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StuckPipePreventionSelf-LearningCourseSUGARLANDLEARNINGCENTERStuckPipePreventionSELF-LEARNINGCOURSEUSEFULPRE-REQUISITES“APrimerofOilwellDrilling”SugarLandLearningCenterStuckPipePreventionSelf-LearningCourseIntroductiontoself-learning:Self-learningenablesyoutolearnatyourpace,inyourtimeandinyourway.Thiscoursebookprovidesthecontent,structureandorganizationofyourlearningwhichwouldotherwisebemanagedbyaninstructorinaclass.Italsoasksyouquestionstohelpyoutoconfirmyourunderstanding(astheinstructorprobablywould).Youwillalsofindarecapsectionthatwillbeusefulforyoutoreviewtheimportantpointsstressedinthisbookafteryourtraining.Attheendisaglossarycontainingthekey-wordsrelatingtothesubject,andtheanswerstothequestions.Structure:Eachsectioncontains:Explanationofthesubject,illustratedasmuchaspossible.Questions(theanswersareinAppendixB).Howtousethecoursebook:Trytodothecourseinamaximumof2hours,withabreak.Setyourselfinasuitableenvironment(nonoise,nointerruptions,etc...).Afterreadingasection,usetheself-testquestionstoconfirmwhatyouhaveunderstood.Writedowntheanswersonasheetofpaperandchecktheanswersattheendofthebook.Itisyourresponsibilitytoanswerhonestly.Ifyougetananswerwrong,gobacktothesectionindicatedandreviewthesubject.Afewdayslater,oratanymoment,usetherecapsectionandtheglossarytorefreshyourknowledgeofthesubject.Remember:Learningisyourresponsibility.ThisbookprovidesyouwithagoodpreparationbeforetheseminartotheSugarLandLearningCenterandgivesyouachancetolearnmorebynotstrugglingwiththebasics.SugarLandLearningCenterPage2Revised:December1999StuckPipePreventionSelf-LearningCourseTableofContentsIntroduction.........................................................................................................................51.Whatisa“StuckPipe”?.................................................................................................72.Mechanisms...................................................................................................................92.1DifferentialSticking................................................................................................112.2InadequateHoleCleaning.......................................................................................162.3ChemicallyActiveFormations...............................................................................182.4MechanicalStability..............................................................................................202.5Fractured/FaultedFormation..................................................................................222.6OverpressuredFormations.....................................................................................242.7HighDipSloughing...............................................................................................262.8UnconsolidatedFormations...................................................................................282.9MobileFormations.................................................................................................302.10UndergaugeHole.................................................................................................322.11KeySeating..........................................................................................................342.12WellboreGeometry...............................................................................................362.13Junk.......................................................................................................................382.14CollapsedCasing..................................................................................................392.15Cementrelated......................................................................................................402.15.1CementBlocks...............................................................................................402.15.2GreenCement................................................................................................41Questions:Mechanisms................................................................................................433.Prevention....................................................................................................................453.1Planning.................................................................................................................473.2MonitoringattheWellsite....................................................................................48Questions:Prevention...................................................................................................524.Recapsection...............................................................................................................534.1Summary................................................................................................................55AppendixA:Glossary.....................................................................................................61AppendixB:AnswerstoQuestions.........................