Development and Application of a Kind of Anti-drop Milling-over Tool
With the development of deep oil and gas resources,the operation depth of petroleum engineering is getting deeper and deeper,and the proportion of tripping operation time in the engineering construction period has increased significantly.Especially in the failure of the completion string with packers,it is often necessary to select different integrated milling-over and fishing tools according to the structural characteristics of the packers.Aiming at the structure of a specific type of packer,this paper develops a new type of integrated milling-over and fishing tool to achieve anti-drop milling-over,which has been successfully applied in Well YLXX.
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