Dummy Well Tubular Setup for Safe Logging Tool Calibration

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Solution Overview

Problem

Existing wellbore tubular and cement conditions impact well integrity, health, safety, and environmental risks, as well as the efficiency of oil and gas production, and current downhole logging tools lack effective testing and calibration methods.

Innovation Solution

A dummy well set-up is used to simulate production conditions, allowing for the testing and calibration of production logging, corrosion logging, and leak detection tools by running them through a tubular system with controlled production fluid simulants and man-made defects to evaluate tool accuracy and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If downhole logging tools are tested in real wells, then tool reliability is improved, but well integrity and HSE risks are compromised

Engineering Contradiction:

Improvelogging tool reliabilityVSAvoidHSE risks and well integrity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent creates a dummy well that is a simplified copy of a real well, containing essential features (tubulars, cement, production conditions) without the associated HSE risks. This allows logging tools to be tested in a safe environment while maintaining test validity, thus improving tool reliability without compromising well integrity or creating HSE hazards.

Inventive Principle:

Principle #26Copying

2Measurement precision

If logging tools are tested with realistic production conditions, then measurement precision is improved, but test complexity increases

Engineering Contradiction:

Improveproduction characteristic measurement accuracyVSAvoiddummy well set-up complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The dummy well is segmented into distinct functional components: tubulars section, cement section, flow-in tube section, and heating section. Each segment serves a specific purpose in creating realistic production conditions. This segmentation allows the system to achieve measurement precision equivalent to real wells while managing complexity through modular design, where each component can be independently configured and tested.

Inventive Principle:

Principle #1Segmentation

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 dummy well set-up enhances the reliability of production and well integrity logging tools by providing realistic testing conditions, improving their accuracy and safety in real-world applications.

Implementation Method 1

a heating section to heat the production fluid simulant

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

a flow-in tube to deliver the production fluid simulant downhole

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Data Source

PatentUS20260002435A1Dummy well set-up for testing logging tools

Publication Date: 2026.01.01 SAUDI ARABIAN OIL CO

AI summary

A dummy well set up for testing down-hole tools includes a plurality of concentric tubulars, which can include man-made defects at known locations. Testing the down-hole tool using the dummy well set up can include running a downhole logging tool into a dummy well, the dummy well comprising a tubular; determining production conditions to simulate a well, the production conditions including a content, pressure, and temperature of a production fluid simulant; pumping the production fluid simulant into the dummy well through a flow-in tube; measuring at least one production characteristic using the downhole logging tool; and evaluating the downhole logging tool based on the production conditions.