ROP and reliability
Geothermal and water-well drilling are all about speed and durability. The hammer must operate with a high rate of penetration (ROP), while being robust enough for you to drill all the way down to the required depth without interruption. Because, at the end of the day, it’s how many holes you’ve drilled that matters.
Understanding your challenges
We listened to several geothermal professionals describing their challenges. As a result, the upgraded COP W4 2.0 hammer is powerful enough to efficiently penetrate even very deep or water-filled holes, and its bit durable enough to last up to 400 meters in one go. Because we know how important it is for anyone working with geothermal or water-well drilling.
More than a facelift
We increased the airflow of the hammer to maximize its impact energy. We redesigned the bit to cope with the increased impact energy. We strengthened the steel of the casing to extend the hammer’s lifetime. Just to name of few improvements. The upgraded hammer lends its name, COP W4 2.0, to the software world. Just to emphasize that it’s more than a facelift – it’s a new way of working.
We went back to the drawing board when upgrading the existing COP W4. The result? The new COP W4 2.0 HF, with an airflow of 470 liters/s at 35 bar working pressure (505 l/s with cooler) – and the power to penetrate deep and water-filled holes. If you’re opting for the lowest fuel consumption in the market, the classic 420 l/s version comes upgraded as COP W4 2.0 LF, with the same 20 percent increase in wear resistance as the high-flow version.
Our new down-the-hole (DTH) bits are completely redesigned to maximize ROP and durability. The bit’s body is made of a harder and tougher grade of steel. A special heat treatment enhances the bit’s wear resistance and lifetime. The buttons – including innovative Trubbnos – are Enduro Extra treated to further extend the intervals between re-grinds.
The internal parts of the hammer last longer than those in contact with the rock. The faster-wearing external parts can be easily replaced. With our economy kit, or E-kit, your COP W4 2.0 hammer can be rebuilt 1–3 times, with little or no loss in productivity. A clever way to costeffectively sustain the productivity of your hammers.
Averaging 60 meters per hour
With a large compressor and 35 bar working pressure, it drilled 60 meters per hour on average, using 1.9–2.0 liters of diesel per meter. With a smaller compressor, at 25 bar pressure, 40–45 meters per hour were drilled with a diesel consumption of 1.5–1.6 liters per meter – a reduction of 0.8–1.0 liters per three-meter rod compared to the reference equipment.
Fuel costs in focus
Almost all geothermal contractors said they prioritize reducing diesel consumption over meters drilled per hour, as their fuel costs were reportedly higher than their drillers’ salary costs. They were therefore very pleased with the vastly improved energy efficiency of
the newer hammer.
Overall experiences can be summarized as: “Drillers simply want no other hammer”, as they reported the hammer is energy efficient, robust, easy to adjust to the rock type and requires little monitoring.
* for 115 mm diameter bit