Shaped Charge Substance for Dynamic Pressure Control
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Solution Overview
Problem
Current shaped charge technologies face challenges in controlling dynamic pressure during detonation, which affects the balance of wellbores, leading to inefficient perforation and fluid flow in oil and gas production.
Innovation Solution
Incorporating or positioning a substance within or adjacent to the main explosive load of the shaped charge to modify the dynamic pressure and duration of the pressure pulse, allowing for controlled wellbore balance by adjusting the heat of explosion and pressure wave velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a shaped charge is used for perforation, then penetration capability is improved, but control over dynamic pressure and wellbore balance is insufficient
Solution Approach 1:
The patent applies parameter changes by incorporating substances with different thermal properties (heat of explosion) into the shaped charge main explosive load. By varying the proportion of these substances, the dynamic pressure and pressure pulse duration can be precisely adjusted to achieve balanced, over-balanced, or under-balanced wellbore conditions, thereby resolving the contradiction between maintaining penetration capability and gaining control over dynamic pressure parameters.
2Productivity
If dynamic pressure is increased to improve perforation efficiency, then penetration capability is improved, but wellbore balance control becomes difficult
Solution Approach 1:
The patent enables independent control of dynamic pressure and pressure pulse duration through parameter changes in the explosive composition. By adjusting the proportion of substances with different heats of explosion, operators can optimize perforation efficiency while simultaneously achieving the desired wellbore balance condition, thus resolving the contradiction between productivity and ease of operation.
3Adaptability or versatility
If a substance is added to modify dynamic pressure, then wellbore balance control is improved, but device complexity increases
Solution Approach 1:
The patent employs composite materials by combining substances with different thermal properties (such as high heat of explosion materials like aluminum powder with low heat of explosion materials like magnesium powder) into the main explosive load. This composite approach enables control over dynamic pressure and pressure pulse duration while maintaining a relatively simple single-stage shaped charge structure, thus resolving the contradiction between adaptability and device complexity.
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 approach enables precise control of wellbore balance, enhancing perforation efficiency and fluid flow by creating balanced, over-balanced, or under-balanced conditions, thereby improving oil and gas production.
Implementation Method 1
The dynamic pressure can be increased or decreased via the substance increasing or decreasing the heat of explosion of the main explosive load
Implementation Method 2
controlling the dynamic pressure created during detonation of a shaped charge
Data Source
AI summary
A method of controlling a dynamic pressure created during detonation of a shaped charge comprises: positioning the shaped charge in a wellbore, wherein the shaped charge comprises a main explosive load, wherein a substance is included in the main explosive load or is positioned adjacent to the main explosive load, wherein the substance increases or decreases the dynamic pressure or increases or decreases the duration of a pressure pulse created during detonation of the shaped charge; whereas a substantially identical shaped charge without the substance does not increase or decrease the dynamic pressure nor increase or decrease the duration of the pressure pulse during detonation. A method of controlling the balance of a portion of a wellbore comprises: positioning the shaped charge in the portion of the wellbore; and creating a desired balance in the portion of the wellbore.