Perforating Gun Fire Command Protocol Wireless Telemetry Safety
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Solution Overview
Problem
Existing methods for triggering perforating guns downhole via tubing lack reliable mechanisms to prevent surface or off-depth detonation, particularly in wireless electronic firing systems that lack hardware redundancy and fail-safes.
Innovation Solution
A fire command protocol utilizing wireless telemetry, such as electromagnetic or acoustical signals, with a dongle key, password, and multiple fire commands, ensuring bidirectional communication and orderly fail-safe shutdowns to prevent unintended detonations, incorporating firmware and software redundancies to mimic conventional electronic firing systems' safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless electronic firing systems are used to trigger perforating guns, then ease of operation and productivity are improved, but reliability deteriorates due to lack of hardware redundancy and fail-safes
Solution Approach 1:
The system implements beforehand cushioning by incorporating multiple layers of software-based safety mechanisms including authentication protocols, depth verification, and confirmation sequences before firing. These preventive measures are built into the wireless electronic firing system to compensate for the lack of hardware redundancy, ensuring that unintended detonations are prevented through advance safety checks and validation procedures.
2Device complexity
If wireless telemetry is used for firing commands, then device complexity is reduced, but reliability worsens due to communication errors and lack of bidirectional confirmation
Solution Approach 1:
The system implements feedback by establishing bidirectional communication between the surface control system and the downhole electronic firing head. The firing head sends confirmation signals back to verify command reception and depth verification status, allowing the surface system to receive acknowledgments and error reports. This feedback mechanism ensures reliable wireless telemetry by confirming each step of the firing sequence and enabling error detection and correction.
3Ease of operation
If simplified wireless firing systems are deployed, then ease of operation improves, but safety deteriorates due to lack of fail-safe mechanisms
Solution Approach 1:
The system implements preliminary action by requiring authentication and depth verification to be completed before the firing command is executed. The electronic firing head must confirm it is at the correct depth and has received proper authentication credentials before accepting a fire command. These preliminary actions ensure safety is maintained while preserving ease of operation, as the safety checks are automatically performed as part of the streamlined wireless firing process.
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 protocol effectively prevents surface or off-depth detonations by ensuring unique and confirmed fire commands, providing safety comparable to conventional systems through firmware and software redundancies, adhering to safety standards like API RP67, and allowing for reliable communication and feedback mechanisms.
Implementation Method 1
A methodology is provided for dependably communicating with an electronic firing head that uses wireless telemetry, such as either electromagnetic or acoustical telemetry
Implementation Method 2
A methodology is provided for dependably communicating with an electronic firing head that uses wireless telemetry, such as either electromagnetic or acoustical telemetry
Data Source
AI summary
A system and methodology are provided for improving the triggering (firing) of perforating guns, such as perforating guns deployed downhole via tubing. According to an embodiment, a methodology is provided for dependably communicating with an electronic firing head. The electronic firing head receives signals via wireless telemetry, such as either electromagnetic or acoustical telemetry. The methodology prevents surface or off depth detonation of the perforating guns by utilizing a fire command protocol.