Multi-stage liquid nitrogen fracturing system and method for hot dry rock geothermal well
A well liquid nitrogen, hot dry rock technology, applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems of large scale, long fracturing period of hot dry rock reservoirs, excessive consumption of water resources, etc.
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[0032] The present invention will be further described below in conjunction with accompanying drawing.
[0033] Such as figure 1 As shown, a liquid nitrogen multistage fracturing system for hot dry rock geothermal wells includes a nitrogen pressurization system, a liquid nitrogen injection system, a total nitrogen input pipeline 32, a total liquid nitrogen discharge pipeline 33 and at least three high-pressure liquid nitrogen container;
[0034] The upper ends of the three high-pressure liquid nitrogen containers are provided with a nitrogen gas inlet pipeline 34 and a vent pipeline 35, and the lower ends are equipped with a liquid nitrogen outlet pipeline 36 and a liquid nitrogen inlet pipeline 37. The three high-pressure liquid nitrogen containers are respectively These are high-pressure liquid nitrogen container A6, high-pressure liquid nitrogen container B7 and high-pressure liquid nitrogen container C8. The nitrogen inlet pipeline 34 and the liquid nitrogen outlet pipel...
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