Real Time Well Engineering: String (Drillstring/ Casing/Completion) Runnability Monitor While Drilling

Abstract

Abstract The objective of this study is to monitor and forecast how well the casing string can be run during the drilling of the well's particular hole section. The runnability of the casing is measured by the use of a comprehensive index supported by real-time monitoring of multiple features with estimated indicators. The methodology developed by combining geometrical and mechanical calculations provides an assessment of whether the casing can be run without a short landing. This provides more opportunities for adjustments that can be made during drilling itself. In general, the "smoothness" that connects the wellbore geometry and mechanical system is related to the borehole quality utilized to run the casing. With real-time drilling parameters and complex equations represented with common sense, it is possible to assess the runnability of the casing for a given hole size. When taken together, wellbore tortuosity, borehole torsion, wellprofile energy, well curvature passage through force, margin of slack off force and overpull margin support the evaluation of a proposed wellpath to determine the casing's runnability. Combining operational experience and trajectory metrics in a methodology has proven to be effective in assessing operational risk for tasks like running casing in curve construction sections or to total depth on prolonged laterals. In addition, this paper discusses how the runnability metrics can help to anticipate or diagnose other challenges such as complex stimulation work, artificial lift performance and possible well servicing complications that may arise because of unwanted curvature, borehole torsion and wellbore drift. Presently there is no method to predict the runnability of casing to bottom while the well is being drilled. A new and practical method of quantifying the runnability of casing during drilling has been analyzed and proposed in this paper.