Shaped Charge Frame Layout for Compact Directional Perforation
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Solution Overview
Problem
Existing perforation tools face challenges in accommodating large shaped charges while maintaining flexibility in ejection angle and ensuring electrical and ballistic continuity, particularly in tools with small diameters.
Innovation Solution
The development of perforation tools with frames that integrate large shaped charges, allowing for flexible indexing and orientation of ejection angles, while maintaining electrical and ballistic transfer through modular constructions with integrated electrical and ballistic communication pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger shaped charges are used to enhance perforation capability, then the perforation effectiveness is improved, but the tool diameter increases
Solution Approach 1:
The shaped charge is nested within a recess in the frame, with the ballistic pathway integrated into the frame structure. This nesting allows the large shaped charge to be contained within a compact tool diameter by utilizing the frame's internal volume efficiently, resolving the contradiction between charge size and tool size
Solution Approach 2:
The recess is positioned such that its wide end and narrow end are located at different radial positions relative to the longitudinal axis, effectively using three-dimensional space arrangement to accommodate large charges while maintaining a small tool outer diameter
2Area of stationary object
If the tool structure is made compact to reduce diameter, then the tool size is reduced, but flexibility in ejection angle selection is limited
Solution Approach 1:
The frame is designed with rotational capability around the longitudinal axis, allowing the recess and shaped charge to be oriented at different angles. This dynamic repositioning provides flexibility in selecting ejection directions while maintaining a compact tool structure, resolving the contradiction between small size and angular flexibility
Solution Approach 2:
The frame structure serves multiple functions: it contains the shaped charge, provides structural support, enables rotational movement for angle selection, and maintains electrical and ballistic continuity. This multi-functionality allows compact design without sacrificing operational flexibility
3Reliability
If electrical conductor is routed through the frame periphery, then electrical continuity is maintained, but the frame structure becomes more complex
Solution Approach 1:
The electrical conductor pathway is merged with the frame's structural design, routing the conductor through a passage that is integrated into the frame body rather than adding separate external wiring. This integration maintains electrical continuity while minimizing additional structural complexity
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
Enables the use of larger shaped charges in smaller tools, providing enhanced perforation capabilities with directional control and continuous electrical and ballistic connectivity, facilitating efficient resource recovery from formations.
Implementation Method 1
The tools generally have explosive charges shaped to project a jet of reaction products, including hot gases and molten metal, into the formation
Implementation Method 2
The tools generally have explosive charges shaped to project a jet of reaction products
Implementation Method 3
an electrical conductor connecting the first and second contacts
Implementation Method 4
a ballistic pathway coupling the detonator housing to the narrow end of the recess
Data Source
AI summary
A perforation tool features a container with a longitudinal axis; an initiator module in the container, the initiator module having a firing circuit, an electrical contact at the longitudinal axis, and a detonator housing; and a shaped charge frame in the container, the shaped charge frame having a first end; a second end opposite the first end; a recess for accepting a shaped charge between the first end and the second end, the recess having a wide end and a narrow end, wherein the longitudinal axis is between the wide end and the narrow end; a first electrical contact at the first end, the first electrical contact located at the longitudinal axis; a second electrical contact at the second end, the second electrical contact located at the longitudinal axis; an electrical conductor connecting the first and second contacts; and a ballistic pathway coupling the detonator housing to the narrow end of the recess.