GET MORE LIFE FROM YOUR DRILLING CONSUMABLES –
DTARobit heavy duty drilling consumable solutions are available globally for mines and quarries. Our DTARobit products are Australian engineered solutions designed by drillers for drillers. These mining focused hammers are widely used at major mining houses and are the preferred choice of drillers for their DTH blasthole and RC drilling programmes. Products have been optimized through years of close co-operation with our clients resulting in higher productivity, more drilled meters and therefore overall reductions of costs in their operations.
Please read more: DTARobit Heavy Duty Series 2017
Overview
A Swedish company TGB had major difficulties in sheet piling through rocky boulders. With Robit’s pilot technology, the impossible was made possible.
The rocky terrain proved to be so challenging, that the company decided to pre-drill the holes with Robit® Multi-Use casing system and retrieve the casing (406.4/12.5; L=6000 mm) afterwards. In the same project some piles were permanent and with the Robit® DTH-RoX 3-1, the same pilot was used to complete the drilling with Eco-rings.
TGB was able to complete the project on time with controlled investment. Christer Wretman, our distributor in Sweden, says: “Impossible project was turned to success with Robit Casing System”.
Overview
To meet the demands from the contractor, Skanska needed new drill technology for reinforcing the foundations of a famous warehouse with underpinning.
A long-time landmark in the center of Turku, Sokos Wiklund warehouse building, needed a total of 200 holes to be drilled with casing in the underground parking hall. Additional corrosion reinforcement and concrete were then installed inside the 219.1/12.5 Ruukki casing tube. Due to space restrictions set by the site, a small drilling unit was used. Drilling with a ring bit casing system was the only alternative.
With Robit Casing System, the drilling was completed in a very short time. With such an impressive outcome, it was decided to introduce the system to several similar projects in the region.
Overview
A paper mill in Finland needed altogether 58 holes for foundation reinforcement with depth varying from 12 to 16 meters. The terrain over bedrock was difficult, but Robit Casing System handled it fine.
Sotkamon Porakaivo had a challenge with the job of casing drilling to the bedrock and then drilling one meter into the bedrock itself. The first six meters of the formation consisted of sand and gravel. Blocks of granite and grillage (wood, clay and gravel) had also to be dealt with.
Robit® Casing System was the preferred technology due to its ability to drill difficult formations. Casing tube of 139.7/5.6; L=3000 mm was used. A 90 mm diameter steel bar was inserted and grouted to each hole. The end result was that the drilling went smoothly despite the difficult drilling conditions.
Overview
The goal of this project is to secure the reinforced concrete bottom and wall slabs of the incoming water channel and also to prevent their final breakage and flushing away by water flow.
The project owner is Russian State energy company «Rushydro» and it is projected by OAO “Lenhydroproject” engineering company from St. Petersburg in cooperation with Robit Rocktools. From Robit´s side the project was supported by Mr. Kari Juntunen and Mr. Juha Sorjonen. The project also included underwater drilling which was made during the operation of hydro power plant.
The project included the following stages:
- diving operations in the depth of 8-9 m with water flow rate of 0,5 – 1,0 m/s
- drilling through 1,7 – 1,95 m reinforced concrete bottom slabs using 1 m diam. diamond bit
- removal of 1 m diam. pieces of reinforced concrete slab from the bottom
- construction of 720 mm pipe pile wall (height 11,5 m) on the river bottom through the drill hole in reinforced concrete slab
- concreting of the seam between the reinforced concrete slab and pipe pile wall
- underwater concreting and installation of the pipe pile wall on the whole length of channel
After the operations above the complete pipe pile wall is installed according to the cross section of the incoming water channel of hydro power plant. This construction is used to prevent the breakage and flushing away of reinforced concrete bottom slabs what has already taken place during the last 20 years of operation.
Time of the project is 2 years but due to the working schedule of the power plant surface and underwater operations can be commenced only in July – September.
The installation of pipe pile wall was started in July 2013 by contracting company “OOO SU-299” from St. Petersburg. Till the end of September 15 piles were drilled and 20 m of pipe pile wall was installed. The method has proved to be successful and economical in the extremely hard working conditions of Yakutia.
From “OOO SU-299” company the project was managed by Mr. Vitali Korshunov, Project Manager and Mr. Vladimir Klimov, Development Director.
The following machinery was used in the project:
- “BRAUN” diamond drilling equipment and tools
- “ROBIT ROCKTOOLS” drilling technology and tools, Wing Bit DTH SF 720/10 N180
- “COMACCIO” DTH drilling rig
- “ROBIT” 18” DTH hammer
- 200 t and 500 t barges, floating crane 5 t , a towing vessel
Overview
Solna Arenastaden right next to Solna railway station needed support piles for passage over railway between Arena and surrounding buildings. The urban site called for extra care and Robit products.
The work site needed some 150 piles (220/12.5) to be driven to overburden ground, which tends to ”suck the water” due to numerous fractions. What’s more, there was a large sewage passing near the worksite, let alone railway and buildings. In this environment, any pollution would be no-no as well.
Due to ground type, air drilling would almost surely cause problems to surroundings. The use of Wassara W150 ensured fast penetration and created less noise. The project was finished with minimum disturbance.
Overview
Robit, in collaboration with our retailer Swedish retailer GDS Sverige AB, put our new HZ product series to test under a motorway ramp near Landvetter airport.
Robit has been developing the new HZ series for horizontal drilling in Sweden since the early 2011. Now, the new system was put through its paces under a motorway ramp, where a 24-meter hole of size 406.4/12.7 was drilled. The land filling under the ramp consisted partially of very large boulders. Because of the boulders and directional requirements, the drilling was a challenging test to our new HZ series.
Despite the rough terrain, the results proved successful. No problems occurred, and the drilling went as
planned. What’s more, the test drilling results have enabled the company to further improve the functionality of the HZ product line.
Overview
The so-called West Metro is a major expansion to current underground railway system in the Finnish metropolitan area, stretching it all the way to Espoo. Lemminkäinen is in charge of building the Koivusaari metro station, complete with a kilometer of tunnel. As usual, Robit delivers the goods.
The project, involving much earth-moving and digging, takes place in an urban, unforgiving environment. “The location is challenging, so it is essential that all components needed for the work have high quality and reliability”, says Annina Peisa, Construction Manager at Lemminkäinen. “Our suppliers have a substantial impact on the success of our projects”.
Lemminkäinen and Robit have been co-operating successfully for the past ten years, and this site is no exception. The installation and drilling tools required for making excavations and supporting the walls with RD piles this are supplied by Robit. Thanks to our dedicated, knowledgeable service, the construction is well on the way, and expected to be finished on time.
No wonder Peisa is pleased: “Robit is a very customer-oriented partner”, she says. “If we have any problems in our projects, Robit will provide us with quick and professional service. They will come and check the situation on site as needed.”
Customer description
Lemminkäinen is a construction group specializing in building construction, infrastructure construction and technical building services. Its main markets are Finland and the Baltic Sea region. The Group employs about 8,400 people, and its turnover in 2011 was approximately EUR 2.2 billion.
Top Hammer Drilling
In Top Hammer Drilling the hammer produces a percussive force on the drill rods or tubes, which is transmitted to the drill bit. The feed device is usually attached with a hinged boom to a mobile unit. The percussive system strikes the drill rod, for example 2,000-5,000 strikes per minute, and the rotation speed can be, for example, 60-200 rounds per minute. Together these elements make it possible to drill holes in the hard rock. The excess material (cuttings) is flushed up from the bottom of the hole by means of pressurized air or water. Top hammer drills are primarily used in mining, construction and quarrying of rock material. Top hammer drilling, combined with the “drill and blast” method, makes the whole excavation process extremely efficient.
Robit Top Hammer business line covers all applications in construction, quarrying and mining, as well as blasting and forepoling (Tube Umbrella, NATM), from the softest to the hardest of rock conditions. Underground construction is one of the most important customer segments for Robit bits, and applications such as drifting and bolt hole drilling are well catered for, as well as RoX top hammer casing systems for tunneling support. Robit’s quality has been approved worldwide by major mining and quarrying customers. The selection is wide and encompasses products, such as: drifting and tunneling bits, reaming equipment, bench and production drilling bits, rods, shanks, couplings, and auxiliary tools, such as button bit adapters.
Robit competitive offering in Top Hammer drilling consumables:
- Efficient Button Bits – top of the class rate of penetration providing lowest cost per meter.
- Developed in co-operation with customer’s field tests.
- Reliable Reaming Equipment – wide range of modern Rbit™ Dome Reamers.
- Strong Drill Steel – Rods, Top Hammer Drill Tubes, Shanks and Couplings. Manufactured in one of the world’s most modern factories in South Korea with the latest technology. Shanks for all common drifter brands. Wide range of rod types and lengths.
Proven quality – manufactured with automated production lines
- Sustainable, 100% recyclable steel and over half of it is carbon neutral
- Excellent and optimized bits for abrasive and soft rock formations
- High penetration rate in all rock formations
Robit guarantees You:
- The highest quality in drilling tools – our focus is 110% in drilling tools
- Proven excellence in drilling performance – backed by numerous references
- We emphasize short lead time and precise deliveries from our 3 factories, supported by comprehensive local availability on every continent.
Robit is following together with its key customers the development steps of more powerful hydraulic drifters. Robit is modelling and simulating the dynamic forces and stresses, and innovates new solutions to meet the drillers’ needs for the best performance, efficiency and lifetime.
Drill FURTHER and FASTER with these high penetration rate drilling tools
Rotary Drilling
Rotary drilling is a method of drilling that employs a sharp, rotational drill bit to bite its way through the earth’s crust. It relies upon high rotational speeds and thrust without percussion to achieve the desired effect and outputs. In rotary drilling, the rock is made to fracture by means of a combination of “pull down” pressure on the bit and rotational power “torque”. Weight is applied to gouge, chip and grind the rock. Tricone rotary bits are sometimes a good alternative to a DTH hammer. It is used in the construction, mining, and oil industries as well as water & thermal wells. Robit offers TCI (carbide buttons) and mill tooth configurations.
Reverse Circulation
Robit’s Reverse Circulation (RC) products help you drill deeper and faster and importantly delivering high quality samples for your customer. Reverse circulation is achieved by blowing air down the rods, the differential pressure creating air lift of the water and cuttings up the “inner tube”, which is inside each rod. It reaches the “divertor” at the top of the hole, then moves through a sample hose which is attached to the top of the “cyclone”. The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in a sample bag.
Down the Hole (DTH) Drilling
A down-the-hole drill, usually called DTH is mainly a pneumatic powered rock or ground drill, in which the percussive hammer is located directly behind the drill bit, so the percussion mechanism follows the bit down into the drill hole. The drill pipes transmit the necessary feed force and rotation to the DTH hammer and bit, as well as compressed air for the DTH hammer. Air flushes cuttings up from the bottom of the hole. Drill pipes are added to the top of the drill string as the hole gets deeper. The piston directly strikes the impact surface of the bit, while the hammer casing gives guidance to the drill bit. The fast hammer impact breaks hard rock into small particles, which are blown up by the air exhaust from the DTH hammer.
Robit Down the Hole business line covers all operations related to the down-the-hole drilling method. The main product categories consist of DTH hammers, DTH bits and DTH tubes. The selection is competitive and encompasses top quality products for all your drill & blast as well as well-drilling applications.
Robit competitive offering in Down the Hole drilling tools:
- Unbeatable DTH Hammers – Wide range of all sizes of blast hole, general purpose, well-drilling, and reverse circulation hammers. The hammers have robust design as well as minimized fuel consumption and optimized air flow with the highest performance.
- Efficient DTH Bits – For drilling blast holes, wells; for general purposes as well as RC models for sampling. Robust designs for achieving maximum penetration rate in hard and abrasive rock conditions.
- Robust Casing Advancing Systems – Sizes from 114.3 mm up to 1524 mm. Wide range of ring bit, wing bit, eccentric and drill through models. Proven quality worldwide – references in all applications.
- Reliable Shock Absorbers – Efficient dampening available for hammers from 2” up to 33”.
- Strong Drill Pipes – Single pipes available from OD 76 mm up to 323 mm sizes and double pipes from OD 406 mm up to 1220 mm. Tool joints API reg. and HEX standards.
- Wide range of Accessories – Wide range of subs, check valves, hammer sleeves, air hoses, and chain keys. Ask for more: sales@robitgroup.com
Proven quality – manufactured with automated production lines
Robit guarantees you:
- Lower fuel consumption
- Best in class performance
- Unbeatable in all conditions
- Longer wear resistance
Drill FURTHER and FASTER with these high penetration rate drilling tools
Casing systems
Robit® Casing Systems are the key components of the ground drilling applications. Their patented locking system enables easy and reliable drilling cost effectively. Robit® Casing Systems have several references worldwide in all major ground drilling applications: forepoling, anchoring, piling and underpinning, horizontal drilling, water and thermal well drilling, soil investigation/ monitoring and underwater drilling.
Overview
A world-class parking facility called Kivisydän (“Heart of Stone”) is currently being excavated by Finland’s leading underground construction company, Lemminkäinen Corporation at a depth of 30 meters beneath Oulu’s city center. One of the largest and most challenging of its kind in Finland, the project makes good use of Robit’s expertise.
Robit Rocktools Ltd and Lemminkäinen have worked in close co-operation for nearly a decade, mostly in ground drilling. Kivisydän is the companies’ tunnel excavation pilot project. “The project extends our good partnership to the area of tunnel construction. Robit is supplying us with the latest technology button bits needed to excavate the underground parking facility. They are also taking care of sharpening the bits,” says Pentti Nieminen, site manager from Lemminkäinen.
Construction and excavation in the downtown core sets special demands on the work and planning. “This is a challenging underground site” emphasizes Pentti Nieminen. “We need expert partners whose work we can trust explicitly. In demanding conditions, knowledgeable people and state-of-the-art equipment are crucial for success”.
Robit’s trump card is, in addition to high-quality products, the smooth integration of a bit-sharpening service with deliveries. “Thanks to the service, our cooperation partners don’t have to worry about servicing the bits. This allows them to focus completely on their core competence,” explains Timo Rajala, Robit’s Finnish Sales and Marketing Director.
Overview
In the course of the years, Robit Rocktools Ltd has been involved in several Olympic Games building projects all around the world. The work will continue with the next Winter Olympics in Sochi, as the local contractors rely on Robit products for digging the tunnel network – a necessary part of the game venue infrastructure.
The 2014 Olympic Games will be organized in Sochi, the first Winter Olympics to be held in Russia. To ensure smooth transport between the various sites, a tunnel network with a total length of over 26 kilometers is being excavated in the area. One of the key factors behind Sochi’s selection as the Olympic City was the creation of a functional road and railway network, and Robit has its share in this.
Several contractors in Sochi are utilizing the Robit RoX+ 88.9/8 Top Hammer system in tunnel work. The system consists of a pilot bit automatically locking with a ring bit, which makes work considerably easier and faster. “Word about the excellence of our product quickly got around the Sochi sites, and a total of six contractors started using it”, says Oleg Ivanov, Regional Manager at Robit Rocktools Ltd.
“Our co-operation went smoothly. The contractors appreciated our proactive technical support and service. We were able to respond to their wishes comprehensively,” Ivanov continues. Work on the Sochi tunnel sites is getting near completion. “We will continue by delivering our HTG bits to the Olympic sites as needed.”
Overview
The challenging construction work of the new, westbound metro line in Helsinki demands wide-ranging expertise. Drilling maintenance shafts for metro tunnels has little room for error, but Kalliorakennus-Yhtiöt ensured a successful end result by using Robit products.
The metro tunnel shafts are a vital part of the underground railway system. They serve as emergency exits, smoke vents and pressure equalization as well as ventilation systems. Among their other large contributions to the West Metro construction, Kalliorakennus-Yhtiöt had to drill 44 meter-deep shafts with a surface area of 68 square meters to solid Scandinavian bedrock – by no means a trivial task.
“We set tough quality requirements for the project, as the work outcome must be exact. We drilled the excavation holes for the shaft from the top right down to the bottom, whereas drilling is normally carried out from both the bottom and the top. It was crucial that the holes turned out straight,” explains site manager Martti Kähkönen from Kalliorakennus. “We used Robit Rocktools special equipment to make sure the drilling holes were straight”.
The collaboration between Kalliorakennus and Robit go back since the early ‘90s. “All of the bits we use are from Robit, because they are familiar products for me. I participated in the bit development work for the first time many years ago”, Kähkönen recalls. In addition to the shared history, Robit’s wide service offering has also impressed Kalliorakennus. “Robit is a reliable partner, but their bit-sharpening service was also a major reason behind why we chose them as co-operation partner in the West Metro project,” he says.
