Tracto-technik Gmbh & Co. Kg

Mhwirth Gmbh

Sebastian Leier

Franz-Josef Püttmann

Gerhard Völkel

Albrecht Heinrichs

Frank Prutti

Thomas Dolls

Achim Feldermann

The top drive comprises a gear unit, a main spindle, and an active pressure generating device. The gear unit comprises a gear housing, an axial main bearing, and an axial auxiliary bearing. The axial main bearing comprises an upper main bearing part with rotates relative to the lower main bearing part. The lower main bearing part contacts the gear housing. The axial auxiliary bearing comprises an upper auxiliary bearing part which rotates relative to the lower auxiliary bearing part and contacts the gear housing. The main spindle rotates within the gear unit and contacts the upper main bearing part. The active pressure generating device is arranged between the upper auxiliary bearing part and the gear housing, the lower auxiliary bearing part and the main spindle, the lower main bearing part and the gear housing, and/or the upper main bearing part and the main spindle.

Top drive for a drill string

A rod assembly driver which is alternately acting in two opposing directions includes two opposing grip jaws for a rod assembly, which grip jaws are hingedly connected to one another in the form of a parallelogram by pairs of plates.

Rod assembly driver

Growing community of inventors

Schmallenberg, Germany

Sebastian Leier