Mi swaco Toga User manual



ManualPartNumber:90‐90‐885(Rev.B)

Installation,OperationandMaintenanceManual

For

TOGA*

TotalGasContainmentSystem



DISCLAIMER



RecommendationsmadebyM‐ISWACOareadvisoryonly.M‐ISWACOshallnotbe

liableunderanyguaranteesorwarranties,expressedorimplied,inanymannerorform,

ANDALLWARRANTIES,EXPRESSEDORIMPLIED,AREHEREBYSPECIFICALLY

EXCLUDED,andM‐ISWACOshallnotbeliableforthefailuretoobtainanyparticular

resultsfromtheuseofanyrecommendationmadebyitorfromtheuseofthismaterial.

InnoeventshallM‐ISWACObeliableforincidentalorconsequentialdamages.

Publicationdate:November2008

Allotherproducts,brand,ortradenamesusedinthispublicationarethetrademarksor

registeredtrademarksoftheirrespectiveowners.

Allrightsreserved.Thispublicationisthepropertyof,andcontainsinformationproprietaryto

M‐ISWACO.Nopartofthispublicationmaybereproducedinanyformorbyanymeans,

includingelectronic,mechanical,orotherwise,withoutthepriorwrittenpermissionof

M‐ISWACO.

Informationcontainedwithinthispublicationissubjecttochangewithoutnotice.



90‐90‐885 (Rev.B)



TOGA*1‐1

Section1INTRODUCTION

1‐1TABLEOFCONTENTS

1‐1.1ListofParagraphs

Sect

ParaTitlePage

1INTRODUCTION

1‐1TABLEOFCONTENTS......................................................................................1‐1

1‐2Contactinformation.............................................................................................1‐4

2MAINDATA

2‐1Functionaldescription.........................................................................................2‐1

3TECHNICALDESCRIPTION

3‐1PrinciplesorTheoryofoperation......................................................................3‐1

4PREPARATION

4‐1Preparationofequipmentforinstallation........................................................4‐1

4‐2Equipmentinstallation........................................................................................4‐2

4‐3DGASSER*Capacity‐vs‐CentrifugalPumpOutput....................................4‐8

5OPERATINGINSTRUCTIONS

5‐1MUD/GASSEPARATOR*operation................................................................5‐1

5‐2DGASSER*operation.........................................................................................5‐3

5‐3StoppingtheDGASSER*....................................................................................5‐4

6MAINTENANCE

6‐1safetysummary

6‐2Sparepartsneededfor2‐yearsoperation.........................................................6‐2

6‐3MAINTENANCEOFMUD/GASSEPARATOR*............................................6‐4

6‐4MAINTENANCEOFDGASSER*.....................................................................6‐6

6‐5Faultfindingandcorrectionofirregularities...................................................6‐7

7SPAREPARTSLIST

7‐1TOGA*(LandandOffshoreversion)

8ATTACHMENTS

8‐1TechnicalBulletin(TB152).................................................................................8‐1



90‐90‐885(Rev.B)



1‐2TOGA*

1‐1.2ListofTables

Sect

TableTitlePage

4PREPARATION

4‐1MotorWiring.......................................................................................................4‐7

4‐2DGASSER*CapacityAndHorsepowerRequired.........................................4‐8

6MAINTENANCE

6‐1RecommendedSparePartsList.........................................................................6‐2

6‐2TroubleshootingTheMUD/GASSEPARATOR*............................................6‐7

6‐3TroubleshootingTheDGASSER*.....................................................................6‐8

7SPAREPARTSLIST

7‐1TOGA*System,LandVersion9620248............................................................7‐3

7‐2TOGA*System,OffshoreVersion9620249......................................................7‐5

7‐3MUD/GASSEPARATOR*,LandVersion9620244.........................................7‐9

7‐4MUD/GASSEPARATOR*,OffshoreVersion9620245...................................7‐13

7‐5MUD/GASSEPARATOR*FloatControlValve9620226...............................7‐17

7‐6BackFlowManifold9620199.............................................................................7‐21

7‐7BackPressureManifold9620384.......................................................................7‐23

7‐8DualVacuumPumpD‐GASSER*9620311‐01and9620311‐02.....................7‐27

7‐9D‐GASSER*TankandSkid9620002.................................................................7‐31

7‐10D‐GASSER*FloatControlValve9620040........................................................7‐33

7‐11D‐GASSER*Float9620045.................................................................................7‐35

7‐12D‐GASSER*DischargePipe9620063................................................................7‐37

7‐13D‐GASSER*SuctionPipe9620312....................................................................7‐39

7‐14D‐GASSER*VacuumPumpandMotor9620167‐01and

9620167‐02(230/460V,60Hzand380V,50Hzversion)...............................7‐41



90‐90‐885 (Rev.B)



TOGA*1‐3

1‐1.3ListofFigures

Sect

FigureTitlePage

4PREPARATION

4‐1ErectingTheMUD/GASSEPARATOR*...........................................................4‐2

4‐2SuggestedLocationsOfDGASSER*.................................................................4‐5

4‐3JetPressuretoFlowRateCurves.......................................................................4‐9

5OPERATINGINSTRUCTIONS

5‐1MUD/GASSEPARATOR*FloatValve.............................................................5‐2

5‐2BackPressureManifold......................................................................................5‐3

7SPAREPARTSLIST

7‐1TOGA*System,LandVersion9620248.............................................................7‐2

7‐2TOGA*System,OffshoreVersion9620249......................................................7‐4

7‐3MUD/GASSEPARATOR*,LandVersion9620244..........................................7‐7

7‐4MUD/GASSEPARATOR*,OffshoreVersion9620245...................................7‐11

7‐5MUD/GASSEPARATOR*FloatControlValve9620226................................7‐16

7‐6BackFlowManifold9620199..............................................................................7‐20

7‐7BackPressureManifold9620384.......................................................................7‐22

7‐8DualVacuumPumpD‐GASSER*9620311‐01and9620311‐02......................7‐25

7‐9D‐GASSER*TankandSkid9620002.................................................................7‐30

7‐10D‐GASSER*FloatControlValve9620040.........................................................7‐32

7‐11D‐GASSER*Float9620045..................................................................................7‐34

7‐12D‐GASSER*DischargePipe9620063................................................................7‐36

7‐13D‐GASSER*SuctionPipe9620312.....................................................................7‐38

7‐14D‐GASSER*VacuumPumpandMotor9620167‐01and

9620167‐02(230/460V,60Hzand380V,50Hzversion)...............................7‐40

7‐15D‐GASSER*VacuumPumpCompressor8913003..........................................7‐44

90‐90‐885(Rev.B)



1‐4TOGA*

1‐2CONTACTINFORMATION

M‐ISWACO

P.O.Box42842

Houston,TX77242‐2842

www.miswaco.com

E‐mail:[email protected]

GlobalSales/TechnicalSupport

Tel:281‐988‐1866

Fax:281‐988‐1889

WATS:1‐800‐654‐0660

90‐90‐885 (Rev.B)



TOGA*2‐1

Section2MAINDATA

2‐1FUNCTIONALDESCRIPTION

TheM‐ISWACOTotalGasContainment(TOGA)Systemisdesignedtocontain,separateandremovethefree

andentrainedgasesfromthedrillingfluidcirculatedfromthewellbore.Totalcontainmentandremovalofthe

gasesfromthefluidisaccomplishedthroughauniquecombinationofM‐ISWACO’sMUD/GASSEPARATOR*

andHighVacuumD‐GASSER*.Thegasisremovedfromthedrillingfluidandventedintoaclosedflaresystem

andburnedatasafedistance,topreventanytoxicorcombustiblegasfromescapingaroundtherigfloorormud

pitarea.



90‐90‐885(Rev.B)



2‐2TOGA*



THISPAGEINTENTIONALLYLEFTBLANK

90‐90‐885 (Rev.B)



TOGA*3‐1

Section3TECHNICALDESCRIPTION

3‐1PRINCIPLESORTHEORYOFOPERATION

Thedrillingfluidcirculatedfromawellmayincludegasand/orformationliquidswhichhaveenteredthewell

bore.Asthefluidapproachesthesurfacethehydrostaticpressureisreduced,andthegasbubblesinthefluid

expandandformheadsormassivepocketsofgas.Theseheadsofgasorgascutmudarecirculatedfromthewell

borethroughtheflowlineorchokemanifoldintoasixinchinletlineontheMUD/GASSEPARATOR*.Thefree

gasisseparatedfromthefluidbyaseriesofbafflesinthevesselandventedintotheflarelinethroughaneight

inchlineonthetopoftheMUD/GASSEPARATOR*Vessel.

3‐1.1MUD/GASSEPARATOR*FloatValve

TheFloatoperatedcontrolvalveinsidetheMUD/GASSEPARATOR*vesselopenstopreventoverfillingofthe

VesselandclosestomaintainaliquidsealontheeightinchMudReturnLine.Theliquidsealpreventsthe

separatedgasfrombeingdischargedintothemudreturnline.

3‐1.2BackPressureManifold

TheBackPressureManifoldisinstalledintheMUD/GASSEPARATOR*VentLinetodampenthesurgeeffects

fromtheexpandinggasandpreventtheblowingofmudintotheVentLine.Abackpressuresettingof15‐50psi

(1.1–3.5kg/cmsquared)isrecommendedontheMUD/GASSEPARATOR*Vessel.

3‐1.3D‐GASSER*

ThegascutmuddischargedfromtheMUD/GASSEPARATOR*isdrawnintotheD‐GASSER*Vesselbya

vacuumforcecreatedbythedischargepipelowpressurejetassembly.Thefluidisdistributedoverabaffleina

thinevenlydispersedlayer.Thisthinlayeroffluidisexposedtoavacuumofatleasteightinchesofmercury

createdbythevacuumpump.Thevacuumforceremovestheentrainedgasesfromthefluidandthedegassed

fluidisdischargedintotheactivesystem.TheentrainedgasremovedfromthefluidbytheD‐GASSER*isvented

intotheclosedflaresystem,down‐streamoftheMUD/GASSEPARATOR*BackPressureManifold.

TheTOGA*systemutilizesM‐ISWACO’sstandardMUD/GASSEPARATOR*andD‐GASSER*whichhavebeen

specificallymodifiedtoassuretotalcontainmentandcontrolofthetoxicgascutmud.ThemodifiedD‐GASSER*

includestwocompletevacuumpumpsystems.Thevacuumpumpexhaustlinesareconnectedthrougha

manifoldcontainingaseriesofcheckvalvestopreventthepossibilityofblowbackfromtheflarelines.Plug

valveslocatedoneithersideofthecheckvalvesareusedtoprovideameanstoisolateandsafelyrepairorreplace

eithervacuumpumpsystemwhiletheotherisstilloperationalaswellastoconfigurethevacuumpumpsystems

foralternativemethodsofoperation.Thefirstalternativeistorunbothvacuumpumpsystemssimultaneouslyto

assuremaximumdegassingefficiencywhenlargevolumesofgasareencountered.Thesecondalternativeisto

provideameansforredundancyintheeventtheprimaryvacuumpumpsystemfailsduringkickconditions.



90‐90‐885(Rev.B)



3‐2TOGA*

3‐1.3D‐GASSER*Continued

AnothermodificationtotheD‐GASSER*isthe3‐wayfloatcontrolledvalvetopreservetheTOGA*System

integrityoftotallycontainingthegasfromthewell.The3‐wayfloatcontrolledvalveisconnectedtotheexhaust

sideofthevacuumpumpstopreventatmosphericairfromenteringthevesselwhenthevalveopenstobreakthe

vacuumwhilecontrollingthefluidlevelinthevessel.Thegasenteringthevesselthroughthe3‐wayvalveis

simplyrecycledgascomingfromthevacuumpumps.

3‐1.4BackFlowManifold

AteelocatedontheMUD/GASSEPARATOR*mudreturnlineconnectsthesuctionlineoftheD‐GASSER*and

themudlinefromtheactivesystemwiththedischargeoftheMUD/GASSEPARATOR*.Themudlinetothe

activesystemmaintainsaconstantflowoffluidtotheD‐GASSER*whenlowflowconditionsfromthe

MUD/GASSEPARATOR*exist.Themudlinefromtheactivesystemhasacheckvalveassemblytoassurethat

gascutmuddischargedbytheMUD/GASSEPARATOR*willnotbypasstheD‐GASSER*andentertheactive

system.



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