Solid State Dual Firing Circuit for Perforating Guns
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Solution Overview
Problem
Current perforating methods in subterranean wells rely on explosive perforating guns, which can be inefficient and lack precise control over detonation sequences, particularly in complex well configurations.
Innovation Solution
A solid state dual firing circuit system is introduced, utilizing a transformer with multiple secondary coils and MOSFETs to control voltage and polarity, allowing sequential firing of perforating guns and deactivation of tools, enabling precise electrical firing of detonators through a wireline system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional explosive perforating guns are used, then perforation can be achieved, but precise control over detonation sequences is lacking and efficiency is reduced
Solution Approach 1:
The patent replaces traditional mechanical/explosive initiation systems with solid-state electronic firing circuits. The system uses electronic switches (MOSFETs or IGBTs) controlled by microprocessors to precisely control detonation timing and sequences, substituting mechanical timing mechanisms with electronic control for improved precision and efficiency
Solution Approach 2:
The invention changes the control parameters from mechanical/explosive timing to electronic parameters including voltage, current, and digital timing signals. The solid-state firing circuit uses adjustable electronic parameters to control detonator activation, enabling precise sequencing and improved productivity through programmable control
2Adaptability or versatility
If multiple tools are activated simultaneously, then comprehensive well completion can be achieved, but safety is reduced and control is lost
Solution Approach 1:
The patent implements preliminary action by using the solid-state firing circuit to pre-program and sequentially activate tools in a controlled manner. The system can prepare and stage multiple tool activations before actual operation, allowing safety checks and precise timing control before each tool fires, thereby maintaining versatility while improving safety
Solution Approach 2:
The invention introduces dynamic control through the solid-state firing circuit, which can adjust activation timing and sequences in real-time based on operational conditions. The system dynamically controls which tools are activated and when, providing adaptable control that enhances both versatility and safety through programmable sequencing
3Ease of operation
If traditional firing circuits are used, then simple operation is maintained, but adaptability to various detonator types and well configurations is limited
Solution Approach 1:
The patent implements universality through the solid-state firing circuit design that can accommodate multiple detonator types (electronic, pyrotechnic, bridgewire) and various well configurations through programmable control. The circuit uses universal electronic switching components that can be programmed to work with different tool strings and detonator configurations while maintaining ease of operation through standardized interfaces
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 system provides precise and controlled detonation of perforating guns, improving efficiency and safety by allowing sequential firing and deactivation of tools, adapting to various detonator types and well configurations.
Implementation Method 1
A solid state dual firing circuit system is introduced, utilizing a transformer with multiple secondary coils and MOSFETs to control voltage and polarity
Implementation Method 2
utilizing a transformer with multiple secondary coils and MOSFETs to control voltage and polarity, allowing sequential firing of perforating guns
Implementation Method 3
raising the voltage on the wireline to signal a solid state dual firing circuit within the perforating gun string to energize a detonator
Data Source
AI summary
A method and apparatus for firing a detonator in a perforating gun string into a wellbore to a predetermined location using solid state electronics comprising: raising the voltage on the wireline to signal a solid state dual firing circuit within the perforating gun string to energize a detonator, energize the detonator, opening the detonator, firing a first perforating gun, and lowering the voltage of the wireline.