Atlas Copco Exploration Products. Explorac reverse circulation rigs

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1 Atlas Copco Exploration Products Explorac reverse circulation rigs

2 Deep hole exploration with reverse circulation In many cases, exploration drillers have to modify various types of drill rigs in order to use them for reverse circulation (RC) drilling of deep exploration holes. Sometimes they are lucky and successful. Sometimes they are unlucky and fail. With the Atlas Copco Explorac, there is no need to rely on luck. With the Explorac, Atlas Copco is providing exploration drillers with the only RC drill rig on the market that is truly tailor made for the job. In the world of exploration, the technique of reverse circulation drilling continues to gain ground. It has proved to be the method of choice for obtaining consistently high quality rock samples with speed and efficiency. But if it means having to modify drilling rigs that are primarily designed for a different task such as water well drilling, the result is often impossible to predict. With the Explorac R50 and the Explorac 220RC, there is no element of risk involved. They are designed specifically for the job. And this means there is no longer any need to compromise on functionality or performance. The Explorac 220RC is designed and built according to specifications from exploration professionals. As a result, every component has been carefully selected and fine-tuned to give optimal results. The Explorac R50 is an extremely well proven rig purpose built for DTH drilling. 2

3 The right equipment for the task RC is a method in demand for use throughout the world. It is known for its cost structure, meter rate drilled, speed, maintained accuracy and sampling efficiency. There are several critical factors in the design and use of the Explorac rigs that combine to make this equipment efficient and profitable for the RC contractor. With its drill rods, sampling and all other systems on board, the Explorac is quick to set up and can be drilling within minutes of arrival at the site. non-productive tasks. The variable position sliding dumping mast can be positioned at any angle from 45 to 90 degrees and the slips table height can be adjusted up to 1m to allow easy access to the drillhole collar. In addition, an integrated cyclone and sample collection system allows continuous, dust-free sampling with little or no pause in the drilling process. Down-the-hole equipment that has been optimised to match the rig s air and hydraulics, is important in order to maintain low drilling costs. Fast hydraulics with user-friendly controls and hands-free handling means faster rod pulls and less time spent on other 3

4 The system for Professionals The package from Atlas Copco is a complete RC system, from the drill bit to the sample splitter. You avoid any loose ends in your system and can easily meet the continuous need for tools and consumables. Saver sub with replaceable inner tube. More than 20 years of experience in the design, manufacturing and use of down-the-hole equipment and sample systems, has led to an RC system that is both reliable and cost effective. Air switch. Drill mode with samples passing through the innertube on their way to the cyclone. Dual wall drill rod. The drill rods have been designed for maximum air flow while retaining a large diameter, high tensile steel inner tube that gives low wear and long life. The inner tubes have multiple seals to ensure no air losses. The rod thread profile provides maximum strength and tool joint stiffness, while still retaining operator friendliness. All adapters and specialised subs are available. The through the head system, overhead swivels and blowdown are all designed and built for optimum performance, low wear and easy maintenance. Blow down mode directing the air downwards in the inner tube to clean and prevent possible clogging of the system. Cross-over sub for use with conventional hammer. Digout sub for retraction of drillstring when stuck as a result of collapsing wall. The cyclone and splitter is an integrated proven design that gives unequalled performance in sample separation and collection. It is capable of accepting up to 950 litres per second and has hightech, easily replaceable ceramic wear components. This ensures minimum downtime and eliminates hang up and sample contamination. A two-door arrangement minimises the dust around the enclosed sample splitter and allows a sample to be held while another is being drilled. Illustration: Henry Lindberg RC hammer with samples passing through the hammer with replaceable sample tube. Bit shroud designed to maximize the cuttings flow to the bit face and to seal the hole while maintaining a dry pressurized zone around the bit. 4

5 Explorac 220RC Purpose built for all challenges Good news for water well drillers The Explorac rigs are not only important for minerals exploration, it is also the perfect solution for water well drilling. With just a few adjustments, the rigs can easily be adapted to meet demands for speed, efficiency and productivity as well as environmental care in water well drilling operations. Purpose built for profitable and safe drilling in all geological formations, With a quick and easy set up, the driller gets maximum time-on-bottom. The Explorac 220 rigs meet all the challenges of exploration with reverse circulation drilling. They are designed and built with real-world experience in the most demanding of RC conditions. Built on a proven chassi with four long travel hydraulic jacks and a dump mast, it also adapts well to any drill site. A strong, but lightweight box frame mast with heavy duty hydraulic cylinder and chain feed system, easily handles the continuous maximum load situations encountered in deephole RC drilling. The high torque rotary head has large, heavy duty tapered roller bearings to cope with hammer and rotary drilling. Integrated air and mud swivels and RC discharge systems are designed for long life and easy maintenance. An onboard high volume cyclone and sampling system gives good site access and quick set-up, maximizing production time. The engine canopy gives excellent access enabling the unit to be easily cleaned and maintained. The special design of the canopy makes a remarkable improvement to the work site. Running at full power, the noise level, measured from a distance of about 2 m, is just db. 5

6 Explorac 220RC Ergonomics and safety Explorac 220RC has been designed and built to set new standards in safety and ergonomics. It uses tried and proven systems in combination with new technology, making it the safest and most user-friendly rig of its type. The Explorac 220RC takes over much of the physical effort required from the driller. With the 1.5 ton winch, which positions directly over the hole, and the 1.5-ton handling winch on a slewing boom, Explorac 220RC handles all heavy lifting requirements. In addition, hands-free breakout and rod handling systems ensure rapid and safe handling of all drill string components. A special casing handling tool attached to the rotation head gives full safety and control. Explorac 220RC has a fully enclosed power pack and smart cooling fans reduce noise levels to industry best practice levels. All drilling operations are controlled from a remote control panel, and hands-free systems manage virtually all types of down-the-hole equipment. This means that the drilling crew spends much less time in potentially hazardous areas, which helps to make their working environment safer and healthier. The low emission engine which is designed to minimise the potential for hydrocarbon spills reduces the impact on the surrounding environment and gives lower running costs. 6

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8 Explorac 220 Features that make a difference Automatic pipe handling The KL rod handler on the Explorac 220RC is a proven and versatile component. It provides hands-free loading, unloading and stacking of drill pipes, both from the rig and from a rod truck or from racks that can be positioned anywhere within a 210 degree arc to the side or rear of the rig. It is operated by remote control, either by the driller or offsiders. This hands-free loading, unloading and stacking of drill pipes, makes the job easier and safer. Rotation unit The rotation head is a proven, robust unit that has two high torque variable speed hydraulic motors driving through a single reduction. The integrated above-head RC air and mud swivel is compact, reliable and easy to maintain. Adjustment, alignment and aintenance are simplified with a unique mounting system which also allows the head to be easily removed from the mast without disconnecting the feed chains. Double stage compressor The Atlas Copco XRX 12 compressor is a new, 30 bar pressure, two stage rotary screw compressor. Compact and lightweight, it is ideally rated for RC drilling and requires low engine power leading to significant fuel savings. Multiple connection points are provided for safe positioning of an auxillary compressor and/or booster compressor. All airlines are steel and designed for 70 bar. Remote control panel The unique control panel is portable and rugged. It can be positioned up to 10 metres from the rig, providing unequalled operator safety and maximum visibility of the drilling and tool handling processes. The ergonomically designed, adjustable panel gives comfortable and precise control over all drilling, rod handling, sampling and rig management functions. The integrated display screen is clearly read in any conditions and shows all drilling information, parameters and warnings. It also monitors and displays all engine, compressor and hydraulic system information and service data. As the electronic control unit manages all functions, troubleshooting is simple. 8

9 Breakout table The fully hydraulic breakout table is extremely versatile. The front opening opens to 310 mm and not only guides the drill string, but also clamps and holds any downhole gear or casing when breaking out. A hydraulic sliding key/spanner retains the drill rods in normal operation and the hands-free, hydraulic wrench performs all breakout functions safely. Power pack The Explorac 220RC is powered by the latest generation electronic Caterpillar C18 engine which exceeds Euro 3 emission standards. An intelligent engine management package linked with all other systems on the rig can adjust critical functions to provide optimum performance, reliability and fuel efficiency. Cooling system The cooling system has been designed to provide optimum cooling in the most extreme conditions. Individual lightweight cooler elements are housed in a vibration free V module that gives easy access for cleaning and allows simple removal if required. Rated to 50 C ambient temperature, it has two variable speed fans that regulate according to system demands, thus reducing noise output and fuel consumption. Sliding dumping system The sliding dumping system gives increased stability and safety when drilling. It ensures that all drilling loads are transferred directly to the ground, providing a strong, stable working base. The system allows the breakout table to be positioned at a height that suits the job. Along with the opening front table, this provides excellent access for large tool handling and casing operations. Cyclone The efficient, high volume sample cyclone is rigmounted and hydraulically retractable. This reduces set-up time and eliminates the need for a trailermounted system. Fitted with a sample collection box and individually operated doors, the rig produces accurate and fast sampling while minimising dust. A hinged top allows easy access for cleaning and replacement of the high-tech, long life, ceramic wear components. Mast The sliding dumping mast can be set up at any angle from 45 to 90 degrees and held into position with hydraulic locks. The breakout table height is adjustable, allowing easy access to the drillhole collar, for handling large tools and when conductor casing is used to start the drill hole. A 510 mm breakout table opening is available as an option when large diameter tools are to be used and there is a handy swing boom on the top of the mast together with a 1.5 ton winch which helps with the handling of all tools. The mast also has two pipe locators, one at the top and one at the bottom, enabling pipes and casings to be correctly positioned. 9

10 Explorac R50 Well proven simplicity The Explorac R50 is an extremely well proven workhorse with simple design. The high accessibility and reliability makes it particularly interesting for drillers operating in remote areas. The components and supporting equipment of the R50 is basically the same as will be found on the Explorac 220RC. The design is simple and the different parts of the rigs are easy to access and service. The proven technology and the ease of maintenance provides the driller more efficient working hours, and less downtime. This is of course of great use and interest, especially when operating in remote areas. The R50 can be mounted on a 4x4 truck or on crawler depending on which terrain the rig will be used in. The Explorac R50 can drill with dual wall drillpipes with OD 4 or 4 1/2 up to lengths of 3 m. The R50 is purpose built for DTH drilling and can work with air system pressures up to 25 bar. The rig can also be supplied with a mudpump for rotary drilling. And, as for the Explorac 220, the R50 can be delivered together with a complete package of all necessary drilling tools for reverse circulation. 10

11 Reliable tools for RC drilling Reverse circulation hammers from Atlas Copco are specifically designed for both deep hole exploration and in-pit grade control applications. The key criterias when developing the Secoroc RC50 hammer and bits were simplicity, performance and reliability. The Quantum Leap cycle has been incorporated into the RC hammer, creating a high frequency hammer with world class performance and reliability. The Secoroc RC50 s high frequency enables it to perform well in all rock formations with maximized efficiency. Combined with a piston-struck end and a heat-treated collection tube, this RC hammer guarantees longevity and reliability. A 15-20% higher penetration can be expected from this new series of hammers. Easy to service, a reliable design, exceptional service life and faster penetration rates settles for higher productivity. The higher frequency (blow per minute) provides a faster drilling and outstanding performance in soft to medium rock formations. And what s more, the high frequency together with a high mass piston provides a high output of power, ensuring cutting edge performance in hard rock as well. 11

12 Märsta, Sweden, March, Copyright 2008, Atlas Copco Craelius AB, Märsta, Sweden. Any unauthorized use or copying of the contents or any part thereof is prohibited. This applies in particular to trademarks, model denominations, part numbers and drawings. Illustrations and photos in this brochure may show equipment with optional extras. Specifications and equipment subjects to change without notice. Consult your Atlas Copco Customer Center for specific information. Atlas Copco Geotechnical Drilling and Exploration www. atlascopco.com