Downhole Control and Sensing System for Well Zones
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Solution Overview
Problem
Existing oil and gas well systems face challenges in independently controlling multiple valves and efficiently powering and communicating with downhole sensors, requiring complex electrical and hydraulic systems that are difficult to manage and operate effectively.
Innovation Solution
An electrical system utilizing a hydraulic control system with piston devices and solenoid-operated valves (SOVs) coupled with an electrical control and sensing system featuring conductors, switching circuits, and sensors, allowing for independent control of valves and simultaneous power and data communication to downhole sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple solenoid-operated valves (SOVs) are used to independently control fluid flow from different zones, then zone isolation and flow control capability are improved, but system complexity and difficulty of management increase
Solution Approach 1:
The patent combines multiple SOVs and their control circuits into an integrated downhole assembly. The switching means integrates multiple switching circuits that can independently control each SOV, merging what would otherwise be separate control systems into a single coordinated unit that reduces overall system complexity while maintaining independent zone control capability
Solution Approach 2:
The control system is designed with universal switching means that can control multiple SOVs through a standardized interface. The switching circuits are configured to universally handle control signals for different zones, allowing the same control mechanism to manage multiple valves with independent on/off control for each zone
2Measurement precision
If downhole sensors are coupled to a cable for power and data communication, then sensing capability is improved, but cable complexity and installation difficulty increase
Solution Approach 1:
The patent combines power conductors and data communication conductors into a single integrated cable assembly. The cable includes both power lines for energizing sensors and communication lines for data transmission, merging separate power and data pathways into one unified cable structure that simplifies installation while maintaining full sensing and communication functionality
Solution Approach 2:
The cable is designed as a universal communication and power transmission medium that handles both electrical power delivery and digital data communication simultaneously. The cable structure incorporates multiple conductors that serve dual purposes of powering downhole sensors and transmitting measurement data to the surface
3Ease of operation
If multiple actuators are controlled independently with separate systems, then individual valve control is improved, but operational efficiency and ease of management deteriorate
Solution Approach 1:
The patent merges multiple actuator control functions into a single integrated control system located at the surface. The switching means consolidates control circuits for all SOVs into one unit, allowing operators to control multiple downhole valves through a single interface rather than managing separate control systems, thereby improving operational efficiency while maintaining independent valve control capability
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 control of fluid flow from multiple zones and efficient power and data communication to downhole sensors, reducing the complexity of managing multiple actuators and improving operational efficiency in oil and gas well systems.
Implementation Method 1
opening and closing of each valve requires electrical operation of an actuator such as a solenoid operated valve (SOV)
Implementation Method 2
An electrical system utilizing a hydraulic control system with piston devices and solenoid-operated valves (SOV)
Data Source
AI summary
A well system with an electrical control and sensing system includes a first conductor and a second conductor. A first switching circuit is coupled between the first conductor and the second conductor. The first switching circuit includes a first electrically powered device and a first diode coupled to the first electrically powered device. A sensor circuit is coupled between the first conductor and the second conductor. The sensor circuit includes a sensor and a sensor diode coupled to the sensor and configured to permit current flow through the sensor circuit from the second conductor to the first conductor.