Said vibration movement (25) is transmitted to the movable pump chamber wall (5) and is converted into heat in the movable pump chamber wall (5).

The mobile pump was to be operated by the local fire department but owned by the Disaster Relief Service's specialist team for water damage/pump.

According to an embodiment, the pump (10) is a mobile pump which is mobile relative to the respective accumulators (11, 12) and which can be releasably connected thereto.

By means of the maintenance clamp (23), the complete movable pumping unit of the crude oil delivery pump (3) above the crude oil well (8) is kept above the surface (10) of the ground.

In the method, first of all a position of the at least one movable pump element (2) is determined by way of the at least one position encoder (6).

Mobile pumps serve for pumping beer and liquids of all kinds.