【7A文】Evolution of Offshore Drilling Units(近海钻井平台).ppt

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1、EvolutionofOffshoreDrillingUnitsInstructor29/6/2021ObjectivesAtthecompletionofthistrainingmoduletheengineerwill:ClearlybeabletodefinearigtypewiththeenvironmentitisbestsuitedtoListpro/consforthemanytypesofrigavailable39/6/2021WheredidOffshoreDrillingStart?In1897,38yearsafterCol.Drake’swell,H

2、.L.WilliamsdrilledawelloffapierintheSantaBarbaraChannel.5yearslatertherewere150wells“offshore”California.By1921thereweresteelproductionpiersthatran½mileoffshoreatRinconandElwoodCalifornia.In1932asteelpierisland(60’x90’with25’airgap)wasbuiltoffshoreCaliforniatosupportadrillingrig.In1938afield

3、wasdiscoveredoffshoreTexasandanotherwellwasdrilledto9,000ft.offawoodenplatformin1941.49/6/2021Continued–WheredidOffshoreDrillingStart?WorldWarIIstoppedalloffshoreactivity.In1945Louisianahadastateleasesaleinthebaysandnearlandopenwaters.Thiswasfollowedbydrillingoffwoodenpierswithaconsiderablea

4、mountofcoringfrombarges.In1955CaliforniapassedtheCunningham-ShellActallowingoilandgasproductionoffshoreinstatewaters.Priortothiscoringwasallowed:however,nodrillingcouldbedonethroughhydrocarbonformations.59/6/2021Classesofoffshorerigs2classesBottomSupportedFloatingBottomMooredDynamicallyPosit

5、ioned69/6/2021BottomSupportedRigsSubmersiblesBargedesignColumndesignJack-upsMatsupportedIndependentlegSlottypeCantilevertypePlatformsSteeljacketGravitystructureHybridstructureComplianttowerTensionlegplatform79/6/2021FloatingRigsBottomMooredDrillingtenderDrillingbargeDrillshipConventionallymo

6、oredTurretmooredSemi-submersibleSpar/TrussDynamicallyPositionedDrillshipSemi-submersible89/6/2021Submersible:Barge6mwaterSitsonbottomUsedinstillwaters(notrivers)DerrickcanbelevelledDeckmaysitonpostsabovebargetoallowbargetobefullysubmersed99/6/2021Submersible:IslandFloatsinBallaststositonseab

7、edInsideisfilledtogiveartificialgroundlevelDesignedforiceconditionsSuppliedbyice-breakershipsi.e.Sakhalin,CaspianSea109/6/2021Submersible:Columndesign25mwaterCantileveredderrickTriangularorsquaredeck119/6/2021“Richmond”SuctionPileConfigurationandLa