Pressure-Restrictor Plate for Perforating Gun Deformation
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Solution Overview
Problem
Perforating guns used in well systems often structurally deform and become trapped in wellbores after detonation, rendering them inoperable and preventing access to hydrocarbon reservoirs.
Innovation Solution
A partially loaded perforating gun with a pressure-restrictor plate is introduced, which creates a pressure seal between the loaded and blank sections, preventing pressure waves from entering the blank section and thus preventing structural deformation upon detonation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a perforating gun is detonated to pierce the wellbore lining, then access to the hydrocarbon reservoir is achieved, but the perforating gun structurally deforms and becomes trapped in the wellbore
Solution Approach 1:
The perforating gun is divided into two distinct sections: a loaded section containing explosive charges and a blank section without charges. The pressure restrictor plate creates a pressure seal between these sections, isolating the pressure wave effects to only the loaded section during detonation, thereby preventing structural deformation of the entire gun assembly
Solution Approach 2:
A pressure restrictor plate is introduced as an intermediary component between the loaded and blank sections of the perforating gun. This plate with pressure sealing capability blocks the transmission of pressure waves from the loaded section to the blank section, preventing the pressure wave from causing structural deformation while still allowing the explosive charges to effectively pierce the wellbore lining
2Productivity
If the perforating gun is fully loaded with explosive charges, then piercing capability is maximized, but structural deformation and trapping in wellbore occurs
Solution Approach 1:
The perforating gun is segmented into loaded and blank sections, allowing the loaded section to maintain full piercing capability while the blank section remains structurally intact and undeformed, enabling potential gun recoverability after operation
Solution Approach 2:
Different sections of the perforating gun have different functional qualities: the loaded section is designed for explosive energy release and piercing, while the blank section is designed to maintain structural integrity. The pressure restrictor plate ensures that the harsh conditions (pressure waves, heat) are localized to the loaded section only, preserving the blank section for potential recovery
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 pressure-restrictor plate effectively prevents the perforating gun from collapsing or deforming, allowing for successful piercing of the wellbore lining and reestablishing access to hydrocarbon reservoirs without rendering the gun inoperable.
Implementation Method 1
The pressure-restrictor plate can create a pressure seal between the blank-gun section and the loaded-gun section of the partially loaded perforating gun
Data Source
AI summary
As assembly for a pressure-restrictor plate for a partially loaded perforating gun is provided. The assembly can include a charge tube positioned in a loaded-gun section of a partially loaded perforating gun. The assembly can also include a pressure-restrictor plate positioned in a blank-gun section of the partially loaded perforating gun and adjacent to the charge tube. The assembly can further include a rod for securing the pressure-restrictor plate in a position, the rod having a first end that is coupled to the pressure-restrictor plate and a second end that is coupled to an end plate positioned within the partially loaded perforating gun.