Daldrup & Söhne Aktiengesellschaft, together with its subsidiaries, provides drilling and environmental services. It provides drilling services for near-surface geothermal energy, such as heat collectors and geothermal probes for heat or cooling; and drilling services for deep geothermal probes for heat recovery, as well as hydrothermal and petrothermal systems for electricity generation and heat recovery. The company also engages in the drilling of wells for the procurement of drinking water, service water, medicinal and mineral water, boiler-feed water, and cooling water, as well as thermal brine.