The drill string design evaluates torque, drag, hydraulics and slip crushing. The term is loosely applied to the assembled collection of the smuggler pool, drill collars, tools and drill bit. Drill string design for directional drilling requires accounting for a number of factors. Change 5 8 inch to 3 4 inch in note 4 for pages 15. Fastr landing string system consists of 6 5 8 fh slipproof landing string design that features a 6ft slipproof section which prevents the crushing of the tubular by the fastr slip system.
Fundamentals in drillstring design see api rp 7g recommended practice for drill stem design and operating limits what is a. Adjusted weight refers to the weight per foot of pipe including the upset but excluding the tool joint based on a length of 29. Two criteria are used in the design of tapered rod strings. Dec 11, 2002 separate chapters deal with calculations for drilling fluids, pressure control, and engineering. Basics of drill string design request pdf researchgate. Xls download process, piping, instrumentation, mechanical. Plus the maximum allowable over pull on the selected drill string size at the weakest point. Kill sheets and related calculations kick analysis, annular stripping procedures 5. Bottomhole assembly bha design purpose components assemblies. It also includes casing drill pipehwdctubing specifications and a convenient oilfield units converter. Reducing costly failures with advanced drillstring modeling. Drill string in the borehole drill string design for directional and horizontal drilling requires accounting for a number of factors. Casing design methodology for casing while drilling tu delft.
Design and exploitation problems of drill string in. This chapter presents basic calculations used by oilfield personnel. The drill string configuration for vertical boreholes requires an one calculation cycle. This chapter presents the fundamental friction dynamics of drill string and sucker rod string. The model assumes that sliding friction forces result from contact of the drill string with the wellbore. This section of the drilling manual discusses drill string care and use and gives examples of the types of problems usually encountered when the drill string is improperly used or used beyond its.
Variations in mud rheology and flow rates from depth in to depth out. Determination of drill collar and or hwdp length 4. Addendum 1 to recommended practice for drill stem design and operating limits 1 page 3, 4. Drill pipes the design process shall address the following items. Drill string design drill pipe pressure control equipment drill string loads monitoring equipment 2 3. Formulas and calculations for drilling, production, and workover, all the formulas you need to solve drilling and production problems, fourth edition. Drill pipe pressure control equipment drill string loads monitoring equipment. Pdf drillstring with aluminum alloy pipes design and. Methods of measurement have been proved useful for determining the stuck points, but these operations take considerable time. Drilling software download free trial downloads try before.
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. Component balanced 4inch drill pipes for 6inch holes. Drilling fluids mud density, mixing fluids, solids analysis 4. Introduction the drillstring design is the mechanical linkage connecting the drillbit at the bottom of the. An optimum drill string design is the one that meets all of the operational parameters, for given drilling constraints and conditions, and considers rig pipe management. Casing design from surface to current casing point.
Well section calculations drilling software calculates the hole volume, annulus volume, and drill pipe volume as well as the annular velocity in each hole section for holes with 2, 3, 4, or 5 sections. Part of this destruction force is obtained by a certain amount of weight on bit wob which forces the bit against the rock. The course provides a comprehensive treatment of drill string design as well as the avoidance of operational problems and wear on equipment following the api recommended practices for design and operating limitations as well as the standard ds1 for design and inspection. The drill pipe has two tool joints, one female is called a box and the other male is called pin. Change 5 8 inch to 3 4 inch in note 4 for pages 15 17, most corrections for table 10 are in. We are constantly updating our materials to reflect the latest technology applications for both nearvertical and highangle well designs while maintaining a thorough grounding in the fundamentals. Dpt drill string and bha design schlumberger private. Bottom hole assembly bha the primary component of the bha is the drill collar. The same procedure used to obtain the dimensionless form of the governing. Derrick sizing the static load is determined from the maximum drilling depth and load that the rig will carry to that depth. Pdf design and exploitation problems of drill string in. Recommended practice for drill stem design and operating. Casing design design criteria tensile force tensile forces in casings originate from its weight, and shock loading.
Oilfield assistant gathers over 100 calculations equations from the oil and gas world. Identifying the limits of drillstring design the primary focus of cfd is drillstring design. Pdf formulas and calculations for drilling production. We are constantly updating our materials to reflect the latest technology applications for both nearvertical and highangle well designs while. This edition includes additional coverage on cementing, subsea considerations, well hydraulics, especially calculating for hydraulic fracturing methods, and drill string design limitations. The main advantages of omitting drill collars in inclined wells are. Sucker rod string an overview sciencedirect topics. The first step is to determine the depth at which the sticking has occurred. We have been presenting drill string design workshops for over 12 years for all types of operations around the world.
Jul 16, 2011 a stuck drill string results in a major nonproductive cost in extended reach drilling engineering. Heavy weight drill pipe use minimum number of drill collars in the bha. These efforts have allowed for developing and introducing. Recommended practice for drill stem design and operating limits. Formulas and calculations for drilling, production and. Formulas and calculations for drilling operations request pdf. Furthermore, it highlights some limitations of drill string design and explains some tonmile tm calculations. The drilling engineering workbook is a correspondence distributed learning course which covers the important elements of drilling a well.
Current development on drill string and bottomhole assembly design. Drillstring design manual strength of materials bending scribd. In particular, the effect of the drill stem bending may be much less when drilling soft formations, while the hard formations require high bit weights. Xls download process, piping, instrumentation, mechanical, drilling and civil design spreadsheets posted by akki on 6.
Dec 08, 2015 the drill pipe constitutes the majority of the drill string length. The program only requires entries for the gallons per minute pumped, the casing or hole id, and the drill pipe od. Over 500 spreadsheets for mechanical and civil engineeringfree download 24 august 2018 off by the engineering community here a big list of spreadsheets available for download from piping, process, instrumentation, mechanical, drilling and civil. Concepts, modeling, and analysis connected with friction dynamics are presented, including advances in knowledge of the toolrock. Drill string drag definition and calculations drilling. Download formulas and calculations for drilling, production. 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.
Rotation and weight on bit are essential for breaking rock and making hole. Use features like bookmarks, note taking and highlighting while reading formulas and calculations for drilling, production and workover. The first thing to consider while running the drill string design calculation is to check if the drill pipes you are going to use will be able to sustain the the drill collars and bha loads in the worst cases which is the stuck. If bending stiffness is also included, such a procedure fails since the order of the differential.
The design of a drill string or selection of drill pipe size, weight and grade is based on three parameters. The formulas and calculations are provided in either english pdf field units or in metric units. Annular capacity between casing or hole and drill pipe, tubing, or casing. Under thus, it takes a look at useable volume per bottle, surface application, deepwater applications, and accumulator precharge pressure. Subsequently, it explains some cementing calculations and stuck pipe calculations. Directional, horizontal, and multilateral drilling dhd. To drill a well, the rock beneath the bit has to be destroyed. Drill string drag calculations in deviated hole in a curved section of the wellbore where inclination and azimuth change across the section, the calculation of the drag force is more difficult.
Drillstring design fundamentals in drillstring design see. Basic calculations capacity, drill string design limitations, stuck pipe calculations 3. The emphasis is on the theory behind these drilling elements in order to develop a greater understanding of the principles involved in drilling a well. Drillstring design manual free download as pdf file. First, types and expected values of loads should be determined. A graphic design and all the critical properties of your bha. Formulas calculations for drilling, production workover gateaiotspe. Drill string design limitations tonmile tm calculations cementing calculations weighted cement calculations calculations for the number of sacks of cement required calculations for the number of feet to be cemented setting a balanced cement plug differential hydrostatic pressure between cement in the annulus and mud inside the casing.
In casing design the upper most joint of the casing string is considered the weakest point in tension, as it has carried the total weight of casing strings. This is a lessonbylesson distributed learning course. Presented in easytouse, stepbystep order, formulas and calculations is a quick reference for daytoday work out on the rig. Typical drill string design based on margin of overpull design parameters. Use features like bookmarks, note taking and highlighting while reading formulas and calculations for drilling.
In many cases, a few minutes of drill string design work could prevent most of the. Lecture 07a 1 calculation of neutral point when the. Formulas and calculations for drilling, production and workover kindle edition by lapeyrouse, norton j download it once and read it on your kindle device, pc, phones or tablets. From the analysis of the designs, a proper bha design will be proposed for each of the hole sections while kicking off, holding angle, dropping the angle. This section of the drilling manual discusses drill string care and use and gives examples of the types of problems usually encountered when the drill string is improperly used or used beyond its physical capabilities. Total annulus volume, drill string capacity, and drill string displacement are. As a result of the limitation with the current operational practices, calculation methods are. Used to transmit rotation and weight to bit via drill pipe and drill collars. Aug 24, 2018 over 500 spreadsheets for mechanical and civil engineeringfree download 24 august 2018 off by the engineering community here a big list of spreadsheets available for download from piping, process, instrumentation, mechanical, drilling and civil.
Tensile loads when pulling the pipe out of the hole. Interested in learning more about drill string components. Use safety factor 2 for your design calculations wherever it is applicable. Basic design calculations based on depth to be drilled. The noticeable exception is the drilling of vertical wells. Mud pump calculation using equation gpm x spp 1,714 with efficiency 0. Slug calculations accumulator capacity usable volume per bottle bulk density of cuttings using mud balance drill string design limitations tonmile tm calculations cementing calculations weighted cement calculations calculations for the number of sacks of cement required calculations for the number of feet to be cemented. This drawing shows that the forces acting on a short slightly curved element of the drill string. In general, it is easier to drill a hole in soft formations than in hard formations. The design parameters and a stepbystep procedure of designing a string are given in api rp 7g, 16th ed, section 7. In the graphic design sheet click on a cell in the string column and select the drill pipe heavey weight drill collars or the tools you have listed. The outer diameter of the tool joint is larger than the body of the drill pipe to accommodate the threads.
Request pdf basics of drill string design introduction drill string components drilling bit drill string design bit design drilling bit selection. Pdf formulas and calculations for drilling production and. Formulas and calculations for drilling, production, and. Drill pipe pressure control equipment drill string loads monitoring equipment bottomhole assembly bha design purpose components assemblies. Volumetric calculations for water or flushing chemicals ahead and behind the cement plug.
These include volumes and strokes, slug calculations, accumulator capacityuseable volume per bottle, bulk density of cuttings using mud balance, drill string design limitations, cementing calculations, weighted cement calculations, calculations for the number of sacks of cement required, calculations. Bhaweb video jar triggering load bha properties wall force torsional dampening torque. Drilling software download free trials and try before you buy. There are a lot of the books available on the subject of the petroleum engineering and there are a lot of the very good and helpful books as. The pipe must be strong enough to handle the service loads during all phases of the drilling program. Drill string design, drill string design book, drill string design manual, drill string design training product categories select a category drilling engineering 4 drilling fluids 1 iwcf iadc well control 3 offers 2 petroleum engineering 2 petroleum geology 1. Calculation of neutral point when the drillstring is lowered into the borehole, the total length of the drillstring is under tension due to its own weight which is partly counterbalanced by the buoyancy. In addition, there are many other related monographs, including casing strength computation and design hao and gong, 1987, finite element method for drill string mechanical analysis yu, 1998. Formulas and calculations for drilling production and workover 2e. This approximate weight is the number to use in design calculations. A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid via the mud pumps and torque via the kelly drive or top drive to the drill bit.
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