Glass Core Drilling Fluid Damage Evaluation Instrument

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Solution Overview

Problem

Existing dynamic damage evaluation instruments for drilling fluids are unable to accurately assess fluid loss and damage due to design limitations, including incomplete fluid measurement, inadequate high-pressure sealing, and lack of visualization, leading to inefficiencies in simulating underground conditions.

Innovation Solution

A dynamic damage evaluation instrument utilizing a glass core with a controller, support, and advanced components such as a magnetic coupling, temperature and pressure sensors, and a flow meter, which includes a guide rod with a piston and valves to accurately measure fluid loss, and a power component with a motor and winding to simulate high-pressure conditions, allowing for real-time monitoring and adjustment of the drilling fluid's status and rotational speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a horizontal adjusting rod is used to receive drilling fluid flowing out from the core port, then the fluid loss measurement is simplified, but a large amount of drilling fluid remains in the gaps of the adjusting rod, reducing measurement accuracy

Engineering Contradiction:

Improvefluid loss measurement simplicityVSAvoidfluid loss measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent inverts the traditional horizontal adjusting rod design by tilting it at an angle of 10-20 degrees. This inversion of the horizontal position allows drilling fluid to flow more completely into the receiving container under gravity, reducing residual fluid in the rod gaps and improving measurement accuracy while maintaining operational simplicity

Inventive Principle:

Principle #13The other way round (Inversion)

2Quantity of substance

If the adjusting rod length is increased to improve fluid collection, then more drilling fluid can be received, but the amount of fluid remaining in gaps increases, reducing measurement accuracy

Engineering Contradiction:

Improvedrilling fluid collection volumeVSAvoidfluid loss measurement accuracy

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

Rather than simply increasing the horizontal length of the adjusting rod which would proportionally increase gap volume and fluid retention, the patent tilts the rod at 10-20 degrees. This angular inversion allows the same or longer rod length to collect equivalent fluid volume while reducing the horizontal gap projection, thereby minimizing residual fluid and improving measurement accuracy

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If air drive of magnetic coupling is used to drive the stirrer under high pressure, then high pressure sealing requirements are met, but the torque is low and rotational speed cannot be measured, making it difficult to reach expected shear rate

Engineering Contradiction:

Improvehigh pressure sealingVSAvoidstirrer rotational speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent introduces a magnetic coupling mechanism as an intermediary between the external motor and the internal stirrer. The magnetic coupling transmits rotational force through the high-pressure boundary without mechanical penetration, maintaining sealing integrity while enabling adequate torque transmission and rotational speed control to achieve expected shear rates in the drilling fluid

Inventive Principle:

Principle #24Intermediary (Mediator)

4Strength

If stainless steel core holders are used, then structural strength is sufficient, but there is no visualized design and users cannot know the status of the core in use

Engineering Contradiction:

Improvecore holder structural strengthVSAvoidcore status visibility

Core Design Contradiction:

StrengthVSLoss of information

Solution Approach 1:

The patent incorporates transparent or translucent sections in the core holder design, allowing visual observation of the core status during operation. This optical modification maintains the structural strength of the stainless steel construction while enabling users to monitor core condition, fluid flow, and experimental progress without opening the system or interrupting the experiment

Inventive Principle:

Principle #32Color changes

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 instrument provides improved accuracy in fluid loss measurement, flexibility in core support, real-time temperature monitoring, and enhanced rotational speed simulation, enabling more precise evaluation of drilling fluid damage and better adaptation to high-pressure environments.

Implementation Method 1

the air drive of a magnetic coupling is usually adopted

Methodology Applied

Scientific EffectMagnetic coupling: Magnetic Field

Data Source

PatentUS11650194B2Dynamic damage evaluation instrument of drilling fluid based on glass core

Publication Date: 2023.05.16 CHENGDU UNIVERSITY OF TECHNOLOGY

AI summary

A dynamic damage evaluation instrument of drilling fluid based on a glass core includes a controller and a support. A kettle body is provided on the support, a well for receiving drilling fluid is provided inside the kettle body, and a well cover is provided at an upper end of the kettle body. A core holding assembly communicating with the well is provided at a side of the kettle body, and a metering assembly is movably provided at the other end of the core holding assembly. A stirrer for stirring drilling fluid is provided inside the well, and a power component for driving the stirrer is provided outside the kettle body. A data detection hole for mounting a temperature and pressure sensor and a pressurization hole for mounting a pressurization device are formed on the well cover.