Integrated Loading Tube with Molded Shaped Charge Holders
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Solution Overview
Problem
Conventional loading tubes for perforating guns are costly to manufacture due to the need for machining and the use of plastic jackets or metal tabs to secure shaped charges, especially for complex orientations.
Innovation Solution
The loading tube is divided into sections made from plastic or high-density polystyrene, with integrated holding structures and anti-rotation features, allowing for precise detonation and reduced manufacturing costs through methods like injection molding or 3D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional steel loading tubes with machined cutouts and plastic jackets are used, then shaped charges can be securely held in desired orientations, but manufacturing cost increases significantly
Solution Approach 1:
The patent combines the loading tube body and holding structures into a single integrated component made from high-density polystyrene or similar material. The holding structures are formed directly as part of the tube through molding or 3D printing, eliminating the need for separate metal tabs, plastic jackets, and machining operations. This merging of functions reduces part count and manufacturing complexity while maintaining shaped charge security.
Solution Approach 2:
The patent changes the material parameter from conventional steel to high-density polystyrene or similar polymers. This material substitution enables direct molding of complex holding structures without machining, dramatically reducing manufacturing cost while providing sufficient strength and orientation precision for the application.
2Manufacturing precision
If complex orientation patterns are machined into steel loading tubes, then precise detonation orientation is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces traditional mechanical machining processes with molding or 3D printing technologies. These additive or mold-based processes can directly create complex three-dimensional holding structures with precise orientations without requiring multiple machining steps, tool changes, or assembly operations, thereby reducing manufacturing complexity while maintaining or improving precision.
Solution Approach 2:
The patent incorporates all holding structures and orientation features directly into the loading tube body during the molding or 3D printing process. This preliminary formation of all necessary features eliminates subsequent assembly steps and ensures precise relative positioning of all holding structures before the tube is even assembled with shaped charges.
3Reliability
If multiple separate components (metal tabs, plastic jackets) are used to secure shaped charges, then reliable mounting is achieved, but the number of parts and assembly steps increases
Solution Approach 1:
The patent merges the loading tube body and holding structures into a single integrated component. The holding structures are formed directly as part of the tube through molding or 3D printing, eliminating the need for separate metal tabs, plastic jackets, and other mounting components. This single-integration approach reduces part count while maintaining mounting reliability through the precisely formed holding structures.
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 solution enables efficient and cost-effective manufacturing of loading tubes with precise detonation capabilities, reducing the need for separate parts and minimizing manufacturing costs while maintaining orientation accuracy.
Implementation Method 1
The exploding blasting caps in turn transfer a detonating wave to a detonator cord which further causes the shaped charges to detonate. The detonated shaped charges form an energetic stream of high-pressure gases and high velocity particles
Data Source
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AI summary
The present disclosure provides a loading tube to be used in a perforating gun. The loading tube is capable of securely engaging with shaped charges while maintaining the structural integrity and being made by injection molding.