Downhole X-ray Tool Multi-Target Beam Steering
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Solution Overview
Problem
Conventional downhole tools require multiple detectors to acquire data at multiple depths of investigation (DOIs), increasing complexity and cost due to additional hardware needs, such as scintillators and photomultiplier tubes, which are challenging to accommodate within the space constraints of the tool.
Innovation Solution
A downhole tool with an electronic photon generator that includes a cathode, multiple targets, and a beam steering device to direct electrons to different targets, allowing photons to be emitted at various positions and angles, enabling data acquisition at multiple DOIs without the need for additional detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detectors are used to acquire data at multiple depths of investigation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple detection functions into a single detector by using multiple targets that emit photons at different energies. The single detector measures photons from all targets simultaneously, merging what would traditionally require multiple detectors into one device, thereby reducing device complexity while maintaining the capability to measure at multiple depths of investigation
Solution Approach 2:
The single detector is designed to perform multiple functions by detecting photons of different energies from different targets. This universal detector can measure formation properties at multiple depths of investigation without requiring separate specialized detectors for each depth, thus improving measurement precision while avoiding increased device complexity
2Measurement precision
If multiple detectors are used to acquire data at multiple depths of investigation, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple detection functions into a single detector, eliminating the need to manufacture and assemble multiple expensive detector components (scintillators, photomultiplier tubes). This single-detector approach significantly reduces manufacturing cost while maintaining the precision benefits of multi-depth measurement capability
Solution Approach 2:
The universal detector design performs multiple measurement functions simultaneously, replacing what would traditionally require several specialized detectors. This multi-functionality reduces the total number of components needed, thereby lowering manufacturing costs while preserving measurement precision across multiple depths of investigation
3Measurement precision
If multiple detectors are used to acquire data at multiple depths of investigation, then measurement precision is improved, but the tool becomes difficult to accommodate within space constraints
Solution Approach 1:
The patent merges multiple detection functions into a single detector, dramatically reducing the volume required for the detection system. Instead of accommodating multiple large detector assemblies, the tool only needs space for one compact detector, easily meeting space constraints while maintaining multi-depth measurement precision
Solution Approach 2:
The universal detector performs multiple measurement functions in a single compact unit, eliminating the need for multiple separate detector volumes. This multi-functional design fits within the limited space of the downhole tool while preserving the precision benefits of measuring at multiple depths of investigation
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
This approach allows for accurate measurement of geological formation properties, including density and mud cake characteristics, by using data from photons emitted by multiple targets, improving data accuracy and reducing system complexity by eliminating the need for multiple detectors.
Implementation Method 1
an electron accelerator that accelerates electrons towards a selectable set of at least two targets
Implementation Method 2
Each of the at least two targets may have a different spacing from the detector. The electron beam may be directed towards a selected one of the at least two targets to emit photons
Data Source
AI summary
The current disclosure is related to a downhole tool that comprises an electronic photon generator and at least one detector. The electronic photon generator comprises a cathode configured to emit electrons, a first target configured to generate photons when struck by the electrons, a second target configured to generate photons when struck by the electrons, and a beam steering device that directs the electrons to a first or second target. The at least one detector is configured to detect at least some of the photons emitted by the first target and at least some of the photons emitted by the second target.