![]() Horizontal Directional Drilling is one of the most popular trenchless technologies. Therefore, it is necessary to build new pipelines networks using dig and no–dig techniques. Also, in Poland in recent years there has been a significant increase in natural gas consumption. ![]() This paper focus on new era for construction sector of underground utilities in India.Īn increase in demand for energy natural resources has stimulated the development of gas pipeline networks in Europe, as well as globally. The main objective is to install such services without using traditional trenching methods, helping to avoid any unnecessary environmental impact and provide added security. " It is currently an efficient, safe, cost effective method for highway bores and is the current industry standard for Trenchless technology for bores between 2 and 48-inch diameters. Traditionally HDD is applied to large scale crossings such as rivers in which a fluid filled pilot hole is drilled without rotating the drill string, and this is then enlarged by a wash over the pipe and back reamer to the size required by the product. Horizontal Directional Drilling (HDD) is defined as " A steerable system for the installation of pipes, conduits, and cables in a shallow arc using a surfaced launched drilling rig. Call us today to bring that level of experience to your next trenchless conduit installation.Horizontal directional drilling (HDD) was pioneered in the United States for an innovative road boring contractor who successfully completed a 183 m river crossing using a modified rod pushing a tool with no steering capability. To find out more about Directional Technologies as a company, and how we can help you, visit About Us.ĭirectional Technologies has installed miles and miles of conduit using directional drilling over the past quarter-century. This method of installing conduits has many benefits that include less disruption of commercial activities, less disruption of traffic, less site rehabilitation, and directional drilling can also be used to avoid damage to wetlands, streams, and for river crossings. After the bore path is enlarged, the conduit is simply pulled into place by the directional drill rig. As depicted in this video, and as most directional drilling projects, very little of the normal city activities were interrupted during the conduit installation. The reamer is simply pulled through the existing bore path to enlarge the hole. In this installation, the bore path must be enlarged to accommodate the conduit and a reamer is attached to cut a larger diameter hole. The bore path is typically enlarged to one and a half size the conduit that is being installed. The Pilot Bore, Reamer, & ConduitĪ typical midsize directional drill uses a 4-inch drill bit to drill a pilot bore. The drilling crew always can determine the exact depth and location of the drill bit. An experienced directional drilling crew can navigate and steer the drill bit up, down, right, left, and a combination of varying degrees of each to drill the desired horizontal bore path. The locator then gathers and interprets the information and then gives directions to the directional drill operator on which way to steer the drill bit. The directional drill bit is tracked by a sonde, or radio detection device, housed within its extended connection to the directional drill pipe, the depth and pitch is sent to the surface and received by the walkover locating device. The directional drilling crew are in radio communication with each other throughout the entire process. The entrance pit is used to contain and manage the drilling fluids. The horizontal bore begins with the directional drill bit entering the entrance pit. Before the drilling begins, the crew pre-plans the bore path to carefully avoid obstructions such as other underground utilities. This area can be strategically placed away from congestion and business activities. A small area is needed to set up the equipment. As demonstrated in this video, conduits such as water, sewer, fiber, electric, and gas can be installed under very busy intersections without disruption of traffic. Directional drilling is used to install conduits under obstacles such as roads, buildings, and wetlands.
0 Comments
Leave a Reply. |