Numerical analysis of drill string whirl for vertical well based on rolling model and small-strain shell element

Cheng, Jinhua; Sun, Youhong; Yu, Yongping; Chen, Lihui; Wu, Jianpeng

doi:10.1016/j.petrol.2022.110565

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…7 illustrates the comparison of BHA vibration response under different WOB conditions, indicating that an increase in WOB does not significantly affect the peak value and fluctuation degree of lateral velocity, acceleration, and rotational speed. This suggests that WOB has a weak impact on the velocity, acceleration, and rotational speed at the bottom of the drillstring, which is consistent with previous research on land drilling [22,26]. However, high rotational speeds can result in complex motion patterns and elevated levels of vibration due to frequent changes between forward and back whirling as well as impacts with the wellbore and riser.…”

Section: Discussionsupporting

confidence: 87%

“…Furthermore, variations in drilling parameters, as well as model parameters, significantly influence the trajectory of drillstring motions. Cheng et al employed shell elements while Cai et al utilized finite beam elements to establish drillstring dynamics models; they focused on analyzing how rotational speed, WOB, and friction coefficient affect whirling and motion trajectories [25,26]. Li et al, employing principles such as minimum energy principle along with Buckingham π theorem-based similarity criteria, constructed numerical models as well as laboratory test benches to investigate how rotational speed, WOB, and friction coefficient impact lateral vibrations [27].…”

Section: Introductionmentioning

confidence: 99%

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Research on the Influence of Deep-Water Drilling Risers on Drillstring Motion Trajectory and Vibration Characteristics

Hai,

He,

Xue

2024

Machines

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The swing of the riser in deep-water drilling can significantly impact the drill string. In this study, we establish a riser model that considers the combined disturbance of periodic dynamic wind and wave loads. By coupling it with the drill string model, we develop a dynamic model for deep-water drilling systems. Through analyzing multiple sets of different drilling parameters, we examine displacements and impact forces at various positions along the drill string system. Specifically, our focus lies on velocity, acceleration, and rotational speed information of BHA. We investigate how WOB and rotational speed influence motion trajectory and vibration characteristics of the drill string within the dynamic model of deep-water drilling systems. Simulation results reveal slight differences in whirling trajectories between inside the riser and below mud line for the drill string. Rotational speed has a greater impact on the drill string compared to WOB; higher rotational speeds lead to increased collision forces between the drill string system and both riser and wellbore. Our findings identify specific combinations of WOB and rotational speed parameters that can stabilize drilling operations within dynamic models for deep-water drilling systems. These research results provide valuable insights for adjusting WOB and rotational speed parameters in deep-water drilling.

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Section: Discussionsupporting

confidence: 87%