Publications

Setting conductor casing in deepwater drilling is a pivotal aspect of well construction, with significant technical and financial implications, particularly in deepwater drilling campaigns. A cross-disciplinary study was required to support the analysis prior to deciding on the most suitable method for setting the conductor.

This paper evaluates method selection based on the drilling environment to enhance operational effectiveness. While jetting in the conductor casing and drilling ahead is the prevailing global practice, it may not always be optimal due to various geological factors

Three exploration wells were drilled in the same area using the same drilling rig, each employing a distinct conductor casing setting approach: two wells utilized jetting, while one well used conventional drilling-casing methods. The first well, completed using conductor jetting, served as a calibration point for determining factors influencing the approach for the subsequent two wells. Successful setting of all conductors to the intended depths was achieved in line with the initial study.

This paper validates the Company’s approach to setting conductors casing in deepwater exploration wells, considering multi-disciplinary factors. It provides guidance for selecting appropriate conductor casing setting methods for similar deepwater drilling projects.