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AVS Electronic Circulating Valve
www.intelligentdrillingtools.com
Technical Summary IntelligentDrillingToolsintroducetheAnnularVelocitySplitfloworAVSelectroniccirculatingvalvewithsplitflowandfullbypasspositions.AVSisanelectronicmulti-positioncirculatingvalve.TheAVStoolsarenotactivatedbydropballsordartsoranyothertypeofmechanismdeliveredfromsurfacethroughthedrillpipe.Thetoolsareelectronicand intelligent,meaningtheyhaveonboardsensorswithlogicandcanrespondtosurfacecommandssentby“Downlinking”acodedsignaltothetoolviaapatternofpumpson/offandspecificRPMaccordingtoafunctionmap.TheAVStoolsreadthesignalsandshifttotheparticularpositionrequested.
TheAVShas3positions:
1. Through Bore–allthedrillingfluidflowgoesdirectlythroughthetool,BHAandBit.
2. Split Flow–Thisisanopenpositionthatcanbenozzledtoallowacertainamountoftheflowtobediverted into theAnnulus,bypassing theBHA.ThiscanbeengineeredusingIDT’sSplitFlowsoftwaretoallowtheminimumflowrequirementtopowerMWD/RSS/Motor/Bithydraulicsetc.,andtheremainderouttotheannulus.ThismaximisesAnnularVelocityforagivensurfacepressureincreasingHoleCleaningability.
3. Full Bypass–ThispositionopensuptheTotalFlowArea(TFA)furtherandthusallowingmaximumflowratetotheannulusforthehighestAnnularVelocityatthelowestsurfacepressure. In addition, if Lost Circulation Material (LCM) is pumped, the tool can pass150ppbcoarseLCM.AballvalveclosesofftheboretoensurethattheDrillingtoolsandBitdonotbecomeblockedbytheLCMmaterial.
Features Benefits
• No drop balls, Darts or RFID tags • Can be run in any inclination well
• Command via surface Downlink • Can be activated in Horizontal wells • • Simple and Rapid commands • Can be run anywhere in the BHA
• Throughbore at all times • Can be run below an MWD
• Battery powered. Low power draw • Splitflow maximises Annular Velocity
• In excess of 200 cycles • Up to 150ppb LCM through Bypass Position
• Splitflow position with Variable Nozzles • LCM will not enter BHA in Bypass position
• Bypass position with BHA shutoff • Cleans hole while drilling in Splitflow
• 4in2 TFA in full Bypass position • No waiting for Balls and Darts to drop
AVS Applications
TheAVShasmultipleapplicationsincluding:
ü Maximiseholecleaningwhiledrillingü PumpingLCMü Jettingstabiliserspreventingpackoffs
ü RunbehindReamerü SubseaRiser/BOPJettingü HolecleaningwithTaperedString
AVS Electronic Circulating Valve
www.intelligentdrillingtools.com
Technical Specification
AVS ToolOD(in) 8.25 ToolID,min(in) 2.36 ToolLength(ft) 17 ToolWeight(tonne) 1.05 TotalFlowArea(in2): Pre-ActivationTFA(ThroughBore) 4.37 SplitFlowTFA(ToAnnulus),min/max* 0.20/0.44 FullBypassTFA(ToAnnulus) 4.00 NumberofPorts 4
NumberofCycles >200 MaximumFlowRate(gpm) 1200
MinimumActivationFlowRate(Water)(gpm)** <400 MaximumDifferentialPressure(psi) 5000 Pre-ActivationPressureDropAcrossTool(Water)(psi) 45@1000gpm MaximumTensileLoad(lbs) 600,000
MaximumTorsionalLoad(ft-lbs) 88,000 MakeupTorque(ft-lbs) 52,000 ToolJointEndConnections(BoxxPin) 65/8APIREG TemperatureRating(°C)max. 150
*NozzleTFAcanbeselectedtofitSplitflowProfile **DependsonBitTFA/hydraulics
Splitflow Position Bypass Position