horizontal directional drilling hdpe pipe horizontal directional drilling hdpe pipe

The procedure is straightforward and has been incorporated into various software tools, as an engineering and design aid for such projects. For larger diameters, and in rock, the drilled material must be removed from the bored hole as drilling and reaming progresses. Successive reamers of increasing diameter are used until the bore is of sufficient size to accept the PE100 pipe. Horizontal directional drilling (HDD) is a cost-effective method for installing polyethylene (PE) gas pipe in urban and congested suburban areas, and many gas utilities have come to appreciate its advantages. 0000019826 00000 n 349 0 obj <> endobj Fluid exhaustion associated with smaller bores is proportionally less as well. Relevant material properties for PE pipe, such as safe pulling tension/stress, are also provided in the document. Our site uses cookies necessary for its proper functioning. Generally, the term Horizontal Directional Drilling (HDD) is intended to describe large/maxi sized drilling rigs, large diameter bores, and crossing lengths in terms of thousands of feet. 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. xb```c````e`` @v @s@( LTo18R(l1kUpaqHO(>HHblBU2f$,G.9|lL7. 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. Section includes requirements for Horizontal Directional Drilling (HDD) of High Density Polyethylene (HDPE) Pressure Sewer pipe. The intermediate horizontal segment, L, , may be of zero length. ASTM F 1962 provides formulae for determining the buoyant weight under various conditions. 4487 0 obj <> endobj The technique is routinely used when conventional trenching or excavating is not practical or when minimal surface disturbance is required. 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. 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. sufficient tensile strength to meet the required tensile forces, based 745 0 obj <> endobj hb```i|@Y8Ldhp`iPpgpg#LK:pt2&55/a?aOJ3h13(81dU 8vk& 47kQK\ V'Pj{r e7*fp7D ~aKr+dXi-@%q[cqSxj'VJmxj U[z'. [citation needed], Horizontal directional drilling is done with the help of a viscous fluid known as drilling fluid. It should first be allowed to reach mechanical and thermal equilibrium, to avoid shrink back onto the bore hole. HDPE water pressure pipes can be connected by a process called butt fusion, where the ends of the pipes are heated and joined together. Image Courtesy: Exova Utilities, Large "maxi" drilling rig. 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. Joints in traditional piping materials are the biggest source of leakage. 0000029587 00000 n HDPE pipe are widely used for trenchless sewer lateral replacement. Figure 2. Trenchless technologies, such as horizontal directional drilling, pipe bursting and slip lining allow the entire water supply and drainage system of a city to be replaced without causing a major traffic jam and incurring the enormous cost of restoring streets and roads. International, Inc., 2015, pg. Horizontal Directional Drilling Plan - February 29, 2012 . The physical properties of the PE4710 material allow greater pulling forces and also provide greater resistance to collapse. In the absence of ballast, the maximum total calculated tension will typically occur towards the end of the installation; e.g., at point C or D. The net resulting peak tensile stress is required to be less than the safe pull tensile stress of the HDPE pipe. trailer Next, the bore created during pilot hole drilling is enlarged to a diameter that will facilitate installation of the desired pipeline. Horizontal Directional Drilling (HDD) Calculator with HDSS or TR FLEX Pipe Horizontal Directional Drilling / Trenchless Applications and Pulling Heads Frequently Asked Questions (FAQs) News About Us History Our Vision, Our Mission, Our Values Our Leadership About Quikrete Industry Links Terms & Conditions of Sale/Purchase Website Conditions of Use Monitoring and contingency planning should be in place prior to and during drilling below or in the proximity of environmentally sensitive locations. 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. Chapter 12 Horizontal Directional Drilling 416 borehole on pullback. North American Society for Trenchless Technology (NASTT), (2008). hbbd```b``k$T "7> Pipe entry point is at the opposite end of the drill rig location, which coincides with the pipe exit., shows the drilling operation proceeding from right to left, in contrast to. 0 %PDF-1.6 % 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. path, and other project variables, to determine the Calculated Tensile W9 ]9-j?aV088I Typical Maxi-HDD Route (Obstacle or River Crossing) (Courtesy of Outside Plant Consulting Services, Inc.), FIGURE 5. several outputs are shown simultaneously, along with a summary of the Directional Drilling Directional drilling is the drilling of non vertical wells. 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. 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. They also have many advantages in terms of cost-effectiveness, minimal impact on the environment, and safer processes. 1.2 QUALITY ASSURANCE A. This information is transmitted through the wire-line fitted within the drill string. For standardization of the techniques, different trenchless technology promoting organizations have developed guidelines for this technique. printed as a PDF file or as a paper file. Problematic soil conditions include large grain content in the form of coarse gravel, cobbles, and boulders. Nominal pressure (PN) is based on C = 1,25 and an operating temperature of 20C. In addition to external pressures, due to the head of the relatively dense drilling fluid/slurry or subsequent (post-installation) soil loads, the pipe must withstand the axial tensions induced during the pullback process. NyPipe offers quality products, competitive pricing and reliable service. The pipe bursting method is in full compliance with all federal regulations and guidelines. When new pipe is to be installed or it is not possible to rehabilitate a pipe, so that it needs to be replaced but is in a congested area of buried infrastructure so that conventional methods such as bursting cannot be used safely, then a new or replacement PE100 pipe can often be installed by horizontal directional drilling. Pipe entry point is at the opposite end of the drill rig location, which coincides with the pipe exit.. What truly separates HDPE from other pipe materials is that when it is fused together (using a wide variety of standard and custom components, fittings and joining systems) it creates one homogenous system that matches the same technical and environmental specifications as the HDPE pipe. 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. This material is significantly tougher than older, previous polyethylene (PE) products, facilitating successful completion of more complicated, difficult maxi-HDD projects. 0000020956 00000 n These units may be capable of anywhere from 5,000 lbs to 100,000 lbs of thrust/push force and may be used for spanning between a house basement to a nearby shared water pipe. Along with the recent developments in drilling equipment and operator expertise, there has been, and will continue to be, a dramatic increase in the installation of water and sewer systems using directional drilling. As-built drawings must be provided, preferably supplemented with details of the soil characteristics and drilling operation. First, a small diameter pilot hole is drilled along a directional path from one surface point to another. Lighter, stronger and cheaper to transport and install resulting in projects delivered on time and on budget; Joins seamlessly using heat fusion techniques resulting in less down time and less fittings and one continuous, permanent leak proof system; Lowimpact installation practices such as horizontal directional drilling and other trenchless operations result in minimized social disruption and reduced construction costs; Highly flexible and can withstand stress and as a result can conform to earth movements due to earthquakes and ground shifts without pipeline cracks or leaks; Impact and fatigue resistant resulting in increased life cycle performance and decreased tangible capital asset management costs over time; High performance resins, such a s PE 4710, make the pipe corrosion and chemical resistant resulting in pipes that last longer and perform better; Accepts repetitive pressure surges that significantly exceed the static pressure rating; Environmentally friendly and uses less energy to manufacture. [citation needed], The process starts with the receiving hole and entrance pits. For such cases, the buoyant weight of the submerged pipe, in combination with the corresponding frictional characteristics, is the major factor in determining the required pull force. 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. 0000029623 00000 n %%EOF 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. B. The theoretical basis of the formulae for estimating the required pulling force is provided below. 0000009157 00000 n to facilitate typical operations. The PE100+ Association promotion of quality relies on the principle of rigorous quality control done by external, independent test institutes. Large "maxi" drilling rig. Pipeline geo-environmental design and geohazard management. Pipefusion is a supplier of high density polyethylene pipe (HDPE) available in solid wall, perforated, profile wall, insulated and gas applications. Directional boring offers significant environmental advantages over traditional cut and cover . Those directly related to the setup and operation of the maxi-HDD equipment (machine and hydraulic operations, as well as the drilling fluid under high pressure). 0000016763 00000 n Where cables and other utilities are identified in close proximity to the proposed alignment they should be exposed so that progress of the drilling can be monitored and stopped if required. Weight is calculated using DN and Minimum wall plus 6% for use in estimating fluid flow. [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. International, Inc., 2015, pg. 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. must be consistent with the steering capability of the maxi-HDD equipment, and the bending capability of the drill rods. [4], The equipment used in directional boring depends on the length of the (proposed) crossing, the pipe properties (of the to-be-installed pipeline), and the (anticipated) subsurface conditions. Residential neighbourhoods remain unscathed, commercial districts do not have to deal with loss of business, and rural regions remain undisturbed. The intermediate horizontal segment, L3, may be of zero length. FIGURE 2 illustrates a typical geometry for a maxi-HDD operation, in this case corresponding to a river crossing. h4~r However, the latest revision of ASTM F1962, approved in 2022, contains a significant change by providing the physical properties for the most-recent, high-density polyethylene (HDPE) material, PE4710. 0000000016 00000 n It is designed to be maintenance free as there is no need for man-entry maintenance. for a specific application. Drilling fluid holds the cuttings in suspension to prevent them from clogging the bore. [2], Directional boring/HDD is generally accomplished in three principal phases. 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. As the name denotes, trenchless technology requires few or no trenches to be dug for the maintenance work to be done and can be defined as, A family of methods, materials, and equipment capable of being used for the installation of new or replacement or the rehabilitation of existing underground infrastructure.. The pipe must be appropriately aligned with the bore and at an appropriate bending radius to avoid any risk of kinking. Allowable pulling loads are based on a minimum tensile yield strength of 3,500 pounds per square inch (psi), with a significant reduction to limit non-recoverable viscoelastic deformation, as well as account for the effective cumulative load duration on the pipe (assumed to be 12 hours), resulting in a safe pull stress of 1,330 psi. The recent (2022) edition of ASTM F1962 has revised the relevant physical characteristics of the PE materials, providing the physical properties for the most recent high density polyethylene (HDPE) material, PE4710. Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications. 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. 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. 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. That is, the soil is being cut and or removed under the influence of high pressure fluid. Chapter 12 of the Plastic Pipe Institute (PPI) Handbook of Polyethylene Pipe, TR-46, Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of High Density Polyethylene Pipe. Although the TR-46 guidelines are primarily intended for mini-HDD operations, depending on the particular project, the information may also be applicable to a midi-HDD installation. The methodology of advancement also varies somewhat between soil and rock crossings. Unnecessarily large curvatures (sharp bends) also contribute to bending stresses in the HDPE pipe, but generally are not significant for such a flexible product. At a minimum, it should be able to provide the necessary pulling force, based on the estimated required pulling force for the pipe itself, with possible additional capacity for accomplishing reaming. ASTM International F1962, Standard Guide for Use of Maxi-Horizontal Directional Drilling for Placement of Polyethylene Pipe or Conduit Under Obstacles, Including River Crossings, provides recommended procedures for the placement of PE pipe using maxi-HDD. Horizontal Directional Drilling B&B Supply, Inc. provides you with the equipment and supplies you need to bore it right the first time. 450046. Although ASTM F1962 is intended for carefully designed, well-controlled maxi-HDD installations, the methodology has been extended, via appropriate assumptions and mathematical simplifications, to provide a simpler methodology that may be advantageously applied to typical, less-controlled mini-HDD projects. 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 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. Directional boring and HDD are similar in some respects to directional drilling associated with the oil industry, however, an equal comparison cannot be drawn as the procedures serve markedly different functions. 0000029482 00000 n ASCE Pipeline Design for Installation by Horizontal Directional Drilling, CAPP Planning Horizontal Directional Drilling for Pipeline Construction, MAB-07 (2020) - MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in Municipal Applications, Slavin, Larry and Petroff, Larry (2010). The plastics pipe industry is a strategic industry, where hardware needs to be reliable for extended periods of time. UI. Horizontal Directional Drilling, Pipe Bursting, Microtunnelling and Pipe Jacking, Rev 1, February 2010; b. 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. ?5Hb0CB$ 17C``!Dc@ q 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. 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. Bearing forces resulting from (previously induced) tension tending to pull the pipe snugly against any curved surfaces (capstan effect). Membership; Articles; Analyses . 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. ((H`|JSgy>_)gk]f2%a!gS0qF&)0C@WF%`cJ!Q8x`1f'H#\oe5MaKR28(.n3Z1CUjGTC+o0kBJ0N t-A K:Xyd89EtL}vfAhdQ;>!E@y@}[hE_8 . H0+X u7A@>&F 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. In many instances, smaller bores do not require the use of drilling fluid, only water, and in even less significant bores no fluids at all. Tensions induced in the PE pipe, as it passes any curve, become amplified because the tensile forces tend to pull the pipe against the curved surface. As the hole is bored, a steel drill string is extended behind a cutting head. Directional drilling is the drilling of non vertical wells. The HDPE pipe should not be cut prematurely. He can be reached at lslavin@ieee.org. Output can be emailed directly from the Calculator, or Now Available: ASTM Guide for Use of Maxi-HDD Placing HDPE Pipe Under Obstacles. cut-and-cover and horizontal directional drilling (HDD) techniques are used to install utility pipes under flexible pavements. This method applies tension to the PE100 pipe during installation. The drilling mud lubricates and cools the drilling tools, as well as providing support to the periphery of the bore. 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. 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. HDD Analyser is a comprehensive program for the design analysis of pipelines crossings by horizontal direction drilling methodology. Fluid can be pumped through the drill rods and out through jets in the bit to assist the operation. Typical Entry Site Layout. 0000000936 00000 n 19), PR-277-144507-Z01 Installation of Pipelines by Horizontal Directional Drilling Engineering Design Guide (Arlington, VA: Pipeline Research Council 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. ABOUT THE AUTHOR: 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. The primary focus is on commonly used high-density polyethylene (HDPE) pipe with a material designation code of PE4710. 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. Pressure capability is dependent upon pipe SDR and is not a function of the method. Uncontrolled or unguided drilling can lead to substantial destruction, which can be eliminated by properly locating and guiding the drill head. The stiffness of the steel drill rods determines their allowable curvature, in order to avoid fatigue. 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. CANTEX's CAN>LOC and CAN>GRIP systems offer many benefits over HDPE, which is the conduit most used for HDD applications.