Media / Product and service news / The new computerised drill rig - ROC D7 C

The new computerised drill rig - ROC D7 C

2002-03-19

A drill rig that can drill the holes by itself! Atlas Copco is delighted to launch the ROC D7 C, a new computerised surface crawler that drills truly straight holes, fast and accurately. It features a system that adds rods into the drill string automatically, thus increasing production capacity by a full 10-15%. Just set the hole depth and the automatic feed alignment, and initiate drilling. The ROC D7 C takes over and finishes the hole on its own.<BR> <BR> And then there’s the ROC Manager -- unique software for monitoring and optimising the drilling operation. Design drill plans in the office and send them to the rig. Log deviation and other key data while drilling and analyse the results back in the office.

By injecting smart engineering and modern computer intelligence into the well-proven muscle of the ROC D7, equipped with the COP 1800-series hydraulic top hammers, Atlas Copco adds a completely new dimension to drilling. Thanks to RCS, the Rig Control System, which has been successfully used on Atlas Copco’s recent series of underground drilling rigs, the ROC D7 C senses all variations in rock conditions, thereby adjusting all drilling functions to achieve smooth and accurate drilling with a minimum consumption of rock drilling tools. The ROC D7 C is intended for 2 ½”- 4 ½” (64 –115 mm) blast hole drilling in quarries and various civil engineering jobs.

Entering the ergonomically designed cabin you immediately notice the comfort, the visibility and the conveniently placed controls and monitors. There are no hydraulics inside the cabin, and all gauges and instruments are replaced by a colour display unit.
”When a rig leaves the factory, it’s not only filled with oil and water”, explains Lennart Lundin, Product Manager, ”it’s also powered by a lot of intelligence, making life easier both for operators and maintenance engineers. After a few hours of training the operator can reach maximum drilling performance. Rods are automatically added into the drill string to a predetermined depth allowing the driller to carry out other activities while drilling. As drilling can continue during lunch breaks and between shifts, the net result is 10 to 15% more rig utilisation. Thanks to the modular design, the system can be upgraded with optional automatics and electronics.”

The functions feel the rock
The RPCF (Rotation, Pressure Control of Feed Force) means that optimum hole penetration is achieved continuously and automatically, as the system takes advantage of any changes in rotation resistance without jeopardising life of the drill string. The changes in rotation resistance also control the impact pressure with a special function. At excessive rotation resistance the improved two-stage anti-jamming system is activated. The risk of jamming drill rods is virtually eliminated. One key difference between RCS and a conventional hydraulic control system is the smooth ramp-up that occurs between the end of collaring and the start of drilling.

Designed for service
By introducing RCS, Atlas Copco paves the way for easier maintenance and repair jobs. Trouble-shooting is facilitated by the built-in self-diagnostic system.
The reduction of hydraulic hoses, components and valve blocks reduces the risk of hydraulic fluid polluting the environment. Usage of common components and systems for both underground and surface drilling equipment offers both Atlas Copco and their customers important future synergies in logistics and training.

Successful test drilling
Encouraged by positive response at three work sites in Sweden comprising trenching and production of crushed rock aggregate, we decided to launch the ROC D7 C at Con Agg 2002 says David Shellhammer, Marketing Manager of Surface Drilling Equipment, quoting some of the comments made by the pioneers:

”a working a day with the RCS rig saves a lot of energy for my spare time”
”automatic rod handling gives me ample time to regrind the bits and mark my holes”
” the logical and ergonomic operator controls are kind to my arms and shoulders”
” feed alignment is made by just pushing a button”
”as holes were drilled straight and to the predetermined angle and depth, the fragmentation was exceptional—no need for secondary breaking”

First rig sold to NCC
NCC Roads, a division of the Swedish based construction group, NCC, has decided to purchase the first ROC D7 C, now on display in Las Vegas. The division specialises in drilling and blasting and operates mainly in the northern part of Sweden.
Their current drilling equipment fleet comprises 10 Atlas Copco rigs.
”By covering all three drilling methods Atlas Copco is offering, we have gained a definite competitive advantage” explains Åke Forsgärde, Production Manager at NCC Roads. ”All methods have their merits, mainly in relation to hole diameter. Above 127 mm we use DTH, and below 89 mm, tophammer. COPROD has a definite advantage in the hole range in between. From the various options Atlas Copco offers together with the ROC D7 C, I expect a lot of benefits from the ROC manager and the continuos monitoring of hole deflection.
This will enable us to design drill patterns, log the hole deviation data and analyse the results on a PC or laptop while drilling. As a result we will gain a lot of useful information when planning and scheduling for future assignments. In summary we expect higher rig utilisation and better control of the entire drill and blast operations resulting in better overall economy.”

Photo number. 203386
Picture caption:
The ROC D7 C – the new computerised drill rig combining power with intelligence.

Photo number: 203387
Picture caption:
The excellent visibility over the collaring spot. There's even a window in the top, which
allows you to follow the rock drill all the way down. The new cabin layout is ergonomic and
user-friendly. The cabin overall has become a comfort zone!

Photo number: 203388
Picture caption:
The data from a bore hole probe can be transferred to and displayed on a computer.



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