Helical Groove Flow Control for Fluid Discrimination
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Solution Overview
Problem
Current autonomous inflow control devices in hydrocarbon production wells are not optimized to maximize production efficiency while minimizing the production of undesired fluids like water and gas, often requiring costly designs and failing to effectively differentiate between fluid types based on viscosity and density.
Innovation Solution
The development of autonomous inflow control devices with a flow chamber and helical grooves that impart rotational motion to fluids, causing undesired fluids (more dense or less viscous) to follow a longer pathway, thereby slowing their progress and allowing desired fluids (more viscous) to pass through more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional gatekeeper devices or simple flow restrictors are used, then device complexity is reduced, but the ability to discriminate between desired and undesired fluids is insufficient
Solution Approach 1:
The patent employs helical (curved) grooves instead of straight paths to create rotational motion in the fluid. This curvature causes denser undesired fluids to follow the longer helical path while less dense desired fluids cut through the center, achieving fluid discrimination through geometric curvature rather than complex mechanical components.
Solution Approach 2:
The flow chamber is segmented into distinct flow paths: a central region for desired fluids and helical groove regions for undesired fluids. This segmentation allows different fluid types to follow different trajectories based on their physical properties, enabling discrimination without complex control systems.
2Productivity
If autonomous inflow control devices are designed to maximize production efficiency, then productivity is improved, but device complexity and cost increase
Solution Approach 1:
The device uses the natural physical properties of the fluids (density and viscosity differences) to automatically separate and direct them through different paths. No external control systems, sensors, or actuators are needed - the fluid composition itself drives the separation process, making the device autonomous and cost-effective.
Solution Approach 2:
The invention exploits changes in fluid parameters (density and viscosity) to control flow behavior. By designing the flow chamber to respond to these parameter variations, the device automatically adjusts its flow distribution based on the actual fluid composition, maximizing production efficiency under varying conditions.
3Productivity
If undesired fluids are allowed to pass through quickly, then fluid flow rate is maintained, but water and gas production increase
Solution Approach 1:
The helical grooves create a longer, curved path for undesired fluids, effectively slowing their axial progress through the flow chamber. This curved trajectory increases the residence time of undesired fluids and reduces their breakthrough rate, while desired fluids continue to flow efficiently through the central region.
Solution Approach 2:
The invention adds a rotational dimension to the flow path using helical grooves. This transforms the simple axial flow into a combination of axial and rotational components, creating a longer effective path length for undesired fluids without increasing the axial length of the device, thereby slowing their progress while maintaining compact design.
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
This design enhances production efficiency by delaying the breakthrough of undesired fluids, reducing water and gas production, and maximizing the recovery of desired fluids like oil, while maintaining a cost-effective and reliable operation without moving parts.
Implementation Method 1
the at least one helical groove being configured to impart rotational motion to the fluid composition and thereby force at least some of the undesired fluid into the at least one helical groove, thereby slowing its progress along the axial length of the flow chamber
Data Source
AI summary
An example flow control device includes a body having an inlet and an outlet and a flow chamber extending therebetween. The flow chamber is configured to convey a fluid composition comprising a desired and an undesired fluid from the inlet to the outlet. A nozzle is arranged at the outlet and in fluid communication with the flow chamber, and at least one helical groove is defined along at least a portion of an axial length of the flow chamber. The at least one helical groove is configured to impart rotational motion to the fluid composition and thereby force at least some of the undesired fluid into the at least one helical groove and slow a progress of the undesired fluid along the axial length of the flow chamber.