Annular Piston Pile Driver for Compact Geothermal Drilling
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Solution Overview
Problem
Existing geothermal drilling methods are costly, require large equipment, and are limited by high drilling forces and the need for extensive boreholes, restricting the availability and efficiency of geothermal energy generation.
Innovation Solution
An annular piston pile driver system with an inner and outer cylinder forming an annular space, utilizing a piston to translate within this space, driven by a fluid source, allowing for efficient drilling with reduced rotational and linear forces, and enabling self-contained operation underground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional drilling systems are used, then drilling capability is achieved, but equipment size and cost increase significantly
Solution Approach 1:
The drilling system is divided into modular components: a compact annular piston assembly, a drill string with drill bit, and a fluid injection system. This segmentation allows the drilling function to be achieved with smaller, more manageable equipment pieces rather than one large monolithic system.
Solution Approach 2:
The system uses hydraulic fluid injection through the drill string to soften and remove subsurface material. By replacing traditional mechanical crushing forces with hydraulic fluid pressure, the equipment size is dramatically reduced while maintaining effective drilling capability.
2Force
If large drilling forces are applied, then drilling penetration is achieved, but borehole over-pressurization occurs
Solution Approach 1:
Hydraulic fluid is injected through the drill string at controlled pressures to soften subsurface material. This allows drilling penetration without applying excessive mechanical forces that would over-pressurize the borehole, as the fluid pressure can be precisely regulated and distributed along the drill path.
Solution Approach 2:
The system changes the drilling mechanism from high-force mechanical impact to controlled hydraulic pressure application. By adjusting fluid pressure parameters rather than mechanical force parameters, the system achieves drilling penetration while maintaining borehole pressure within safe limits.
3Length of stationary object
If traditional drill strings are used, then drilling depth is achieved, but equipment complexity and cost increase
Solution Approach 1:
The drill string serves multiple functions: it transmits rotational motion to the drill bit, provides a pathway for hydraulic fluid injection, and acts as a structural support. This multi-functionality reduces the need for separate specialized components, simplifying the overall system while achieving greater drilling depths.
Solution Approach 2:
The drill string is designed as a hydraulic conduit that delivers pressurized fluid to the drill bit and surrounding formation. This hydraulic integration simplifies the drill string design compared to traditional systems that require separate fluid delivery mechanisms, reducing overall equipment complexity.
4Ease of manufacture
If extensive surface equipment is deployed, then drilling operation is performed, but installation location flexibility is reduced
Solution Approach 1:
The entire drilling operation is consolidated into a compact system that can be deployed in confined spaces. Hydraulic fluid delivery allows the drill bit to receive power and cooling without requiring large surface-based mechanical drive systems, enabling installation in locations with limited surface access or space constraints.
Solution Approach 2:
The drilling system is segmented into compact, transportable modules that can be assembled at the installation site. This modular approach allows the system to be deployed in locations where large fixed drilling rigs cannot be installed, significantly increasing location flexibility while maintaining full drilling operation capability.
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 system reduces drilling costs and equipment size, allows for flexible drilling orientations, and expands the locations suitable for geothermal energy extraction by minimizing the need for large, surface-based machinery.
Implementation Method 1
a fluid source in fluid communication with the annular space and the piston head
Data Source
AI summary
An annular piston pile driver for use with a fluid jet drill system for boring holes in both residential and non-residential areas for geothermal energy shafts. The annular piston pile driver having an inner cylinder, an outer cylinder, a piston, a driver coupling, an upper sealing component, and a lower sealing component. The outer cylinder circumscribing the inner cylinder such that the inner cylinder and the outer cylinder form an annular space therebetween. The piston comprising a piston shaft and a piston head, wherein the piston is disposed within the annular space and configured to travel along an axis.