Quartz Transducer Assembly With Dynamic Thermal Correction
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Solution Overview
Problem
Existing quartz pressure and temperature transducers in oil and gas exploration are limited by their inability to provide accurate measurements in dynamic environments with temperature gradients, as they rely on static temperature compensation and fail to account for changes in heat balance and adiabatic effects, leading to gross offsets in pressure and temperature determinations.
Innovation Solution
A Quartz Pressure and Temperature Transducer Assembly with dynamic correction, utilizing two temperature sensors and a reference resonator, implements a mathematical thermal model for dynamic feed-forward compensation, allowing for accurate pressure and temperature measurements by monitoring temperature gradients and adjusting outputs accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static temperature compensation is used in quartz transducers, then manufacturing is simplified and device complexity is reduced, but measurement precision deteriorates under dynamic temperature conditions
Solution Approach 1:
The patent transitions from static temperature compensation to dynamic temperature compensation by introducing a thermal model that continuously updates compensation parameters based on real-time temperature gradients and rates of change. This allows the transducer to adapt to dynamic thermal conditions in the wellbore environment, resolving the contradiction between device simplicity and measurement accuracy under varying conditions.
Solution Approach 2:
The patent implements preliminary thermal modeling during the design and calibration phase to pre-determine compensation parameters and thermal characteristics. This preliminary action allows the system to anticipate and compensate for thermal effects before they cause measurement errors, achieving high precision without requiring complex real-time hardware modifications.
2Measurement precision
If dynamic temperature compensation is implemented, then measurement precision improves under temperature gradients, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical thermal management systems with a computational approach using thermal modeling and software-based compensation algorithms. This substitution achieves dynamic temperature compensation through mathematical calculations rather than physical thermal control mechanisms, reducing hardware complexity while maintaining measurement precision.
Solution Approach 2:
The patent uses a reference resonator that replicates the thermal response of the pressure resonator without being subjected to pressure. By copying the thermal behavior and comparing it with the pressure resonator output, the system can isolate and compensate for temperature effects, achieving precise measurements without requiring direct physical measurement of temperature gradients.
3Adaptability or versatility
If the transducer responds quickly to temperature changes, then adaptability to dynamic conditions improves, but measurement stability deteriorates due to thermal transients
Solution Approach 1:
The patent implements a feedback mechanism where the thermal model continuously monitors temperature gradients and rates of change, then feeds this information back to adjust compensation parameters in real-time. This feedback loop allows the system to rapidly adapt to thermal changes while maintaining stability by continuously correcting for thermal transients rather than passively responding to them.
Solution Approach 2:
The patent dynamically changes compensation parameters based on the thermal state of the transducer. By adjusting compensation factors according to measured temperature gradients and rates of change, the system maintains optimal performance across varying thermal conditions, resolving the contradiction between rapid adaptability and measurement stability.
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 transducer assembly provides fast and accurate pressure and temperature measurements under non-static conditions by dynamically correcting for temperature changes, enhancing fidelity and minimizing offsets, thus improving thermal management and signal processing.
Implementation Method 1
quartz pressure and temperature transducers consist of precision quartz resonators
Implementation Method 2
pressure changes in the well will cause temperature change within the transducer due to adiabatic effects within the transducer oil-fill as well as the quartz resonator pressure sensor itself
Data Source
AI summary
A quartz transducer having four or more crystal-controlled oscillators intended for measurement of applied pressure and temperature. All four oscillators are controlled by crystal quartz resonators operating in the thickness-shear mode. Two crystals measure the pressure and temperature respectively. A third crystal is a reference, and the fourth crystal may be another reference crystal or a second temperature crystal. The output of the latter is either phase leading or phase lagging the thermal response of the main temperature sensor.