Ram Accelerator Drilling System for Hard Formation Penetration
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Solution Overview
Problem
Conventional drilling and excavation methods are slow, costly, and environmentally impactful due to tool wear, high operational costs, and the need for significant water supplies, especially in arid regions, and they often rely on mechanical drill bits that are inefficient in penetrating hard materials.
Innovation Solution
The use of a ram accelerator assembly to accelerate projectiles towards the geological formation, utilizing combustible propellants or electromagnetic systems to increase the rate of penetration by weakening the material before the drill bit, allowing for faster and more efficient drilling with reduced tool wear and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mechanical drill bits are used for drilling, then the drilling operation is simple and reliable, but the rate of penetration is slow and tool wear is high
Solution Approach 1:
The system performs preliminary action by accelerating projectiles to hypervelocity before they impact the formation, pre-weakening the material ahead of the drill bit. This preliminary mechanical disruption allows the drill bit to penetrate more easily, significantly increasing the rate of penetration and reducing drilling time compared to conventional mechanical drilling alone.
Solution Approach 2:
The invention replaces part of the mechanical drilling system with a hypervelocity projectile impact system. Instead of relying solely on mechanical cutting by the drill bit, the system uses accelerated projectiles to mechanically disrupt the formation ahead, substituting extreme-speed impact for gradual mechanical wear and cutting, thereby dramatically improving penetration rate.
2Ease of manufacture
If conventional drilling methods are used, then the equipment is simple and reliable, but operational costs are high due to tool wear and cycling
Solution Approach 1:
The drilling system is segmented into distinct functional components: a projectile acceleration system (ram accelerator or electromagnetic launcher), a drill bit system, and a material removal system. This segmentation allows each component to perform its specialized function optimally - the accelerator prepares the formation, the drill bit completes penetration, and material is removed efficiently - thereby improving overall drilling efficiency while maintaining operational simplicity.
Solution Approach 2:
The invention changes the velocity parameter of the projectiles from conventional drilling speeds to hypervelocity ranges. This parameter change fundamentally alters the interaction mechanism between the drilling system and the formation, transitioning from gradual mechanical cutting to instantaneous shock-induced fracturing, which dramatically improves drilling efficiency and reduces tool wear.
3Strength
If traditional drilling and blasting methods are used, then material can be broken apart, but safety burdens and operational costs increase
Solution Approach 1:
The system introduces an intermediary mechanism - hypervelocity projectiles - that mediates between the drilling system and the formation. Instead of directly using explosives that create uncontrolled blasts and safety hazards, the projectiles serve as a controlled intermediary that transfers energy precisely where needed, weakening the formation ahead of the drill bit without the harmful side effects of conventional blasting.
Solution Approach 2:
The invention replaces the chemical explosion system with a mechanical hypervelocity impact system. By substituting controlled mechanical impact at extreme velocities for chemical explosions, the system achieves comparable material breaking capability while eliminating the safety risks, regulatory burdens, and environmental hazards associated with explosive use.
4Ease of operation
If mechanical drill bits are used to penetrate hard materials, then the drilling process is straightforward, but the rate of penetration is slow and tool wear is significant
Solution Approach 1:
The system performs preliminary action by accelerating projectiles to hypervelocity before they impact the formation, pre-weakening the material ahead of the drill bit. This preliminary mechanical disruption allows the drill bit to penetrate more easily, significantly increasing the rate of penetration and reducing drilling time compared to conventional mechanical drilling alone.
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 significantly increases the rate of penetration by up to ten times, reduces tool wear, and minimizes environmental impact by using less water and energy, enabling deeper resource extraction and more efficient drilling operations.
Implementation Method 1
utilizing combustible propellants or electromagnetic systems to accelerate projectiles towards the geological formation
Implementation Method 2
utilizing combustible propellants or electromagnetic systems to accelerate projectiles towards the geological formation
Implementation Method 3
accelerate projectiles towards the geological formation... to weaken the material before the drill bit
Data Source
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AI summary
A drill string comprises a mechanical drill bit and a ram accelerator with a launch tube proximate to the mechanical drill bit. A projectile accelerated by the ram accelerator exits the mechanical drill bit through an orifice and impacts a geologic formation. The impact weakens a portion of the formation, enabling the drill bit to penetrate the weakened portion more easily. An endcap may be used to prevent outside material from entering the ram accelerator. The projectile may pass through or otherwise displace the endcap during operation. The launch tube may be positioned at an angle relative to the drill bit such that projectiles impact and weaken the formation on a particular side. Contact between the drill bit and the formation may direct the drill bit toward the weakened side, enabling the ram accelerator to be used to steer the drill bit.