inertia dominated flow path configured to provide a second flow resistance
Data Source
AI summary
An adaptive fluid switch for regulating the production rate of a fluid. The adaptive fluid switch includes a fluid control valve having a fluid selector, a swirl chamber and a self-impinging valve element. When the fluid produced through the adaptive fluid switch has a viscosity greater than a first predetermined level, the fluid selector determines the fluid to be a selected fluid such that the fluid swirls in one direction in the swirl chamber and follows a low resistance flow path in the valve element. When the fluid has a viscosity less than a second predetermined level, the fluid selector determines the fluid to be a non-selected fluid such that the fluid swirls in the opposite direction in the swirl chamber and follows a high resistance flow path in the valve element, thereby regulating the production rate of the fluid responsive to changes in the viscosity of the fluid.