Variable Penetration Perforating Gun with Targeted Jet Resistance
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Solution Overview
Problem
Conventional shaped charge perforating guns produce perforations with uniform depth and entry hole dimensions, which is not suitable for operations requiring variable penetration profiles in hydrocarbon-bearing subterranean formations.
Innovation Solution
A perforating gun apparatus with a carrier gun body featuring multiple jet target regions of varying resistance, where different sets of shaped charges are oriented to create perforations with distinct penetration profiles by aligning discharge ends with recesses of different depths, thicknesses, or materials, allowing for variable penetration profiles upon detonation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional closed fluid-tight hollow carrier gun body is used with uniform jet target regions, then the structural integrity and simplicity are maintained, but all perforations produce substantially the same depth and entry hole dimensions
Solution Approach 1:
The patent applies local quality by creating jet target regions with different local properties (resistance to jet penetration) at different locations on the carrier gun body. Specifically, the gun body includes first jet target regions with a first resistance and second jet target regions with a second resistance, allowing different perforations to have different penetration profiles while maintaining a single integrated carrier gun body structure.
2Length of moving object
If scallops or radially reduced sections are added to the carrier gun body to reduce resistance, then jet penetration depth increases, but the alignment between scallops and shaped charges must be precisely maintained
Solution Approach 1:
The patent applies preliminary action by pre-configuring the carrier gun body with jet target regions that have different resistances to jet penetration before deployment. The first and second jet target regions are预先 designed with specific resistance characteristics, eliminating the need for precise alignment adjustments during operation and simplifying the manufacturing process while ensuring consistent performance.
3Adaptability or versatility
If multiple sets of shaped charges with different orientations are used, then variable penetration profiles are achieved, but the charge holder and shaped charge arrangement complexity increases
Solution Approach 1:
The patent applies local quality by orienting different sets of shaped charges according to their respective jet target region requirements. The charge holder is configured to position first shaped charges for first jet target regions and second shaped charges for second jet target regions, with each set oriented to create the desired penetration profile for its corresponding region.
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 generation of perforations with varying depths and entry hole diameters, accommodating specific operational needs by adjusting the resistance experienced by the explosive jets, thereby enhancing the flexibility and effectiveness of perforation processes in subterranean well completion.
Implementation Method 1
A plurality of shaped charges is supported by the charge holder. A first set of shaped charges is oriented to have discharge ends aligned with the first set of the jet target regions and a second set of shaped charges is oriented to have discharge ends aligned with the second set of the jet target regions
Implementation Method 2
firing the first set of shaped charges creates perforations having a first penetration profile and firing the second set of shaped charges creates perforations having a second penetration profile
Data Source
AI summary
A perforating gun apparatus includes a carrier gun body having a plurality of jet target regions. A first set of the jet target regions has a first resistance to jet penetration and a second set of the jet target regions has a second resistance to jet penetration. A charge holder is positioned within the carrier gun body. A plurality of shaped charges is supported by the charge holder. A first set of the shaped charges is oriented to have discharge ends aligned with the first set of the jet target regions and a second set of the shaped charges is oriented to have discharge ends aligned with the second set of the jet target regions such that firing the first set of the shaped charges creates perforations having a first penetration profile and firing the second set of the shaped charges creates perforations having a second penetration profile.