Abstract: A coupling for interconnecting at least two pipes (1) of a geothermal heat exchanger system, including at least one female coupling part (2) and at least one male coupling part (3) that can be inserted therein, with at least one fluid seal (4) being provided between the coupling parts (2, 3) for sealing the coupling parts (2, 3), especially in a fluid-tight manner. At least one, preferably annular or cylindrical, reinforcing element (5) supports at least one of the two coupling parts (2, 3), preferably at least the female coupling part (2), so that the coupling part (2, 3) is not radially deformed, preferably not radially expanded, and is produced of a material or material composition different from that of the coupling part (2, 3).

Abstract: A system for configuring earth probes (1) for receiving thermal energy from the earth and/or for discharging thermal energy into the earth, including a conductor system having a feed and a return line, which are connected to each other at the lower end of the earth probe (1), the system including probe modules (11, 12), which each form a section (15, 16) of the feed and/or return line of the earth probe (1) and which can be connected to each other at least by a positive and/or non-positive connection, preferably a plug-in connection, and a base piece (13), which forms a section of the conductor system of the earth probe (1). The section connects the feed line to the return line, and can be connected to the probe modules (11, 12) via at least one positive and/or non-positive connection, preferably a plug-in connection.