Powdered Explosive Liner with Central Aperture for Perforation
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Solution Overview
Problem
Shaped charge liners used in perforation tools often collapse, leading to a high-speed jet that creates tunnels in subterranean formations, but portions of the liner, known as slugs, trail behind and can clog the tunnels, reducing their effectiveness and promoting debris accumulation.
Innovation Solution
A die set and method for forming explosive charge liners from powdered material, where the die block and punch are configured to exclude material from the center axis, allowing for higher density compression along the sides, resulting in a deep-penetrating liner with a hole at the narrow end that minimizes slug formation and enhances tunnel penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the liner is compressed to high density, then penetration depth is improved, but slug formation increases and clogs tunnels
Solution Approach 1:
The die set creates different density characteristics in different regions of the liner. The sides of the liner are compressed to high density for penetration, while the center axis remains less dense to prevent slug formation. This local differentiation resolves the contradiction between achieving deep penetration and preventing tunnel clogging.
Solution Approach 2:
The center axis portion of the liner is extracted or removed from the compressed material bed. By excluding material from the center axis during compression, the design eliminates the source of slug formation while maintaining high density in the side regions that are responsible for penetration.
2Object-generated harmful factors
If material is excluded from center axis, then slug formation is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The die set is segmented into functional components: a die block with a basin and a punch with a specific geometry. This segmentation allows each component to be optimized independently for its specific function, making the overall manufacturing process more manageable while achieving the desired material distribution.
Solution Approach 2:
The die block and punch are pre-configured with specific geometries that automatically exclude material from the center axis during the compression process. This preliminary design of the tooling ensures that the correct material distribution is achieved without requiring complex controls or post-processing.
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 results in a shaped charge liner that disintegrates fully upon detonation, reducing clogging and enhancing the penetration depth and flow efficiency of the tunnels by maintaining higher density along the sides, thus improving the effectiveness of the perforation process.
Implementation Method 1
pressing the punch into the powdered material in the basin to form the explosive charge liner
Implementation Method 2
shaped charge liners used in perforation tools often collapse, leading to a high-speed jet that creates tunnels
Data Source
AI summary
A method of making an explosive charge liner comprises introducing powdered material into a basin defined by a die block, where a punch is shaped to interact with the basin, excluding the powdered material from a central portion of the basin, pressing the punch into the powdered material in the basin to form the explosive charge liner, and removing the explosive charge liner from the die block. The explosive charge liner comprises an aperture in an apex area of the explosive charge liner corresponding to the central portion when removed from the die block.