Wellbore Inspection via High-Energy X-Ray Backscatter Imaging
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Solution Overview
Problem
Current subsurface imaging technologies, particularly in wellbore inspection, face limitations due to insufficient X-ray penetration and resolution, failing to accurately image deep into rock strata and detect micro-conduits in multiple casing configurations.
Innovation Solution
A wellbore inspection system utilizing an ultra-compact high-energy electron accelerator to generate X-rays, combined with a rotating collimator assembly and detector assembly for Compton backscatter imaging, allowing for deep penetration and precise imaging of wellbore structures, including casing and cement integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If prior art X-ray tubes are used, then the device complexity is low, but the X-ray penetration depth and imaging resolution are insufficient
Solution Approach 1:
The patent changes the fundamental parameter of X-ray energy from conventional levels (peak emission at about 50 keV) to high-energy levels (10 MeV electron accelerator producing X-rays with significantly higher energy). This parameter change enables deep penetration into rock strata while maintaining high imaging resolution, resolving the contradiction between measurement precision and device complexity by accepting increased device complexity to achieve the necessary energy level for subsurface imaging
Solution Approach 2:
The patent replaces conventional X-ray tube technology with an electron accelerator-based X-ray source. This substitution introduces a fundamentally different physical mechanism (electron acceleration and bremsstrahlung radiation) to generate high-energy X-rays, enabling penetration depths and resolution levels unattainable with traditional mechanical X-ray tube systems
2Reliability
If conventional X-ray tubes are used, then the ease of operation is good, but the penetration power into deep rock strata is poor
Solution Approach 1:
The patent fundamentally changes the energy parameter from conventional X-ray tube output to high-energy electron accelerator output, achieving the necessary penetration power for deep subsurface imaging. The reliability of penetration is improved by accepting increased operational complexity, as the system requires specialized electron accelerator operation and high-voltage handling procedures
3Measurement precision
If ultrasonic emissions are used for cement bond logs, then the ease of operation is good, but the detection precision of micro-conduits is insufficient
Solution Approach 1:
The patent substitutes ultrasonic detection technology with high-energy X-ray imaging technology. This replacement uses electromagnetic radiation interaction with matter (Compton scattering, photoelectric effect) to detect micro-conduits and cement bond integrity, achieving superior detection precision for small features while accepting the increased complexity of electron accelerator and X-ray detector systems
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 high-resolution, 3D imaging of wellbore environments, enabling accurate detection of defects and characterization of well casing and cement, enhancing well integrity assessment and remedial repair capabilities.
Implementation Method 1
an electron accelerator to generate X-rays
Implementation Method 2
a rotating collimator assembly configured to produce a cone of X-rays
Implementation Method 3
at least one detector assembly configured to collect backscattered X-rays
Data Source
AI summary
A system, method, and apparatus for wellbore inspection comprise an electron accelerator to generate X-rays, a rotating collimator assembly configured to produce a cone of X-rays, and at least one detector assembly configured to collect backscattered X-rays. A position assembly can be provided to move the electron accelerator, rotating collimator assembly, and detector through a wellbore. A computer system is configured to receive data from the detector and generate an image of the wellbore.