s135鉆桿鋼氧腐蝕和腐蝕疲勞影響因素的研究

1、西北工業(yè)大學(xué)碩士學(xué)位論文S135鉆桿鋼氧腐蝕和腐蝕疲勞影響因素的研究姓名：王磊申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：李金山王新虎20060301曲北1j業(yè)人學(xué)l學(xué)碩F僥論文ABSTRACTInthepetroleumwelldrillingproject，drillpipecorrosionandcorrosionfatiguearemainfactorstocausedrillpipefailureInrecentyears，

2、withthewelldrillingtothedevelopmentofhighlydifficultwells，suchasdeepwell，largedisplacementwell，horizontalwelletctheproblemofdrillpipecorrosionandcorrosionfatigueisbecomingmoreserious，demandingpromptsolutionTheS135drillpi

3、pesteelwasselectedastheresearchobjectinthepaper；theoxygencorrosionandcorrosionfatiguebehaviorofdritipipesteelwasstudiedOnthebasisofthetheoryanalysissystematicallyandtheX—raydiffractionanalysisofcorrosionproducts，theoxyge

4、ncorrosionmechanismin3％NaClsolutionofdrillpipesteelwasstudiedThecorrosionofdrillpipesteelintheneutralorweakalkalinesolutionwasthefunctionofoxygendepolarization；atthesametimeoxygencorrosionwascontrolbyoxygenin3％NaCldrillf

5、luiddiffusionCourseoftheliquidThoughthedynamicsimulatedtestoftheindoorautoclave，theinfluencelawthatoxygencontent，drillfluidtemperature，drillfluidvelocityofflowandsaltdensityofthedrillfluidhadstudiedseparatelyTheresultind

6、icatesthattheinereaseoftheoxygencontentofthedrillfluidandvelocityofflowwillpromoteoxygencorrosionrateofthedrillpipesteel，andithavedoubleaffectionthatdrillfluidtemperatureandsaltcontentontheoxygencorrosionrateofthedrillpi

7、pesteelAthreepointbendingtestofcorrosionfatiguein35％NaClsolutionfordrillpipesteelwascarriedoutinthepapercombinewiththetheoryandanalysis，thebehaviorofcorrosionfatigueofnearthresholdareaandParisareaofdrillpipesteelofBNKand

8、NKKdrillpipesteelhasstudieddeeplyandsystematicallyOriginsoftwarewasadoptedtofittothedrillpipesteellinearlywhileanalyzingonthecorrosionfatiguecrackofParisarea，twokindsofdrillpipesteelexpandstherelationbetweenthecorrosionf

9、atiguecrackrateandamplitudeoffactorofintensityofstresshadestablished，thetheoreticalfoundationinadvanceforthesurplusfatiguelifewithdefectdrillpipesteelhadestimatedandofferedDetectinginstruments，suchasthemetallographicelec