This is achieved by pumping drilling fluid (mud) down the inside of the drill rods, which flushes the drilled material back out of the bore. The planned bore path, such as illustrated in. It is important that, if the pipe to which the new pipe is being connected has spigot and socket joints, which will have little end load resistance, means must be provided to absorb the axial tension. Additional route bends, beyond those shown in. Directional boring offers significant environmental advantages over traditional cut and cover pipeline/utility installations. The bore is steered to create an initial hole at the required line and grade. These plastic pipes offer a new generation of leak-proof, maintenance-free, and energy-efficient pipeline systems that are chemical- and abrasion-resistant and therefore excellent for use in the lining and relining of pipelines, slurry applications, water reticulation, sewer and stormwater systems, the mining industry, and in dolomite areas. 3.0 SCHEDULE . The MGS, even without the use of the wire grid, has been accurate to over 2km with an accuracy of 2% at depth. Contact us today for a free quote. Weight is calculated using DN and Minimum wall plus 6% for use in estimating fluid flow. This can be changed at any time via the Cookies link at the bottom of the page. Lastly, the pipeline is pulled into the enlarged hole, thus creating a continuous segment of pipe underground exposed only at the two initial endpoints. See also Excavations, pit sizes, Space and Access. Pipeline Design for Installation by Horizontal Directional Drilling -. F1962 Standard Guide for Use of Maxi-Horizontal Directional [1], Although often used interchangeably, the terms directional boring and horizontal directional drilling are distinct in that they convey a different sense of scale. Midi-HDD equipment may be used for crossing beneath rivers and roadways. The size, complexity and need for additional support equipment increases generally as the pipe diameter and length increase. Horizontal drilling, one type of directional drilling, is a method that is used to install pipes, conduits and cables underground in a long shallow arc. HDD, also known as directional boring, was developed in the early 1960s and was first used by the oil and gas industry on large-diameter, cross-country pipeline transmission line installations. 2022 Underground Construction, 2022 Gulf Publishing Holdings LLC. 450046. Mini-HDD operations are often performed during an upgrade of a large community, comprising many individual installations, with any single installation typically not receiving extensive investigation or analysis. hbbd``b`$mA,k D\ Regulations and damage prevention (Section 6). %%EOF Waste discharge, Drainage, Mining, Slurry, Sewer, Water Reticulation, Stormwater Systems 5.8m or 11.8m/ length with the flanges ends(customizable), National Standard Laboratory/ pre-delivery inspection, Research, Design, manufacture, Test, Sales, Solution Providing, After-sale service, Black with blue stripes, black or others colors. 0000002438 00000 n On inaccessible projects such as river crossings or where the bore is at significant depth and where a surface receiver cannot be used, the drilling head location information is typically sent from the drill bit by a wireline system, via a wire running along the inside of the drill rods. This method applies tension to the PE100 pipe during installation. 0000021613 00000 n That is, the soil is being cut and or removed under the influence of high pressure fluid. The drilling fluid is sent into a machine called a reclaimer which removes the drill cuttings and maintains the proper viscosity of the fluid. FIGURE 2 illustrates a typical geometry for a maxi-HDD operation, in this case corresponding to a river crossing. For the geometry shown in FIGURE 2, with relatively shallow entry and exit angles, the associated load amplification due to this effect is not major; although for more complex paths, the effect could be very important. The drilling fluid is typically a suspension of a bentonite clay and polymers. The indicated bore/pipe path comprises three segments spanning the pipe entry (point A) to its exit point (point D), with horizontal projected distance Lbore, equal to the sum of the three horizontal (projected) segments L, exterior to the drilled path allows for handling at both ends and possible other effects (path curvature, thermal contraction, stretching, etc.). Fluid exhaustion associated with smaller bores is proportionally less as well. Typical Entry Site Layout. Directional boring can be utilized with various pipe materials such as PVC, polyethylene, polypropylene, ductile iron, and steel provided that the pipe's properties (wall thickness and material strength) enable it to be both installed and operated (if applicable) under acceptable stress limits. The number of construction personnel is relatively small, and at least 10-20 people are required for manual excavation, while only 7 people are used for pipeline directional drilling technology. Drilling uids are designed to match the soil and cutter. Safe for the environment, recyclable and does not emit hazardous toxins during manufacturing or installation. There is no request too small or job too complex. Lengths well in excess of 1000m can be installed with this technique, though depending upon the diameter required the limiting factor may be the axial load capacity of the PE100 pipe for pull-back into the bore. Successive reamers of increasing diameter are used until the bore is of sufficient size to accept the PE100 pipe. Nonetheless, some mini-HDD installations may be considered to be relatively critical, or approach limits with respect to the capability of the available drill rig and/or the strength of the product pipe being installed. For a drill of this length, with a pull back of 10 inch HDPE pipe, the anticipated schedule is set out in Table 2: Table 2. Because of its high ductility and flexibility, and ability to be fused in continuous lengths, per the well-established ASTM standards and by experienced contractors, PE, particularly high-density polyethylene (HDPE), is the most commonly used pipe product for HDD projects. The effect of shear forces directly imparted on the surface of the pipe by the drilling fluid (fluidic drag) has been handled in a widely disparate manner within the industry and is sometimes a major consideration. Reliable communications must be in place between the pipe entry location and the drilling rig operator, so the rig can be stopped immediately if required. 0 He can be reached at lslavin@ieee.org. The ASTM International document provides overall guidelines, addressing preliminary site investigation, safety and environmental considerations, regulations and damage prevention, bore path layout and design, implementation, and inspection and site cleanup. The stiffness of the steel drill rods determines their allowable curvature, in order to avoid fatigue. It can be used on land, sea, urban areas and rivers. It is used instead of other techniques to provide less traffic disruption, lower cost, deeper and/or longer installation, no access pit, shorter completion times, directional capabilities, and environmental safety. The most significant was to the alternative guidelines TR-46 provided by the Plastics Pipe Institute (which has been superseded by its Municipal Advisory Boards MAB-7), as more appropriate for mini-HDD operations. 0000019826 00000 n Midi-HDD may be employed for boring paths up to 1,000 feet in length, at depths as much as 75 feet, and placing pipes up to 24 inches diameter. Lawrence Slavin, Ph.D., provides outside plant consulting services as a member of IEEE, the worlds largest technical professional organization dedicated to advancing technology for the benefit of humanity. 0000002811 00000 n The pipe must be appropriately aligned with the bore and at an appropriate bending radius to avoid any risk of kinking. Monitoring and contingency planning should be in place prior to and during drilling below or in the proximity of environmentally sensitive locations. 0000015903 00000 n Thus, guidelines for the use of midi-HDD machines and associated practices, including pipe selection methodology, may be obtained from the TR-46 document and/or ASTM F 1962, depending upon the judgment of the contractor or engineer. The planned bore path, such as illustrated in FIGURE 2, must be consistent with the steering capability of the maxi-HDD equipment, and the bending capability of the drill rods. At no time during welding or installation must the pipe be allowed to drag on the ground and it must therefore be supported on rollers, though it should be stored directly on the ground to avoid indentations from supporting rollers or timbers if there is to be a delay in installation. This technique involves drilling a pilot bore, generally along a closely defined shallow arc, and then, if necessary, enlarging the bore using a reamer or hole opener to create a bore large enough to accept the new PE100 pipe, which is generally pulled in behind a reamer. The use requires that the operator have complete information about existing utilities so that they can plan the alignment to avoid damaging those utilities. In some situations, more than one wall type will have sufficient 0000029623 00000 n Other subsurface conditions which can impact the feasibility of directional boring include excessive rock strength and abrasivity, poor rock quality, and rock exhibiting karst features. where the drilling proceeds from left to right. with relatively shallow entry and exit angles, the associated load amplification due to this effect is not major; although for more complex paths, the effect could be very important. High-density polyethylene (HDPE) conduit is the preferred material to house and protect electrical power and telecommunications cables within. greater than 1.0 indicates that the displayed wall type will have was originally approved in 1999, following development within the ASTMs F17.67 Trenchless Technology Subcommittee. For the larger diameters, the equipment is large, and requires support equipment such as generators and hydraulic power units. This method has a very small potential damage footprint provided that adjacent buried infrastructure can be accurately located. The route planning should include subsurface investigations/survey to identify ground conditions, so that appropriate equipment can be selected. Unnecessarily large curvatures (sharp bends) also contribute to bending stresses in the HDPE pipe, but generally are not significant for such a flexible product. Uncontrolled or unguided drilling can lead to substantial destruction, which can be eliminated by properly locating and guiding the drill head. The ASTM standard specifically addresses polyethylene (PE) pipe, a flexible product, for which the effects of any bending stiffness on drag forces at route bends or path curvature may be ignored. xref Due to the magnitude and complexity of maxi-HDD equipment and control systems, a well-trained, experienced crew is essential to plan and execute the operation. During pull-in of the pipe a load link should be inserted between the swivel and the pipe to show and record the axial load applied. It should first be allowed to reach mechanical and thermal equilibrium, to avoid shrink back onto the bore hole. HORIZONTAL DIRECTIONAL DRILLING PART 1 GENERAL 1.1 DESCRIPTION A. For larger diameters, and in rock, the drilled material must be removed from the bored hole as drilling and reaming progresses. 0000017224 00000 n Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. The intermediate horizontal segment, L3, may be of zero length. Compared with traditional trenching and buried pipes, it has better technical, environmental protection and economical efficiency, and is suitable for crossing streets, highways, railways, buildings, and rivers, especially in downtown areas, historic sites, green belts, where excavation is impossible or unsuitable areas. It should not be used in place of the advice from a licensed Professional Engineer. The project quality is good. The output of the Calculator can be used to assist the User in Because trenchless technology greatly reduces the need for invasive excavations, it has a much smaller impact on the surrounding environment, both ecologically and socially. H0+X u7A@>&F It is also important to identify areas of poor or difficult ground, such as gravel and cobbles, which could allow the drilling mud to escape or create bore instability unless an appropriately engineered drilling mud can be used. As the use of trenchless technology continues to grow in popularity and use, so too does the importance of using top-quality pipe material that meets the specific requirements of the particular technique being used. The development of trenchless technology to rehabilitate existing underground infrastructure with minimal disruption to surface traffic, business, and other activities, has left a lasting impact on the construction and civil engineering industries. Additional route bends, beyond those shown in FIGURE 2, as well as possible bends in the horizontal plane, should be avoided, and will increase the required pulling forces. Advantages of the High Density Polyethylene Trenchless Pipes For Horizontal Directional Drilling The biggest advantage of HDPE HDPE trenchless pipes for HDD besides its long-life expectancy, is its heat-fused joints, which make the pipe a single homogenous pipeline. 0000018683 00000 n The drilling mud lubricates and cools the drilling tools, as well as providing support to the periphery of the bore. Pipe hdd drilling, slant drilling, horizontal directional drilling good practices guidelines, drill guide for pipe, utility horizontal directional drilling, directional drilling manual, directional drilling through rock, how much does a directional driller make, horizontal directional boring specifications, small directional drill, back reaming drilling definition, horizontal pipe rollers, directional drill back reamers, horizontal directional drilling specifications hdpe, how to drill horizontally, small directional boring machine, horizontal directional drilling procedure, hdd drilling procedure, horizontal drilling techniques, horizontal bore, hdd drilling equipment, hdd machine price, straight line directional drilling, horizontal directional drilling process, horizontal directional drilling standards, horizontal direct drilling, horizontal drill guide, dig and rig equipment, what is horizontal directional drilling, drilling pipes, horizontal drilling equipment, horizontal directional drilling rig, how do they drill horizontally, what is slant drilling, drilling pipe sizes, directional drilling methods, horizontal directional drilling guidelines, horizontal directional drilling design guidelines, horizontal directional drilling machine, horizontal directional drilling specifications, hdd pipe, barrel reamer hdd, horizontal directional drilling equipment, PE100+ Association 2013-2023 - All rights reserved. Noise and air pollution are also kept to a minimum and rehabilitation time is short. He can be reached at lslavin@ieee.org. 349 0 obj <> endobj Pressure capability is dependent upon pipe SDR and is not a function of the method. At diameters up to and including 180mm the new pipe can be supplied as a coil, and this will be loaded into and dispensed from a coil trailer, positioned adjacent to or over the entry excavation. To determine HDPE pipe performance during and following construction, linear displacement transducers, strain gauges, and a temperature probe . This method is regularly used on distribution systems, which typically use small diameter mains, and on rural distribution systems it often enables mains to be installed alongside the carriageway without impeding traffic flow, as the drilling equipment is compact and self contained. This arc follows a preset bore path using a surface drilling rig. Using directional drilling techniques to guide a drill string along a bore path under obstacles such as rivers, lakes, railway crossings or highways, enables replacement of existing water lines, or installation of new ones, at a relatively rapid rate. Horizontal drilling, one type of directional drilling, is a method that is used to install pipes, conduits and cables underground in a long shallow arc. 349 32 Especially HDPE raw materials have good adhesion and toughness. To improve your experience, other cookies may be used: you can choose to disable them. hTYO0OG >rKR(PQ9Fg&% Depending on the location and extent of the operation, a variety of permits or approvals may be required, possibly from federal, state or local jurisdictions. Experience: Actively engaged in horizontal directional drilling for minimum of 3 years. High-density polyethylene pipe is the most common type of pipe used in the directional drilling market and is used for 49.7% of projects. Once the User enters the required Input data and clicks Calculate, 3), PR-277-144507-Z01 Installation of Pipelines by Horizontal Directional Drilling Engineering Design Guide (Arlington, VA: Pipeline Research Council These pipelines can not only provide a design life of 100 years, but also provide solutions to major industry challenges such as corrosion and high leakage rates. Calculator allows, users are recommended to review PPI TR-46 and/or ASTM several outputs are shown simultaneously, along with a summary of the High-density polyethylene pipes are now widely used in the sewer industry. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. Why choose PE compounds for pressure pipe ? The ASTM document provides overall guidelines for a maxi-HDD operation, addressing preliminary site investigation; safety and environmental considerations, regulations and damage prevention; bore path layout and design; implementation; and inspection and site cleanup. The HDPE pipe chosen for the twin sewage tunnels has an outside diameter of 740mm and an internal diameter of 600mm, with a standard dimensional ratio (SDR) of 11 and a pressure rating of 16 bars. [3], The process is suitable for a variety of soil conditions including clay, silt, sand, and rock. This is a highly specialised technique, and needs an experienced and highly trained operating team, an essential member of which is the drilling mud technician, particularly on the larger diameters. Supporting the 10 main sections, several appendices provide the physical properties of selected PE material, as well as a means of determining the post-installation loads and pipe deflection. The primary focus is on commonly used high-density polyethylene (HDPE) pipe with a material designation code of PE4710. ;0CKh6sKjrmlq9vwiJ%)m5]UWd [citation needed], The process starts with the receiving hole and entrance pits. Safety and environmental considerations (Section 5). For flexible PE pipe, with minimal bending stiffness, the considered bearing forces are those due to the: In addition, the drilling fluid/slurry flowing along the length of the pipe also contributes, but is relatively low, based on the present model. Output can be emailed directly from the Calculator, or The third stage places the product or casing pipe in the enlarged hole by way of the drill stem; it is pulled behind the reamer to allow centering of the pipe in the newly reamed path. The technique is routinely used when conventional trenching or excavating is not practical or when minimal surface disturbance is required. The pipe string is attached to the back-reamer through a swivel device. Installation lengths are typically 30m and greater. Image Courtesy:Exova Utilities, Barrel Reamer.Image Courtesy:Exova Utilities, Mud recycling plant. hb```b``d`a`` @p!y Potential safety issues fall into two general categories: Although not considered to be hazardous materials, the proper handling and disposal of drilling fluid is also discussed to avoid possible environmental issues. Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications. Day Activities . Rizkalla, Moness. HDD Analyser performs the pipeline stress analysis and HDD design calculation in compliance with the International Codes and Standards. In contrast, the convenient model employed in ASTM F1962 results in a very low magnitude effect, which is directly added to the estimated pulling forces, due to frictional drag, including the capstan effect. Horizontal directional drilling is often used where open cut installations are not feasible, such as road and river crossings. International, Inc., 2015, pg. 0000020409 00000 n The theoretical model used to develop the formulae for estimating the peak required tension (Section 8) assumes that the local frictional drag forces on the pipe are proportional to the local normal bearing forces applied at the pipe surface. HDD Analyser is a comprehensive program for the design analysis of pipelines crossings by horizontal direction drilling methodology. Toggle navigation. Dead (empty) weight of the pipe above ground, Buoyant weight of the submerged pipe, possibly reduced by use of ballast). The operator of the MGS communicates with the driller and guides him towards a predetermined engineered drill path. hbbd```b``k$T "7> Alternate materials will require prior approval. 7_ Hn0EYZJ2^u6*u.!Z'3:f[@]p!1HvELiF|Uku mSYQ'IS`2"q ,`-*{|dcHgQcm=JpjW 0000009554 00000 n For larger diameter pipes, which are supplied in straight sections, these sections should normally be fused together to form a single continuous length of pipe prior to commencing the pull-in operation. International, Inc., 2015, pg. 1.2 QUALITY ASSURANCE A. 0000018014 00000 n Such effects are independent of the pipe stiffness, pipe diameter, borehole clearance, radius of curvature or direction of curvature, and, in some cases become a major consideration due to their compounding effect. Add: 13th F, Longyu International Building, Zhengzhou Area(Zhengdong), China(Henan) Pilot Free Trade Zone. The Calculator uses input such as directional changes in the bore A clogged bore creates back pressure on the cutting head, slowing production. Pipefusion is a supplier of high density polyethylene pipe (HDPE) available in solid wall, perforated, profile wall, insulated and gas applications. Typically a thicker wall is required for HDD pull-back capacity than is required for operating pressure. As the drill string is withdrawn to the drilling rig, the back-reamer enlarges the borehole and the pipe string is pulled into the hole. The pipe must be securely gripped, including a swivel and possible breakaway link. Truly international membership currently comprising 13 member companies: Borealis, Borouge, FPC, INEOS O&P, IRPC, Korea Petrochemical IND. Scope, referenced documents and terminology. startxref At the surface a receiver (usually a hand-held. It was reissued in 2005 and 2011, and previously reinstated in 2020. Preliminary site investigation (Section 4). [citation needed], Directional boring is used for installing infrastructure such as telecom and power cable conduits, water lines, sewer lines, gas lines, oil lines, product pipelines, and environmental remediation casings. Horizontal directional drilling (HDD) is a trenchless construction method used to install pipes underground without disturbing the ground surface. Because the operator of the drilling rig might not notice a momentarily excessive pulling force, a load link inserted between the swivel and the PE100 pipe to record pulling load can be used to record the maximum axial load exerted on the pipe. Pipe reaming, also known as pipe eating, is a trenchless pipe replacement technique that removes the host pipe while at the same time installing a new replacement pipe. as referenced in the 2022 edition of ASTM F1962. 0 CANTEX's CAN>LOC and CAN>GRIP systems offer many benefits over HDPE, which is the conduit most used for HDD applications. The staging of larger diameter and longer pipelines may require the use of pipe rollers and other facilities to ensure the pipe is not damaged during pull-back. 0000010170 00000 n Day 1 Equipment Arrives Days 2-5 Locate and identify utilities . First, a pilot bore is made with a suitably sized drilling rig. While considered convenient and practical to apply by experienced engineers for a maxi-HDD operation, the overall ASTM International F1962 procedure and guidelines represent a relatively extensive, tedious process, when considering smaller, lower cost operations associated with typical mini-HDD applications. Including River Crossings. to facilitate typical operations. The construction area is relatively small and the construction period is relatively short. ~U4chn~ _ 1.2 QUALITY ASSURANCE Experience: Actively engaged in horizontal directional drilling for minimum of 3 years. 757 0 obj <>/Filter/FlateDecode/ID[<818473D849B370E99276959C150446C3><5862925C0F04774D9936C4C2CD7CF8D7>]/Index[745 21]/Info 744 0 R/Length 69/Prev 35703/Root 746 0 R/Size 766/Type/XRef/W[1 2 1]>>stream
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