Perforating Gun Nested Charge Tube Centralizing Insert
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Solution Overview
Problem
Current perforating guns used in oil and gas completions operations face challenges in minimizing overall length while ensuring proper alignment and detonation of perforating charges, which affects efficiency and deployment complexity.
Innovation Solution
The design incorporates a charge cartridge with centralizing inserts and an orienting centralizer, allowing for toolless assembly and alignment of perforating charges within a carrier tube and conductor sub, minimizing length through optimized geometries and features like spirally extended access ports and latching mechanisms, and facilitating efficient detonation with a conductor assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional perforating gun designs are used, then charge alignment and detonation reliability are maintained, but overall length cannot be minimized
Solution Approach 1:
The charge tube is nested within the carrier tube, and the conductor sub is nested within the carrier tube. This nested configuration allows multiple functional components to occupy the same radial space, reducing the overall length of the perforating gun while maintaining proper charge alignment through the centralizing insert that ensures the charge tube remains coaxially positioned within the carrier tube.
Solution Approach 2:
The invention transitions from a side-by-side or sequential arrangement of components to a concentric, multi-dimensional nesting arrangement. The charge tube, conductor sub, and centralizing insert are arranged in concentric cylinders, utilizing radial space efficiently to minimize axial length while maintaining precise charge alignment through the centralizing features.
2Manufacturing precision
If complex assembly mechanisms are used, then charge alignment is ensured, but on-site assembly complexity increases
Solution Approach 1:
The centralizing insert is designed to automatically center the charge tube within the carrier tube through its geometric features, such as tapered surfaces or radial positioning elements, without requiring external alignment tools or complex adjustment mechanisms. This self-aligning feature simplifies on-site assembly while ensuring precise charge alignment.
Solution Approach 2:
The charge tube and centralizing insert are pre-assembled as a unit before deployment to the wellsite. This preliminary assembly ensures proper alignment features are already in place, reducing the complexity of on-site assembly operations while maintaining charge alignment precision during the perforation 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
This configuration reduces the overall length of the perforating gun, enhances charge alignment, and simplifies on-site assembly, improving deployment efficiency and detonation reliability.
Implementation Method 1
The conductor sub is adapted to: axially trap the charge cartridge within the carrier tube; and conduct electricity to and/or from the charge cartridge to facilitate detonation of the ballistic(s)
Implementation Method 2
The charge tube is diametrically centered within the carrier tube with the centralizing inserts
Data Source
AI summary
A perforating gun used in oil and gas completions operations. A gun string including the perforating gun and one or more additional perforating guns substantially identical to the perforating gun.