The Shunbei Oilfield is deeply buried,making drilling and completion difficult.There are various types of lining pipes with small inner diameters,which gradually lead to lining pipe blockage during production and operation,resulting in oil well shutdown.Due to the limitation of the inner diameter of the lining pipe,it does not meet the requirements for conventional drilling tools to handle blockages.The article analyzes the types and blockages of lining pipes in Shunbei Oilfield,and introduces the techniques for treating lining pipe blockages using rod shaped grinding shoes and continuous tubing.At present,Oil Production Plant 4 has successfully completed 3 well operations,accumulating valuable experience in treating liner blockage for ultra deep wells.
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