Fishing钻井打捞常用工具

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1、FishingPracticesandFishingToolsFishingisthegeneraltermusedtodescribethespecialtechniquesthatareemployedtorecoveritemsorequipmentfromdownhole.Theseitemsorequipmentstuckintheholepreventnormaloperationfromcontinuing.Asaresult,theymustberemovedasrapidlyaspossi

2、ble.Thelongertheequipmentremainsinthehole,themoredifficultitistorecoverit.Detailsoftools,equipment,andproceduresareincludedinthissection.Causesoftroublerequiringfishingoperationsfatiguefailures,causedbyexcessivestressinthedrillstringfailureofdownholeequi

3、pmentonaccountofcorrosionorerosionbydrillingfluidspartingofdrillstringbecauseofexcessivepullwhenattemptingtofreeequipmentstuck.mechanicalfailureofpartsofdrillbitaccidentaldroppingoftoolsorotherundrillableobjectsintothehole.stickingofdrillpipeorcasingCa

4、tegoryofFishingToolsFishingToolsforTubularProducts*insidefishingtools*outsidefishingtools*hydraulicandimpacttools*others•MiscellaneousFishingEquipment*millingtools*junkbasket*magneticfishingtools*othersFishingtoolsselectionThetablebelowpresentsthetypesoffi

5、shingtoolsandtheirapplications.StandardFishingAssemblyOvershot-Fishingbumpersub-DC-fishingjar-DC's-Accelerator-HWDP.Thisconfigurationmaybemodifiedtosuitparticularconditions.Thenumberofdrillcollarsdependsonwhatisavailableandwhatmaybealreadydownhole.Toachiev

6、ethemaximumjarringeffect,theamountofdrillcollarsinthefishingassemblyshouldequaltheamountofthosealreadydownhole.StandardFishingAssemblyWithanacceleratorinthefishingassemblythenumberofdrillcollarsmaybesubstantiallyreduced.Anacceleratorisrecommendedforallfish

7、ing.Additionalinformationcanbefoundinthemanufacturersliterature.Asafetyjointshallnotberunwhilefishing,becausesafetyjointsarelikelytofreezewhenjarred.However,afullopeningsafetyjoint(drivejointmadeforjarring)maybeusedwhenawash-overstringisrun.Thisfullopening

8、safetyjointisrunbelowthestandardfishingassemblysothatinternalcuttersmayberunwhenthewash-overstringsticksandhastobebackedoff.StandardFishingAssemblyDetaileddrawingsofthefishingassemblyshallbemadeandkept,before