Perforating Gun Orientation Detection via Electronic Switch
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Solution Overview
Problem
Conventional perforating gun systems for subterranean wells face challenges in reducing tool length, minimizing human error, and ensuring precise orientation of perforating guns, especially in horizontal wells, due to the complexity of wire connections and the need for large initiating cartridges.
Innovation Solution
A modular perforating gun system with an onboard electronic switch and accelerometer that detects orientation and selectively initiates shaped charges, allowing for precise orientation and safe firing in a single plane, reducing the need for wire connections and large cartridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire connections and large initiating cartridges are used for conventional perforating gun systems, then reliable initiation of shaped charges is achieved, but tool length increases and human error risk increases
Solution Approach 1:
The system segments the initiation function by using individual electronic switches for each shaped charge rather than a single large initiating cartridge. Each electronic switch is independently controllable and can be positioned at different locations along the gun body, eliminating the need for one large cartridge and reducing overall tool length while maintaining initiation reliability.
Solution Approach 2:
The patent replaces the mechanical wire connection system with an electronic control system. Electronic switches with accelerometers detect orientation and control initiation electronically, eliminating the need for physical wire connections and large mechanical initiating cartridges, thereby reducing tool length and potential points of failure.
2Reliability
If wire connections are used for initiating perforating charges, then reliable signal transmission is achieved, but device complexity and human error increase
Solution Approach 1:
The patent replaces the mechanical wire connection system with an electronic control system. Electronic switches with accelerometers detect orientation and control initiation electronically, eliminating the need for physical wire connections and large mechanical initiating cartridges, thereby reducing tool length and potential points of failure.
Solution Approach 2:
The electronic switches automatically detect the orientation of each shaped charge using onboard accelerometers and self-regulate the initiation process based on detected orientation. This self-service capability eliminates the need for complex external wire connection systems and manual configuration, reducing both device complexity and potential for human error.
3Reliability
If conventional initiating cartridges are used, then all shaped charges can be initiated, but the size of the initiating device increases
Solution Approach 1:
The system segments the initiation function by using individual electronic switches for each shaped charge rather than a single large initiating cartridge. Each electronic switch is independently controllable and can be positioned at different locations along the gun body, eliminating the need for one large cartridge and reducing overall tool length while maintaining initiation reliability.
Solution Approach 2:
The electronic switch system serves multiple functions: it detects orientation via accelerometers, controls initiation timing, and can individually address each shaped charge. This multi-functional approach replaces the single-purpose large initiating cartridge, significantly reducing the volume required for the initiation system while maintaining full charge initiation capability.
4Ease of operation
If perforating guns are oriented manually, then orientation can be adjusted, but precision and time consumption decrease
Solution Approach 1:
The electronic switches automatically detect the orientation of each shaped charge using onboard accelerometers and self-regulate the initiation process based on detected orientation. This self-service capability eliminates the need for complex external wire connection systems and manual configuration, reducing both device complexity and potential for human error.
Solution Approach 2:
The accelerometers provide real-time feedback on the orientation of each shaped charge, allowing the system to automatically adjust and confirm proper positioning. This feedback mechanism ensures high orientation precision without requiring manual adjustment, and provides immediate verification of correct orientation before initiation.
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 enables efficient and precise perforation by reducing tool length, minimizing human error, and ensuring accurate orientation of perforating guns, enhancing the ease of assembly and operation in challenging well environments.
Implementation Method 1
an onboard accelerometer that detects orientation
Implementation Method 2
When the explosive detonates, the liner metal is compressed into a super-heated, super pressurized jet that can penetrate metal, concrete, and rock
Data Source
AI summary
A method and apparatus for detecting the orientation of each perforating gun in a wellbore and using that information in arming and firing each perforating gun in a perforating gun string.