Acoustic Flow Meter Tool for Downhole Fluid Velocity Measurement
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Solution Overview
Problem
Downhole flow meter tools face limitations in measuring fluid velocity accurately across a wide range of conditions due to mechanical mechanisms, requiring multiple tools for specific conditions and compromising on accuracy when adapting to varying conditions.
Innovation Solution
A downhole tool incorporating an acoustic flow meter module with ultrasonic transducers, an electronics module for data processing and self-compensation, and a fast hybrid telemetry module for bidirectional data transmission, allowing for accurate measurement of fluid temperature, velocity, and density over a wide range of conditions without mechanical limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical rotating mechanisms are used to measure fluid velocity, then measurement can be performed under specific working conditions, but the tool cannot adapt to varying conditions without swapping tools and measurement accuracy is compromised
Solution Approach 1:
The patent replaces mechanical rotating mechanisms with an acoustic flow meter that uses ultrasonic transducers to measure fluid velocity. The system transmits acoustic signals through the fluid and measures the time-of-flight difference between upstream and downstream directions to calculate velocity, eliminating mechanical contact and enabling adaptation to varying conditions without compromising measurement accuracy
Solution Approach 2:
The acoustic flow meter dynamically adjusts measurement parameters such as acoustic signal frequency, pulse duration, and gain settings based on detected fluid velocity and flow conditions. This allows the system to maintain optimal measurement accuracy across a wide range of wellbore conditions including different fluid types, velocities, and temperatures
2Measurement precision
If multiple flow meter tools are used for specific conditions, then measurement accuracy for each condition is maintained, but device complexity and the need for tool swapping increases
Solution Approach 1:
The acoustic flow meter is designed as a universal tool that can accurately measure fluid velocity under diverse wellbore conditions including different fluid types (oil, gas, water), velocity ranges, and temperatures. The system incorporates adaptive algorithms and adjustable parameters that enable a single tool to replace multiple condition-specific flow meters, eliminating the need for tool swapping during operations
3Device complexity
If mechanical flow meter tools are used, then structure is simple, but friction between moving parts causes measurement inaccuracies and reduces durability
Solution Approach 1:
The patent eliminates mechanical moving parts by using ultrasonic transducers that generate and detect acoustic waves through the fluid. The measurement is based on electronic time-of-flight calculations rather than mechanical rotation, completely removing friction between moving parts. This non-contact acoustic measurement method significantly improves reliability, eliminates wear-related failures, and enhances durability in harsh downhole environments
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 accurate and resilient data acquisition across varying wellbore conditions, reducing measurement inaccuracies and the need for multiple tools, with durable design and real-time data transmission capabilities.
Implementation Method 1
an acoustic flow meter tool module provided for measurement of an acoustic wave traveling with the flow of the fluid and an acoustic wave traveling against the flow of the fluid
Implementation Method 2
measurement of fluid velocity via acoustics instead of via mechanical means
Implementation Method 3
one ultrasonic transducer for measuring the density of the fluid
Implementation Method 4
one temperature sensor for measuring the temperature of the fluid; temperature compensation in an acoustic flow meter
Data Source
AI summary
Disclosed is a downhole tool comprising a fast hybrid telemetry module, and electronics module, and an acoustic flow meter tool module. Suitably, the fast hybrid telemetry module, the electronics module, and the acoustic flow meter tool module are assembled in series. Initially, the acoustic flow meter tool module is preferably provided for regular measurement of fluid temperature, fluid velocity, and fluid density in downhole oilfield production applications. Preferably, the electronics module is provided for data processing and self-compensation of the acoustic flow meter tool module (i.e., automated adjustment of acoustic wave energy and signal conditioning settings to perform flow rate measurements in a wide range of well bore conditions). Finally, the fast hybrid telemetry module is configured for bidirectional data transmission between the downhole tool and a surface data acquisition and monitoring station.