Addressable Switch Cartridge for Downhole Explosive Detonation Safety
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Solution Overview
Problem
Conventional addressable switches used in the oil and gas industry are often too large for various diameter wireline tools, are destroyed after detonation, and lack a safe barrier between the perforating panel and explosive devices, posing safety risks and inefficiencies in operations.
Innovation Solution
A reusable housing system with an integrated addressable switch that only allows voltage and current to reach the explosive device upon activation, creating a safe barrier and enabling multiple uses without external wiring, conforming to safety standards like API RP67.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional addressable switches are used in wireline tools, then explosive devices can be controlled, but the switches are too large to fit in various diameter wireline tools
Solution Approach 1:
The addressable switch system is divided into two separate components: a reusable housing that remains on the wireline tool and a disposable cartridge that is inserted into the housing. This segmentation allows the housing to be sized appropriately for the wireline tool while the cartridge contains the addressable switch functionality in a compact form factor that can be deployed and replaced after use.
Solution Approach 2:
The cartridge is designed to be inserted into and nested within the reusable housing. This nested configuration allows the addressable switch cartridge to fit within the constrained space of the wireline tool housing, enabling deployment in various diameter tools while maintaining the safety barrier functionality.
2Productivity
If conventional addressable switches are used, then explosive devices can be activated, but the switches are destroyed after detonation and cannot be reused
Solution Approach 1:
The system separates the addressable switch into a disposable cartridge that is destroyed during detonation from the reusable housing that remains intact. The housing is designed to withstand detonation forces and can be removed, cleaned, and reused with a new cartridge, thereby improving productivity through reusability while acknowledging that the cartridge itself is consumed.
Solution Approach 2:
The reusable housing is designed with structural features that protect it from the full force of detonation, cushioning the housing against damage while the cartridge absorbs the primary impact. This allows the housing to survive the detonation event and be reused.
3Reliability
If minimal electrical current protection is used, then wiring is simpler, but safety protocols must be strictly followed and inadvertent detonation risks increase
Solution Approach 1:
The addressable switch cartridge is designed to remain in a safe, non-conductive state by default before activation. The circuit is configured so that voltage and current are blocked until the cartridge is specifically addressed and activated through the wireline connection, preventing inadvertent detonation while maintaining operational simplicity.
Solution Approach 2:
The addressable switch cartridge acts as an intermediary device between the wireline tool and the explosive device. It provides intelligent control by selectively allowing or blocking electrical current based on activation commands, thereby enhancing safety without requiring complex external protection systems or strict manual protocols.
4Ease of operation
If mechanical switches are used to change polarity, then individual detonation is possible, but devices must be shot in series with no means to skip devices or diagnose wiring
Solution Approach 1:
The addressable switch cartridge incorporates diagnostic capabilities that provide feedback about the health and status of the cartridge and its connection to the explosive device. This allows operators to identify wiring issues, cartridge problems, or device status without complex external testing equipment, thereby improving ease of operation while maintaining manageable system complexity.
Solution Approach 2:
The patent replaces mechanical switches and manual polarity-changing mechanisms with an electronically controlled addressable switch. This substitution allows for selective activation of individual devices through electronic addressing via the wireline connection, enabling operators to skip devices or detonate specific ones without physical reconfiguration, thereby simplifying operation while providing enhanced diagnostic capabilities.
Data Source
AI summary
Safe addressable firing controls positioned within a reusable housing that only allows voltage and current from the shooting panel to reach the explosive device by addressing the switch to open allowing electricity to pass through it and setting off the chain reaction during detonation, wherein the safe addressable firing controls positioned within a cartridge that creates a safety barrier between the surface equipment and a downhole tool, such as an explosive device.