Over the last two decades, contractors have increasingly turned to the horizontal directional drilling (HDD) method. The MGS, even without the use of the wire grid, has been accurate to over 2km with an accuracy of 2% at depth. High-density polyethylene (HDPE) conduit is the preferred material to house and protect electrical power and telecommunications cables within. The driller increases the diameter according to the outer diameter of the conduit and to achieve optimal production. \K~[QvKnoD>3QV,0rl!BgH;h#cl{Y u~\L5>?t=aX`GS]r@r&{BO9wj_ 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. Table X3.1 provides the critical collapse pressure for HDPE/PE4710 pipes as a function of load duration and wall thickness. The Conduit Design Calculator automates the Mini-HDD calculations described in PPI TR-46 Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of High Density Polyethylene Pipe. While ASTM International F1962 may be purchased from the ASTM International website (www.ASTM.org), the overall guidelines, including preliminary investigation and implementation procedures, as well as the detailed design methodology for selection of the proper pipe strength, are reflected inChapter 12 of the Plastic Pipe Institute (PPI) Handbook of Polyethylene Pipe, In addition, the ASTM International F1962 methodology is now available in a free online tool designated asPPI BoreAid. Pipe manufacturers can advise on the allowable loads. printed as a PDF file or as a paper file. The output of the Calculator can be used to assist the User in Directional Drilling Directional drilling is the drilling of non vertical wells. Once the bore has been completed and reamed to the required diameter, the PE100 pipe is prepared for pull-back by attaching the end to a pulling head, swivel, reamer and drill rods at the drill exit point. 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. Large "maxi" drilling rig. A clogged bore creates back pressure on the cutting head, slowing production. Although pipe stiffness effects may generally be ignored for flexible PE pipe, there is a potentially important effect can be due to route bends or any path curvature of significance. Drilling mud is used to cool the cutter and transmitter electronics, to flush excavated soil from the borehole and to lubricate the borehole. It should not be used in place of the advice from a licensed Professional Engineer. Recycled water pipeline completed in Encinitas, Calif. Nominal pressure (PN) is based on C = 1,25 and an operating temperature of 20C. Corresponding changes to the document, if any, were minimal, including providing additional or updated references. ASTM F1962 is the only available ASTM standard for HDD. 0000016763 00000 n Thus, FIGURE 2 shows the drilling operation proceeding from right to left, in contrast to FIGURE 1, where the drilling proceeds from left to right. F1962 Standard Guide for Use of Maxi-Horizontal Directional Calculator allows, users are recommended to review PPI TR-46 and/or ASTM New York, NY: ASME, 2008. 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 pilot bore is created using a drilling head, which in its simplest form has a slanted face, and this is pushed and rotated by long high tensile flexible drill rods. ?5Hb0CB$ 17C``!Dc@ q 0000021965 00000 n This material is significantly tougher than older, previously used PE products, facilitating successful completion of more complicated, difficult maxi-HDD projects. The pipe must be securely gripped, including a swivel and possible breakaway link. 0000000016 00000 n Installation lengths are typically 30m and greater. Actual ID will vary. must be consistent with the steering capability of the maxi-HDD equipment, and the bending capability of the drill rods. There are three types of locating equipment for locating the bore head: the walk-over locating system, the wire-line locating system and the gyro guided drilling, where a full inertial navigation system is located close to the drill head. MAB-08 (2022) - MAB Guidelines for Fusing HDPE Pipe in Cold and Inclement Weather, Horizontal Directional Drilling Estimating Pipe Pulling Tensions, Dr. Lawrence M. Slavin, Aug 2022. Horizontal directional drilling (HDD) consists of several installation steps. selecting the most appropriate wall thickness of HDPE conduit to be used The plastics pipe industry is a strategic industry, where hardware needs to be reliable for extended periods of time. The operator of the MGS communicates with the driller and guides him towards a predetermined engineered drill path. Slavin, Larry and Scholl, Jeff (2014). With a magnetic guidance system (MGS), the tool reads inclination and azimuth. It is conducive to protecting the environment and does not affect the normal passage of roads. 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. hb```i|@Y8Ldhp`iPpgpg#LK:pt2&55/a?aOJ3h13(81dU 8vk& 47kQK\ V'Pj{r e7*fp7D ~aKr+dXi-@%q[cqSxj'VJmxj U[z'. Joints in traditional piping materials are the biggest source of leakage. 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 image above shows a straightener re-rounder being used on a 180mm pipe, and whilst it is in the trench here, it can be attached to the coil trailer if so desired. He can be reached at lslavin@ieee.org. DNVGL-ST-F101: Code Check ; ASME B31.4/B31.8 Code Check . Now Available: ASTM Guide for Use of Maxi-HDD Placing HDPE Pipe Under Obstacles. 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. The pipe string is attached to the back-reamer through a swivel device. NyPipe offers quality products, competitive pricing and reliable service. sufficient tensile strength to meet the required tensile forces, based Pipeline Design for Installation by Horizontal Directional Drilling -. It offers unmatched corrosion and chemical resistance, is flexible, durable and available in long reel lengths to reduce joints and installation time. Directional boring can be utilized to cross any number of surface obstacles including roadways, railroads, wetlands, and water bodies of varying sizes/depths. PART 1 GENERAL 1.1 DESCRIPTION Section includes requirements for Horizontal Directional Drilling (HDD) of High-Density Polyethylene (HDPE) Pressure Sewer pipe. Safe for the environment, recyclable and does not emit hazardous toxins during manufacturing or installation. The procedure is straightforward and has been incorporated into various software tools, as an engineering and design aid for such projects. Typical Maxi-HDD Operation (Courtesy of Murphy Pipeline Contractors), FIGURE 2. 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 as well as possible bends in the horizontal plane, should be avoided, and will increase the required pulling forces. 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. 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. %%EOF Whilst the drilling equipment is able to drill down from the surface at the start and come back up to the surface at the exit, there does need to be an excavation at each end to act as a sump for drilling fluid reclamation, but the most critical factor is to provide the space to transfer the new pipe from ground level down to the bore, and this will depend upon both the diameter and length of the installed pipe. Drill bit location for smaller and shallow installations is typically transmitted by a battery powered sonde, located just behind the bit, the signals being picked up by a receiver operated at the surface. Mini-HDD applications, for instance, tend to contain bore paths with additional curvature because of the need to avoid known obstacles or follow a curved right-of-way, as well as more subtle curvature due to path corrections characteristic or typically less precisely controlled installations. 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. HDPE conduit, also known as PE conduit, is the preferred material to house and protect electrical power and communications cables in typical applications such as power utilities, telecommunications, CATV, SCADA, FTTH, ITS, highway lighting, and other underground utilities. The reamer's diameter depends on the size of the pipe to be pulled back through the bore hole. 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. 4506 0 obj <>stream One of the reasons why HDD is so effective is because directional boring contractors utilize polyethylene pipe. Horizontal Directional Drilling Plan - February 29, 2012 . Safety is a primary concern, during any activity, including construction utilizing maxi-HDD equipment and procedures. Add: 13th F, Longyu International Building, Zhengzhou Area(Zhengdong), China(Henan) Pilot Free Trade Zone. 4487 0 obj <> endobj There is no request too small or job too complex. 3), PR-277-144507-Z01 Installation of Pipelines by Horizontal Directional Drilling Engineering Design Guide (Arlington, VA: Pipeline Research Council Figure 2. Any pipe installed by HDD is subject to loads of a different type and/or magnitude than are experienced in other construction methods, including by direct burial in a trench. Alternate materials will require prior approval. Once the User enters the required Input data and clicks Calculate, UI. for a specific application. 0000002230 00000 n [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. These may include the need to file environmental, health and safety plans, or permits for passing beneath waterways, and there may be special requirements for drilling beneath railroads. In addition, there should be a detailed subsurface investigation, including test borings and soil analysis, to confirm the general suitability for the drilling operation, and to determine the appropriate equipment and hardware. 0000021613 00000 n It was reissued in 2005 and 2011, and previously reinstated in 2020. Noise and air pollution are also kept to a minimum and rehabilitation time is short. Our mission is to create value by employing innovation, quality and technology to develop a unique and evolving product portfolio; to create employment in our community; and to enrich the lives of our customers with our unique and environmentally friendly products. They are monitored throughout the process to make sure the bore stays open, pumps are not overworked, and uid circulation throughout the borehole is maintained. At the surface, the navigator in the drill cab performs the necessary calculations to confirm the parameters have been met. 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. ;0CKh6sKjrmlq9vwiJ%)m5]UWd Directional boring offers significant environmental advantages over traditional cut and cover pipeline/utility installations. H0+X u7A@>&F 0000002811 00000 n 0000009915 00000 n Including River Crossings. Often used in trenchless applications where digging is difficult or impossible, high density polyethylene (HDPE) pipes have many characteristics that make them the choice product. Which Method to Use When Estimating Maxi-HDD Installation Loads- ASTM F1962 or the PRCI Method. FIGURE 2 illustrates a typical geometry for a maxi-HDD operation, in this case corresponding to a river crossing. HDPE is the safest and most efficient option for sewer pipe replacement. Horizontal directional drilling shall consist of the drilling of a small diameter pilot hole from one end of the alignment to the other, followed by enlarging the hole diameter for the pipeline insertion. 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. %PDF-1.6 % True-Size), Wall Type (DR, SDR or Schedule), Diameter (nominal size), Certain users require weak links that fail before the pipe if overload occurs but this will result in a partly installed pipe with no means of completing the installation without major disruption, cost and delay. Pipefusions years of experience doing on-site fusion for customers from Alert in the arctic circle to the deep south of Texas, guarantees weve seen just about everything and have the experience to complete your project. The two major sources of possible damage to the new pipe are excessive pulling force exerted if the pipe seizes during pull-back as might occur if some of the bore collapses, and scoring by any hard or rock fragments in the bore. Additional route bends, beyond those shown in. It was reissued in 2005 and 2011, and previously reinstated in 2020. [citation needed], The process starts with the receiving hole and entrance pits. FIGURE 2 illustrates a typical geometry for a maxi-HDD operation, in this case corresponding to a river crossing. Preliminary site investigation (Section 4). For the larger diameters typically used for such applications, PE pipe is supplied in discrete segments that are fused together in the field, with essentially no loss in tensile strength, facilitating the pulling operation. Smaller drilling rigs suitable for installation of smaller diameters pipes are self-propelled rigs, typically track mounted, requiring little in the way of additional support equipment. One of the significant contributions of ASTM International F1962 is the provision of a rational, analytical method for selecting the polyethylene pipe strength based upon the estimated installation and post-installation (operational) loads on the polyethylene pipe. This phenomenon is referred to as the capstan effect, as it is the principle of the capstan winch, as illustrated in FIGURE 5. 0000029587 00000 n The drill rig and auxiliary equipment located on the pipe exit side are relatively large, and require water access, storage, and mixing and pumping facilities. 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. 12), Last edited on 12 December 2022, at 19:58, "Fant ny lsning som gir gravefri tilkobling av hus til hovedvannledning", https://en.wikipedia.org/w/index.php?title=Directional_boring&oldid=1127080039, Walk-over locating system A sonde, or transmitter, behind the bore head registers angle, rotation, direction, and temperature data. This is the basis of MAB-7 (2020), MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications, as referenced in the 2022 edition of ASTM F1962.
