Perforating Gun Shaped Charge Carrier Orientation
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Solution Overview
Problem
Existing perforating gun systems face challenges in orienting shaped charges for optimal perforating direction and ensuring appropriate distance from the target formation, which affects the efficiency and effectiveness of cement squeeze operations in wellbore annuli.
Innovation Solution
A shaped charge carrier system that includes a jacket with a retention latch to secure shaped charges and a key that fits into an orientation slot for precise positioning, allowing for overlapping of shaped charges along the perforating gun length and adjustable standoff from the target formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If shaped charges are arranged in a helical configuration for 360-degree access, then cement squeeze coverage is improved, but the precision of shaped charge orientation and standoff distance control deteriorates
Solution Approach 1:
The shaped charge carrier is divided into multiple segments or stations along its length, with each station holding individual shaped charges in precise orientations. This segmentation allows each charge to be independently positioned and oriented, maintaining precision while enabling 360-degree coverage through the helical arrangement of multiple stations.
Solution Approach 2:
The shaped charges are pre-positioned and pre-oriented within the carrier before deployment into the wellbore. The carrier itself is designed with built-in orientation features and standoff control mechanisms, so that when deployed, the charges are already in their correct positions and orientations without requiring complex in-situ adjustment.
2Reliability
If shaped charges are individually protected against wellbore environment, then reliability is improved, but device complexity increases
Solution Approach 1:
Multiple protective functions are merged into a single integrated carrier structure. The carrier provides simultaneous protection against wellbore environment, maintains shaped charge orientation, controls standoff distance, and enables 360-degree access. This consolidation reduces the number of separate components while maintaining all necessary protective and functional capabilities.
Solution Approach 2:
The shaped charge carrier is designed as a multi-functional component that simultaneously performs protection, orientation, positioning, and deployment functions. This universal design eliminates the need for separate individual protection components for each shaped charge, reducing overall device complexity while maintaining reliability.
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 enables 360-degree access for cement squeeze operations, optimizes the placement of shaped charges for enhanced perforation efficiency, and ensures secure retention of shaped charges within the carrier system.
Implementation Method 1
The perforating guns carry explosive charges, i.e., 'shaped charges', into a wellbore that has been drilled into the hydrocarbon formation. The shaped charges detonate, and an explosive jet formed by each shaped charge may perforate one or more of a structure surrounding the shaped charge or perforating gun within the wellbore, a layer of cement surrounding the wellbore, and the hydrocarbon formation.
Implementation Method 2
The shaped charges detonate, and an explosive jet formed by each shaped charge may perforate one or more of a structure surrounding the shaped charge or perforating gun within the wellbore
Data Source
AI summary
A jacket may include a back wall, a top wall, a bottom wall, a first sidewall, a second sidewall, an open front portion opposite the back wall portion, an internal cavity configured to receive the shaped charge via the open front portion, a key configured to be received within one of a plurality of orientation slots formed in a shaped charge carrier; and a retention latch extending from an internal surface of at least one of the top wall, the bottom wall, the first sidewall or the second sidewall. The retention latch may extend toward the internal cavity and is configured to secure the shaped charge within the internal cavity.