Shaped Charge Retainer Clip for Detonating Cord Locking
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Solution Overview
Problem
Current methods for attaching detonating cords to shaped charges in perforating guns are cumbersome and may lead to unexploded ordinance being brought to the surface, posing safety risks due to the complexity of existing fastening mechanisms.
Innovation Solution
A retainer clip system that securely attaches the detonating cord to the shaped charge, featuring a retainer fitting with interfaces that engage the charge holder and detonating cord, allowing for easy installation and ensuring proper detonation by locking into place within the charge tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If current fastening mechanisms are used to attach detonating cord to shaped charge, then the attachment can be achieved, but the process becomes cumbersome and complex
Solution Approach 1:
The retainer fitting combines multiple functions into a single integrated component: it attaches the detonating cord to the shaped charge, positions it correctly, and locks it in place. This merging of functions eliminates the need for separate fastening mechanisms, thereby simplifying the overall device while improving ease of operation.
Solution Approach 2:
The retainer fitting serves multiple purposes simultaneously: it acts as an attachment point, a positioning mechanism, and a locking device. This multi-functionality reduces the number of components needed and simplifies the installation process while maintaining secure attachment.
2Reliability
If complex fastening mechanisms are used, then attachment can be secured, but safety risks increase due to potential for unexploded ordinance
Solution Approach 1:
The retainer fitting is designed to ensure proper alignment and secure attachment of the detonating cord to the shaped charge before detonation occurs. This preliminary positioning action ensures that when detonation occurs, the energy is properly transmitted, eliminating the risk of unexploded ordinance while simplifying the mechanism.
Solution Approach 2:
The retainer fitting automatically ensures proper positioning and secure attachment through its design features such as the oblong interface that translates orientation and the locking mechanism that engages automatically. This self-service capability ensures reliable detonation without requiring complex external fastening mechanisms.
3Ease of operation
If simplified retainer fitting is used, then installation is easier, but securing the detonating cord firmly becomes challenging
Solution Approach 1:
The oblong-shaped first interface is designed with asymmetric geometry that translates rotational orientation into proper positioning of the detonating cord. This asymmetric design ensures firm securing through mechanical engagement while maintaining simplicity of installation, as the shape itself provides the locking action without requiring complex fastening steps.
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 retainer clip system simplifies the installation process, ensures all shaped charges detonate, and prevents disengagement, thereby enhancing safety by securely holding the detonating cord in place, reducing the risk of unexploded charges being brought to the surface.
Implementation Method 1
A shaped charge is a term of art for a device that when detonated generates a focused explosive output. This is achieved in part by the geometry of the explosive in conjunction with an adjacent liner. When the explosive detonates the liner metal is compressed into a super-heated, super pressurized jet that can penetrate metal, concrete, and rock.
Implementation Method 2
A shaped charge includes a metal case that contains an explosive material with a concave shape. When the explosive detonates the liner metal is compressed into a super-heated, super pressurized jet
Implementation Method 3
The detonating cord is comprised of material that explodes upon ignition. The energy of the exploding detonating cord can ignite shaped charges that are properly placed proximate to the detonating cord.
Data Source
AI summary
An apparatus and method for locking a detonating cord against a shaped charge.