Ram Accelerated Perforating Charges for Drilling Efficiency
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Solution Overview
Problem
Conventional drilling techniques face challenges in well control and efficiency when forming wellbores, particularly in dealing with high-pressure geological formations, as they often require separate systems for pressure control and material transport, leading to energy losses and complexity.
Innovation Solution
The use of perforating charges accelerated through a tubular string by drilling fluid and propellant materials, which can be detonated to erode geological material, utilizing a ram acceleration system that integrates with the drilling mud for pressure control and energy transfer, eliminating the need for separate conduits and improving drilling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate systems are used for pressure control and material transport in conventional drilling, then well control can be maintained, but energy losses increase and system complexity increases
Solution Approach 1:
The patent combines pressure control and material transport functions into a single integrated system. The drilling fluid serves dual purposes: it provides hydrostatic pressure for well control while simultaneously transporting cuttings and propelling the drill string to the wellbore bottom, eliminating the need for separate systems and reducing energy losses.
Solution Approach 2:
The drilling fluid is given multiple functions: it acts as a pressure control medium through its hydrostatic pressure, as a transport medium for cuttings, and as a propulsion medium for the drill string. This multi-functionality reduces system complexity and eliminates redundant energy consumption associated with separate systems.
2Reliability
If separate systems are used for pressure control and material transport in conventional drilling, then well control can be maintained, but device complexity increases
Solution Approach 1:
The patent merges pressure control and material transport into a single integrated system using drilling fluid. This eliminates the need for separate pressure control systems and material transport systems, significantly reducing device complexity while maintaining well control reliability.
Solution Approach 2:
The drilling fluid performs multiple functions simultaneously: pressure control, cuttings transport, and drill string propulsion. This multi-functionality consolidates what would otherwise require separate systems, reducing overall system complexity.
3Productivity
If conventional drilling methods are used, then wellbore formation can proceed, but drilling efficiency and steering capability are limited
Solution Approach 1:
The patent employs a flexible drill string that can dynamically adjust its configuration and steering angle in response to downhole conditions. This dynamic capability enables real-time wellbore steering and adaptation to geological variations, significantly improving both drilling efficiency and steering capability compared to rigid conventional systems.
Solution Approach 2:
The system allows for changes in drilling parameters such as fluid pressure, flow rate, and drill string configuration to optimize drilling efficiency and steering capability. By dynamically adjusting these parameters, the system can adapt to different geological conditions and maintain high productivity.
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 method enhances well pressure control, reduces energy losses, and increases drilling efficiency by using a single tubular string and drilling fluid to transport and accelerate perforating charges, allowing for deeper and more lateral wellbore formation with improved steering capability.
Implementation Method 1
a force generated by movement of the drilling fluid in the tubular string accelerates the perforating charge
Implementation Method 2
Drilling fluid may be pumped toward the bottom of a wellbore using a single tubular string
Implementation Method 3
detonating the detonable material to one or more of displace, stress, or fracture geologic material of a surface of the wellbore
Implementation Method 4
accelerated through a tubular string by drilling fluid and propellant materials, which can be detonated to erode geological material
Data Source
AI summary
A wellbore or other type of hole in a geologic formation or other material, such as concrete or other manmade structures, may be formed by accelerating perforating charges containing detonable material through a tubular string. Movement of a fluid, such as drilling mud, may be used to transport perforating charges to a bottom hole assembly. In the bottom hole assembly, a propellant material may be used to accelerate the perforating charges, such as by using a ram acceleration mechanism. The perforating charges may be shaped to at least partially penetrate a surface of the hole. Detonation of the perforating charge may displace, stress, or fracture the geologic material. Movement of the fluid may remove displaced geologic material and detonated material from the perforating charge from the hole.