Rod Pump Diagnostics via Pressure Wave Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sensor systems for monitoring rod pump systems are expensive, difficult to install, and ineffective in deeper or horizontally drilled wells due to noise and attenuation issues, making it challenging to accurately diagnose operating states and prevent over-pumping or equipment failure.
Innovation Solution
A method and system that utilize pressure sensors to measure and analyze pressure waves generated by the pump plunger, allowing for the detection of various operating states of the rod pump, including over-pumping, gas lock, and mechanical issues, by interpreting changes in amplitude, phase, and mean pressure of the pressure waves, which are then processed by a processor to provide diagnostic information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor systems are used to monitor rod pump systems, then diagnostic capability is provided, but the systems are expensive, difficult to install, and ineffective in deeper or horizontally drilled wells due to noise and attenuation issues
Solution Approach 1:
The patent replaces conventional mechanical sensor systems with an acoustic-based diagnostic system that uses pressure wave analysis. Instead of using complex mechanical sensors that suffer from noise and attenuation in deeper wells, the system utilizes acoustic signals generated by the pump plunger movement to diagnose operating states, thereby eliminating the limitations of mechanical sensor systems while maintaining diagnostic accuracy
Solution Approach 2:
The patent introduces pressure waves as an intermediary medium to transmit diagnostic information from the pump plunger to the surface. By analyzing the acoustic characteristics of pressure waves generated during plunger movement, the system can detect operating states without requiring direct mechanical contact or complex sensor installation in difficult-to-reach locations, thus solving the installation complexity problem
2Reliability
If conventional sensor systems are used, then some monitoring is achieved, but they are ineffective in deeper or horizontally drilled wells due to noise and attenuation
Solution Approach 1:
The patent converts the harmful effects of noise and attenuation into beneficial diagnostic information. By analyzing the acoustic characteristics of pressure waves that propagate through the wellbore fluid, the system uses the very medium that causes attenuation to carry diagnostic signals from the pump to the surface, transforming the propagation challenges into useful information about pump operating states
Solution Approach 2:
The patent utilizes mechanical vibrations in the form of acoustic waves generated by the pump plunger movement. These vibrations propagate through the wellbore fluid and can be detected at the surface, providing reliable monitoring information without being significantly affected by the noise and attenuation that plague conventional electrical sensor systems in deeper wells
3Measurement precision
If pressure sensors are used to measure pressure waves, then accurate diagnostics are achieved, but system cost and complexity increase
Solution Approach 1:
The patent makes the pressure sensor system multi-functional by using a single sensor to detect multiple different operating states (normal operation, gas lock, over-pumping, mechanical issues) through analysis of pressure wave characteristics. This universal approach eliminates the need for multiple specialized sensors or complex sensor arrays, thereby maintaining measurement precision while reducing overall system complexity and cost
Solution Approach 2:
The patent detects different operating states by analyzing changes in parameters of the pressure waves (amplitude, phase, frequency, mean pressure) rather than requiring multiple sensors. By monitoring how these wave parameters change under different operating conditions, the system achieves accurate diagnostics using simple, cost-effective pressure sensing technology
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 approach provides accurate and cost-effective diagnostics for rod pump systems, reducing mechanical wear and preventing equipment failure by identifying operating states and improving maintenance, while being simpler and less expensive to install compared to traditional systems.
Implementation Method 1
sensing pressure waves generated from movement of a pump plunger of the rod pump
Data Source
AI summary
Providing diagnostics or monitoring operation of a rod pressure includes using waves in production fluid produced by the rod pump may be used to determine one or more operating states of the rod pump. The one or more operating states of the rod pump may be used by a user to diagnose or monitor the operation of the rod pump.