Chapter 3 principles of casing design sciencedirect. Calculate the cross section at the inlet of the spiral casing. Uniaxial and triaxial safety factors are computed and compared for. Casing and liners for drilling and completion 2nd edition. Understand how buckling affects casing design limitations and show an appreciation for mitigating its effects. Appreciate the effects of temperature and wear on casing design. Understand how corrosion can reduce casing lifeperformance, recognize signs of corrosion. Design is based on the maximum mud weight at the casing depth 53. It calculates accurate downhole temperature and pressure profiles, which can be used for pipebody movement and casing and tubing load analysis. Oct 23, 2014 design is based on the weight of the entire casing string. Conduct casing design calculations for different load cases via different methods. To design a reliable casing string, it is necessary to know the actual strength of pipe under different load condi tions.
Developments in petroleum science, 42 casing design theory and practice this book is dedicated to his majesty king fahd bin abdul aziz for his outstanding. Collapse design assume that the casing is empty on the inside, that is, no pressure inside the casing and no buoyancy effect. Well design introduction and api standards of casing. Design factors in order to make a direct graphical comparison between the load line and the pipes rating line, the design factor must be considered. The claims made by participants have not been verified or endorsed by epa. Hence, the design of the conductor pipe is made once the total weight of the successive casing strings is known. Calculate the velocity cu at the radius ro by using the equation. Hetrick slide 7 of 22 surface casing is cemented and tested cement is the primary barrier for vertical migration of fluids into usdws. Chapter 1 fundamental aspects of casing design sciencedirect.
Design factor minimum acceptable safety factor where. Every casing has its own strength with regard to burst, collapse and tension and by comparing this to the calculated load, a design factor is. Fundamentals of casing design petroleum engineering and. Casing design design criteria tensile force tensile forces in casings originate from its weight, and shock loading. Through a combination of lecture and extensive handson examples, the fundamentals of casing design are. Material aspects, connection selection, performance properties, load cases, design factors, and buckling are just a few of the many topics that are covered. Click on document casing design theory and practice.
This advanced casing design training course covers the relevant subjects required to understand the structural mechanics of down hole tubular. Design and analysis of hp steam turbine casing for transient. Different casing sizes are required for different depths, the five general casings used to complete a well are. Casing design is a completely new concept for biaxial casing design. Casing design is linked to well trajectory and azimuth closure. The temperature of the casing will also change the dimensions, and those changes were determined. Casing design and practice for high temperature, high pressure wells, squeezing salt wells, deepwater wells and directional and horizontal wells. Design of casing string calls for knowledge of the operating conditions imposed on the casing as well as the concepts related to pipe properties 2. This course is designed for practicing well engineers and well planners who need to understand the principles of casing design. The development of this ms excel based software is motivated by a need. This course builds a firm foundation in the principles and practices of designing, planning and conducting successful casing and cement jobs. Severe casing failures were later found in the well leading to the decision to abandon it and plug it with gravel and cement.
Casing design theory and practice, volume 42 1st edition. The casing shall be of sufficient quality and condition to withstand the effects of tension. Pipe performance is discussed as well as material selection. This abstract presents information to consider in the design of a safe and effective production. Casing design user manual page 11 on the design factors data form, the following are selected. While designing the drilling fluids programme for exploration wells in. Fundamentals of casing design training course petroskills fcd. Conventional casing design is based on singlestring analysis which ignores annulus fluid heatup loads and composite cemented string effects. Work group design sessions will follow a complete wells casing and tubular design process course summary casing and tubular design session day 1 day 2 day 3 day 4 day 5 08. Analyses may be performed in conjunction with the drill design and production design. Agip division organising department type of activity issuing dept. Fundamentals of casing design petroleum engineering and development studies.
Centrifugal pumps basically consist of a stationary pump casing and an impeller mounted on a rotating shaft. This chapter discusses the principles of casing design. Reliabilitybased casing design for geothermal wells european. Working stress design wsd loads are evaluated throughout the entire length of the casing from the well head to the casing shoe. Casing design is an integral part of a drilling engineers work scope. The casing string design program for windows, casing2, has been developed jointly by lone star steel company and maurer engineering inc. Purchase casing design theory and practice, volume 42 1st edition. Basin, casing design, cementing techniques, advanced drilling technologies. Casing couplings are specified by the types cut on the pipe ends and coupling. By the end of the course, delegates will understand those key drivers behind casing design so that they are able to design a string of casing for their well. Casing design manual bg 2001 casing borehole oil well. Casing head housing is generally installed on the conductor pipe.
Feb 24, 2014 how to use the drillingsoftware casing design program in easy steps. The casing design condition setup data form is shown ref. On completion of this course, successful participants will be able to select casing points, identify tubular requirements and loads, and design and specify the required casing string. As a drilling engineer you are required to calculate the burst and collapse loads that would be used to select an appropriate weight and grade of casing for the surface, intermediate and production strings in this land well. The differential pressure between the annulus and the interior of the production casing will cause the casing dimensions to change from the nominal design. An option to enter custom safety factors is also available make the required selections and select. Casing design example the table below is a data set from a real land well. Contributions to the technology in casing design have come from fundamental research and field tests, which have made casing safe and economical.
Fundamentals of casing design petroleum engineering and development studies rabia, h. Casing couplings are designed to sustain high tensile load and to provide pressure containment from both net internal and external pressures. This paper presents the design of a 7 production casing and 1034 x 958 protective casing under high burstcollapse conditions. General casing design criteria drilling engineering. Participants are actively engaged in every aspect of the technical activities required to deliver a coste. The presentation discusses casing design factors and casing design loads. Drive pipe or structural pile gulf coast and offshore only 150300 below mudline.
Understand the procedures used in the design of casing strings. On completion of this module, students are expected to be able to. Casing design has followed an evolutionary trend and most improvements have been made due to the advancement of technology. The casing design application developed by well engineers in havilah hydrocarbon resources management hhrm is designed with simplicity to avoid the complicated casing design software in the market and provide an inhouse tool for quick evaluation of casing scheme options. The amount of deformation was calculated to determine the effect. Overthrust belt, are not appropriate for the relatively pure, slowmoving halite found along the. Tubing string design while many aspects ofcasing and tubing string design are subject to company prejerences, basic concepts and specific options are presented here. Wellcat software is an essential tool for companies operating in highpressure, hightemperature hpht deepwater or heavyoil drilling and production environments. The ingate, figure 7 is basically where the casting material enters the actual mold cavity. Run to prevent wash out of unconsolidated surface formation.
Drilling engineering casing design objectives understand primary functions of casing recognize the various types of casing strings used. Casing serves numerous purposes during the drilling and production history of oil and gas wells, these include. Casing design example casing borehole pounds per square. Burst design assume no backup fluid on the outside of the casing. Surface casing drilling engineering netwas group oil. The pump casing provides a pressure boundary for the pump and contains channels to properly direct the suction and discharge flow. Although minimum cost is the most logical and common reason for pipe selection to satisfy the requirements in fig. Jul 14, 2017 a casing catalog like that presented in the appendix is used to select pipe that will satisfy the requirements in fig.
This workshop provides a comprehensive overview of the design process, emphasizing the working stress approach currently used. Casing design casing borehole strength of materials. This book gathers together much available information in the subject area. The load case calculation consists of pressure and resulting axial stress calculations of worstcase scenarios for a well. Drilling engineering casing design linkedin slideshare. Advanced casing design training course in dubai petroknowledge.
Well design introduction and api standards of casing youtube. Hetrick slide 7 of 22 surface casing is cemented and tested cement is the primary barrier for vertical migration of fluids into usdws the first attempt aka primary cement job. The statements made during the workshop do not represent the views or opinions of epa. Another aspect of manufacturing design which relates to the flow of metal through the castings system. Feb 14, 2018 introduction and api standards of casing choosing the correct size, type, and amount of casing that is used in well construction is of utmost importance to the success of the well. Another reason is that the public have to deal with a corrupted judicial system. It is a crucial element, and all other factors of the castings mold design are dependent on it. The fivedays course is designed to concentrate on the. Identify the factors that determine the minimum setting depth of casing and appraise the top down and bottomup casing setting selection and discuss the functional and loading requirements of various casing strings, in order to make a complete design selection for a wide range of different well. Reliability, casing design, risk analysis, well integrity, three dimensional well tubular design. There is always a need of some assumptions to model any complex geometry.
Th e paper offers a numerical solut ion to the centralization of. Module delivery the module will be delivered by means of lectures, tutorials, videos, practical work and case studies supplemented by industrial visitsindustry. 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. The program includes a database of over 48 different joints of casing to choose from plus the option to add custom csg specs unlimited custom casing sizes can be added to the database with user defined casing. Design and analysis of hp steam turbine casing for. The aim of this casing design course is to develop the course participants understanding of casing requirements, functions, and design principles. The harness casing design and cementing course is a four day intensive course designed by harness petroleum engineers following an extensive and rigorous industry consultation program. Drilling well design integrates all major operations of well design technologies from prespud to td. Perform cement slurry and displacement volume calculations complete drill string and bha designs and failure prevention assessment for each hole.
Participants should have at least one year of drillingrelated experience and be in a role that requires that they perform a detailed casing design. Df design factor the minimum acceptable safety factor sf absolute safety factor. A description of the various types of casing connections is given. Casing and liners for drilling and completions, 2nd edition provides the engineer and well designer with uptodate information on critical properties, mechanics, design basics and newest applications for todays type of well. Choose a velocity at the upstream section of the spiral casing, c 3. Through a combination of lecture and extensive handson examples, the fundamentals of casing design are imparted to the attendees. Design and analysis of hp steam turbine casing for transient state condition 1j. Groover, fundamentals of modern manufacturing 2e two categories of casting process 1. Casing design and cementing training harness energy.