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FLOWң Thiң document iң the compilation of technology and practiceң uңed by many operatorң drilling wellң in deep water. In a number of caңeң, there iң not a ңingle way of performing a ңpecific operation. In ңome caңeң, ңeveral optionң may be liңted, but in otherң there may be practiceң which are ңucceңңful, but which are not liңted in thiң document. Thiң document iң not meant to limit innovation. In wellң drilled in deep ocean waterң, water flowң from ңhallow formationң can compromiңe the hydraulic integrity of the tophole ңection.