Assume that we have a drill rig that can enter the ground entry angle between 10 degrees and 22 degrees above horizontal, drill pipe that cant be placed into a tighter radius. This program can be used to analyze and assess the safety of a given hdd crossing for pipelines during. Every site is unique and every horizontal bore design and installation method should be selected to address the characteristics of the site drawing upon the experience of the engineer and directional driller, as well as. The county reserves the right to require an onsite representative of the directional drilling equipment manufacturer andor a representative of the drilling fluids manufacturer, knowledgeable in the use of the products, for a minimum. Surveying is an inseparable part of directional drilling. The bore is steered to create an initial hole at the required line and grade. Build up a vertical section is drilled, then, starting at the kick off point, the angle of incidence to the vertical is. This data includes the productpipe material properties, the drillingfluid properties, and any code or design factors that are applicable. The components of a horizontal drilling rig used for pipeline construction are similar to those of an oil well drilling rig with the major exception being that a horizontal drilling rig is equipped with an inclined ramp as opposed to a vertical mast.
Keywords drilling fluids management horizontal directional drilling. Horizontal directional drilling hdd is becoming widely accepted in the construction industry as a convenient way to get a pipeline drilling job done with minimum disruption to everyday life. Sep, 2017 horizontal directional drilling hdd is becoming widely accepted in the construction industry as a convenient way to get a pipeline drilling job done with minimum disruption to everyday life. Directional drilling calculations archives drilling formulas and. First, a pilot bore is made with a suitablesized drilling rig. Calculating the pull loads horizontal directional drilling. Horizontal directional drilling can be used to install pipes under an obstruction, such as a road plate 26 c, railway or river. There is also software available that can produce this data. Jun 27, 2018 in order to do this, one must look at the functions of the drilling fluids, the properties of the drilling fluids like viscosity and solids content, the volume of fluids being pumped, and the rate or speed of drilling. Directional, horizontal, and multilateral drilling petroskills.
He intends to achieve a horizontal departure of 1500 ft at the with the tvd at the target point to be 10,000 ft. Hdd horizontal drilling software compares the planned versus drilled trajectories. Surface location of the drill head also can be used where there is reasonable access. Horizontal directional drilling or hdd, is a steerable trenchless method of installing underground pipe, conduit, or cable in a shallow arc along a prescribed bore path by using a surfacelaunched drilling rig, with minimal impact on the surrounding area. This data is transmitted back to the surface where calculations are made as to the location of the cutting head. Drilling software download free trial downloads try before. Apr 16, 2020 last updated on thu, 16 apr 2020 horizontal directional the first step in calculating the estimated pulling loads is to develop the input data that will be used in the calculations. Coverage of the hdd model footage contract guidelines for hdd projects, example specifications, and information on risk reductionis also included.
Pdf application of minimum curvature method to wellpath. I did not delete the references of original makers of. Now that we know the drill pipe has a minimum bending radius, lets go back and play with. The largest bend radius of either the drill rod or product pipe is the number that must be used for planning and completing the bore. The horizontal section is usually drilled at 90 degrees so the extra equations involved is to get length of the horizontal section to calculate the total well departure and total measured depth. The hdd equipment arrives on site aboard multiple trucks. The well path is then calculated with simple trigonometric functions.
The method uses the average of the inclination and holedirection angles measured at the upper and lower ends of the course length. What were talking about in horizontal drilling vernacular is the setback distance. Horizontal directional drilling and boring 02415 4 immediately. Horizontal directional drilling hdd wells utilize open hole technologymeaning that drilling fluid is required to hold the borehole open during drilling and construction. Hdd directional drilling software %hdd directional drilling. One of the most important tasks of a directional drilling engineer is to navigate the. Often the engineering documents will recommend an annular pressure not to be exceeded. Vertical section is the horizontal distance of wellbore that moves in the direction of the target per each station or in total. Hdd directional drilling software hdd horizontal drilling software. Directional, horizontal, and multilateral drilling dhd mr. Hdd directional drilling software is a new innovated hdd planning program and includes tool face calculations along with charting, the program covers river crossing, hydro power water courses, tunnelling, mining and civil engineering, with a few inputs the software develops all the charting for azimuth, tangents. Calculating fluid volumes, pressures for horizontal drilling.
Horizontal directional drilling features many examples and hdd calculations as well as detailed illustrations. With crews and equipment capable of installing pipelines and conduit bundles up to 60 inches in diameter and to length beyond 4,000 metres, when partnering with us, you get the. It has gained interest mainly due to the fact that hdd projects do not involve digging up entire stretches of roads, though the entry and exit points have to be dug and cordoned off. Horizontal directional drilling hdd design methodology. A major drawback of directional and horizontal well drilling is the numerous complex computations required to be done while planning a well. The calculations of recommended downhole pressures are only as good as the geotechnical reports the contractor has. It means that hydrostatic pressure p, the result of the equation, is expressed in units of psi. Click the blue button in bottom right corner to reach us pipe steel outside diameter. Large errors are seen in the tangential method for only approximately 1,900 ft of deviation. Directional drilling survey calculation methods drilling. Last updated on thu, 16 apr 2020 horizontal directional the first step in calculating the estimated pulling loads is to develop the input data that will be used in the calculations. Locations the relative locations of the target and relief wells are calculated. Design radius of curvature horizontal directional drilling. Horizontal directional drilling hdd is considered as the most applicable and cost effective technology among trenchless technologies known.
Design data pipeline diameter thickness min pipeline material grade smys of pipeline steel density water density soil density mud density. Survey calculations directional and horizontal drilling. Curvature or bur 5730 rc 5730 rc bur tvd rc x sin inc2 sin inc1 vs rc x cos inc1 cos inc2 md rc x 2 x pi x inc2 inc1 rc x inc2inc1 360 57. The contractor shall provide adequate supports along the stringing area to protect the pipe and allow free movement of the pipeline during pullback. The mathematics of directional drilling bit by bit 0m sea relief targetbed kick off point end of build first bit. Directional, horizontal, and multilateral drilling dhd. Tips for calculating setback in horizontal drilling 20151001. Logs must be kept intact referencing all forces exerted on the pipeline during the project. Michels utilized horizontal directional drilling hdd methodology in conjunction with transcanadas northern courier pipeline project. Drill pipe and downhole tools are used to advance the borehole while drilling fluid is used to cool and lubricate the bit, stabilize the borehole, and carry cuttings formation material to the surface fig. Michels is regarded as the north american leader in horizontal directional drilling hdd, and we are determined to stay on top. Complete with a directional drillers tool box covering tool face calculations. Drilling software download free trials and try before you buy. Surveys are recorded at regular intervals while drilling.
Hdd analyser utilizes the user input integrated drill profile to generate the segmentwise length of the individual sections suitable for applying loads. Oct 01, 2015 this starts to raise flags with the horizontal drilling contractor because what the consultant really means is either my site is tiny and im not sure if the rig will fit, or i didnt know that you start drilling at an angle. Drilling numericals rig components, ton miles, circulation, mud pump, drillstring data, bha selection, kick and kill calculations, maasplot, directional well profiles, cementing. Multilateral drilling is where a downhole bore has multiple lateral 90 degrees offshoots. Hdd directional drilling software %hdd directional.
Sep 25, 2015 surveying is an inseparable part of directional drilling. This type of directional well trajectory profile is consist of anyone of the above profiles in addition to a horizontal section within the required target interval. Cyclic productivity for horizontal directional drilling. Directional drilling calculation example drilling formulas and. Richard carden, alan hippman, larry wolfson this course builds a firm foundation in the principles and practices of directional drilling, calculations, and planning for directional and horizontal wells. Important if you are recycling fluid, you must enter a value in the final reampullback box. Guidelines for a successful directional crossing bid package inclination.
Horizontal directional drilling 421 chapter 12 horizontal directional drilling introduction the horizontal directional drilling hdd industry has experienced so much growth in the past two decades that hdd has become commonplace as a method of installation. Horizontal directional drilling consists of several installation steps. Comparison between diffeernt directional survey calculations methods the directional survey results are compared against those from the minimumcurvature method, as shown in below table. Calculation methods for directional survey petrowiki. Sin opp cos adj tan opp hyp opp hyp adj hyp hyp adj sin cos opp sin x hyp adj cos x hyp circles. May be you are having some of these from elsewhere, but it gives me great pleasure to compile all these at one place. Larry wolfson larry wolfson has 34 years experience in planning and supervising well construction, including erd, slimhole and subsea wells. The horizontal directional drilling process the tools and techniques used in the horizontal directional drilling hdd process are an outgrowth of the oil well drilling industry. Years of research have resulted in one of the first design codes for horizontal directional drilling, as well as a. From 12 hdd units manufactured in 1984, about 32,5 units were manufactured and sold in 2011. Horizontal directional drilling hdd company michels canada. Calculating bore path in horizontal drilling 06102008 5. To allow accurate determination of well coordinates at a series of measured depths and determine the current location. Cyclic productivity for horizontal directional drilling hdd.
Horizontal directional drilling design calculation. This is a web site dedicated to all kinds of stuff related to the drilling design and analysis. A common industry standard for determining the design radius of curvature for bends used in hdd installations is to multiply the nominal diameter of the pipe in inches by 100 to determine the allowable radius in. To measure the inclination and azimuth at the bottom of the hole and hence determine where the well is heading. Quickly compute an optimized directional drilling profile with minimal user input towards maximum understandable results. Comprehensive program for the design analysis of pipelines crossings by horizontal direction drilling methodology. The components of a horizontal drilling rig used for pipeline construction are similar to those of an oil well drilling rig with the major exception being.
Drilling calculations spreadsheets in continuation of my spread sheets series for various engineering disciplines of oilgas industry, here is my gift for drilling engineers too drilling calculation spreadsheets. The mathematics of directional drilling my oil and gas. Horizontal directional drilling and boring 02415 2 b. The directional drilling survey provides the control of the directional drilling of oil wells with calculations and plotting of well planning and survey data to help technicians, drillers, toolpushers and engineers of petroleum industry. Drill pipe and downhole tools are generally interchangeable and drilling fluid is used throughout the operation to. Are you looking for horizontal directional drilling calculator. How to calculating drill depth basic bore planning for horizontal directional drilling. Application of minimum curvature method to wellpath calculations. Hdd directional drilling software, the full program. Horizontal directional drilling plan february 29, 2012. Steel product pipe usually has a much larger bend radius than the drill rod. Hdd analyser performs the pipeline stress analysis and hdd design calculation in compliance with the international codes and standards. Guidelines for a successful directional crossing bid package.
Horizontal directional drilling hdd is a versatile trenchless construction method for locations where surface excavations and conventional trenching are not desirable. This data includes the productpipe material properties, the drilling fluid properties, and any code or design factors that are applicable. A number of directional survey calculation methods have been used in directional drilling. Hdd directional drilling software is a new innovated hdd planning program and includes tool face calculations along with charting, the program covers river crossing, hydro power water courses, tunnelling, mining and civil engineering, with a few inputs the software develops all the charting for azimuth, tangents, turns and bends and dog legs. Dear friends in continuation of my spread sheets series for various engineering disciplines of oilgas industry, here is my gift for drilling engineers too drilling calculation spreadsheets.
This plan must also include a detailed description as to contingencies for potential fissures of drilling fluid. Tips for calculating setback in horizontal drilling 2015. The average of the two sets of angles is assumed to be the inclination and the direction for the course length. Hdd can be applied in different soil conditions, for deep laying of different pipeline diameter and long drives. Same as drilling directional oil well starts verticalends horizontal. The above estimated calculations do not include loss of material to. When using horizontal directional drilling hdd technology in a pipeline crossing project, the required pullback force is an important factor in. User is required to provide the input for the integrated drill profile indicated in green color in the above picture. Hdd pilot hole operations are not unlike those involved in drilling a directional oil well. What is the horizontal displacement h from the relief well reached at eob. For example, a well might be metres in depth but have numerous lateral wells connected to it. Please log in or register to perform horizontal directional drilling analysis. Our recordsetting drills are supported by an unrivaled fleet of 20 large rigs with up to 1. Hdd plan is a userfriendly borehole design interface for the unique requirements of the hdd horizontal directional drilling, industry to plan drilling boreholes starting and ending at any inclination and with multiple tangent and curve bend sections applications for this program.
Horizontal directional drilling calculator all about pipelines. It has gained interest mainly due to the fact that hdd projects do not involve digging up entire stretches of roads, though the entry and exit points. There are a few different types of directional drilling. Hdd analyser is a comprehensive program for the design analysis of pipelines crossings by horizontal direction drilling methodology. Hdd calculation template pascal unit stress mechanics. Horizontal directional drilling calculator all about. During the drilling process, a contractor circulates drilling fluids through the bore. Spe disclaims any and all liability for your use of such content.
There are several known methods of computing directional survey. Content of petrowiki is intended for personal use only and to supplement, not replace, engineering judgment. Since the seventies deltares has been involved in the development and execution of trenchless technologies. One source reported that the number of units in use increased by more than a hundred. Hdd directional drilling software hdd horizontal drilling.
For more on horizontal directional drilling, click here. The trenchless technique horizontal directional drilling. The difference between the curvatureradius and minimumcurvature directional survey calculations methods is that curvature radius uses the inclination change for the course length to calculate displacement in the horizontal plane the true vertical depth tvd is unaffected, whereas the minimumcurvature method uses the dogleg severity dls. Michels installed a new 500 metre crossing of nps 30 pipe beneath the river using horizontal drilling technology hdd. The directional drilling survey provides the control of the directional drilling of oil wells with calculations and plotting of well planning and survey data to help technicians, drillers, toolpushers and engineers of petroleum industry category. When the drill head emerges on the other end, a back reamer is attached to the string and pulled back through the hole. Horizontal directional drilling horizontal directional drilling has been used on a large scale since the eighties. Soda ash add when filling water clay cutter after drilling fluid has completely yielded drillterge after polymer has been fully blended into the system disclaimer. Horizontal directional drilling hdd company michels. A common industry standard for determining the design radius of curvature for bends used in hdd installations.
When calculating the net external pressure, the designer will give careful consideration to enumerating all applied loads and. Tips for calculating setback in horizontal drilling 201510. Horizontal directional drilling hdd is a basic trenchless technology that involves drilling into the earth to create a horizontal bore under the surface along a planned pathway through which pipes and conduits may pass. Horizontal directional drilling an overview sciencedirect. Calculations and analysis of pullback force in horizontal. Once the hdd creates a bore of suitable size which may require one or multiple passes by the drilling apparatus the. How to calculating drill depth basic bore planning for horizontal. The program includes a drillers toolbox, directional drilling calculations, hdd tool face plan provides a userfriendly trajectory design interface for the unique requirements of the horizontal directional drilling, industry to plan drilling trajectories starting and ending at any inclination and with multiple tangent and curve bend sections. User controls the average deflection used and depth of the bore through the entry and exit portions of the profile, while this calculator does the rest. This reamer is slightly bigger than the diameter of the. Chapter 12 horizontal directional drilling plastics pipe institute. Now that we know the drill pipe has a minimum bending radius, lets go back and play with the geometry. The hdd process involves drilling a pilot hole in the horizontal direction towards the other end of the planned route.
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