Magnetic Inflow Valve Switching for Zoned Well Flow Control
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Solution Overview
Problem
Conventional inflow control devices in complex well structures, such as horizontal and multilateral wells, struggle with non-uniform inflow due to variations in reservoir pressure and the 'heel-toe' effect, leading to early gas and water breakthrough, which cannot be efficiently controlled via surface wellhead chokes.
Innovation Solution
An inflow control device with a gate that can reversibly switch between open and closed states using a combination of permanent magnets and electromagnets, controlled remotely by a mobile controller through electromagnetic pulses, allowing dynamic adjustment of fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional surface wellhead chokes are used to control inflow, then the control system is simple, but they cannot efficiently control non-uniform inflow in complex well structures
Solution Approach 1:
The well completion structure is divided into multiple zones using packers, and each zone is equipped with its own inflow control valve on the inside of a sandscreen or perforated liner. This segmentation allows independent control of each zone to address non-uniform inflow patterns in complex well structures.
Solution Approach 2:
Inflow control valves are introduced as intermediary devices located downhole within the well structure, acting as intermediaries between the reservoir and the production system. These valves enable precise control of fluid inflow at the source, overcoming the limitations of surface wellhead chokes.
2Adaptability or versatility
If passive ICDs with fixed geometry channels are used, then the device structure is simple, but they cannot adapt to dynamic changes in reservoir conditions
Solution Approach 1:
The inflow control device incorporates a gate that can move between open and closed states, transforming the static passive ICD into a dynamic system. This dynamic gate allows the device to adapt to changing reservoir conditions by adjusting or closing flow channels in response to real-time requirements.
Solution Approach 2:
The device enables parameter changes by allowing the gate to adjust the opening degree of flow channels. This changes the flow area and resistance dynamically, enabling adaptation to varying reservoir pressure conditions and fluid properties without requiring complex multi-component systems.
3Adaptability or versatility
If autonomous inflow control devices are used to self-adjust fluid flow, then adaptability improves, but the mechanism becomes more complex
Solution Approach 1:
The device replaces complex mechanical valve mechanisms with a simpler gate system actuated by magnetic fields. Electromagnets or permanent magnets provide the actuation force to move the gate, eliminating the need for complex mechanical linkages, springs, or diaphragms found in traditional autonomous control devices.
Solution Approach 2:
The magnetic actuation system changes the operational parameter from mechanical force to magnetic field force. This simplifies the overall mechanism while maintaining self-adjustment capability, as the magnetic field can be easily controlled and adjusted without mechanical complexity.
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
Enables precise and adaptive control of fluid inflow, reducing non-uniformity and preventing unwanted fluid breakthrough, enhancing production efficiency and control in complex well systems.
Implementation Method 1
the first valve seat and the second valve seat comprise one or more permanent magnets, or wherein the gate comprises one or more permanent magnets
Implementation Method 2
the one or more electromagnets, wherein a magnetic field generated by the one or more electromagnets has a first polarity controllable by an electric current in the electromagnets
Data Source
AI summary
An inflow control device for use in a well or pipeline, the inflow control device being configured to switch reversibly between an open state and a closed state, or between a closed state and an open state, the inflow control device including: a housing; a gate moveable within the housing between a closed state and an open state; the housing defining a first valve seat for receiving the gate in a closed state, and a second valve seat for receiving the gate in an open state, wherein the first valve seat and the second valve seat include one or more permanent magnets, or wherein the gate includes one or more permanent magnets.