| Ort der Herkunft |
Shandong China (Mainland) |
| Marke |
bosun |
Ifthecasinginoillayerisseriouslydamagedortheoillayerisburiedforsloughingsandandtheproductionofthewellcannotbecontinued,"windowing"orsidedrillingcanbecarriedoutinthecasingabovetheoillayertoformanewwellbore,inordertousetheuppercasingandreducethecostofre-drilling. Sidedrillingincasingistore-drilladeviatedwelllaterallybasedonupperpartofcasingoftheseriouslydamagedwell.Itisamethodforrestoringproductioncapacity. Sidedrillingtoolsincludethedeflectingtool,windowingtoolaswellasthedown-holedrillmotorforprovidingpower.