Dual-Booster Power Charge Ignition Reliability
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Solution Overview
Problem
Conventional power charges used in downhole setting tools often fail to ignite properly when oriented incorrectly, leading to incomplete or delayed activation of setting tools due to the booster pellet being separated from the igniter, resulting in insufficient gas generation and tool activation failures.
Innovation Solution
A dual-booster power charge design featuring two booster charges positioned at opposite ends of a main power charge within a sleeve, ensuring that at least one booster charge is adjacent to the igniter, with each booster charge having a smaller initial dimension that expands to a larger size, preventing incorrect orientation and ensuring reliable ignition of the main propellant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single booster charge is used in conventional power charges, then the device complexity is reduced, but the reliability of ignition fails when oriented incorrectly
Solution Approach 1:
The power charge is segmented into multiple booster charges positioned at different locations (ends or sides) of the main power charge body. This segmentation ensures that regardless of orientation, at least one booster charge remains adjacent to the igniter, solving the reliability issue without requiring a completely new design approach
Solution Approach 2:
The booster charges are nested within the main power charge structure, positioned inside the sleeve and surrounded by the main propellant. This nested arrangement ensures proper spatial relationship between boosters and igniter while maintaining a compact, manageable overall structure
2Reliability
If the booster charge is separated from the igniter in incorrect orientation, then the manufacturing simplicity is maintained, but the gas generation becomes insufficient
Solution Approach 1:
The booster charges are pre-positioned at specific locations (ends or sides) of the main power charge body during manufacturing. This preliminary positioning ensures that when the power charge is installed, at least one booster charge will be adjacent to the igniter regardless of orientation, guaranteeing sufficient gas generation and reliable tool activation
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 dual-booster power charge design ensures that the booster charges are always adjacent to the igniter, preventing misorientation issues and ensuring consistent and complete ignition of the main propellant, thereby reliably activating downhole tools.
Implementation Method 1
Power charges are constructed of propellant mixtures composed of carefully controlled combustible elements containing an oxidizer, which, when ignited will begin a slow burn lasting approximately thirty seconds more or less. The gas derived from a burning power charge propellant mixture causes a setting tool to stroke
Data Source
AI summary
In one instance, a dual-booster power charge is disclosed for use in a downhole setting tool, wherein the dual-booster power charge has at least a first and a second booster charge disposed within a sleeve and embedded in a main power charge. Each booster charge has one end face that is exposed at the end of the dual-booster power charge. Each booster charge may have a first dimension near the end face that is smaller than a second dimension near the end of the booster charge that is not exposed. In some instances, the booster charges have a charge retention portion and a primary body portion, and a cross sectional diameter of the charge retention portion is larger than a cross sectional dimension of the primary body portion. Other dual-booster power charges and booster charges are disclosed.