Perforating Gun Loading Tube Electrical Circuit Integration
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Solution Overview
Problem
The existing wireline perforating gun systems face issues with wire pinching and shorting, which disrupt the electrical circuit necessary for detonating shaped charges, leading to reduced space for charges, increased loading time, and quality issues due to the presence of wires.
Innovation Solution
A loading tube is integrated into the perforating gun body, acting as part of the electrical circuit to initiate detonation, with insulation methods such as coatings, insulating materials, and stand-offs to prevent shorting, allowing for efficient electrical connection and insulation from the gun body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are used to connect the electrical circuit in wireline guns, then the electrical connection can be established, but the wires may get pinched or shorted during loading or transportation, resulting in open circuit or loss of isolation
Solution Approach 1:
The patent removes the vulnerable external wires from the system by integrating the electrical circuit directly into the gun body structure. The gun body itself serves as one conductor, eliminating the need for separate wire connections that can be pinched or shorted during handling and transportation.
Solution Approach 2:
The electrical circuit is merged with the gun body structure, where the gun body serves as an integral part of the electrical pathway. This integration ensures that the electrical connection remains reliable throughout loading and transportation without requiring separate wire components.
2Quantity of substance
If wires are used in the perforating gun, then electrical detonation can be achieved, but the wires decrease the space available for shaped charges
Solution Approach 1:
The patent extracts the wires from the gun interior, using the gun body itself as the electrical conductor. This removal of wire components maximizes the internal volume available for positioning shaped charges without compromising electrical connectivity.
3Productivity
If wires are used to activate electrical detonators, then detonation can be initiated, but the presence of wires increases the time required to load and replace the gun
Solution Approach 1:
The electrical circuit is combined with the gun body structure, creating an integrated system where the gun itself serves as the electrical pathway. This eliminates the time-consuming steps of wire installation and replacement during gun loading operations.
4Reliability
If the loading tube is insulated from the body, then shorting is prevented, but insulation methods require additional materials and processing
Solution Approach 1:
The patent employs thin insulating coatings or films applied to the loading tube or gun body interior surfaces. These thin protective layers provide effective electrical isolation between the loading tube and gun body while minimizing material usage and simplifying the manufacturing 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 solution eliminates the need for external wires, increasing the size of shaped charges, reducing loading time, and enhancing the reliability of perforating operations by ensuring consistent electrical initiation of detonation.
Implementation Method 1
the loading tube and body are insulated from one another
Implementation Method 2
The insulating material may, for example, be a shrink wrap type material or an adhesive tape type material
Implementation Method 3
the insulating material may comprise in-situ cured polymer tape or composite tape. These latter types of tapes may be wrapped onto the loading tube and then be cured under heat to become an integrated part of the loading tube
Data Source
AI summary
A loading tube for installation in the body of a perforating gun is disclosed. The loading tube holds a plurality of shaped charges whose detonation is electrically initiated, and the loading tube, when installed in the body, comprises at least a portion of the electrical circuit used to initiate detonation the shaped charge. In one embodiment, the loading tube comprises the hot portion of the electrical circuit, the body comprises the ground portion of the electrical circuit and the loading tube and the body are insulated from one another. Alternatively, the loading tube may comprise two distinct portions of conductive material which are electrically isolated from one another where the two portions of conductive material comprise the hot and ground portions of the electrical circuit. Additionally, a loading tube according to the present invention may comprise a conductor which is disposed in the loading tube near the outer surface of the loading tube and which is insulated from the loading tube. A system is disclosed comprising a loading tube having the aforesaid characteristics and a method is provided which utilizes the loading tube as a portion of the electrical circuit to initiate detonation of the charges.