16D BOP Accumulator Sizing and Performance
Contents
1. sse enne 6 3 4 Setting Default Units of Measure sisse sisse entente tnn rennen snas entente snas 6 A A sez IDEO LL I 1 MI DEMOS 6 SR S MEE PCM AERE aaa 6 Equipment Elbraries 5 onere rr necne A E 6 4 1 Equipment Library WindOW iced ouo devils ovde usu tne evade uv una e Ev Ene cna epo 7 41 1 A dete vet tt d reb RE P ck Er RR E aree a ea Pa Re nnn 7 4 172 JEguipmoernt other ended Re benbhce dabas 7 41 3 History ies Deseo E ET A E beate 7 4 2 Importing ete t p ER PR E p FRE ER e RR pru DES 7 424 Importinto a LIDrary uno dete beet A eem badipeen 7 4 2 2 Import into a Project Equipment LISTo deessa nara A EREE RAA nennen EEE RER 7 4 3 Editor Input by Hand sien e et t t A ia 8 4 4 Copy trom Another Library ai e eb t d te Doe teat 8 4 431 Copy ANG Pasta eed lada Beca deret eed 8 44 2 Drag and Drops uoi rte epe betonte eerte Beine ee etit e e pei iter de tr s 9 PRO JC CUS Ann A Ea Ana EA ORR E A N a E AAR A A A 9 5 1 ProJect Datas stib E ta hada sane bees ei Petr a aa 9 5l Project Tab oet ded etico di e ien Gert oi a recede onte E d tee 9 512 Surface and Subsea Tabs inet ce E reap nd dasa nd a di An ada ne agna 10 Sta BOP Stack cip EE 10 5 4 4 Options Tab Ati e edt dna EA d i en tbi teas 11 51 5 IIMEIMAM KITE 11 5 1 6 Notes Tab ce sii eet tn tit betta Ianua Iris pu Irae t Pete ame decay 11 TABLE OF CONTENTS Manual Version Date 23 Jan 2014 Pagei Baler P2. open or save as operation It also remembers the most recently opened or edited Manual Version Date 23 Jan 2014 Page 17 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc library and uses it as the default selection next time a library is called for Finally it stores the name of the custom printing program The INI file is only a convenience for the user The program does not depend on it Deletion of this file will not interfere with the proper functioning of the program It will be recreated each time the program terminates Manual Version Date 23 Jan 2014 Page 18
3. Save Press the F9 key or click the Summary Notes or Performance tabs to calculate the results Create a New Project Starting with Another Project Copy the Whole Project Open the project that you are using as the starting point Menu File Open Project Save it with another file name This will save all of the original project data and its project equipment list in a new file without changing the one you started with Notice that the file name in the title bar will change to the new file name Menu File Save As Change the data that needs to be changed in the new project Save the project Menu File Save Only Use Another Project s Equipment List Open the donor project the one that will supply the equipment Menu File Open Project Open the equipment list for the donor project Menu Equipment Edit Project Equipment Create a new project Menu File New Project Click the title bar of the new project so that it is highlighted Open the equipment list for the new as yet unnamed project Menu Equipment Edit Project Equipment Use Copy Paste or Drag Drop to move equipment items from the donor project equipment list to the new project equipment list see Copy from Another Library below Close the donor project equipment list window Close the new project equipment list window Close the donor project window Fill in data on the Project Surface and or Subsea and Options tabs Save the new project afte
4. If you want to have the data printed in a different way you have two options manipulate an output file or start with the raw project data The Program will send output to a printer but it also has other destinations including file output to HTML RTF rich text format and plain text files These can be modified in a word processor Fora more automated approach that can be applied to multiple output cases It is possible although tedious to write software that will automatically modify these output files taking out items that you do not want and adding in items like letterhead or logos that you do want Alternatively a custom PC application can be written to prepare fully customized output from the project file itself that contains all of the information needed The project file can even be used to input data to custom software doing other types of calculations Information that will help in such a program development is in the Data File Structure section below 8 2 Custom Print Main Menu Command On the main menu of a project window the selection Custom Print appears It is normally greyed out and without function If you write a customized print program this menu item allows you to start that program directly from the sizing program Manual Version Date 23 Jan 2014 Page 14 16D BOP Accumulator Sizing and Performance Tool Interfink Systems nc 8 2 1 Enabling the Custom Print Menu Item The Custom Print menu item is
5. bottom These parts are described in the following sections The Equipment window has several command buttons that may appear depending on the context The Help button is always there Clicking this button brings up a dialog with brief reminders of how to use the library 4 1 1 Comments The Comments tab allows you to describe the library in any way you wish Things like where the data came from who compiled it how when special considerations or warnings etc should all be in this comments section 4 1 2 Equipment The Equipment tab shows the pieces of equipment contained in the library Click on a piece of equipment and its data will appear in the field to the right To change any of that data double click the piece of equipment Note See the Edit or Input by Hand section for the effect of changing descriptive data 4 1 3 History Each time you save a library file you will be asked for a new version number and date and a description of what was changed This information is stored with the library and the descriptions along with the version numbers appear in the list under the History tab Over time the History tab will build up a listing of all changes made to the library so that you can associate a version number with a specific set of changes 4 2 Importing To combine equipment libraries there is a provision for copying the entire contents of a library into another library or a project equipment list This is refe
6. enabled using the Options main menu item Menu Options Custom Print This brings up a dialog box allowing you to select the custom printing program To enable the Custom Print menu item you must check the box select the executable file using the open dialog box that appears and then press the Accept button To change the name of a program that is already there uncheck the box and then check it again by clicking it twice The Program uses the string value as the pFile parameter of a call to the Windows 32 API function ShellExecute 8 2 2 What Custom Print Does When you click Custom Print the sizing program runs a calculation just as if you had pressed the F9 key It then saves the project Then it makes a call to the Windows 32 API function ShellExecute to start your custom print program One parameter is passed to your program via lpParameters in ShellExecute It is the complete path and file name of the project file Example c projects API 16D Example 1 16D 9 DATAFILE STRUCTURE 9 1 General Comments Project files when saved after a calculation by program version 0 45 and later contain all the data necessary to do a custom printout of the data in any form you desire Project file names have the form 16D and have the structure of a Windows INI file They are easy to read Note that since it is an INI file you cannot depend on the order of the lines in the file However there is enough information to tell how to read t
7. in the total of available fluid e Total This is the sum of the Surface and Subsea Adjusted columns This is the total delivered volume counting both surface and subsea accumulators that API 16D allows you to count as available fluid This must be greater than or equal to the volume that is actually required by the equipment FVR e FVR This is the amount of liquid required to complete this step in the stack sequence This includes the total amount of fluid needed for this stack equipment item and all of those that precede it in the sequence e OK This will be Yes or No depending on whether the accumulator supplies enough fluid to complete this step 5 1 8 Calculator Tab See the Gas Law Calculator section 5 2 Project Equipment List The Project Equipment list is not shown in the project window It is accessed via the main menu by clicking the project window and then choosing Menu Equipment Edit Project Equipment The Project Equipment list appears in another window similar to an equipment library window You must enter project equipment before you can define the BOP stack The step by step instruction section above shows examples of how to enter project equipment items 6 GAS LAW CALCULATOR The gas law calculator allows you to do basic gas law calculations on a mass of gas There is no concept of a bottle in the calculator You simply have a volume of gas that you can compress or expand in various ways 6 1 Gas Starting Co
8. named stack equipment item see Bottle Press for more detail e Temp This is the average temperature in the accumulator at the end of this step when the accumulator has been discharged to Bottle Pres e Bottle Pres These two columns indicate the absolute and gauge pressure in the accumulator at the end of this step Note that in the case of Condition 2 this pressure is normally the MOP for the equipment item The strategy of the program is to drain the accumulator to the MOP or until empty and then see if enough fluid was supplied The only place that cumulative required volume is listed is in the Liquid Volumes table FVR column The psig column shows surface equivalent pressure relative to the control fluid head for a subsea accumulator and relative to 1 atm for surface accumulator e Gas Vol The volume of gas present in the accumulator total of all bottles after being discharged to Bottle Pres e Liq Vol The amount of liquid actually remaining in the accumulator total of all bottles after being discharged to Bottle Pres e Gas Dens The density of the gas when the accumulator is discharged to Bottle Pres and is at the listed Temp 5 1 7 2 Liquid Volumes All numbers in the table have the unit listed after the Liquid Volumes heading Clicking the help button near the upper right corner of the Liquid Volumes Table brings up a window containing a summary of the following information e Condition 1 This row contains the
9. project file press F9 to cause it to do the calculations and then save the project You may then run your print routine read the project file and print it as you like Manual Version Date 23 Jan 2014 Page 15 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 9 3 Storage of Memo Fields The Project and Notes tabs both contain memo fields In the project file each memo field is written in a section by itself with each key holding one line of the memo field The section name is a tab name followed by underscore _ followed by the name of the memo field Example Notes memoTechnical Warnings When reading a memo the first key to read is LineCount You must then read LineCount lines using key names of the form LineN where Nis in the range 0 LineCount 1 Each line has two features you must note First of all you must change each instance of slash space to space The convention is that any other white space multiple spaces without slashes can be collapsed to a single space Also if a line begins with a then it is the beginning of a paragraph Lines that do not begin with are logically continuations of the line above and may be concatenated to the end of the previous line and word wrapped 9 4 Project Equipment List The first step in reading the project equipment list is to read the Eqpt List section The Qty key tells you how many pieces of equipment to read The Marker key holds a revi
10. single mouse click The buttons to do this are found in the lower left corner of the Project tab of an open project window When you press one of the buttons a warning message is displayed giving you the chance to change your mind Using this feature will affect every numeric field Afterward you will still probably need to set the units of some fields since it may not pick the unit you actually want Also manually setting the units of specific fields is the only way to use mixed units 3 4 2 Mixed Units If you have a specific set of mixed units that you like to use make a project containing typical but junk data with the units of measure and display format that you prefer Then to make a new project use the dummy project as detailed in Create a new project starting with another project above 4 EQUIPMENT LIBRARIES Equipment libraries are stored in files with names in the form 16DLIB Each file contains one or more pieces of equipment valve ram etc that can be used in a BOP stack You may make your own libraries or you may use libraries created by equipment manufacturers ask them or others An example generic library is provided with the program Manual Version Date 23 Jan 2014 Page 6 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 4 1 Equipment Library Window The Equipment Library window consists of tabbed pages on the left display only fields on the right and command buttons at the
11. 16D BOP Accumulator Sizing and Performance Tool Program Version 1 12 User Manual Companion Tool for API Specification 16D Second Edition July 2004 Up Interfink Systems Inc Manual Revision History Rev Date Description 10 23 Jan 2015 Changed description of the pressure columns in the Performance Table with respect to MOP condition 2 09 10 Dec 2013 Improved the wording of override of wellbore pressure explanation Added the beginnings of a section on technical topics 08 17 May 2011 Expanded explanations in the Performance Table 07 1 Jan 2010 Revised manual to accompany program version 1 04 06 30 Nov 2004 Original Manual published by API All rights reserved No part of this work may be reproduced stored in a retrieval system or transmitted by any means electronic mechanical photocopying recording or otherwise without prior written permission from the publisher Contact the publisher Interlink Systems Inc 5116 Bissonnet 341 Bellaire TX 77401 Note API is a registered trademark of the American Petroleum Institute Its use in this manual serves only to identify the 16D specification published by API and to refer to BOP stacks and their conformance to that specification and does not imply any warranty or endorsement by API of this software Copyright 2004 American Petroleum Institute Published and supported by Interlink Systems Inc under license www mcadams
12. Calculation Methods per Specification 16D A Ideal Gas Isothermal B Real Gas Isothermal and C Real Gas Adiabatic 5 1 3 BOP Stack Tab 5 1 3 1 Override Wellbore Pressure The Wellbore Pressure for all design cases will be based on the rated working pressure of the rams unless the user overrides it with another entry There is no API guidance on what the optional override pressure entry can be but the intent is for a user to be able to impose a lower Wellbore Pressure for a specific application In accordance with the definition in 16D section 3 16 the Wellbore Pressure used in the calculations is the lowest of Lowest rated ram BOP pressure Lowest rated BOP pressure if there are no rams Operator entered wellbore override pressure For all cases API Stack and Other the Wellbore Pressure value is used with the ram Closing Ratio to determine Minimum Operating Pressure MOP of rams 5 1 3 2 User Specified Minimum Operating Pressure Entering a pressure greater than 0 here will specify a lower limit on the MOP that the program uses even if the equipment does not require that much pressure The MOP used by the program will always be the greater of the highest equipment MOP requirement or the user specified value 5 1 3 3 Stack Components The section Entering or Changing the BOP Stack components above has details on how to enter the stack components 5 1 3 4 Minimum Operating Pressure for Shear Rams Shear rams present a
13. aced e Press Ctrl V to paste Manual Version Date 23 Jan 2014 Page 8 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc e Repeat as necessary 4 4 2 Drag and Drop e Open the destination project Menu File Open Project or open a destination library for editing Menu Equipment Edit Library e Inthe case of a destination project open its Equipment list Menu Equipment Edit Project Equipment and click on the Equipment tab so that the Equipment list is visible e Open the source library Menu Equipment Open and click on its Equipment tab so that the Equipment list is visible e Position the two Equipment list windows so that both are visible at the same time e Click on the desired piece of equipment in the source list and hold the left mouse button down e Move the cursor over the destination list The cursor will change from a circle with a bar to an arrow with a square Release the mouse button to drop a copy of the equipment in the destination e Repeat as necessary 5 PROJECTS 5 1 Project Data Project data includes all data except the list of equipment This section contains comments on some of the data fields 5 1 1 Project Tab 5 1 1 1 Project Has Subsea Equipment Check this box if the stack is subsea This box controls the visibility of the Subsea and Fluids Depths tabs 5 1 1 2 Type of System Full API stack means a stack subject to the volumetric capacity requireme
14. ack component with a particular piece of equipment in the project equipment list 9 7 Performance The Performance tab holds two grid controls Each grid is written in its own section where the section name is in the form Performance nameofgria Manual Version Date 23 Jan 2014 Page 16 16D BOP Accumulator Sizing and Performance Tool Interfink Systems nc A RowCount key that tells you how many rows to read Each row is associated with a key of the form RowN where Nis in the range 1 to RowCount A ColCount key that tells you how many columns there are in each row The columns are separated by commas Note that some cells may be blank but there are always ColCount 1 commas in the row and a comma never appears in the text for a cell allowing you to blindly use the commas to separate the columns 9 8 Other Sections Other sections in the file do not hold project data Some deserve comments or will get them anyway so that you know what they are 9 8 1 File Integrity Check Sum This is a quantity computed from the data in the file It is not a simple check sum but is more akin to a cyclic redundancy check It is an extremely robust way to detect any changes to a file It is included to catch corruptions or manual changes to project or library files Never write to a project or library file Otherwise the program will warn you of the mismatch However the program will read the file as best it can So if you make changes in a proper
15. actual volume of fluid in the accumulators when fully charged e Fp F These are the pressure and volume design factors as defined in API 16D Actual fluid volumes delivered by the bottles are divided by these factors to get the permissible design volume e Condition 2 MOP This row contains the actual fluid volume remaining in the accumulators when discharged to the MOP Also listed on this line is the pressure limited design factor Fp to be applied to the actual volume e dV1to2 This row is associated with the row immediately above it and gives the volume of fluid delivered by the accumulators when discharging from fully charged condition 1 to the MOP condition 2 This is called the pressure limited volume e Condition 3 This row contains the actual volume of fluid left in the accumulators when discharged This is usually 0 0 but does not have to be The accumulator is discharged when its pressure reaches the hydrostatic pressure of the sea even if there is fluid left in the accumulator Also listed on this line is the volume limited design factor Fv to be applied to the actual volumes Prior to Revision 1 12 some cases would blindly calculate the pressure limited volume even if that drained the accumulator past empty This would result in Gas Vol total accumulator volume Liq Vol negative and dV1 to 2 too large This was corrected in Version 1 12 Manual Version Date 23 Jan 2014 Page 12 16D BOP Accumulator Sizing an
16. aic calculators It also knows the symbol pi For example assume you are entering the volume of a cylinder 10 long and 3 in diameter Instead of entering 70 69 cu in you can enter 0 25 pi 3 2 10 cu in When you press Enter or move the cursor to another field the expression is evaluated Manual Version Date 23 Jan 2014 Page 2 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 3 GETTING STARTED 3 1 Parts of a Project In general a project consists of two parts input data describing the stack and the environment anda project equipment list which contains descriptions of the various pieces of equipment making up the stack valves rams connectors etc Projects are stored in files with names of the form 16D Example project files are provided with the program representing the examples in the Appendix Accumulator Volumetric Design Examples of API Specification 16D Any project must have an equipment list containing at least one piece of equipment Equipment can be entered from scratch or can be imported from an equipment library For equipment that will appear in more than one project it is best to initially enter the equipment in a library and then import it to the project as needed See Equipment Libraries below for more information 3 2 API Design Examples and Errata Along with the installation of the Program data files are provided with this program corresponding to the 9 exam
17. ce sii tp aid abia 16 9 8 Other Sections aee eint ra pd a eee eie de Pee e edere er erudi ihe teat e RR 17 9 8 1 File Integrity Check Sum ssssssssssssssssseeeeeneee ennt nnnt enin nnns sn tns entente resin nr nr enne 17 9 8 2 Library Version eie ipee IE IEEE ed eet ee a eee HR d Ri 17 9 8 3 API 16D Proje ct File iiie teret tte Poe et tga ite praeter Wot ves Sea DTE tp ite Oe eR Re 17 98 4 Padel ii temo Ee PE eo PERDE re epp Ra Ern Tes puse OR Ew deua o Or Ene ees 17 10 Frogram Bj oe cc oso EIDEM 17 Manual Version Date 23 Jan 2014 Page ii 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 1 DESCRIPTION OF PROGRAM AND MANUAL The16D BOP Accumulator Sizing and Performance Tool Program Program in this manual is designed to accompany API Specification 16D Second Edition and make it easier to handle the accumulator sizing calculations described in the specification It is not a substitute for the full Specification Program users should already have access to and be familiar with Specification 16D Second Edition The Program is designed to run under 32 bit and 64 bit Windows operating systems including Windows 2000 XP Vista and 7 It should work properly under earlier operating systems back to Windows 95 but that is not guaranteed Other requirements memory hard disk etc are very modest compared to most Windows applications 2 USER INTERFACE This section describes features important to ope
18. d Performance Tool Interfink Systems Inc e dV 1 to 3 This row is associated with the row immediately above it and gives the volume of fluid delivered by the accumulators when completely discharged condition 1 to 3 See Surface and Subsea Actual and Surface and Subsea Adjusted below for more details e Functional Step This column indicates the state of the accumulator Each equipment item in the sequence gets two lines The content of the two lines is given under the appropriate column heading e Surface and Subsea Actual For Condition 1 these columns show the amount of fluid left in the accumulator at the end of the step and occupy a single line However each equipment item in the stack sequence and also the discharged condition Condition 3 have two lines associated with them The first line is the amount of fluid left in the accumulator at the end of the step see Condition 2 and 3 above The second line always begins with dV 1 to and it always shows the change in fluid volume between Condition 1 and Condition 2 see dV 1 to 2 and 3 above Remember that Condition 2 is when the accumulator has been discharged all the way to the MOP for the equipment item e Surface and Subsea Adjusted These two columns indicate the Surface and Subsea Actual delivered volume dV the volume change from condition 1 to condition 2 or 3 after being divided by the volume factors F or F This is the delivered volume that API 16D allows you to count
19. edit the Acme 5 valve and change the volume to 1 3 gal It is still an Acme 5 valve since you made no changes to the Description and only updated the volume 4 4 Copy from Another Library Individual items of equipment can be moved easily back and forth between equipment libraries and project equipment lists These instructions are written for copying equipment from a library to a project equipment list but they will work just fine when used to copy between two libraries two project equipment lists or from a project equipment list to a library 4 4 1 Copy and Paste Copy and paste is most useful when your screen is crowded and it is not easy to see both the source library and destination equipment list at the same time e Open the destination project Menu File Open Project or open a destination library for editing Menu Equipment Edit Library e Inthe case of a destination project open its Equipment list Menu Equipment Edit Project Equipment Open the source library Menu Equipment Open Click on the source Equipment list so that its title bar is highlighted Click on the Equipment tab Click on the desired piece of equipment so that it is highlighted Press Ctrl C to copy Click on the destination Equipment list so that its title bar is highlighted Click on the Equipment tab Click in the white equipment list area underneath the Equipment tab It is OK if an existing piece of equipment is highlighted It will not be repl
20. engineering com 1 2 Description of Program and Manual cssccccesseeceeeeeeeeeeeeeeeeeeeseeeeeenseee seen seeeseeeseeeeenseaeeeenseaeeeenseeeeeeeaseeeeeens 1 User Interface 5 niil leto ul EL D ilL d erre De reir 1 2 1 General LAVOUE ipn DIR e nono ip 1 2 2 Standard Windows Features siiis esee esee nnne ntn sen nn nn nn th nsns en nnns seen ntn asses rn asse na 1 22 Tooltips Hints i e ido eed RT n er eR t tette eee oh aee tiers 1 2 2 2 Click Double Click and Right CliCKk ooooococnnnccconinoccconononccononononnnonnnnnnnnnnnnnnnnnnnn nn enne nnn nennen 1 2 3 Numeric Entry El totes e oet eoe 1 2 3 Units ob Measure seed rette feta ee bem t Bee re bem t et fer 2 2 3 2 Mouse and Keyboard Interactions ssssssssssesessee nennen cnn 2 23 33 Calculator FU rnctiOrns eor ren di bn leu a d ee nen Bn d on n nee RR a cede Pda 2 Getting Started AR 3 3 1 Parts of a Projets ui e d pt de t n OR ce e t RE RENE ed 3 3 2 AFI Desin Examples an Errata ui i te re adeb em e e 3 3 3 Quick Step by Step Instructions to Create a New Project sse 4 3 3 1 Create a New Project Using an Equipment Library seen nennen 4 3 3 2 Create a New Project Starting with Another Project sessssssssseeeeeeeneen nnns 5 3 3 3 Create a New Project Entering Equipment by Hand sese 5 3 3 4 Entering or Changing the BOP Stack Components
21. erformance Tb oe aee a eset exe dee Ti 11 51 87 Galculator TDi ALA A a a ba 13 5 2 Project EquipmentEst o 13 6 Gas LaWw Calculator feck aneta eae eee e 13 6 1 Gas Starting Conditions iii End Ah ante dent ME duda tddi abd ees 13 6 2 Desired End Condition essei rr 14 6 3 Ending Gas Conditions d dad ee ia daa Da aSa ER 14 6 4 Volume Change SUMA Vocal alee Mae eae Gi bb abes 14 7 TECONICAL TOPICS E ree ll i eeree cf 14 7 1 Minimum Operating Pressure MOP esses esee eene tn nennen sinn sienten ernst sn tnter nnn 14 8 CUSTOM Pri iia 14 8 1 Custom Print Formals o eb o Pb ut e bate t d e Ptr 14 8 2 Custom Print Main Menu Command isses sienne einen e a renean sitate etre aai 14 8 2 1 Enabling the Custom Print Menu ltem sssssssssseseeseneneneneen enne ennt nnne nnns 15 8 2 2 What GCustom Print DOG6S c ora ee once eee na ec ea te Lg det ara ce e Ta ua aee eate Dex ae it 15 9 P iCudI Eutr i Ekini 15 9 1 General Comments ot pe ete Po t EO ettet A ne dp tion o odes 15 9 2 HOW 10 USC E 15 9 3 Storage Of Memo FieldS oooococnoconicicinncnno cocer naciera 16 9 4 Project Ed pmen LISTo s anrod d er te c i ee e Ba c d oa ee Pe Ead 16 9 5 Project Tab tb e deb rede p eb aee tt deae 16 9 6 BOP Stack Seguence i ie Pai ede ca Are da fous S agus Rae To ute eve ea ege Rau EROR 16 9 7 Performan
22. eric Entry Fields The numeric entry fields are not a standard Windows control Though they resemble a standard text box they include several useful features specifically for entering engineering quantities 1 Note This program is published and supported by Interlink Systems Inc under a license agreement with API API no longer warrants or supports this software Address all questions or comments to Interlink Systems Inc Manual Version Date 23 Jan 2014 Page 1 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 2 3 1 Units of Measure The most obvious difference between the numeric field and the text box is that the field has two separate parts a number and a unit of measure As a result each input quantity can have its unit of measure specified independently from all of the rest allowing any desired mix of English and metric values 2 3 2 Mouse and Keyboard Interactions 2 3 2 1 Completely Manual Entry You may highlight and type over the characters in a numeric field just like you would in any Windows text box The control will check your entry for proper form and unit of measure and display an error dialog if a mistake is found 2 3 2 2 Editing the Number Move the cursor over the number and double click The highlighting will allow you to simply retype the number without changing the unit of measure The use of a period or comma for the decimal point is controlled by the regional settings in Windows Yo
23. he file Note A suggested approach to obtaining data from a project file is using the WinAPI GetPrivateProfileString and then processing the returned string to the desired floating point value including units To follow the description below open a project press F9 to calculate and save the project Then refer to the project looking at it or printing it with notepad so that you can see the sections keys and data Otherwise the text below will be difficult to read Each of the tabs in the project window has a section in the file e g Surface and the section name can be depended upon not to change from project to project or to only change in a predictable way Key names always bear a strong resemblance to the prompt for the data field so it should normally not be a problem telling what data fields go with what keys in the file The project equipment list is also found in the file Its structure is a bit involved so there is a description below Finally the file may contain information you do not need For instance the file will always have a Subsea section However the project itself may not have a subsea stack and so the Subsea section is irrelevant Similarly there may be equipment listed that is not used in the stack and that may no longer even be part of the current equipment list 9 2 How to Use If you make a custom print routine you must handle all formatting page handling etc The proper procedure is to open a
24. indow e Save the project Menu File Save 4 3 Edit or Input by Hand To create your own library from scratch select Equipment from the main menu and then New Library A blank Equipment Library window will appear in which you can enter equipment as you wish or import another library as described above Be sure to use the Save and Save As buttons on the window periodically and when you have finished entering data You may edit the equipment data in any library Simply select Equipment from the main menu and then Edit Library A dialog box allowing you to select the desired file will appear Once you select the file it will be opened and the contents displayed in an Equipment Library window Double click a piece of equipment to change its parameters Important Note If you edit a piece of equipment and change any item in the description section you are creating a new piece of equipment not editing an existing one After changing all or part of the description a piece of equipment containing the new description appears in the Equipment list This is not the case with the items in the technical data section which are treated as changes to the same piece of equipment Example You begin with an Acme 5 valve with a 1 gallon actuator Suppose you edit the valve and change Acme to Pinnacle Pinnacle and Acme are not the same you have created a new valve called a Pinnacle 5 valve with a volume of 1 gal Suppose instead that you
25. lements to the stack in the order that they will be operated order is not important for API stacks only for rapid charge or discharge Save the project Menu File Save Press the F9 key or click the Summary Notes or Performance tabs to calculate the results Import Only Selected Equipment Items from a Library into the Project Open an equipment library file that will supply the equipment data Menu Equipment Open Library Create a new project Menu File New Project Click the title bar of the new project so that it is highlighted Open the equipment list for the new as yet unnamed project Menu Equipment Edit Project Equipment Use Copy Paste or Drag Drop to move equipment items from the library equipment list to the project equipment list see Copy from Another Library below Close the Library window Close the Project Equipment list window Fill in data on the Project Surface and or Subsea and Options tabs Save the project after fining in each tabbed page Menu File Save Note See the sections entitled EQUIPMENT LIBRARIES and Edit or Input by Hand Manual Version Date 23 Jan 2014 Page 4 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 3 3 2 3 3 2 1 3 3 2 2 Click the BOP Stack tab and add elements to the stack in the order that they will be operated order is not important for API stacks only for rapid charge or discharge Save the project Menu File
26. ndition 0 Precharged accumulators Condition 1 Charged Condition 2 MOP Casing Shear Ram BOP Condition 2 MOP Blind Shear Ram BOP Condition 2 MOP LMRP Connector Condition 3 Fully discharged 3 3 Quick Step by Step Instructions to Create a New Project To create a new project you must fill in several data fields and have at least one piece of equipment listed as part of the BOP Stack In order to build the stack at least one piece of equipment must be listed in the project equipment list to select from The following sections briefly outline how to create a project get equipment into it and fill out a BOP Stack 3 3 1 3 3 1 3 3 1 2 Create a New Project Using an Equipment Library Import All Equipment Items from a Library into the Project Create a new project Menu File New Project Click the title bar of the new project so that it is highlighted Open the equipment list for the new as yet unnamed project Menu Equipment Edit Project Equipment Import equipment from a library Menu Equipment Import Eqpt from Library When you choose the library you want to import from it will be opened all equipment copied to the project and then closed leaving the project and project equipment list open Close the Project Equipment list window Fill in data on the Project Surface and or Subsea and Options tabs Save the project after filling in each tabbed page Menu File Save Click the BOP Stack tab and add e
27. nditions Begin by entering starting conditions The type of gas which can be ideal and the calculation method will put limits on other choices you can make Manual Version Date 23 Jan 2014 Page 13 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 6 2 Desired End Condition Check the quantity you want to specify as the end condition and enter its value 6 3 Ending Gas Conditions This section holds the calculated condition of the gas at the end of the change Press the Calculate button to fill in the fields If you want to use these ending conditions as the starting conditions of another change then press the Copy To Start button 6 4 Volume Change Summary This section translates a gas volume change into a fluid volume change The two fields list the change that occurred in the last calculation and also a running total of all changes since the last reset 7 TECHNICAL TOPICS 7 1 Minimum Operating Pressure MOP MOP is defined and handled differently for Full API stacks as opposed to other design systems You can find information on this in sections 5 1 3 1 5 1 3 2 and 5 1 3 4 There is a field to allow you to set an MOP independently of the equipment it is found on the BOP Stack tab 8 CUSTOM PRINTING There is a limited facility in the API 16D Sizing program for customized printouts This section describes the options available 8 1 Custom Print Formats The Program has a fixed output format
28. nts of section 5 of API 16D It may have accumulators on the surface subsea or both There is no provision for rapid charge cases Other Design means a system in which the user specifies the equipment to be operated The program verifies sufficient fluid volume for each step in the stack sequence It may have accumulators on the surface or subsea but not both Rapid discharge systems also give the option of using rapid charge 5 1 1 3 Convert All Quantities to These buttons allow you to convert all data fields in the whole project to standard English or metric units of measure The section Setting Default Units of Measure above has more information on these buttons 5 1 1 4 Accumulators Are Isolated This box controls the selection of pressure at the start of the discharge If it is checked then the discharge starts at the pump stop pressure Otherwise the discharge starts at the pump start pressure Manual Version Date 23 Jan 2014 Page 9 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 5 1 2 Surface and Subsea Tabs Input data fields for pump start and stop pressures Surface tab accumulator bottle properties including precharge gas nitrogen or helium environmental temperatures and any user determined minimum functional volume requirement for subsea accumulators Select options for calculation method A B or C and for precharge and number of bottles calculated or user input
29. open project This shows the list of components in the stack and some buttons to use for modifying the list Common actions are described below 3 3 4 1 Enter New Stack Components e Click the Add button e Inthe resulting dialog box type in the description of the component like Upper Pipe Ram or Upper Outer Kill Valve e Use the pull down list to select the equipment to be used for this component The equipment must have already been entered into the project equipment list e Press OK to enter the new component into the stack or press Cancel to abandon the new component without putting it into the stack 3 3 4 2 Change One That Is Already There e Double click the stack component you want to change e Enter anew description and or select a different piece of equipment e Press OK to save the new component description or press Cancel to leave the component unchanged 3 3 4 3 Delete a Component from the Stack e Click a stack component to highlight it e Click the Delete button Be careful No confirmation will appear it just goes away 3 3 4 4 Change the Order of the Components e Click a stack component to highlight it Z e Click the up or down arrows Illustrated at the right to move the component up B or down in the stack 3 4 Setting Default Units of Measure 3 4 4 English vs Metric New projects start out with English units for all quantities You may convert all units of measure in a project to English or metric with a
30. ple cases in Annex C of the API 16D spec These are useful in showing you how the program input and results relate to hand spreadsheet calculation The program results may have a small and negligible difference from hand calculation This is due to round off effects and to slight differences between the real gas equation of state model used by the program compared to the NIST gas property tables used for the API 16D examples Some numerical typographical and printing errors exist in Annex C with the corrections as follows Page 67 Fluid Densities and Head Pressures The sea water head pressure should be 3327 psig not 3227 psig Page 81 Example 5 Liquid Volumes table Condition 3 Total should be 398 0 not 557 3 Page 88 Example 7Performance Table Gas and liquid volume columns are incorrect The following list is correct Performance Table Gas Volume gal Liquid Volume gal Precharged accumulators surface Condition 0 Precharged accumulators Condition 1 Charged Condition 2 MOP Casing Shear Ram BOP Condition 2 MOP Blind Shear Ram BOP Condition 2 MOP LMRP Connector Condition 3 Fully discharged continued Manual Version Date 23 Jan 2014 Page 3 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc Page 91 Example 8 Performance Table Gas and liquid volume columns are incorrect The following list is correct Performance Table Gas Volume gal Liquid Volume gal Precharged accumulators surface Co
31. r filling in each tabbed page Menu File Save Click the BOP Stack tab and add elements to the stack in the order that they will be operated order is not important for API stacks only for rapid charge or discharge Save the project Menu File Save Press the F9 key or click the Summary Notes or Performance tabs to calculate the results Create a New Project Entering Equipment by Hand Create a new project Menu File New Project Click the title bar of the new project so that it is highlighted Open the equipment list for the new as yet unnamed project Menu Equipment Edit Project Equipment Use the New Item button on the Project Equipment list window to create new pieces of equipment as necessary Close the Project Equipment list window Save the project Menu File Save Fill in data on the Project Surface and or Subsea and Options tabs Save the new project after filling in each tabbed page Menu File Save Click the BOP Stack tab and add elements to the stack in the order that they will be operated order is not important for API stacks only for rapid charge or discharge Save the project Menu File Save Press the F9 key or click the Summary Notes or Performance Tabs to calculate the results Manual Version Date 23 Jan 2014 Page 5 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc 3 3 4 Entering or Changing the BOP Stack Components Click the BOP Stack tab of an
32. rating the software Even if you are very comfortable with Windows program design it is a good idea to read the section on Numeric Entry Fields as you will be using them a lot and they have several helpful features 2 1 General Layout The Program is a typical Windows Multiple Document Interface MDI application This means that within the main program window several accumulator sizing projects can be opened at the same time in MDI Child windows 2 2 Standard Windows Features The Program is structured mostly with standard Windows controls that should be familiar to most users These include the main menu check boxes radio buttons command buttons text and memo fields and dialog boxes Since these are common features of Windows programs they will not be discussed here 2 2 1 ToolTips Hints Virtually all data entry fields have one line of help text associated with them called a ToolTip To see the ToolTip for a field just move the cursor over the place where you would enter data and wait one second for the ToolTip to appear 2 2 2 Click Double Click and Right Click These standard Windows mouse functions are described here only to define the terms used elsewhere in the manual Click means to press the mouse button once Double click means to press the mouse button twice in rapid succession Click and double click are both done with the left mouse button Right click uses the right mouse button 2 3 Num
33. rred to as importing a library To import an equipment library the library or project equipment list that is to receive the imported equipment must be open and highlighted You then will be able to select Import Eqpt from Library from the Equipment menu 4 2 1 Import into a Library e Open the destination library for editing Menu Equipment Edit Library or Equipment New Library e Import equipment from the library Menu Equipment Import Eqpt from Library When you choose the library you want to import from it will be opened all equipment copied to the destination library and then closed leaving the destination library open for further editing e Edit or import another library as desired and then save the destination library click the Save or Save As button e Close the window 4 2 2 Import into a Project Equipment List e Open a project Menu File Open Project e Click the title bar of the project so that it is highlighted e Open the equipment list for the project Menu Equipment Edit Project Equipment Manual Version Date 23 Jan 2014 Page 7 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc e Import equipment from the library Menu Equipment Import Eqpt from Library When you choose the library you want to import from it will be opened all equipment copied to the project and then closed leaving the project and project equipment list open e Close the Project equipment list w
34. sion number describing the format of the equipment list entries At this point there is only one ELO1 Each equipment item is in a section by itself with the section name Egpt List Item where Nis in the range 1 to Qty Each section contains data for one equipment item All of the key names should be relatively easy to follow except perhaps for EqptTag EqptTag is an identifier for the piece of equipment that is unique within the project It is used in a stack sequence to identify the piece of equipment associated with a particular stack component see BOP Stack Sequence below 9 5 Project Tab The section for the Project tab has the name General 9 6 BOP Stack Sequence The fields at the top of the BOP Stack page are stored in the Stack section formatted like everything else and do not need specific comments However the sequence of stack components needs some explanation The Seq section holds one key named Qty which tells you how many components are in the stack Each of the Qty stack components is in a section of its own named Seq DefaultSeq Item N where N is in the range 1 to Qty The numeric order 1 N is the order in which the components are operated in the case of rapid discharge systems Each stack component section has two keys Desc and EqptTag The Desc key holds the description of the stack component such as Upper Pipe Ram The EqptTag key holds a unique identifier that allows you to cross reference this st
35. special case in that the shearing pressure depends on the tubular to be sheared These operating pressure values like other properties are generally obtained from the ram manufacturer For an Other design Type of System this is handled by creating a separate equipment item for each drill pipe tubular shear data case of the shear ram and entering the required shearing pressure in its Minimum Component Operating Pressure field and entering an appropriate description under the Submodel data field The different descriptions i e in Submodel will force the library editor to create different pieces of ram equipment for each tubular entered An example follows e Enter ashear ram shearing on tubular X e Edit that shear ram changing the description and changing the pressure to that for shearing on tubular Y This creates another shear ram with a different shear pressure e Repeat as many times as you want for tubulars X Y Z T etc Manual Version Date 23 Jan 2014 Page 10 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc e Inthe BOP stack list add a stack component called Shear Ram if it is not already there and select equipment X for it e Run your calculation e Tosee what it would do with tubular Y double click the shear ram and change the equipment field to Y e Run your calculation again For an API Stack Type of System Specification 16D does not require that the shearing press
36. the results if needed 5 1 6 Notes Tab 5 1 6 1 Technical Notes The technical notes are included to give additional information on the internal details of the calculations They can be ignored if you judge them to be acceptable or unimportant for the design case being analyzed 5 1 6 2 Technical Warnings Technical warnings are serious errors that possibly invalidate the results of a calculation because of Specification 16D requirements or technical program issues If there are any technical warnings look at them closely and determine how to resolve the problems 5 1 7 Performance Tab Displays two tables of volumes pressures temperatures and gas densities for each charging and discharge step Lower table shows how discharged fluid volume compares to FVR Functional Volume Manual Version Date 23 Jan 2014 Page 11 16D BOP Accumulator Sizing and Performance Tool Interfink Systems Inc Requirement and whether each FVR is met An explanation of the information in each column is included here 5 1 7 1 Performance Table Clicking the help button near the upper right corner of the Performance Table brings up a window containing a summary of the following information Note Surface and subsea bottles are listed separately in this table not combined e Functional Step This column indicates the state of the accumulator For any line starting with Condx 2 this is the condition of the accumulator associated with operating the
37. u cannot control this from the Program When entering numbers you must conform to the regional settings selected for Windows Thousands separators are optional when inputting a number but if used must be correct Ex 1000 5 or 1 000 5 are OK in the US but 1 00 is not 2 3 2 8 Changing the Unit of Measure Move the cursor over the field and click the right mouse button A menu will appear that contains all valid units of measure for the field Click the unit you want to change to The menu will disappear and the numeric part will be scaled to the new unit of measure You may also double click the unit part which causes it to become highlighted and then type in a new unit However if you do this the new unit must be recognized as a valid unit for this field or you will get an error dialog box Also when you type in a new unit the numeric part will not be scaled 2 3 2 4 Formatting the Number Put the mouse over the field and click the right mouse button A menu will appear At the bottom of the menu are the selections Floating and Fixed Format Click one or the other Floating format displays according to a built in set of rules and may include decimal points and may use engineering notation with exponents 2 3 3 Calculator Functions Any time you can enter a number you can instead enter an arithmetic expression The field recognizes the operators and exponentiation and allows parentheses like most common algebr
38. ure be considered and therefore the Minimum Component Operating Pressure which may contain shear pressures of all ram type of equipment is not considered by the program for such designs However if the user wishes to have the shearing pressure also considered in setting the MOP enter the required shearing pressure in the User specified minimum operating pressure data field on the BOP Stack tab 5 1 4 Options Tab 5 1 4 1 Additional Volumes In the case of API stacks the program will always use at least the minimum volume criteria specified in 16D If you want to include additional volumes place the appropriate check marks in this section In the case of non API stacks you must place check marks in this section for the equipment that you want to operate If you want to open and close a piece of equipment but at different places in the specified sequence it will be necessary to define two different pieces of equipment one with only an opening volume and another with only a closing volume Enter a descriptive phrase i e Open only and Close only in the Submodel description to keep the two equipment pieces separate 5 1 4 2 Units and Formatting for Use with Computed Output Specify units of measure and formatting options for all computed quantities that do not have an on screen field dedicated to them 5 1 5 Summary Tab All the information on this tab is computed Clicking the tab automatically causes a recalculation of
39. way the data will be read correctly by the program after it yells in alarm at you and the check sum will be corrected when the file is saved 9 8 2 Library Version Never used in a project file Ignore it 9 8 3 API 16D Project File This section only contains one key that tells you the revision number of the program that wrote the data file 9 8 4 PageSetup This contains the data that you input under the File Page Setup menu item 10 PROGRAM INI FILE API_16D_Sizing exe makes use of a small INI file to store some basic information about the operation of the program The file is stored in the location specified by the APPDATA environment variable This points to different locations depending on the operating system you are using In Windows Vista and 7 the whole path is usually C Users username AppData Roaming Interlink_Systems_ILS ILS_16D_Tool In Windows 2000 and XP it is usually C Documents and Settings username Application Data Interlink_Systems_ILS ILS_16D_Tool If the APPDATA environment variable is missing as it might be in operating systems earlier than Windows 2000 or the program cannot create the APPDATA folder as described above the INI file is written into the same folder as the executable The information in the INI file holds the location and size of the main parent window It keeps track of the folder that was last used to read or save a project This folder becomes the starting folder for the next project
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