Downhole Hydraulic Leak Detection Using Motor Current Signatures
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Solution Overview
Problem
Hydraulic systems in drilling operations face challenges in accurately detecting leaks due to their complexity and high-pressure, high-temperature environments, leading to reduced performance, increased maintenance costs, and safety hazards.
Innovation Solution
Monitor current consumption of hydraulic components to detect leaks by comparing actual current usage against established signatures, allowing for non-invasive identification of failing or leaking components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional leak detection methods are used in hydraulic systems, then leak detection capability is limited, but system complexity and visibility requirements increase
Solution Approach 1:
The patent replaces traditional mechanical or visual leak detection methods with electrical current monitoring. By measuring current consumption of hydraulic components (pumps, motors, valves) and comparing it against expected current signatures, the system detects leaks through electrical parameters rather than mechanical inspection, thereby improving detection accuracy while maintaining relatively simple system architecture
Solution Approach 2:
The patent introduces current consumption as an intermediary parameter to detect leaks. Instead of directly observing hydraulic leaks, the system monitors the electrical current drawn by hydraulic components, which changes when leaks occur. This intermediary measurement enables indirect but accurate leak detection without requiring direct visibility or complex sensing in the hydraulic fluid path
2Power
If hydraulic systems operate at high pressure and high temperature, then power transmission efficiency is improved, but leak detection difficulty increases
Solution Approach 1:
The patent replaces direct mechanical or visual inspection of high-pressure, high-temperature hydraulic systems with electrical current monitoring. Since current consumption patterns change when leaks occur, even in extreme conditions, the system can detect leaks through electrical measurements that are not affected by the harsh hydraulic environment, thereby maintaining detection capability while allowing high-power operation
3Productivity
If hydraulic system leaks are not detected timely, then operational continuity is maintained, but safety hazards and financial losses increase
Solution Approach 1:
The patent implements continuous feedback monitoring of current consumption by hydraulic components. The system constantly measures current, compares it against expected signatures, and provides real-time feedback about system health. When deviations indicate potential leaks, the system can alert operators or trigger protective actions, enabling timely detection while maintaining operational continuity through proactive maintenance
Solution Approach 2:
The patent enables preliminary detection of leak conditions before they develop into serious safety hazards or financial losses. By continuously monitoring current consumption patterns and identifying early signs of leakage through signature analysis, the system allows preventive maintenance actions to be taken before critical failures occur, thus maintaining both productivity and reliability
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 timely and efficient detection of leaks with minimal disruption, preventing safety hazards and financial losses by pinpointing the source of issues quickly and proactively.
Implementation Method 1
monitoring current consumption of a motor that powers the pump; collecting current consumption data from one or more other components of the plurality of components
Data Source
AI summary
Systems and methods are provided for detecting leaks in a hydraulic system. An example method can include retrieving from memory, current signatures for a plurality of components in a hydraulic system; monitoring current consumption of a hydraulic motor during operation of the motor; determining, based on a comparison of the current consumption and current signature of the motor, an abnormal operating condition of the motor; collecting, based on the determination of the abnormal condition of the motor, current consumption data from the remaining components of the plurality of components; comparing the collected current consumption data to the current signatures corresponding to each of the remaining components of the plurality of components; and identifying, based on the comparison of the collected current data and current signatures, an abnormal operating condition for at least one of the remaining components of the plurality of components.