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1、Submersible Pump Cable Overview InitialsINTRODUCTION TO ESP CABLEModular design many optionsInitialsREDA Production Systems - LAWRENCERPS Lawrence is part of the Schlumberger GroupLocated in Lawrence Kansas since 1976Manufacturer of electric power cable and rubber molded components for ESPsProducer
2、of more ESP cable than any other manufacturerCertified to ISO 9001 Includes All aspects of Cable ManufacturingInitialsElectrical Submersible CablePower is supplied to the electric motor by electric cable.Power CableInitialsCable SelectionElectrical PropertiesPhysical DimensionsEnvironmental Resistan
3、ceMechanical StrengthTemperatureHandling ConditionsInitialsCable SelectionThe proper cable size is governed by the amperage, voltage drop, and space available between the tubing collar and casing.InitialsCable SelectionA range of conductor sizes are available to meet application. requirements.Initia
4、lsCable SelectionCables are available in either flat or round configurations. FLATROUNDInitialsCables can be installed in wells where bottom hole temperature is excess of 300 degrees Fahrenheit.Cable SelectionInitialsCONDUCTORINSULATIONBARRIER INJECTION TUBE (optional)JACKETARMORCable ComponentsInit
5、ialsSIZEDAMAGE RESISTANCEFLEXIBILITYCOSTConductor SelectionInitialsADHESION & STRAND BLOCKING- Downhole Performance- Gas transmission- Gas entrapment/corrosion- Corona dischargeCoating / AdhesiveCopperAlloy coatingAdhesiveStrand blockALLOY COATING- Chemical resistanceInitialsAll these calculations a
6、re based on extensive research and Finite Element Analysis (FEA) of downhole cable system modelsConductor Size SelectionInitialsTEMPERATUREPRESSURE CHANGESGAS TO OIL RATIO (GOR)CARBON DIOXIDE ATTACKOIL ATTACKInsulation SelectionInsulationInitialsDefinite melt pointLimited by temperatureEase of proce
7、ssingSimple formulationsThermal failure is often dramaticTHERMOPLASTIC vs.THERMOSETNo melting pointOften higher temperature ratingMore difficult to processComplex formulationsThermal failure is generally gradualPolyproylene CoploymerTHERMOPLASTICEthylene Propylene Diene MethyleneTHERMOSETInitialsExc
8、ellent electrical propertiesLow costAvailable in three different colorsPOLYPROPYLENEADVANTAGES Excellent resistance to well fluidsInitialsUpper temperature range, softens at 205F (96C)Subject to crazing in certain environmentsPOLYPROPYLENEDISADVANTAGESInitialsExcellent electrical properties, althoug
9、h higher power losses (DLA) than polypropyleneAvailable in three different colorsEPDMADVANTAGES Excellent high-temperature stability, has been used at up to 550F (288C) in geothermal wellsInitialsSusceptible to mechanical damage at elevated temperaturesEPDMDISADVANTAGESLimited well fluid resistance,
10、 oil swells EPDM compoundsInitials3 kV: tested at 20 kV DC, 7 kV AC4 kV: tested at 30 kV DC, 10 kV AC5 kV: tested at 35 kV DC, 13 kV ACVoltage Rating and Selection CriteriaOPERATING VOLTAGEVOLTAGE SPIKES/TRANSIENTSMECHANICAL DAMAGEInitialsSurface Voltage is higher than motor Voltage (Voltage drop)En
11、ergy is required to push current through a cableOhms law; V = I(R+XL) = IrL/A+IXLVoltage DropInitialsVoltage Drop GraphInitialsTEMPERATURECHEMICAL ENVIRONMENTGASHANDLINGBarrier SelectionInitialsBarrier TypesTEDLAR TAPE - 300F (150C)TEFLON FEP EXTRUSION - 350F (175C)PROPRIETARY HIGH TEMPERATURE TAPE
12、- 400F (205C)LEAD - 550F (288C)POLYVINYLEDINE FLUORIDE EXTRUSION - 300F (150C)InitialsSUPERIOR HOOP STRENGTHHIGHER TEMPERATURETAPE vs. EXTRUDED BARRIERTAPE ADVANTAGEEXTRUDED BARRIER ADVANTAGES FASTER TO PROCESSInitialsTEMPERATURECHEMICAL ENVIRONMENTGASHANDLING CONDITIONSJacket SelectionJacketInitial
13、s185F (85C), HIGH DENSITY POLYETHYLENE (HDPE)250F (121C), NITRILE 1275F (135C), NITRILE 2350F (176C), NITRILE 3350F (176C), EPDMJacket TypesInitialsEPDM Rubber+ Oil =EXCELLENT HIGH TEMPERATURE STABILITYPOOR RESISTANCE TO OILInitialsGOOD PHYSICAL PROPERTIESPOOR ELECTRICAL PROPERTIESPOOR RESISTANCE TO
14、 WATERNITRILE RubberEXCELLENT RESISTANCE TO OILHARDENS AT TEMPERATURES ABOVE 275F (135C) SLOW DECOMPRESSION RATEInitialsEPDM & NITRILE Jackets Offer Different AdvantagesInitialsDAMAGE RESISTANCEDECOMPRESSION CONTAINMENTCORROSION RESISTANCEArmor SelectionInitialsHEAVY GALVANIZED STEEL (0.034/0.86mm t
15、hick)HEAVY COATING CLASS II GALVANIZED STEELDOUBLE ARMOR (two layers)STAINLESS STEELMONELTWO DIFFERENT ARMOR PROFILES Armor TypesSTANDARD GALVANIZED STEEL (CLASS I)(GSA, 0.020/0.51mm & 0.025/0.64mm thick)InitialsArmor ProFlat profileStandard crown proInitialsREDA Production SystemsCable OptionsIniti
16、als POLYETHYLENE: 185F (85C)REDA Production SystemsCable Families REDALENE: 205F (96C)POTBPPEOInitialsREDA Production SystemsCable Families REDAHOT: 250-350F (121-177C) REDABLACK: 300-400F (149-204C)EERETBEFInitials REDALEAD: 400-450F (203-232C)KELBREDA Production SystemsCable Families MOTORLEADS: 2
17、50-450F (121-232C)InitialsFLAT CABLE EXTENSIONS (FCE) (Motorlead Pothead)MOTORLEAD - Typically smaller conductor than power cable, thus runs hotter. - KEOTB - 250F (121C)- KELB - 450F (232C)- KELTB - 450F (232C)Motor Connection OptionsInitialsPOTHEADS- Tape-In Pothead - Tape wrapped around individua
18、l connector leads inside motor. - Plug-In Pothead - mating block mounted in motor.- Direct Connect Pothead - Power cable attached directly to the Pothead. (Plug-In Type)Motor Connection OptionsInitialsTape-In Pothead vs Plug-In PotheadREDA Tape-In DesignAdvantages:Most ReliableHighest breakdown stre
19、ngth in industryDisadvantagesLonger installation time on rig floor Advantages:Ease of installationDisadvantagesLower breakdown strength Not as reliable as Tape-InInitialsWhat does #4/1 KEOTB 0.015M5F represent?#4/1 #4 AWG Solid conductorK Polyimide (Kapton) primary insulationE EPDM secondary insulationO Nitrile jacketTB Tape (probably Tedlar) & braid0.015 Armor thickness (inches)M Monel armor5 5 kV Voltage rating F Flat cableCable NomenclatureInitials
