Extraction pipe installation for use in a geothermal probe for extracting geothermal energy and method for installing such an extraction pipe

摘要

The piping has an inner pipe (15) formed from a heat-insulating plastic i.e. polypropylene, and an outer pipe (16) made of metal i.e. steel. The outer pipe is provided separate from the inner pipe. The inner pipe is fixedly connected with the outer pipe in a region of ends of the piping. A thickened pipe shoe (17) is provided at an end of the outer pipe. An end of the inner pipe is fixedly connected with the pipe shoe by an adapter piece (18). A screw connection piece (21) includes a thread (22) for screwing with the pipe shoe, and an engaging region (23) for engaging in an end piece (19). An independent claim is also included for a method for installing an extraction piping in an outer borehole piping.