REFRIGERATING STRAIGHT HOLE GUIDE

摘要

FIELD: underground well construction and operation, particularly in permafrost zones. ^ SUBSTANCE: refrigerating straight hole guide comprises cold generator, coaxial inner and outer pipes with heat-insulation shells connected with each other by means of annular lids arranged at ends thereof. Upper annular lid has orifices to receive coolant inlet and outlet pipes. Refrigerating straight hole guide additionally has guiding pipe with the first end lowered to lower annular lid and not supported by the lid. Upper end of guiding pipe is connected to cold generator. Lower end of guiding pipe has coolant flow swirler with designed deviation angle. ^ EFFECT: increased efficiency of well head zone treatment due to cold air (gas) flow directed in lower annular space part and distributed by jet swirl over annular bottom of straight hole guide along with following flow movement to outlet pipes and outer pipe wall cooling. ^ 1 dwg