Research on Construction Scheme for Relieving Collapse and Stuck Drilling Based on Auxiliary Circulation

This paper focuses on the challenging issue of handling collapse and sticking accidents during offshore oil drilling operations and proposes an innovative solution—utilizing auxiliary circulation technology to remove the stuck drill pipe. As one of the most severe accidents during the drilling process, collapse and sticking severely affect drilling progress and can potentially lead to significant economic losses. Traditional sticking removal techniques, such as mechanical and chemical methods, face numerous limitations when dealing with collapse and sticking. To address this issue, this paper designs and implements a “simple dual-port auxiliary circulation sticking removal device.” By establishing an auxiliary circulation above the sticking point, the device utilizes the force of circulating flushing to remove accumulated debris, effectively resolving the sticking issue. During the research process, the principle of auxiliary circulation sticking removal was deeply explored, the relationship between top drive tension and blockage thickness was analyzed, the sand carrying capacity of drilling fluid was studied, and auxiliary circulation parameters were designed. Case applications in actual drilling operations demonstrate that this solution is easy to operate, cost-effective, and highly safe and reliable. This paper not only successfully resolves the collapse and sticking issue in specific wells but also provides new solutions for similar sticking situations.