Method for Avoiding Differential Sticking During Drilling and Evaluation Operations Using Independent Rotary Dynamic Sleeve System

Abstract Differential stuck-pipe incident occurs when the planned drilling operations suspended with no further ability to proceed forward, nor backward. This is due to downhole forces that are restricting the entire drill-string movement, while the string sink into the filter- cake. In most of the cases differential stuck-pipe resulted by either excessive overbalance applied when a high mud weight is required for well control purposes, high equivalent circulating density correlated with inadequate hydraulics, or when the deficient filter-cake failed to achieve its desired aids. Differential stuck-pipe incident considered as one of the most significant drilling troubles that are solely has the largest share of NPT (Non-Productive-Time) across drilling and workover horizons. It could happen while drilling actions, for instance when stopping for adding more drill-pipes to be able to continue drilling and deepen the well, or based on other planned flat time operations. The flat time operations vary in line with its different scopes, one of which is the open hole logging (well evaluation operations). The deployment of this operation would be based on drill-pipe conveying manner configured with the logging tool. In this activity, the drill-pipe designed to be stationary across the open hole for hours per single station in order to perform the required formation evaluation, whilst the risk of being differentially stuck will increase more. Therefore, to meet the required objectives and eliminate the associated risk of being differentially stuck, an innovative approach established to present a proactive solution for avoiding such an incident utilizing an independent system recognized as drill-pipe rotary dynamic sleeve system. These dynamic layers/sleeves to be deployed on the outer body of the drill-string, in order to work against differential sticking mechanism separately. This system designed to provide swift rotation for the sleeves consolidated on top of the drill-pipes to provide full independent rotary motion while the string being completely stationary at ongoing operation.