The drill head rotates at different speeds, most rigs allowing between 0 and 50 revolutions per minutes, and is the directional drilling equipment that takes the brunt of the wear and tear. The drilling bit is arguably one of the most important parts of the entire directional drilling process. Smaller directional drilling projects require shorter masts, while serious jobs require masts that often extend further than 12 metres in length! Drilling Bit Directional drilling masts are able to angle between 45 and 90-degrees (depending on the angle needed). Like most drilling rigs, directional drilling rigs feature a heavy-duty mast that comes in various lengths. The mast is the ‘long part’ that most people point out when seeing drilling rigs. Should your directional drilling take you to remote locations, away from tar roads, directional drilling rigs can be mounted to either truck or track mounts for transportation and manoeuvrability of the rig. For long-term drilling projects, a skid mount is perfect. The drilling rig carrier is the actual device that supports and/or transports the machinery. Bohrmeister takes a look at four components all directional drilling rigs feature, how each contributes to the directional drilling process, and where you can procure directional drilling equipment in South Africa… Drilling Rig Carrier There are a number of common components that make up directional drilling rigs, however there are many formats these directional drilling components can be assembled in. There are four main types of directional drilling techniques used today: oilfield directional drilling, utility installation directional drilling, directional boring, and surface in seam – used in coal bed methane extraction. Previously with a diesel-hydraulic rig, consumption was 58 liters per hour.Directional drilling, otherwise known as Horizontal Directional Drilling (HDD for short), is the act of drilling in a non-vertical trajectory. The first Danfoss-Normag rig was delivered to a client in Poland, who reported fuel consumption as low as 18 liters per hour. Operators benefit from significant fuel savings. These are built to use the quality of fuel locally available. With our system, operators have the freedom to rent locally the diesel generators they need for the particular job. The reason is that diesel quality is often not up to the quality needed for today’s gen-sets. In developing countries in particular, that is a huge advantage. It removes the need for dedicated generators as part of the mobile drilling apparatus. “In the world of horizontal drilling, this machine is a real game-changer because unlike conventional systems with hydraulic drivelines. Pieter Dijkstra, Managing Director of Danfoss Netherlands says: However, this is offset by the significant fuel savings and operational flexibility enabled by the new system. The electrified system adds approximately 10 percent to the overall capital cost of a €1 million mobile drilling rig. The machine has halved fuel consumption and associated emissions, and reduced noise generated by the operations. Meaning fewer carbon emissions are released which makes the new solution more environmentally friendly. The machine consumes less fossil energy than conventional systems. The machine offers greater operational flexibility in remote locations where conventional diesel-hydraulic systems have difficulty gaining access. They have been specifically designed to withstand the very wet and muddy conditions encountered in horizontal terrestrial drilling environments. The machine's operational controls are digital. Improving operational flexibility and reducing carbon emissions These provide a combined capacity of 750kW. These supply AC power to the three main electric motors and six ancillary ones that drive and control rig operations. Instead of the hydraulic motors and pumps that drive standard horizontal drilling systems, the Danfoss-Normag machine has 12 inverters. Additionally, ducting for pipework and cabling for power and other services in fully developed urban areas. This is to create tunnels for water, drainage, and sewerage. The Danfoss-Normag drill system can dig lateral shafts up to 1.2m in diameter, bored through subsoil for distances of 3km. Danfoss specifically developed the hybrid powertrain for the new steerable-drill system. In July 2017, Danfoss developed the world’s first hybrid electric horizontal drilling machine for groundwork applications. World’s first hybrid electric horizontal drilling machine for groundwork applications One that was far more fuel (and cost) efficient than its initial electrical rig. Normag, a Dutch industrial drilling equipment manufacturer, needed an HDD solution.
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