Gyrotron Millimeter-Wave Drilling System for Deep Boreholes
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Solution Overview
Problem
Current rotary drilling methods are inefficient and costly for deep drilling beyond 25,000 feet, and hydraulic fracturing is limited by mechanical pumping technology and generates environmental pollution.
Innovation Solution
A system using millimeter-wave radiation energy from a gyrotron to drill and fracture subsurface formations by creating a thermal melt front and high-pressure gas to enhance penetration rates and reduce fluid volume, combined with a waveguide and pressurization apparatus for efficient energy transmission and fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional rotary drilling methods are used for deep drilling beyond 25,000 feet, then drilling can be performed with existing technology, but penetration rate is extremely slow and costs increase significantly
Solution Approach 1:
The patent replaces the mechanical rotary drilling system with an electromagnetic field-based system. A gyrotron generates millimeter-wave radiation that is transmitted through a waveguide to the borehole bottom, where it is converted to electromagnetic current that heats and melts the formation material, enabling rapid penetration without mechanical contact.
Solution Approach 2:
The patent utilizes phase transitions of formation material from solid to liquid (melting) and then to vapor (volatilization) through electromagnetic heating. The millimeter-wave energy heats the formation material to melting point, creating a molten state that flows away, and further heating causes volatilization, clearing the borehole path efficiently.
2Stress or pressure
If mechanical pumps are used for hydraulic fracturing, then fluid can be pumped to create fractures, but maximum pressure is limited by mechanical pumping technology
Solution Approach 1:
The patent replaces mechanical pumping systems with an electromagnetic field-based pressurization system. The gyrotron generates high-power millimeter-wave radiation that is converted to electromagnetic current in the formation fluid, heating it to extreme temperatures and converting it to high-pressure steam or supercritical fluid, achieving pressures unattainable by mechanical pumps.
Solution Approach 2:
The patent changes the physical state and parameters of the fracturing fluid through electromagnetic heating. Water or other fluids are heated from liquid to steam phase, and further to supercritical state, dramatically increasing pressure and energy density without mechanical compression, enabling fracturing of tighter and deeper formations.
3Productivity
If large volumes of fracturing fluid are used, then fractures can be created in subsurface formations, but environmental pollution and contamination of water sources occur
Solution Approach 1:
The patent replaces mechanical hydraulic fracturing with electromagnetic field-based fracturing. Instead of pumping large volumes of chemical-laden water, the gyrotron transmits millimeter-wave energy that is converted to electromagnetic current, heating and pressurizing a minimal amount of fluid or directly fracturing the formation through thermal stress and vaporization.
Solution Approach 2:
The patent uses phase transitions of the fracturing medium from liquid to vapor and supercritical states through electromagnetic heating. This eliminates the need for large volumes of liquid fracturing fluid, as the phase-changed material expands in situ to create fractures without requiring external pumping or chemical additives.
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 significantly increases deep drilling penetration rates by 10 to 100 times and reduces environmental impact by minimizing fluid usage and mechanical limitations, enabling access to deeper energy resources with reduced costs and pollution.
Implementation Method 1
a gyrotron for injecting millimeter-wave radiation energy into a borehole and pressurization apparatus for pressurizing the borehole such that a thermal melt front at the end of the borehole propagates into the subsurface formations
Implementation Method 2
The millimeter wave power is preferably provided by gyrotron technology... Gyrotron technology is a high power source of millimeter-wave radiation... these frequencies are 10 to 100 times higher than microwave frequencies
Implementation Method 3
heating and pressurizing a minimal amount of fluid or directly fracturing the formation through thermal stress and vaporization
Implementation Method 4
A waveguide is provided in the borehole to transmit the millimeter-wave beam... In one embodiment, the waveguide is corrugated with circumferential grooves having a spacing and depth dependent on the millimeter-wave energy wavelength
Implementation Method 5
pressurization apparatus for pressurizing the borehole such that a thermal melt front at the end of the borehole propagates into the subsurface formations
Data Source
AI summary
System for drilling boreholes into subsurface formations. A gyrotron injects millimeter-wave radiation energy into the borehole and pressurization apparatus is provided for pressurizing the borehole whereby a thermal melt front at the end of the borehole propagates into the subsurface formations. In another aspect, a system for fracturing a subsurface formation is disclosed.