A spallation drill head can include a drill head body having a primary face substantially oriented facing in a primary drilling direction along a longitudinal axis of the drill head body. A liquid inlet can be on the drill head body. The liquid inlet can be connected or connectable to a liquid supply line. An internal liquid connection can be oriented within the drill head body and fluidly connected to the liquid inlet. A plurality of liquid jets can be oriented on the primary face of the drill head. The liquid jets can be fed by the liquid inlet through the internal liquid connection. A mass flow controller can be associated with the liquid jets to control delivery of liquid by the liquid jet, and flowrates to at least two of the liquid jets can be independently controllable.
E21B 7/18 - Forage par action de jets de liquides ou de gaz, avec ou sans entraînement de grenaille
E21B 7/06 - Modification de la direction du trou de forage
E21B 36/00 - Aménagements pour le chauffage, le refroidissement ou l'isolation dans les trous de forage ou dans les puits, p. ex. pour être utilisés dans les zones de permagel
E21B 21/08 - Commande ou surveillance de la pression ou de l'écoulement du fluide de forage, p. ex. remplissage automatique des trous de forage, commande automatique de la pression au fond
E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
A spallation drill head (100) can include a drill head body (102) having a primary face (104) substantially oriented facing in a primary drilling direction (106) along a longitudinal axis of the drill head body (102). A liquid inlet can be on the drill head body (102). The liquid inlet can be connected or connectable to a liquid supply line (110). An internal liquid connection (112) can be oriented within the drill head body (102) and fluidly connected to the liquid inlet. A plurality of liquid jets (114) can be oriented on the primary face (104) of the drill head (100). The liquid jets (114) can be fed by the liquid inlet through the internal liquid connection (112). A mass flow controller (116) can be associated with the liquid jets (114) to control delivery of liquid by the liquid jet, and flowrates to at least two of the liquid jets (114) can be independently controllable.
A geothermal heat mining system can operate within a single primary borehole in a geothermal reservoir. A primary fluid loop can include a cold working fluid line leading into the primary borehole and a hot working fluid line coming out of the primary borehole. A secondary fluid loop can be located down the primary borehole, where the secondary fluid loop is in thermal contact with the geothermal reservoir and is entirely subsurface. A downhole heat mining device can control a rate of heat transfer from the secondary fluid loop to the primary fluid loop by selectively controlling fluid flow through the primary fluid loop, the secondary fluid loop, or both.
F24T 10/20 - Collecteurs géothermiques utilisant l’eau souterraine comme fluide vecteurCollecteurs géothermiques utilisant un fluide vecteur injecté directement dans le sol, p. ex. utilisant des puits d’injection et des puits de récupération
A geothermal heat mining system can operate within a single primary borehole in a geothermal reservoir. A primary fluid loop can include a cold working fluid line leading into the primary borehole and a hot working fluid line coming out of the primary borehole. A secondary fluid loop can be located down the primary borehole, where the secondary fluid loop is in thermal contact with the geothermal reservoir. A downhole heat mining device can control a rate of heat transfer from the secondary fluid loop to the primary fluid loop by selectively controlling fluid flow through the primary fluid loop, the secondary fluid loop, or both.
F24T 10/20 - Collecteurs géothermiques utilisant l’eau souterraine comme fluide vecteurCollecteurs géothermiques utilisant un fluide vecteur injecté directement dans le sol, p. ex. utilisant des puits d’injection et des puits de récupération
A geothermal heat mining system (100) can operate within a single primary borehole (110) in a geothermal reservoir (120). A primary fluid loop (130) can include a cold working fluid line (132) leading into the primary borehole (110) and a hot working fluid line (134) coming out of the primary borehole (110). A secondary fluid loop (140) can be located down the primary borehole (110), where the secondary fluid loop (140) is in thermal contact with the geothermal reservoir (120). A downhole heat mining device (150) can control a rate of heat transfer from the secondary fluid loop (140) to the primary fluid loop (110) by selectively controlling fluid flow through the primary fluid loop (110), the secondary fluid loop (140), or both.
F03G 7/04 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs utilisant les différences de pression ou les différences thermiques existant dans la nature
F24T 10/10 - Collecteurs géothermiques avec circulation des fluides vecteurs dans des conduits souterrains, les fluides vecteurs n’entrant pas en contact direct avec le sol
F24T 10/20 - Collecteurs géothermiques utilisant l’eau souterraine comme fluide vecteurCollecteurs géothermiques utilisant un fluide vecteur injecté directement dans le sol, p. ex. utilisant des puits d’injection et des puits de récupération
F24T 10/30 - Collecteurs géothermiques utilisant des réservoirs souterrains pour l’accumulation des fluides vecteurs ou des fluides intermédiaires
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