Well Pump Speed Control via Flow Rate Feedback
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Solution Overview
Problem
Existing pump speed control methods in wells do not effectively optimize production based on real-time fluid flow rates, leading to inefficiencies and potential pump damage from low flow conditions.
Innovation Solution
A method and apparatus that continuously monitor the production flow rate and adjust the pump speed in user-configurable increments based on rising or declining flow rates, using a controller and sensors to optimize production and prevent pump damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pump speed is increased to maximize production, then productivity improves, but pump damage risk increases under low flow conditions
Solution Approach 1:
The system continuously monitors production flow rate and uses this feedback to dynamically adjust pump speed. When flow rate increases, pump speed is increased; when flow rate decreases, pump speed is decreased. This closed-loop feedback mechanism resolves the contradiction by adapting pump operation to actual production conditions, maximizing productivity while preventing damage under low flow conditions.
Solution Approach 2:
The patent implements dynamic pump speed adjustment rather than fixed speed operation. The pump speed control device continuously varies pump speed based on real-time flow rate monitoring, allowing the system to optimize productivity during high flow conditions while protecting the pump during low flow conditions, thus resolving the static contradiction between productivity and reliability.
2Productivity
If pump speed is dynamically adjusted based on flow rate, then production optimization improves, but device complexity increases
Solution Approach 1:
The pump speed control device automatically monitors flow rate and adjusts pump speed without requiring external intervention or complex control algorithms. The system serves itself by using simple comparative logic (increasing speed when flow rises, decreasing speed when flow falls), achieving production optimization while minimizing control system complexity.
3Measurement precision
If continuous monitoring of flow rate is implemented, then production control accuracy improves, but energy consumption increases
Solution Approach 1:
The system implements continuous flow rate monitoring and continuous pump speed adjustment, ensuring that the pump operates optimally at all times. This continuous operation maximizes measurement precision for production control while the energy consumption increase is justified by the continuous optimization of pump efficiency and prevention of damage, resolving the contradiction between measurement accuracy and energy use.
Data Source
AI summary
A method and apparatus for controlling a speed of a pump operating in a well. A first step involves monitoring a production flow rate of fluids produced from the well. A second step involves controlling the speed of the pump with reference to the production flow rate by increasing the speed of the pump when the production flow rate is rising and decreasing the speed of the pump when the production flow rate is declining.