钻井液英语Word下载.docx
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钻井液英语Word下载.docx
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mudcake泥饼
mudweight(density)泥浆重量(密度)
viscosity粘度
filtrate滤液
waterloss失水
gelinitial初切力
gelstrength静切力
solidcontrolequipment固控设备
shaleshaker振动筛
desander除砂器
desilter除泥器
centrifuge离心机
screencloth筛布
ply层
mesh(筛布)目
PH酸碱值
mudpit泥浆池
MBT=methylenebluetest亚甲基蓝测定法
KCL氯化钾
lime石灰
SAPP=sodiumacidpyrophosphate粒状焦性磷酸钠
NaOH氢氧化钠,烧碱
mudtank泥浆罐
mudgun泥浆枪
triptank(起下钻)泥浆计量罐
activetank上水罐,在用罐
intermediatetank过渡罐
GPM=gallonperminute加仑/分钟
1USgallon美加仑=3.785liters升
1barrel桶=0.159cubicmeters立方米
1SG(比重)X8.33=1ppg磅/加仑
2.阅读练习
1.固控设备评价和建议
PerformanceofSolidRemovalEquipmentInRIG5003&
Recommendations
Preparedby
AmmarA.Marouf
DrillingFluidsEngineer
50003队固控设备的性能特点和建议
Introduction
Thetypesandquantitiesofsolidspresentindrillingmudsystemsdeterminethefluiddensity,viscosity,gelstrengths,filtercakequalityandfiltrationcontrol,andotherchemicalandmechanicalproperties>
Solidsandtheirsvolumesalsoinfluencemudandwellcosts,includingfactorssuchas,rateofpenetration,hydraulics,dilutionrates,torqueanddrag,surgeandswabpressures,differentialsticking,lostcirculation,holestability,andbitballing,theseinturn,influencetheservicelifeofbits,pumpsandothermechanicalequipment.
Chemicals,claysandweightingmaterialsareaddedtodrillingmudtoachieveviariousdesirableproperties.Drillsolids,consistingofrockandlow–yieldingclays,areincorporatedintothemud.Thesesolidsaffectmanymudpropertiesadversely.Nevertheless,sinceitisnotpossibletoremovealldrillsolidseithermechanicallyorbyothermeans–Theymustbeconsideredacontinualcontaminantofamudsystem.
Solidremovalisoneofthemostimportantaspectsofmudsystemscontrol,sinceithasadirectbearingondrillingefficiency.Moneyspentforsolidscontrolandforsolvingproblemsrelatedtodrillsolidsrepresentsasignificantportionofoveralldrillingcosts.Solidcontrolisaconstantproblemeveryday.oneverywell.
Fundamentals
Drillingmudsolidsmaybeseparatedintotwocategories:
LowGravitySolids(LGS)withSpecificGravityinthe2.3-2.8range,andHighGravitySolids(HGS)withSGof4.2orhigher.WeightingmaterialssuchasBariteorHematitecomprisetheHGScategoryandareusedtoachievedensitiesgreaterthat10PPG.Drillsolids,claysandmostothermudadditivesfallintotheLGScategoryandoftenatetheonlysolidsusedtoobtaindensitiesupto10ppg
Oneoftheprimaryusesfordrillingfluidstocarryunwanteddrilledsolidsfromtheborehole.Thesolidsareessentiallyacontaminantand,ifleftinthemud,itcanleadtonumerousoperationalproblems.Threeoptionstomaintaindrillingfluidproperties
∙Donothingandletthesolidbuildup.Whenthemudnolongermeetsspecification,dumpitandstartwithfreshmud.
∙Dilutethemudandrebuildthesystemtokeepthepropertieswithacceptableranges,whiledumpingexcessmudtothereservepit.
∙Lowerthesolidcontentofthemudthroughsolidsremovalequipmenttominimizetheaddition/dilutionnecessarytomaintainacceptableproperties.
Inrecentyears,increasedpublicawarenessofenvironmentalissueshasprovidedbothregularlyandeconomicincentivestominimizedrillingwaste.Inmanyinstances,thefirsttwochoiceshavebecomeveryexpensiveandunacceptable.Thishasservedtostresstheimportanceofthethirdoption,efficientsolidcontrol.Usingsolidscontrolequipmenttominimizeaddition/dilutionvolumesisnormallymosteffectiveandprovidethefollowingbenefits:
❑LowerwaterrequirementsandLessmixingproblems
❑IncreasedpenetrationratesReducedtorqueanddrag
❑LowerECD&
Reducedsystempressurelosses
❑BettercementjobsandReducedformationdamage
❑Lessdifferentialsticking
❑Reducedenvironmentalimpact
Itisapparentfromthislistthattheroleofsolidcontrolisinstrumentalinthemaintenanceofgooddrillingfluid.Althoughthebenefitsfromgoodsolidscontrolarenumerous,thecostsavingsarenotappearinnormaldrillingcostaccounting.
Usuallythedrillingfluidgetsmostofthecredit(orblame)sincemudmaterialconsumptioniseasilytrackedandthemudpropertiesaretheonlydirectindicationofsolidscontrolperformance.Inrealisticsense,themudandthesolidscontrolequipmentareintegralpartofonesystem.Onecannotplanthemudwithoutconsideringthesolidcontrolsystemandviceversa.
Solidcontrolisaccomplishedbyusingoneormoreofthebasicmethodsofsolidseparation:
-
vSettling
vScreening
vHdrocyclones
vRotatingCentrifuges
HydocyclonesandcentrifugeusecentrifugalforcetoobtainhigherratesofSeparation
thancanbeachievedbygravitationalset
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