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1. WO2020006620 - METHOD FOR FORMING HIGH EFFICIENCY GEOTHERMAL WELLBORES

Publication Number WO/2020/006620
Publication Date 09.01.2020
International Application No. PCT/CA2019/000076
International Filing Date 28.05.2019
IPC
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
33
Sealing or packing boreholes or wells
10
in the borehole
13
Methods or devices for cementing, for plugging holes, crevices, or the like
138
Plastering the borehole wall; Injecting into the formation
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
5
Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8
Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
50
Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
21
Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
30
Specific pattern of wells, e.g. optimizing the spacing of wells
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03
MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
G
SPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
4
Devices for producing mechanical power from geothermal energy
02
with direct fluid contact
[IPC code unknown for F24T 10/20]
[IPC code unknown for F24T 50]
E21B 33/138 (2006.01)
C09K 5/00 (2006.01)
C09K 8/50 (2006.01)
E21B 21/00 (2006.01)
E21B 43/30 (2006.01)
F03G 4/02 (2006.01)
CPC
C09K 8/08
C09K 8/40
C09K 8/424
C09K 8/46
E21B 33/138
E21B 43/305
Applicants
  • EAVOR TECHNOLOGIES INC. [CA/CA]; The Edison, Suite 2800, 150 9th Ave, S.W. Calgary, Alberta T2P 3H9, CA
Inventors
  • TOEWS, Matthew; CA
  • CAIRNS, Paul; CA
  • ANDREWS, Peter; CA
  • CURTIS-SMITH, Andrew; CA
  • HALE, Jonathan; CA
Agents
  • SHARPE, Paul; 24 Portadown Crescent Kanata, Ontario K2W 1E8, CA
Priority Data
62/693,95004.07.2018US
62/714,67404.08.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR FORMING HIGH EFFICIENCY GEOTHERMAL WELLBORES
(FR) PROCÉDÉ DE FORMATION DE PUITS DE FORAGE GÉOTHERMIQUES À HAUTE EFFICACITÉ
Abstract
(EN)
Wellbore synthesis techniques are disclosed suitable for use in geothermal applications. Embodiments are provided where open hole drilled wellbores are sealed while drilling to form an impervious layer at the wellbore/formation interface. The techniques may be chemical, thermal, mechanical, biological and are fully intended to irreversibly damage the formation in terms of the permeability thereof. With the permeability negated, the wellbore may be used to create a closed loop surface to surface geothermal well operable in the absence of well casing for maximizing thermal transfer to a circulating working fluid. Formulations for the working and drilling fluids are disclosed.
(FR)
L'invention concerne des techniques de synthèse de puits de forage appropriées pour une utilisation dans des applications géothermiques. Il est fourni des modes de réalisation selon lesquels des puits de forage percés dans un trou ouvert sont rendus étanches pendant le forage pour former une couche imperméable au niveau de l'interface de puits de forage/formation. Les techniques peuvent être chimiques, thermiques, mécaniques, biologiques et sont totalement destinées à endommager de manière irréversible la formation en termes de sa perméabilité. Une fois la perméabilité éliminée, le puits de forage peut être utilisé pour créer une surface en boucle fermée sur un puits géothermique de surface utilisable en l'absence de tubage de puits pour maximiser le transfert thermique vers un fluide actif en circulation. L'invention concerne également des formulations pour les fluides actif et de forage.
Latest bibliographic data on file with the International Bureau