Geothermal well drilling well forming device and construction technology thereof

Abstract

The invention discloses a geothermal well drilling well forming device and a construction technology thereof. The geothermal well drilling well forming device comprises a drill bit sleeve, a drill bit assembly and a measuring and drilling hole assembly, wherein a drill bit cavity is dug in the end face of the drill bit sleeve, the drill bit assembly is installed in the drill bit cavity in a sliding mode, and the drill bit assembly slides in the radial direction relative to the drill bit sleeve, so that the drill bit assembly is shrunk when the device is recycled, and the situation that interference is generated between the drill bit assembly and a geothermal well support barrel is prevented; a side hole is dug in the side wall of the drill bit sleeve, the measuring and drilling hole assembly is installed in the side hole in a telescopic mode, and the outer side of the drill bit sleeve sleeves the geothermal well support barrel in the construction process, so that the geothermal well support barrel extends downwards along with the device to form a well, the situation that a well wall collapses in the well forming process is prevented, and the well forming efficiency is improved; through the arrangement of the measuring and drilling hole assembly, branch pipes can be conveniently formed on the side wall of a geothermal well, the geothermal conduction range is widened, and the utilization rate of geothermal energy is increased.

Description

technical field [0001] The invention belongs to the field of geothermal well drilling, and in particular relates to a geothermal well drilling device and a construction process thereof. Background technique [0002] As a renewable energy, geothermal energy has the advantages of wide distribution, low cost, easy exploitation, cleanness and direct utilization. Vigorously promoting the use of geothermal energy is an effective measure for resource conservation and environmental protection, and a way to achieve sustainable development of human society. At present, geothermal energy utilization technology is constantly developing and has become the best choice for building heating and cooling. [0003] During the excavation process of geothermal wells, the side wall of geothermal wells is prone to collapse, which is not conducive to the long-term use of geothermal wells. During the construction process, it is necessary to excavate the shaft of the geothermal well first, and then ...

AI Technical Summary

Problems solved by technology

[0003] During the excavation process of geothermal wells, the side wall of geothermal wells is prone to collapse, which is not conducive to the long-term use of geothermal wells. During the construction process, it is necessary to excavate the shaft of the geothermal well first, and then ground the shaft of the geothermal well Hot well support tube, and when the geothermal well support tube is set, it is also easy to cause the side wall of the geothermal well to collapse

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