Probe end piece changing flow direction in a ground heat extraction process comprises a U-shaped pipe bend joined to inflow and outflow pipes being sunk into a borehole

摘要

The probe end piece changing flow direction in a ground heat extraction process comprises a U-shaped pipe bend joined to inflow and outflow pipes (2, 3) being sunk into a borehole. The pipe bend zone is provided with a protective jacket (10) thickened in the direction of the borehole axis.