Deformable Energy Transfer Device for Sequential Pyrotechnic Ignition
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Solution Overview
Problem
Time delay fuses are not designed for sequential use, leading to failures in igniting subsequent fuses in blasting operations, resulting in costly and time-consuming reinstallation of explosive tools due to incomplete detonation of primary explosives.
Innovation Solution
An energy transfer device with a deformable insert and housing, where the insert's axial passageway constricts upon energy absorption from a first pyrotechnic device, ensuring reliable energy transfer to a second pyrotechnic device, allowing for efficient ignition and preventing tool damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If time delay fuses are stacked in series to achieve longer time delays, then the desired time delay is achieved, but the output charge from one fuse fails to ignite the adjacent fuse
Solution Approach 1:
The patent introduces an intermediary energy transfer device consisting of a forward section, aft section, and axial passageway. This intermediary component receives energy from the first pyrotechnic device's output charge and reliably transfers it to the second pyrotechnic device, ensuring ignition while maintaining the desired time delay functionality.
Solution Approach 2:
The forward section of the energy transfer device is designed to be deformable by the energy output from the first pyrotechnic device. This deformation changes the physical parameters of the forward section, creating a constriction in the passageway that controls and directs the energy transfer to ensure reliable ignition of the second device.
2Duration of action of moving object
If time delay fuses are used in sequential configuration, then longer time delays are achieved, but costly and time-consuming reinstallation is required when ignition fails
Solution Approach 1:
The energy transfer device serves as a reliable intermediary that ensures successful energy transfer between sequential pyrotechnic devices. By guaranteeing ignition through its constriction mechanism, it eliminates the need for reinstallation when working with extended time delay configurations.
3Device complexity
If the output charge from a time delay fuse directly contacts the adjacent fuse, then energy transfer is simple, but the tool including primary explosive must be run back up the hole requiring reinstallation
Solution Approach 1:
Rather than direct contact, the patent uses an intermediary energy transfer device with a controlled passageway system. This intermediary structure reliably directs energy while preventing the harmful outcome of failed detonation, thus avoiding the need to run the tool back up the hole.
Solution Approach 2:
The forward section deformation creates a dynamic constriction that optimizes energy transfer parameters. This controlled parameter change ensures reliable ignition while maintaining a relatively simple overall device structure.
4Duration of action of moving object
If multiple fuses are stacked in series, then longer time delays are achieved, but the operation becomes more complex and dangerous
Solution Approach 1:
The energy transfer device provides a universal solution that can be used with any sequential pyrotechnic device configuration. By standardizing the energy transfer mechanism, it simplifies the overall system while enabling extended time delay operations, reducing both complexity and danger.
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 energy transfer device reliably initiates the firing of subsequent pyrotechnic devices, ensuring consistent blasting operations by converting and directing the energy output from one time delay fuse to another, reducing the need for frequent tool reinstallation and enhancing safety by preventing damage to the tooling.
Implementation Method 1
The body forward section is deformable by the energy output from the first pyrotechnic device such that the diameter of the passageway forward segment is narrowed thereby forming a constriction in the passageway
Data Source
Figure 1~2
Figure 3~5
AI summary
A energy transfer device (10) is provided that is capable of transferring the energy output from one pyrotechnic device (52) to another device (78) for initiating firing thereof. Device (10) comprises a device housing (12) in which a deformable device insert (14) is received. Device insert (14) comprises a central passageway (34) for transmitting the output from a pyrotechnic device (52), including energy, gasses, and/or solids, to another pyrotechnic device (78). The passageway (34) conducts the pyrotechnic device output to a precise location on the second pyrotechnic device (78) where firing is most effectively initiated. The energy transfer device (10) may be employed as a part of a tool (44) used in well completion operations.