Deflection-Surface Actuation for Autonomous Well Fluid Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for differentiating fluid types in wellbore production, such as using density devices with floats or centrifugal rotation, face challenges like sensitivity issues, complexity, durability problems, and increased costs, especially when hydrocarbon and water densities are similar.
Innovation Solution
An autonomous inflow control device with a deflection surface that deflects fluid streams based on predetermined fluid properties, using an actuation device to open or close outlets based on fluid composition, allowing hydrocarbons to flow while restricting water influx.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a float is used in a density device to detect fluid types, then fluid differentiation is achieved, but the device becomes sensitive to tool inclination and gravity orientation, requiring precise positioning or custom design for each application
Solution Approach 1:
The patent replaces the traditional float-based mechanical density device with a centrifugal separation system. Instead of relying on gravitational buoyancy that requires precise orientation, the system uses centrifugal force generated by rotation to separate fluids based on density. This substitution eliminates the need for precise tool inclination alignment while maintaining fluid differentiation capability.
Solution Approach 2:
The patent introduces rotational motion to create centrifugal forces that dynamically separate fluid components. The rotation mechanism generates continuous centrifugal separation without requiring the tool to be precisely oriented, transforming a static gravity-dependent system into a dynamic centrifugal system that operates independently of tool inclination.
2Measurement precision
If a float is used to detect fluid types, then fluid differentiation is achieved, but the sensitivity becomes difficult when hydrocarbon and water densities are almost identical
Solution Approach 1:
The patent employs centrifugal rotation to amplify the separation effect between fluids with similar densities. By introducing rotational motion, the system creates centrifugal forces that enhance the density-based separation mechanism, making it more sensitive to small density differences compared to static float-based methods. This allows reliable differentiation even when hydrocarbon and water densities are nearly identical.
3Measurement precision
If a centrifugal rotation mechanism is added to enhance fluid differentiation, then detection sensitivity improves, but the device complexity and cost increase with continuous operation requirements
Solution Approach 1:
The patent designs the centrifugal separation system to utilize the natural flow energy and pressure differential to drive the rotation and separation process. The system self-regulates by using the fluid's own properties and the existing pressure gradient to maintain continuous separation without requiring external power sources or complex control mechanisms, thereby reducing overall device complexity.
4Ease of operation
If a choke valve is used to control flow rates, then pressure drop adjustment is achieved, but water influx remains considerable and accurate orifice sizing becomes difficult as fluid properties become similar
Solution Approach 1:
The patent replaces the choke valve's pressure-based flow control with a centrifugal separation system that directly differentiates fluid types based on density. Instead of relying on precise orifice sizing and pressure differential adjustment, the system uses rotational centrifugal forces to automatically separate and control the influx of water versus hydrocarbons, eliminating the need for complex choke valve calibration and providing more reliable fluid differentiation.
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 device efficiently differentiates fluid types, reducing operational costs and complexity, maintaining hydrocarbon volume, and minimizing water influx without requiring external power or frequent human intervention.
Implementation Method 1
deflecting the fluid stream off a deflection surface in a cavity of the autonomous inflow control device based on a predetermined fluid property range
Data Source
AI summary
An autonomous inflow control device includes a body defining a cavity. An inlet is in fluid communication with the cavity. The inlet receives well fluids. A deflection surface within the cavity deflects the well fluids at an angle based on a predetermined fluid property range of the well fluids. An influx outlet is in fluid communication with the cavity. An actuation device is disposed in the cavity and based on the angle the well fluids deflect off the deflection surface, the actuation device moves between an open position and a closed position. In the closed position, the actuation device covers the influx outlet. In the open position, the actuation device exposes the influx outlet to direct a volume of water from the well fluids out of the cavity. An outlet is in fluid communication with the cavity to direct the well fluids out of the cavity.