Radial Initiator Assemblies for Compact Perforating Gun Strings
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Solution Overview
Problem
Conventional perforating gun systems are limited by the length of their electrical switches, which restrict the number of guns that can be included in a tool string, thereby reducing the number of production zones that can be stimulated and hydrocarbon production.
Innovation Solution
The perforating gun systems incorporate initiator assemblies with electrical switches having a minimal axial length, allowing for a higher number of guns in the tool string by minimizing the overall axial length of the perforating gun.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional electrical switches are used in initiator assemblies, then the switch can perform its electrical function, but the axial length of the initiator assembly increases, limiting the number of guns that can be included in a tool string
Solution Approach 1:
The electrical switch is reoriented from a conventional axial configuration to a radial configuration. The switch now extends in the radial direction perpendicular to the central axis, rather than extending axially along the central axis. This dimensional change allows the switch to maintain its electrical functionality while dramatically reducing its axial footprint, enabling more guns to be packed into the same tool string length.
2Productivity
If more guns are included in the tool string to stimulate more production zones, then hydrocarbon production increases, but the tool string length exceeds conventional limits
Solution Approach 1:
By reorienting the electrical switch to extend radially rather than axially, the initiator assembly's axial length is reduced. This allows more guns to be sequentially arranged along the tool string within the same overall length constraint, thereby increasing the number of production zones that can be stimulated and maximizing hydrocarbon production without exceeding equipment length limits.
3Length of moving object
If the electrical switch is reconfigured to extend radially instead of axially, then the axial length of the initiator assembly is reduced, but the switch geometry becomes more complex
Solution Approach 1:
The electrical switch geometry is redesigned to extend in the radial direction from the central axis rather than axially along it. This reconfiguration maintains relatively simple switch internals while achieving the critical reduction in axial length. The radial orientation allows the switch to be integrated into the initiator assembly structure without requiring complex mounting mechanisms or intricate internal geometries.
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 configuration enables the stimulation of a greater number of production zones, potentially increasing hydrocarbon production without increasing the time and expense of wellbore completion.
Implementation Method 1
the initiator assembly is configured to detonate a detonator of the perforating gun system in response to receiving a firing signal
Data Source
AI summary
A perforating gun system includes an outer housing, a charge carrier assembly slidably receivable in the outer housing, wherein the charge carrier assembly includes a charge carrier having a central axis, a first endplate coupled to a first end of the charge carrier, and a second endplate coupled to a second end of the charge carrier, and an annular initiator assembly connectable to the charge carrier assembly, wherein the initiator assembly has a central opening whereby a central axis of the initiator assembly extends centrally through the central opening and parallel with the central axis of the charge carrier, wherein the initiator assembly is configured to detonate a detonator of the perforating gun system in response to receiving a firing signal.