Technology and practice of fishing seriously-corroded tubings in Tahe Oilfield

Due to ultra depth of wells, formation fluid corroding,HTHP, electrochemical corroding, workover damage, etc. , the corrosion and fracture of tubings in the Tahe Oilfield are increasing year by year, which bring a lot of troubles in the fishing process. Based on special fishing measures, proper choice of tools and reasonable technological parameters according to downhole conditions, the corroded tubings in well T801(K) have been fished successfully. This provides good experience to fish severely-corroded tubing.