IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0575852
(2009-10-08)
|
| 등록번호 |
US-8235140
(2012-08-07)
|
|
발명자
/ 주소 |
- Wideman, Thomas W.
- Potter, Jared M.
- Dreesen, Donald
- Potter, Robert M.
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
3 인용 특허 :
51 |
초록
▼
Methods and apparatus for spalling a material, for example to thermally drill a wellhole, are provided. Such methods may include directing a fluid having a temperature greater than about 500° C. above the ambient temperature of the material and less than about the temperature of the brittle-ductile
Methods and apparatus for spalling a material, for example to thermally drill a wellhole, are provided. Such methods may include directing a fluid having a temperature greater than about 500° C. above the ambient temperature of the material and less than about the temperature of the brittle-ductile transition temperature of the material to a target location on the surface of the material, wherein the fluid produces a heat flux of about 0.1 to about 50 MW/m2 at an interface between the fluid and the target location, and thereby creating spalls of the material.
대표청구항
▼
1. A method of spalling a material, comprising: directing a fluid having a temperature greater than about 500° C. above the ambient temperature of the material and less than about the temperature of the brittle-ductile transition temperature of the material to a target location on the surface of the
1. A method of spalling a material, comprising: directing a fluid having a temperature greater than about 500° C. above the ambient temperature of the material and less than about the temperature of the brittle-ductile transition temperature of the material to a target location on the surface of the material; wherein the fluid produces a heat flux of about 0.1 to about 50 MW/m2 at an interface between the fluid and the target location, and thereby creating spalls of the material. 2. The method of claim 1, wherein the fluid has a temperature greater than about 600° C. 3. The method of claim 1, wherein the fluid has a temperature less than about 900° C. 4. The method of claim 1, wherein the method further includes providing a spallation system comprising at least one nozzle. 5. The method of claim 4, wherein the fluid is directed through the at least one nozzle to the target location. 6. The method of claim 1, wherein the fluid produces a heat flux of about 1 to about 20 MW/m2 at an interface between the fluid and the target location. 7. The method of claim 1, wherein the fluid is directed through one nozzle. 8. The method of claim 7, wherein the nozzle is adapted to direct the heated fluid from the drilling system substantially along an elongate central axis of the drilling system. 9. The method of claim 7, comprising directing the fluid from the at least one nozzle in a cyclically pulsing flow. 10. The method of claim 7, comprising directing the fluid from the at least one nozzle in a substantially continuous flow. 11. The method of claim 1, further comprising selecting the fluid to have a specified value of a parameter selected from the group consisting of a temperature, a heat flux, an exciting jet velocity, a heat capacity, a heat transfer coefficient, a Reynolds number, a Nusselt number, a density, a viscosity, and a mass flow rate. 12. The method of claim 11, wherein the fluid has an exiting jet velocity of about 400 to about 700 m/s. 13. The method of claim 11, wherein the fluid has a heat capacity of about 2.26 to about 3 kJ/kg·K. 14. The method of claim 11, wherein the fluid has a heat transfer coefficient of about 38 to about 56 kW/m2·K. 15. The method of claim 11, wherein the directed fluid has a Reynolds number of about 0.5×106 to about 60×106. 16. The method of claim 11, wherein the directed fluid has Nusselt number of about 30 to about 45 or about 740 to about 1040. 17. The method of claim 11, wherein the fluid has a density of about 0.01 to about 0.1 g/cm3. 18. The method of claim 11, wherein the fluid has a viscosity of about 0.025 to about 0.045 cP. 19. The method of claim 1, further comprising monitoring at least one property of the spalls. 20. The method of claim 19, wherein the spall size and/or shape is monitored. 21. The method of claim 19, further comprising adjusting the fluid temperature and/or heat flux to maintain a pre-determined spall size. 22. The method of claim 19, further comprising adjusting at least one parameter of the method in response to a change in the at least one of a property of the spalls, a hole diameter, a rate of penetration, and a standoff distance. 23. The method of claim 1, further comprising monitoring the fluid after the fluid is in contact with the material and/or after spalls have formed. 24. The method of claim 1, wherein the fluid comprises water. 25. The method of claim 1, wherein the material is rock. 26. A method for excavation of a borehole in a geological formation, comprising: using a thermal drilling system to create a pilot borehole in a geological formation;measuring at least one property of the geology of the pilot borehole;evaluating the at least one measured property to determine whether to enlarge the pilot borehole, wherein the evaluating step comprises evaluating whether the geological formation is suitable for use as an injection or production borehole for at least one of a geothermal system, resource mining, excavation, or CO2 or nuclear sequestration or storage; andenlarging the pilot borehole if the at least one measured property meets a set requirement. 27. The method of claim 26, wherein the pilot borehole is enlarged by inserting at least one drilling system into the pilot borehole. 28. The method of claim 27, wherein the thermal drilling system is a spallation drilling system. 29. A method for excavation of a borehole in a geological formation, comprising: using a thermal drilling system to create a pilot borehole in a geological formation;measuring at least one property of the geology of the pilot borehole, wherein the property of the geology of the pilot borehole is evaluated by evaluating at least one property of a fluid exiting the borehole; evaluating the at least one measured property to determine whether to enlarge the pilot borehole; andenlarging the pilot borehole if the at least one measured property meets a set requirement. 30. The method of claim 29, wherein the fluid is at least one of a spallation fluid, a cooling fluid, and a drilling mud. 31. A method for excavation of a borehole in a geological formation, comprising: using a thermal drilling system to create a pilot borehole in a geological formation, wherein using a thermal spallation system comprises directing a fluid having a temperature greater than about 500° C. above the ambient temperature of the rock and less than about the temperature of the brittle-ductile transition temperature of the rock to a target location on the surface of the rock; wherein the fluid produces a heat flux of about 0.1 to about 20 MW/m2 at an interface between the fluid and the target location;measuring at least one property of the geology of the pilot borehole;evaluating the at least one measured property to determine whether to enlarge the pilot borehole; andenlarging the pilot borehole if the at least one measured property meets a set requirement.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.