Conical Swirl Chamber Inflow Control Device for Clogging Prevention
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Solution Overview
Problem
Current inflow control devices (ICDs) in hydrocarbon wells are prone to clogging and require maintenance, leading to inconsistent fluid production and reduced recoverable reserves, as they struggle to maintain even flow rates across the wellbore due to irregular formation properties and fluid layer boundaries.
Innovation Solution
A passive ICD design featuring conical segments with a swirl chamber and angled surfaces to create a controlled pressure drop, reducing the risk of clogging and maintaining consistent production by using a swirl chamber to equalize pressure along the wellbore, comprising an inner and outer conical cylinder with a swirl chamber between them, and a base plate for fluid communication between segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If passive ICDs are used to control fluid flow into the wellbore, then production profile is improved, but the device is susceptible to plugging or clogging with no remediation options
Solution Approach 1:
The device incorporates movable components including a piston that can move in response to pressure changes, and a spring that can compress and expand. This dynamic mechanism allows the device to adapt to changing flow conditions and prevents permanent plugging by enabling the passage to open up when blocked
Solution Approach 2:
The device changes the flow parameters by creating a controlled pressure drop through the conical geometry and movable piston. The pressure differential drives the piston movement, which in turn adjusts the flow area dynamically, providing both flow control and plugging prevention
2Ease of operation
If active flow control devices are used, then flow control capability is improved, but cost and complexity increase due to moving parts requiring maintenance
Solution Approach 1:
The device uses the flow itself to operate the control mechanism. The pressure differential created by the flow drives the piston movement, which automatically adjusts the flow control without requiring external power, control systems, or maintenance. The spring provides the restoring force, making the entire system self-regulating
Solution Approach 2:
The invention replaces complex active mechanical control systems with a simple passive mechanical mechanism driven by the flow itself. Instead of using motors, sensors, and control electronics, the device uses purely mechanical elements (conical geometry, piston, spring) that respond automatically to pressure changes
3Stability of the object's composition
If ICDs create pressure drop to restrict flow, then production evenness is improved, but the device becomes more susceptible to clogging
Solution Approach 1:
The pressure drop mechanism is dynamic rather than static. The piston can move to adjust the flow area based on the pressure differential, preventing the buildup of debris that would cause clogging in fixed-geometry devices. The movable component allows the device to maintain pressure control while adapting to varying flow conditions
Solution Approach 2:
The device changes the pressure parameter dynamically through piston movement. By adjusting the flow area in response to pressure changes, the device maintains effective pressure control for even production while preventing the conditions that lead to clogging
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 solution provides a cost-effective, reliable, and low-maintenance method to achieve homogeneous production across a horizontal well section by maintaining a uniform oil-water contact front, reducing the risk of clogging and ensuring consistent fluid flow, thereby enhancing recoverable reserves and completion longevity.
Implementation Method 1
swirling fluids to maintain a wellbore at a desired pressure
Implementation Method 2
generate a designated pressure drop small enough to achieve pressure equalization within the wellbore
Data Source
Figure 1
Figure 2a~2c
AI summary
An apparatus for controlling fluid pressure, useful in the production of hydrocarbons from underground reservoirs comprises at least one conical segment. A conical segment comprises: an inner conical cylinder with a central axis; an outer conical cylinder, outside of, and coaxial with, the inner conical cylinder; and a swirl chamber disposed between a conical outer surface of the inner conical cylinder and a conical inner surface of the outer conical cylinder. There is a fluid entrance through a wall of the outer conical cylinder of at least one conical segment at an upstream end of the apparatus for directing fluids into such conical segment's swirl chamber. There is also a fluid exit through a wall of the inner conical cylinder of at least one conical segment at a downstream end of the apparatus for directing fluids out of such conical segment's swirl chamber.