Well Abandonment Using Hydraulic Tubing Release Tool

Abstract

SUMMARYTraditional abandonment of a well is accomplished by setting multiple cement plugs to achieve zonal isolation. By setting longer plugs to cover multiple zones and thus having fewer cement jobs, rig time and operating costs can be significantly reduced. However, there are limitations to the length a cement plug can be set conventionally without increasing the operational risks such as stuck pipe. The Hydraulic Tubing Release Tool was introduced on a deepwater exploration and appraisal well campaign in East Africa. It has been used successfully on 5 wells to set long abandonment plugs, ranging from 700m to 1800m.