Atlas Copco Secoroc has unveiled its latest innovation in rotary drilling – the Secoroc PARD system – which according to the group is designed to boost rotary drilling performance by combining the best of DTH and rotary drilling technology. It is targeted for use in large mines and quarries, where blast holes from 250mm-311mm are standard. There are two models currently available: Secoroc PARD 10 and Secoroc PARD 12 – as well as a comprehensive selection of Secoroc PARD tricone bits.

The new Secoroc PARD system combines “a unique, high frequency, low impact DTH hammer and a specially designed tricone drill bit” that are mounted onto a standard rotary drill rig and drill string. The result says Atlas Copco is a combination of percussive power and rotational force that provides significant increases in the rate of penetration (ROP). Case studies have shown ROP increases up to 50%.

The Secoroc PARD hammer is designed to operate on pressures from 50 to 110 psi, which is low compared to standard DTH hammers. Optimal air flow is achieved with the unique Secoroc PARD parallel air flow system, which distributes the air proportionately between the hammer and the tricone drill bit. The Secoroc PARD tricone bits can withstand the additional stresses and strains and still retain the same service lives of standard tricone bits, according to Atlas Copco.