Bauer has developed a new Energy Efficiency Package (EEP), which is now offered as an option with the company’s rotary drilling rigs.
The EEP has been created within the framework of the TEAM research project to develop technology for energy-efficient mobile machines drives.
According to Bauer, before-and-after comparisons prove that up to 30% fuel savings are achieved in the winch operation of rotary drilling rigs and up to 20% savings are achieved in usual practice while drilling when using the EEP. The system is also said to provide significant noise reduction during operation. In addition, the independent operation of multiple functions allows easier handling of the drilling rig.
Bauer says it has re-engineered the drive system of the main winch of a rotary drilling rig. The new system now makes it possible to recover the energy released during the lowering of the tool. Therefore, the fuel consumption can be significantly reduced, especially when drilling deep boreholes.
The additional benefits of the system are said to include increased efficiency during lifting, higher speed and independent parallel operation of several functions (for example, main winch, feed, swivels and rotary drive).
The company says energy consumption by all ancillary devices, such as fan drives and pressure supply units, has been optimised. This reduces energy consumption and noise emissions.
The RPM of the diesel engine while operating the ancillary functions (for example, the auxiliary winch) or when in the stand-by mode has also been adjusted, making the machine quieter. A special hydraulic fluid with good viscosity over a wide temperature range is said to further increase efficiency.
To test the system’s practical applicability, a modified Bauer BG 30 PremiumLine rotary drilling rig was used in normal operation on a Bauer Spezialtiefbau construction site for several months. According to the company, the machine showed reliable operation with very high productivity and low fuel consumption.