Monolithic Shaped Charge Tubular Cutter for Uniform Detonation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shaped charge tubular cutters face issues such as detonation front overrunning, shock wave deflections, and energy loss due to separation between explosive material sections and housing plates, leading to non-uniform jet formation and reduced penetration efficiency.
Innovation Solution
A shaped charge tubular cutter assembly with a single-piece construction, featuring a circular liner with diagonal and vertical sections, and a main charge that adheres to the liner, along with a thin radial detonation disc, which ensures uniform detonation and minimizes shock wave deflections, thereby directing more explosive energy into cutting action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional shaped charge tools use multiple separate explosive material sections, then the device complexity is reduced and ease of manufacture is improved, but detonation front overrunning occurs and energy utilization efficiency deteriorates
Solution Approach 1:
The patent combines multiple separate explosive material sections into a single monolithic explosive charge without internal separations or interfaces. This merging eliminates the detonation front overrunning that occurs at interfaces between separate sections, ensuring uniform shock wave propagation and maximizing energy utilization efficiency while maintaining manufacturing feasibility through single-piece construction methods
2Ease of manufacture
If conventional shaped charge tools use separate explosive material sections with interfaces, then manufacturing is simplified, but shock wave deflections occur and manufacturing precision of jet uniformity deteriorates
Solution Approach 1:
The patent merges separate explosive sections into a single monolithic charge that eliminates internal interfaces. This prevents shock wave deflections at interfaces, ensuring uniform shock wave propagation and consistent liner jet formation across the entire charge, thereby achieving high manufacturing precision in jet uniformity while maintaining ease of manufacture through integrated construction
3Force
If conventional shaped charge tools use thick explosive material sections, then the charge provides sufficient cutting power, but shock wave cross propagation occurs and energy utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality by creating a monolithic explosive charge with optimized local density and composition characteristics. The uniform structure without interfaces ensures consistent shock wave propagation throughout the charge volume, preventing energy loss from cross propagation while maintaining sufficient cutting power through appropriate charge mass and energy density distribution
4Ease of operation
If conventional shaped charge tools use separated explosive components, then assembly is easier, but detonation reliability deteriorates due to front overrunning
Solution Approach 1:
The patent merges separate explosive components into a single monolithic charge that eliminates interfaces where detonation front overrunning occurs. This integrated construction ensures reliable and uniform detonation propagation throughout the entire charge, improving detonation reliability while maintaining ease of operation through simplified single-piece assembly procedures
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 enhances cutting efficiency by utilizing up to 70% of explosive energy, preventing detonation front overrunning and shock wave cross propagation, resulting in a more uniform and effective severing of tubular members.
Implementation Method 1
Once the charge is detonated, a shock wave propagates radially along the transverse plane between the circular half charges and collides with the V-shaped liner, forcing the two liner surfaces together at high speeds.
Implementation Method 2
the shaped charge is detonated
Data Source
AI summary
Explosive cutter assemblies and methods include a liner having a single unitary body, and an explosive charge disposed within the liner. The explosive charge includes a continuous unitary body of explosive material having a first area disposed in association with an inner surface of the liner and a second area extending from the center of the assembly to the first area. A detonator can be used to ignite the second area of explosive material, causing propagation of a detonation to the first area, which in turn causes deformation of the liner and projection of the liner toward a target to form a cut. An adaptor sub having a detonator within can be inserted into the cutter assembly to secure the assembly together, position the detonator in association with the explosive material, and engage a conduit usable to raise and lower the cutter assembly and transmit a detonation signal.