Rod Pump Position Measurement Using Wave-Based Detectors
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Solution Overview
Problem
Current rod position measurement systems in sucker rod pumping are prone to calibration errors and mechanical issues such as vibration and fatigue, leading to inaccurate readings and potential misinterpretation of well performance.
Innovation Solution
Employing wave-based technologies like multi-dimensional imaging LIDAR, radar, sonar, or optical imaging detectors to directly measure rod position, which are not subject to mechanical wear and provide accurate, reliable data for optimizing rod pump performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional position sensors (position switches, Hall-effect transducers, inclinometers) are used to measure rod position, then the measurement system can be implemented with mechanical or electromagnetic components, but the system is prone to calibration errors, mechanical wear, vibration, and fatigue leading to inaccurate readings
Solution Approach 1:
The patent replaces traditional mechanical position sensors (position switches, Hall-effect transducers, inclinometers) with a wave-based measurement system that uses electromagnetic waves (such as laser or radar) to measure rod position remotely. This substitution eliminates mechanical contact and calibration requirements, thereby resolving the contradiction between measurement precision and reliability under mechanical stress.
Solution Approach 2:
The patent introduces an intermediary measurement medium (electromagnetic waves) between the measurement system and the rod. Instead of direct mechanical contact or magnetic field interaction, the system uses wave propagation as an intermediary to transmit measurement information, thereby avoiding direct exposure to mechanical wear and vibration while maintaining measurement accuracy.
2Measurement precision
If wave-based technologies (LIDAR, radar, sonar, optical imaging) are used to measure rod position, then measurement accuracy and reliability are improved by eliminating mechanical wear and calibration errors, but the device complexity and cost increase
Solution Approach 1:
The patent employs wave-based technology that can serve multiple measurement functions (position detection, velocity measurement, distance ranging) using a single system platform. This multi-functionality justifies the increased device complexity by providing versatile measurement capabilities that reduce the need for multiple specialized sensors and systems.
Solution Approach 2:
The patent utilizes changes in wave parameters (such as frequency, phase, or time of flight) to extract position information. By manipulating and analyzing these parameter changes, the system achieves high measurement precision without requiring complex mechanical or electromagnetic sensor arrays, thereby managing device complexity while improving measurement accuracy.
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
The use of wave-based technology detectors enhances the accuracy and reliability of rod position measurement, reducing calibration errors and mechanical issues, thereby improving the efficiency and maintenance of sucker rod pumps.
Implementation Method 1
The wave-based technology detector comprises a multi-dimensional imaging LIDAR
Implementation Method 2
one or more optical receivers, and a controller in communication with the one or more receivers and the one or more laser emitters
Data Source
AI summary
A method of operating a reciprocating system including a rod pump for pumping liquids from a wellbore. The method includes determining rod position of the rod pump using a wave-based technology detector, the rod pump comprising a rod string carrying a down hole pump and a drive system including a drive motor coupled to the rod string through a transmission unit; communicating rod position to a data acquisition system receiving one or more other measurements of rod pump operation to determine rod pump performance; and adjusting at least one operating parameter to enhance rod pump performance. A method of determining operating parameters and optimizing performance of an oil or gas production rod pump, and a system for determining rod position of an oil or gas production rod pump are also provided.