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套管回接指的是套管分两批下井,下面的套管柱通过回接装置与上面的套管柱连接起来。当井下情况非常复杂,将全部套管一次下至预计井深很困难或根本不可能时,才采用这种分两批下入的方法。1981年10月,胜利油田新东风10号井钻至4016.77米时,由于井下情况复杂,为继续钻进,需下9 5/8″技术套管封固上部井段。由于裸眼长,井内泥浆比重高,套管直径大,把套管一次下至深4000多米处的把握是不大的。因此,用9 5/8″套管回接装置分两批下套管。实践证明9 5/8″套管回接装置性能良好,它完全能满足套管回接工艺的要求。1983年7月,胜利油田科委经过鉴定,确认该装置是一项技术成果。
Casing Repositioning refers to the casing going down in two batches, with the lower casing string connected to the casing string above by means of the return device. When the downhole situation is very complex and it is difficult or impossible to fully pipe the casing once down to the expected depth, this two-step approach is used. In October 1981, when the new Dongfeng No.10 well in Shengli Oilfield was drilled to 4016.77 meters, due to the complicated underground conditions, it was necessary to place 95 5/8 “technical casing to seal the upper well section. Because of the naked eye length, the mud in the well The proportion of high, casing diameter, the casing once deep to more than 4,000 meters at the grasp is not large.Therefore, with 9 5/8 ”casing back to the device under two sets of casing. Practice has proved that 9 5/8 "casing back to the device performance is good, it can fully meet the requirements of casing back to the process .In July 1983, Shengli Oilfield Science and Technology Commission has been identified to confirm the device is a technical achievement.