Density-Based Flow Control With a Rotating Float Valve
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Solution Overview
Problem
Well operators face challenges in controlling the ratio of oil, water, and gas production from a wellbore, as existing technologies are inefficient in selectively managing fluid components based on density, leading to impracticalities in fluid flow control.
Innovation Solution
A density-based fluid flow control device that includes a rotatable component with a float mechanism, which toggles between open and closed positions based on fluid density, allowing lower-density fluids like oil or gas to flow while preventing higher-density fluids like water from exiting, using centrifugal force to overcome gravitational effects and ensure orientation insensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional fluid flow control device is used, then fluid flow can be controlled, but it cannot selectively control different fluid components (oil, water, gas) based on their density differences
Solution Approach 1:
The patent utilizes density as a key parameter to differentiate and control various fluid components. By designing the float mechanism with specific density characteristics, the device automatically responds to changes in fluid density, enabling selective control of oil, water, and gas without complex external control systems
Solution Approach 2:
The float mechanism automatically adjusts the valve position based on the density of the incoming fluid mixture. The system self-regulates by using the buoyancy force generated by density differences to open or close the valve, eliminating the need for external sensors, actuators, or control systems
2Ease of operation
If gravity-based float control is used, then simple density-based control is achieved, but the device becomes sensitive to orientation and installation position
Solution Approach 1:
The patent introduces a centrifugal force generation mechanism that creates an artificial 'anti-gravity' effect. By rotating the float mechanism, centrifugal force counteracts the limitations of gravity-based control, enabling the device to function reliably in various orientations and eliminating installation position constraints
Solution Approach 2:
The patent transitions from a static gravity-based float control to a dynamic centrifugal force-based control. The float mechanism is designed to rotate, converting the static buoyancy effect into a dynamic centrifugal effect that maintains control reliability regardless of device orientation
3Productivity
If density-based control is implemented, then selective production of oil over water and gas is achieved, but the device complexity increases
Solution Approach 1:
The patent designs a universal float-valve mechanism that handles multiple fluid components (oil, water, gas) through a single integrated system. The same basic mechanism responds to density variations across different fluid compositions, providing multi-functional control without requiring separate control systems for each fluid type
Solution Approach 2:
The patent extracts and utilizes the natural density difference property of different fluid components as the controlling mechanism. By taking out and amplifying this natural property through the float mechanism, the system achieves selective fluid control without adding complex external control devices
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 effectively controls fluid flow by directing lower-density fluids through a direct pathway, reducing gas and water production while enhancing the reliability and versatility of fluid management in various well settings.
Implementation Method 1
a float component positioned within the rotatable component and movable between (i) an open position that enables fluid flow from the inlet port to an outlet port, and (ii) a closed position that restricts fluid flow from the inlet port to the outlet port
Implementation Method 2
The float component can move to the closed position when a higher-density fluid, such as water, flows through the fluid flow control device at least in part due to a force that is applied to the float component as the rotatable component rotates
Data Source
AI summary
A fluid flow control device can include an inlet port and an outlet port. The fluid flow control device can also include a rotatable component for rotating about an axis in response to fluid flow from the inlet port. A float component positioned within the rotatable component can move between (i) an open position that enables fluid flow from the inlet port to the outlet port, and (ii) a closed position that restricts fluid flow from the inlet port to the outlet port. The float component can move from the open position to the closed position in response to a fluid from the inlet port having one density. The float component can move from the closed position to the open position in response to the fluid from the inlet port having another density.