Pressure-Balanced Piston Flow Control Device for Actuator Power Reduction
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Solution Overview
Problem
Existing hydrocarbon production well technologies face challenges in effectively regulating the flow of formation fluids, particularly in preventing water and gas coning, minimizing unwanted fluid production, and maximizing desired fluid production, as they often require significant power and size for actuators and rely on dynamic seals that can fail.
Innovation Solution
The implementation of a sand control screen assembly with a pressure-balanced piston and magnetic coupling, which minimizes actuator power and size requirements, eliminates the need for dynamic seals, and includes sensors and a downhole power generator to monitor and control fluid flow, allowing for real-time regulation of fluid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional flow control devices are used, then fluid flow regulation is achieved, but significant actuator power and size are required
Solution Approach 1:
The patent employs a balanced piston assembly where hydraulic pressure acts on both sides of the piston to create counterbalancing forces. This counterweight mechanism reduces the net force required from the actuator, thereby reducing actuator power and size requirements while maintaining effective flow control capability.
Solution Approach 2:
The patent replaces traditional dynamic seal mechanisms with a magnetic coupling system. This substitution eliminates the need for complex mechanical sealing arrangements, reducing actuator complexity and power requirements while maintaining reliable flow regulation.
2Productivity
If conventional flow control devices are used, then fluid flow regulation is achieved, but dynamic seals are required which can fail
Solution Approach 1:
The patent replaces mechanical dynamic seals with a magnetic coupling system that transfers rotational motion and power without physical contact between moving parts. This eliminates wear and failure modes associated with dynamic seals, significantly improving reliability while maintaining flow control functionality.
Solution Approach 2:
The magnetic coupling acts as an intermediary between the actuator and the flow control mechanism, transferring energy and motion without requiring direct mechanical contact or dynamic seals. This intermediary approach eliminates the reliability issues associated with traditional sealing mechanisms.
3Productivity
If real-time fluid flow monitoring and control is implemented, then production optimization is achieved, but additional equipment and power consumption are required
Solution Approach 1:
The patent integrates multiple functions into a single unified system: the flow control device incorporates both sensing capabilities for real-time monitoring and actuation capabilities for flow regulation. This multi-functionality reduces the total quantity of separate equipment needed while enabling production optimization through real-time control.
Solution Approach 2:
The patent combines sensors, actuators, and flow control elements into an integrated assembly. By merging these components into a single unit, the system achieves real-time monitoring and control capabilities without requiring multiple separate devices, thereby minimizing equipment quantity while maximizing production optimization benefits.
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 solution reduces or prevents the production of undesired wellbore fluids, minimizes power consumption, and extends the lifespan of equipment by preventing water breakthrough, while maintaining efficient fluid regulation and production optimization.
Implementation Method 1
The pressure-balanced piston assembly operates to balance hydraulic forces within the flow control device
Implementation Method 2
the balanced piston assembly can be shifted based on a magnetic coupling, which eliminates the need for dynamic seals
Data Source
AI summary
A sand control screen assembly includes a base pipe and a flow control device positioned within a flow path for a fluid that extends between the exterior and the interior of the base pipe. The flow control device includes a housing defining an inlet that receives the fluid from the flow path and an outlet that discharges the fluid back into the flow path, and a piston chamber is defined in the housing to fluidly communicate the inlet with the outlet. A pressure-balanced piston is positioned within the piston chamber and movable between a first position, where fluid flow between the inlet and the outlet is prevented, and a second position, where fluid flow between the inlet and the outlet is facilitated. An actuator moves the pressure-balanced piston between the closed and open positions, and an electronics module is communicably coupled to the flow control device to operate the actuator.