Orientable Perforating Gun Assembly for Wire-Safe Charge Alignment
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Solution Overview
Problem
The assembly of perforating guns is prone to issues such as twisted and crimped electrical wires, manual connection of detonators, and safety risks due to physically handling live explosives, while orientation of perforations is crucial for optimal hydraulic fracturing results.
Innovation Solution
An orientable perforating gun assembly with a gun housing, charge carrier, and orientation alignment ring, allowing for reliable detonation without manual wiring and enabling orientation verification of perforations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual assembly of perforating gun components is used, then the system allows flexible configuration, but electrical wires become twisted and crimped during assembly
Solution Approach 1:
The electrical wire assembly is segmented into modular components: a wire management module that separates wire routing from the main assembly process, allowing wires to be pre-assembled in controlled sections before integration into the perforating gun. This prevents twisting and crimping during final assembly while maintaining configuration flexibility.
Solution Approach 2:
A wire management intermediary device is introduced between the electrical wire and the perforating gun components. This intermediary includes guide channels and tensioning mechanisms that maintain wire integrity during assembly, preventing twisting and crimping while allowing flexible gun configuration.
2Adaptability or versatility
If manual connection of detonators is used, then the system allows flexible initiation configuration, but safety risks increase due to physically handling live explosives
Solution Approach 1:
The manual mechanical connection of detonators is replaced with an automated initiation system. Electrically initiated detonators are used instead of mechanically assembled ones, allowing configuration changes through electrical signaling rather than physical handling of live explosives. This maintains initiation versatility while dramatically improving safety.
Solution Approach 2:
The detonator initiation system is designed to be self-activating through electrical signals from the wire management system. Once configured, the system automatically initiates detonators without requiring manual intervention with live explosives, maintaining configuration flexibility while eliminating safety risks associated with handling.
3Device complexity
If perforating gun orientation is not controlled, then assembly is simpler, but hydraulic fracturing results are suboptimal
Solution Approach 1:
The orientation alignment ring is pre-configured with orientation indicators and alignment features before assembly. This allows the perforating gun to be pre-oriented to the correct angle relative to the wellbore axis during assembly, ensuring optimal fracturing results without complicating the assembly process. The pre-set alignment features guide correct installation.
Solution Approach 2:
Orientation indicators use color-coded markings and visual cues on the alignment ring to indicate correct orientation positions. This provides immediate visual feedback during assembly, ensuring proper orientation without requiring complex alignment procedures or increasing assembly complexity. The color system guides operators to the correct configuration.
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
Ensures reliable detonation and accurate orientation of perforations, reducing assembly errors and safety risks, and enhancing hydrocarbon extraction efficiency.
Implementation Method 1
The perforating gun may have explosive charges which are ignited to create holes in the casing and to blast through the formation
Implementation Method 2
a surface signal actuates an ignition of a fuse, which in turn initiates a detonating cord, which detonates the shaped charges
Data Source
AI summary
An orientable perforating gun assembly includes a gun housing and a charge carrier positioned within an interior space of the gun housing. The charge carrier supports a shaped charge in a fixed rotational orientation relative to the gun housing. The orientable perforating gun assembly further includes an orientation alignment ring rotatably connected to a first end of the gun housing.