Directional drilling is a process of directing a well. The wellbore friction, torque and drag, between drill string and the wellbore wall is the most critical issue which limits the drilling industry to go beyond a certain measured depth. Formulas and calculations for drilling, production, and workover, all the formulas you need to solve drilling and production problems, fourth edition. Directional drilling is not only used for oil and gas wells but is also used for utilities such as pipelines. Build up a vertical section is drilled, then, starting at the kick off point, the angle of incidence to the vertical is. Directional drilling is the methodology for directing a wellbore along a predetermined trajectory to a target. In this section ill discuss about one of the most important term related to directional drilling dog leg severity, abbrivia. Surveying is an inseparable part of directional drilling. Get ebooks directional drilling on pdf, epub, tuebl, mobi and audiobook for free. Locations the relative locations of the target and relief wells are calculated. This chapter presents basic calculations used in the field of drilling fluids. He was a contributing author to the underbalanced drilling manual published by gri. A threedimensional mathematical model of directional drilling.
One source reported that the number of units in use increased by more than a hundredfold in the decade following 1984. This data includes the productpipe material properties, the drillingfluid properties, and any code or design factors that are applicable. In practice, directional drilling is the practice of drilling nonvertical wells. Free download ouija board directional drilling excel spreadsheet this is really useful. There are more than 1 million books that have been enjoyed by people from all over the world. Provisory 07 dec 96 confidential directional drilling 225. Thus, to get the well horizontal, directional drilling is utilized to influence the path of the wellbore. Comparison between diffeernt directional survey calculations methods the directional survey results are compared against those from the minimumcurvature method, as shown in below table. The trenchless technique horizontal directional drilling soil related risks and risk mitigation.
Arc length of a pipe needed for a directional drill. Figure 1 shows the main parameters of a directional well. The aim of this paper is to focus on some basic terms definitions and simple practical calculations. An introduction to directional drilling free download as pdf file. Directional drilling is a fairly new concept when putting pipe in the ground. Vertical wells are usually defined as wells with an. Directional drilling positioning calculations request pdf. Directional drilling is a broad term used to describe any boring that doesnt go in a straight line vertically down. The shortrange response is associated with the dimensions of the bit, the small scale of 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. The hdd equipment arrives on site aboard multiple trucks. The first step in calculating the estimated pulling loads is to develop the input data that will be used in the calculations. Aug 14, 2018 directional drilling is a broad term used to describe any boring that doesnt go in a straight line vertically down. Directional drilling formulas software mitcalc technical formulas v.
Directional techniques are used to drill relief wells in order to kill blowout wells. Directional drilling technology plays an important role especially because the horizontal wells have increased oil production more than twofold during recent years. This drilling will commence until the drill front is approximately 100 m above the target. Workshop on directional drilling in the rocky mountain region november getcheswilkinson center conferences. May 14, 2020 the first step in calculating the estimated pulling loads is to develop the input data that will be used in the calculations. 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. Since the seventies deltares has been involved in the development and execution of trenchless technologies. Determine the length of pipe needed to perform a directional drill.
Basic equations mud weight, specific gravity, hydrostatic. 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. Directional drilling apps for drilling and workover. Scribd is the worlds largest social reading and publishing site. All the formulas you need to solve drilling and production problems, third edition, provides a convenient source of reference for oil field workers who do not use formulas and calculations on a regular basis. Free downloadable ebooks on conventional drilling, directional drilling, blowout and well control horizontal and directional drilling richard s. Request pdf on nov 1, 2019, tuna eren and others published directional drilling positioning calculations find, read and cite all the research you need on researchgate. Provisory 07 dec 96 confidential directional drilling 2 25. Calculating the pull loads horizontal directional drilling. You will be redirected to the full text document in the repository in a few seconds, if not click here. Find, read and cite all the research you need on researchgate. Windowsbased software for directional drilling calculations. This data includes the productpipe material properties, the drilling fluid properties, and any code or design factors that are applicable. Directional drilling an overview sciencedirect topics.
These calculations include increase mud density, dilution, mixing fluids of different densities, oilbased mud calculations, solids analysis, solids fractions, dilution of mud system, displacementrequiring barrels of waterslurry, evaluation of hydrocyclone, and evaluation of the centrifuge. Directional drilling is commonly used for drilling. Formulas and calculations for drilling, production, and workover. Real time torque and drag analysis during directional drilling. The emphasis is on the theory behind these drilling elements in order to develop a greater understanding of the principles involved in drilling a. Directional drilling formulas software free download. A number of calculation models were found, but the bulk of these models is presented as models that are used to calculate already drilled wells. The trenchless technique horizontal directional drilling. As a geologist working more on horizontal wells of late, i find the directional drilling calculations to be the most useful part of the book. Surveys are recorded at regular intervals while drilling.
Directional, horizontal, and multilateral drilling dhd. An example of the input data required for calculating estimated pulling loads is. Complete design details and calculations of the significant parameters and constraints associated with directional drilling operations including, but not limited to. He has authored numerous technical papers on directional drilling and underbalanced drilling.
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. Always update books hourly, if not looking, search in the book search column. Directional drilling survey calculation methods drilling. How to calculating drill depth basic bore planning for. To allow accurate determination of well coordinates at a series of measured depths and determine the current location. Drilling engineering a distributed learning course forward the drilling engineering workbook is a correspondence distributed learning course which covers the important elements of drilling a well. Ouija board is a method that directional drillers use to calculate inclination and azimuth at the bottom or distance and tool face to drill at required direction. That means they should be based on exact mathematical calculation models, to precisely calculate well bore trajectories. Horizontal directional drilling horizontal directional drilling has been used on a large scale since the eighties. An example of the input data required for calculating estimated pulling loads is provided in example 61 later in this chapter. In fact, even in a vertical well, it might be necessary to deviate to avoid a geological formation or a previous stuck pipe, then return to the original path.
The directional drilling survey provides the control of directional drilling of oil wells with calculations and plotting of well planning and survey data in vertical section, plan and xyz views, calculations between two survey stations, easy tools to 2d and 3d wells and plot multilateral wells. Directional diamond drilling definitions, terms and. Drilling numericals rig components, ton miles, circulation, mud pump, drillstring data, bha selection, kick and kill calculations, maasplot, directional well profiles, cementing. Given the data in table 1, we determine the length of pipe needed for the directional drill using three different methods. Note this is how we calculate horizontal displacement or closure from the rectangular coordinates.
Directional, horizontal, and multilateral drilling petroskills. Directional drilling calculations archives drilling formulas and. The drilling machine is assumed to be located at the cartesian coordinate. 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. One source reported that the number of units in use increased by more than a hundredfold in. Pressure gradient pressure gradient, psift, using mud weight, ppg psift mud weight, ppg x 0. Directional drilling commences at the surface as a vertical well. The mathematics of directional drilling bit by bit 0m sea relief targetbed kick off point end of build first bit.
Babalola and others published windowsbased software for directional drilling calculations. 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. He worked for grace, shursen, moore and associates gsm. In this instance, the driller uses sidetracking techniques. The hdd process involves drilling a pilot hole in the horizontal direction towards the other end of the planned route.
Finfinger3 abstract this report describes a project conducted by the bureau of mines in which the accurate directional drilling of a borehole was demonstrated. To measure the inclination and azimuth at the bottom of the hole and hence determine where the well is heading. The more common methods that have been adopted are described in the following paragraphs. We are a mid size company located in houston texas,usa. Horizontal directional drilling plan february 29, 2012. Directional, horizontal, and multilateral drilling dhd mr.
Years of research have resulted in one of the first design codes for horizontal directional drilling, as well as a. Formulas and calculations for drilling, production and. Directional diamond drilling directional diamond drilling is a special method of drilling into the earths surface in order to explore ore bodies by reaching a specific zone or target and controlling borehole trajectory by special means. At this point, there is a hydraulic motor attached between the drill pipe and the drill bit. The minimum curvature method smooths two straightline segments of the balanced tangential method by using the ratio factor rf. Directional drilling advanced trajectory modelling azslide. Directional drilling advanced trajectory modelling core reader. Carden has taught drilling, horizontal drilling and underbalanced drilling seminars in the united states and internationally for more than 20 years. A major drawback of directional and horizontal well drilling is the numerous complex computations required to be done while planning a well. My husband has also found it useful for writing software for the oil and gas industry. The objective of this project is to achieve all necessary survey calculations of the well. Pdf windowsbased software for directional drilling calculations. Large errors are seen in the tangential method for only approximately 1,900 ft of deviation. Same as drilling directional oil well starts verticalends horizontal.
Directional drilling has proven technically and economically feasible in a broad range. One source reported that the number of units in use increased by more than a hundred. Directional drilling the promise and the peril alfred w. For example, directional drilling is often used to install pipelines below roads or rivers. May 07, 2016 free download ouija board directional drilling excel spreadsheet this is really useful. This is a form of trenchless digging and is used most often when digging and putting in pipe the traditional way open cut is not possible. Directional well planning and trajectory design calculations modern drilling technology class report zahoro athumani, cug directional well planning and. When the drill head emerges on the other end, a back reamer is attached to the string and pulled back through the hole. Always update books hourly, if not looking, search in. Formulas and calculations for drilling production and workover 2e. Formulas and calculations 3 chapter one basic formulas. Hdd pilot hole operations are not unlike those involved in drilling a directional oil well.
Pdf most complex well trajectories usually have bends and turns. Directional drilling has proven technically and economically feasible in a. Pdf formulas and calculations for drilling production. Sohrab zendehboudi phd, alireza bahadori phd, ceng, in shale oil and gas handbook, 2017. An introduction to directional drilling oil well nature.
Jan 11, 2017 the aim of this paper is to focus on some basic terms definitions and simple practical calculations. The ct used was 278 with a total capacity of 5200 and had a heptacable wireline pumped through to allow wireline connection for power and data transfer to the bha. Formulas and calculations for drilling, production, and. Directional wells are drilled with intentional control to hit a predetermined target with the aid of controlling inclination angle and azimuth direction. Powered by schlumberger oilfield glossary, a ed work of schlumberger. Pdf formulas and calculations for drilling production and. Directional drilling is drilling in three dimensions 3d bourgoyne et al, 1991.
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