Fluid Density and Viscosity Tool with Vibration Noise Filtering

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Solution Overview

Problem

External vibrations from drilling equipment interfere with the accurate measurement of cantilever beam vibrations, causing noise that degrades the accuracy of fluid property characterization in wellbore environments.

Innovation Solution

A system with a cantilever beam, actuator, sensor, and accelerometer is used to generate and filter signals, employing an adaptive filter to reduce the effect of external vibrations on the cantilever beam vibrations, enhancing signal processing accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If drilling equipment operates in the wellbore environment, then fluid production and drilling operations can be performed, but external vibrations are generated that interfere with cantilever beam vibration measurements

Engineering Contradiction:

Improvefluid production and drilling operationsVSAvoidcantilever beam vibration measurement accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent introduces an accelerometer as an intermediary device that measures external vibrations separately. This intermediary sensor captures the vibration noise caused by drilling equipment, allowing the system to distinguish between cantilever beam vibrations and external vibration interference, thereby maintaining measurement precision while enabling continuous drilling operations

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts the external vibration component from the combined vibration signal by using the accelerometer to measure and separate the noise portion. This extraction process isolates the cantilever beam vibration signal from the drilling-induced vibrations, enabling accurate fluid property measurements even during active drilling operations

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If external vibration filtering is applied to improve measurement accuracy, then signal processing complexity increases

Engineering Contradiction:

Improvefluid property characterization accuracyVSAvoidsignal processing system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The accelerometer serves as a mediator that provides direct measurement of external vibrations, eliminating the need for complex algorithms to estimate or infer noise characteristics. This intermediary approach simplifies the filtering process by providing explicit noise data that can be directly subtracted from the combined signal

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system uses feedback from the accelerometer to continuously monitor and compensate for external vibrations in real-time. This feedback mechanism allows the signal processor to dynamically adjust the filtering based on actual vibration conditions, maintaining high measurement precision without requiring overly complex predetermined filtering algorithms

Inventive Principle:

Principle #23Feedback

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 system provides a filtered signal that accurately represents cantilever beam vibrations, allowing for precise determination of fluid properties such as viscosity and density by reducing the impact of external noise.

Implementation Method 1

an actuator connected to the cantilever beam and configured to cause the cantilever beam to vibrate

Methodology Applied

Scientific EffectMechanical actuation:

Implementation Method 2

a sensor connected to the cantilever beam and configured to generate a first signal representing a cantilever beam vibration of the cantilever beam

Methodology Applied

Scientific EffectVibration detection:

Implementation Method 3

an accelerometer connected to at least one of the sensor or the sensor housing, the accelerometer configured to generate a second signal representing an external vibration of the sensor housing

Methodology Applied

Scientific EffectAcceleration detection: Accelerometer

Implementation Method 4

a signal processor configured to receive, as input, the first signal and the second signal and to generate, as output, a filtered signal that reduces an effect of the external vibration on the cantilever beam vibration

Methodology Applied

Scientific EffectSignal filtering:

Data Source

PatentUS12461269B2Fluid density and viscosity measurement tool with noise cancellation

Publication Date: 2025.11.04 SCHLUMBERGER TECH CORP

AI summary

A system including a sensor housing including a channel, and cantilever beam connected to the sensor housing and disposed within the channel. The system also includes an actuator connected to the cantilever beam and configured to cause the cantilever beam to vibrate. A sensor is connected to the cantilever beam and is configured to generate a first signal representing a cantilever beam vibration of the cantilever beam. The system also includes an accelerometer connected to at least one of the sensor and the sensor housing, the accelerometer configured to generate a second signal representing an external vibration of the sensor housing. The external vibration changes the cantilever beam vibration. The system also includes a signal processor configured to receive, as input, the first signal and the second signal and to generate, as output, a filtered signal that reduces an effect of the external vibration on the cantilever beam vibration.