Interval Control Valve Position Feedback for Hydraulic Pressure Calibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current interval control valve (ICV) positioning systems face challenges in accuracy and efficiency due to time-consuming step-wise movements in downhole control modules and calibration difficulties in surface positioning systems, which are affected by line lengths and downhole environmental factors.
Innovation Solution
A novel valve positioning system utilizing a downhole position sensor to provide direct ICV position feedback to a surface controller, allowing for the creation of ICV positioning models that predict accurate position control under actual wellbore conditions, incorporating parameters like lag time, move speed, and response delay, and enabling adaptive calibration based on real-time data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downhole control modules are used for ICV positioning, then ICV positioning can be achieved without reentry, but the step-wise movements are time-consuming and reduce productivity
Solution Approach 1:
The patent replaces the mechanical step-wise control mechanism with a hydraulic positioning system that uses fluid pressure to achieve continuous, smooth valve movement. The hydraulic system allows the ICV to move continuously to any position within its range, eliminating the discrete step-wise movements and significantly reducing positioning time while maintaining reliable control capability.
2Reliability
If surface positioning systems are used for ICV control, then ICV positioning can be achieved, but calibration is difficult due to line lengths and environmental factors
Solution Approach 1:
The patent incorporates a position sensor that provides real-time feedback on the ICV position to the surface control system. This feedback mechanism allows the system to monitor actual valve position and compare it with the target position, automatically compensating for variations caused by different line lengths and downhole environmental conditions. The feedback loop eliminates the need for complex manual calibration procedures while ensuring accurate positioning.
3Ease of operation
If hydraulic pressure control is used for ICV movement, then continuous positioning is possible, but position accuracy is affected by environmental factors
Solution Approach 1:
The position sensor provides continuous feedback on the actual ICV position, allowing the control system to detect and correct deviations from the target position caused by environmental factors such as temperature changes and pressure variations. This closed-loop control ensures high position accuracy while maintaining the flexibility of continuous hydraulic positioning.
Solution Approach 2:
The patent replaces open-loop mechanical positioning with a closed-loop hydraulic positioning system that uses feedback control. The hydraulic system provides continuous positioning capability while the feedback mechanism compensates for environmental disturbances, achieving both operational flexibility and measurement precision.
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 enhances ICV maneuver accuracy and reduces the need for costly and error-prone downhole control modules by generating predictive models that account for environmental and tool condition changes, improving overall ICV positioning efficiency and reliability.
Implementation Method 1
a position sensor coupled to the ICV, wherein the position sensor is configured to measure a position of the ICV
Implementation Method 2
applying a first series of differential pressure values to the hydraulic-open line
Data Source
AI summary
Techniques for correlating changing hydraulic pressure differentials with interval control valve (ICV) movements are contemplated. In some aspects, the disclosed technology includes include methods for applying, by a surface controller, a series of differential pressure values to a hydraulic-open line, receiving, from a position sensor, a corresponding valve position for each of the differential pressure values, and calculating a lag time, a move speed and a response delay for each of the first series of differential pressure values. In some aspects, the method can further include steps for generating an ICV positioning model based at least in part on the lag time, the move speed, and the response delay calculated for each of the first series of differential pressure values. Systems and computer-readable media are also provided.