【7A文】钻井工程英文课件12.1 Coring.ppt

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1、1Coring12.1-1Coring12.1-2CoringforODPCoring12.1-3PlanningODPVirtuallyeverythingiscored–continuouslyWhatgoesintotheplanningWhattypeofcoringtoolswillbeusedCoring12.1-4HowitisphysicallyaccomplishedCoringassemblyisrunonthebottomofthedrillingassembly.Weightisappliedtothecorebitandthed

2、rillstringisrotated.DoughnutiscutbythecorebitCoreisswallowedbythecorebarrel.Coring12.1-5ToolsCoreBitsCoreBarrelsCoring12.1-6AdvancedPistonCorerSchematicoftheAPCbeforeandafterstrokingouttheinnercorebarreltotakeacore.Pumppressureinsidethedrillstringseverstheshearpinsandallowstheinn

3、ercorebarreltostrokeout9.5min2–3swith~27,000lbofforce.Comparisonofsedimentcorequalitybetweenrotarydrillingandpistoncoring.Coring12.1-7AdvancedPistonCorerCoring12.1-8AdvancedPistonCorerTemperatureContinuoustemperaturemeasurementsarerecordedwiththeAPCTcoreshoeembeddedinthesediment.

4、Coring12.1-9ExtendedCoreBarrelSchematicoftheXCBretractablecuttingshoeinstandardcoringmode.TheXCBshoeextends6to14in.aheadofthebitinverysoftformationsandretracts~7in.(insidethemainbit)asweightonbitexceedsabout12,000lb(collapsesacoilspring).Coring12.1-10ExtendedCoreBarrelAn11in.APC/

5、XCBbitandsoftformationXCBcuttingshoe.Coring12.1-11RotaryCoreBarrelSchematicoftheRCBcoringsystemincoringmodewithabareseafloorspud-in.Acenterbitcanberunontheinnercorebarreltodrillaheadwithoutcorerecovery.Coring12.1-12RCBRollerConeBitCoring12.1-13AdvancedDiamondCoreBarrelFigure1.Sch

6、ematicoftheADCBshowingthebit,outercorebarrel,andinnercorebarrel.TheADCBisanadaptationofaminingstyle"PQ"coringassembly.Coring12.1-14PressureCoreSamplerSchematicofthePCSinthe"coringahead"mode(withtheballvalveopentoacceptcore)(left).Aftercuttingthecore(right),thewirelineispickedupto

7、releasetheball,whichredirectsfluidtoliftthecoretubefor"coreretrieval"mode(withthecoretubeandcoreretractedinsidethetoolandtheballvalveclosed).Arrowsindicatefluidflow.Coring12.1-15BitsforPCSTherearethreebitsavailableforrotarycoringwiththePCStool:RBIaugerbit(A),Christiansenstandardb

8、it(B),andRBIPDCbit(C).Coring12.1-16Tripp