EP1409870A4 - Systeme de generation d'energie geothermique - Google Patents

Systeme de generation d'energie geothermique

Info

Publication number
EP1409870A4
EP1409870A4 EP01957256A EP01957256A EP1409870A4 EP 1409870 A4 EP1409870 A4 EP 1409870A4 EP 01957256 A EP01957256 A EP 01957256A EP 01957256 A EP01957256 A EP 01957256A EP 1409870 A4 EP1409870 A4 EP 1409870A4
Authority
EP
European Patent Office
Prior art keywords
well bore
water
well
rock strata
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01957256A
Other languages
German (de)
English (en)
Other versions
EP1409870A1 (fr
Inventor
Albert H Halff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority claimed from PCT/US2001/023477 external-priority patent/WO2003012295A1/fr
Publication of EP1409870A1 publication Critical patent/EP1409870A1/fr
Publication of EP1409870A4 publication Critical patent/EP1409870A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Definitions

  • the present invention relates to a geothermal power generations system and more particularly to an improved geothermal power generation system in which the water in the hot rock strata is not used and water from an outside source is used and can be recycled.
  • Geothermal power generation systems have been used for years.
  • the usual system comprises drilling a well into a hot rock strata containing hot water. If the strata is dry and hot, then water may be pumped into the well and into the hot rock strata.
  • the hot rock strata either contains hot water or will heat the water that is pumped in until it reaches a temperature and pressure that exceeds the conditions necessary for the formation of steam.
  • the hot water flows or is pumped out of the well and when the pressure is released the hot water and steam are separated and the steam is used to operate a turbine that turns an electrical generator or some other mechanism.
  • the generator may be connected to a power grid for transport of the electricity to the point of use or the power may be used on site.
  • the ground water may require treatment before it is returned to the hot rock strata. It has been found that in current geothermal power generation systems the natural water or the water that is pumped into the hot rock strata is highly contaminated. The water is generally high in solids and may contain scaling or corrosive chemicals, or both and requires treatment before it can be returned to the hot rock strata. After the steam is used to turn a turbine and the steam condensed to its water phase, the resulting water is contaminated and requires treatment before passage through the piping and processing basins and before it can be returned to the hot rock strata.
  • the present invention overcomes these difficulties and has for one of its objects the provision of an improved geothermal generation system in which the water obtaining heat from the hot rock strata does not become contaminated so that it can be recycled, does not require chemical treatment beyond that used in standard boiler water treatment, and is economical in the amount of water used.
  • Another object of the present invention is the provision of an improved geothermal power generation system in which the turbine turning a generator or other mechanism that is to be powered by the steam needed not be located near the input well that is used to receive water into the ground and can be at a location remote from that well.
  • Another object of the present invention is the provision of an improved geothermal power generation system in which the system is more efficient.
  • Another object of the present invention is the provision of an improved geothermal power generation system in which the system is easy to install because the wells can be drilled by horizontal well drilling techniques in common use in the oil industry.
  • the improved geothermal power generation system is simple to use.
  • Another object of the present invention is that the system is maintained without withdrawing water from the strata so that the pressure in the strata is maintained.
  • Fig. 1 is a diagrammatic view of the geothermal power generation system using a
  • FIG. 2 is a diagrammatic view of the geothermal power system combining the inlet and outlet in a single well.
  • the geothermal power generation system of the present invention comprises an input well 1 which is sunk into the ground 2 through the surface 3 until it strikes the hot rock layer or strata 4 in the ground 2.
  • an output well 5 is also formed which penetrates the surface 3 and also extends into the hot rock strata 4.
  • the well is turned from vertical to horizontal 6 and is drilled through the hot rock strata 4 and when adequate distance for heating the water is reached, the well bore is turned to the vertical and drilled until it reaches the surface.
  • the input well 1, the horizontal well bore 6 ⁇ and the output well 5 form a continuous path from the surface, down to the hot rock strata, up through the overlying material and reaching the surface through well 5.
  • the well bore 6 is shown as being horizontal. However, it will be understood that the well bore 6 may have a different orientation if desired. As shown in the drawing, more than one horizontal well can be drilled from a single vertical well.
  • a generator turbine assembly 10 or some other mechanism that is to be operated by steam, is located near the output well 5 and is connected to the output well 5 so that steam leaving the output well 5 will operate
  • the generator turbine assembly 10 or similar mechanism to produce power or perform some other function.
  • the well bore 6 is lined and/or made of material that resists corrosion 7 so that the water/steam does not come into contact with the hot rock strata 4.
  • the wells 1 and 5 and the well bore 6 may be cemented in place in accordance with the standard oil and water well practice. Hence the water/steam remains clean and can be recycled after it operates the generator turbine assembly and no water is wasted.
  • the input well 1 and the output well 5 also lined with non-corrosive casing 8 and 9, respectively, and the casing cemented in place, so that when the water enters the input well 1 it does not come into contact with the ground rock 2 and is not contaminated and when the steam exits from the output well 5, it will not become contaminated since it will not come into contact with the ground rock 2.
  • the water/steam remains clean and can be recycled without danger of contamination.
  • the system of the present invention saves water since the water need not be discarded and saves the expensive treatment required if contaminated ground water is circulated through the system.
  • the present invention permits the output well 5 to be located at a place remote from the input well 1.
  • the outlet well 5 can be built close to the generator turbine assembly 10. If for some reason it is not feasible for the input well 1 to be located near the generator turbine assembly 10 it can be dug at a location remote from the input well 1 since the well bore 6 may be of any desired length provided that it mostly is located in the hot rock strata, and as a minimum, needs to be long enough to heat the water to steam, without adversely affecting efficiency and operation of the system of the present invention.
  • the present invention provides an improved geothermal power generation system in which the water entering the hot rock strata is not contaminated so that it can be recycled, in which the generator turbine or other mechanism that is powered by the steam need not be located near the input well that is used to receive water into the ground and can be at a location remote from that well, which will not waste water,
  • FIG. 2 A variation of the system described above is shown in Figure 2. All of the element of the System shown in Figure 1 are present. The same results are accomplished with a single vertical well and one or more horizontal wells. The water is returned to the horizontal reach of the well with a tubing that extends down the casing and discharges at the end of the casing. The water is converted to steam as it flows back out the single well and hence to the turbine.
  • the treated water may be at either end of the hot water let or distributed along all or part of the hot water leg.
  • hot legs there be one or more hot legs.
  • the hot legs may all operate at the same time or they may be used in sequence with one hot leg in operation while the other legs are heating up until the other legs are ready and are sequentially put into service.
  • the hot leg is shown as being level, but it may slope up or down. The slope may be changed in order to improve the position in the hot rock strata.
  • the hot leg may require cleaning at infrequent intervals. If required, the water inlet pipe is removed and a cleaning mechanism is run into or through the line. This loosens the objectionable material, which is usually scale. The debris can then be pushed out of the pipe

Landscapes

  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

Système de génération d'énergie géothermique comprenant un puits d'entrée (1) qui va de la surface (3) à la couche rocheuse sèche (4) et un puits de sortie (5), espacé du puits d'entrée qui va de la surface à la couche rocheuse sèche. Les puits d'entrée et de sortie pénètrent dans la couche rocheuse sèche. Un forage horizontal (6) relie les deux puits. Le forage, disposé dans la couche rocheuse sèche, est constitué d'un tubage isolé (8,9) ou d'un tubage avec un remblai entre le tubage et le trou. En variante, le système peut être constitué de seulement un puits vertical et d'un forage horizontal qui va dans la roche sèche ainsi que d'un tuyau qui refoule l'eau dans le forage horizontal.
EP01957256A 2001-07-25 2001-07-25 Systeme de generation d'energie geothermique Withdrawn EP1409870A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/023477 WO2003012295A1 (fr) 2000-05-12 2001-07-25 Systeme de generation d'energie geothermique

Publications (2)

Publication Number Publication Date
EP1409870A1 EP1409870A1 (fr) 2004-04-21
EP1409870A4 true EP1409870A4 (fr) 2004-10-20

Family

ID=21742732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01957256A Withdrawn EP1409870A4 (fr) 2001-07-25 2001-07-25 Systeme de generation d'energie geothermique

Country Status (5)

Country Link
EP (1) EP1409870A4 (fr)
JP (1) JP2004522071A (fr)
CA (1) CA2425480A1 (fr)
IS (1) IS6774A (fr)
PL (1) PL361021A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5413023B2 (ja) * 2009-07-28 2014-02-12 富士電機株式会社 地熱発電装置および地熱発電方法
KR20120090210A (ko) * 2011-02-07 2012-08-17 윤형대 지구의 수맥파 원리를 이용한 전동 발전 형식과 시공방법.
CN114542045A (zh) * 2015-09-24 2022-05-27 地热解决方案有限责任公司 地热热量采收机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470943A (en) * 1967-04-21 1969-10-07 Allen T Van Huisen Geothermal exchange system
US3864208A (en) * 1972-04-11 1975-02-04 Watase Kinichi Geothermal-nuclear waste disposal and conversion system
US5661977A (en) * 1995-06-07 1997-09-02 Shnell; James H. System for geothermal production of electricity
EP1048820A2 (fr) * 1999-04-29 2000-11-02 FlowTex Technologie GmbH & Co. KG Procédé pour l'exploitation de l'énergie géothermique et dispositif d'échange de chaleur à cet effet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470943A (en) * 1967-04-21 1969-10-07 Allen T Van Huisen Geothermal exchange system
US3864208A (en) * 1972-04-11 1975-02-04 Watase Kinichi Geothermal-nuclear waste disposal and conversion system
US5661977A (en) * 1995-06-07 1997-09-02 Shnell; James H. System for geothermal production of electricity
EP1048820A2 (fr) * 1999-04-29 2000-11-02 FlowTex Technologie GmbH & Co. KG Procédé pour l'exploitation de l'énergie géothermique et dispositif d'échange de chaleur à cet effet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03012295A1 *

Also Published As

Publication number Publication date
CA2425480A1 (fr) 2003-02-13
EP1409870A1 (fr) 2004-04-21
PL361021A1 (en) 2004-09-20
JP2004522071A (ja) 2004-07-22
IS6774A (is) 2003-04-10

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