Study on Collision Characteristics of Rotating Rod Strings in Annulus Fluid With Wellbores Based on Nested Grids

YUE Qianbei; WANG Xiaoxiao; CAO Wen; LIU Yueqiu; LI Hui; XU Yanlu

doi:10.21656/1000-0887.430183

Volume 44 Issue 5

May 2023

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Article Navigation > Applied Mathematics and Mechanics > 2023 > 44(5): 543-559

YUE Qianbei, WANG Xiaoxiao, CAO Wen, LIU Yueqiu, LI Hui, XU Yanlu. Study on Collision Characteristics of Rotating Rod Strings in Annulus Fluid With Wellbores Based on Nested Grids[J]. Applied Mathematics and Mechanics, 2023, 44(5): 543-559. doi: 10.21656/1000-0887.430183

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Study on Collision Characteristics of Rotating Rod Strings in Annulus Fluid With Wellbores Based on Nested Grids

doi: 10.21656/1000-0887.430183

School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, P.R.China

Received Date: 2022-05-31
Rev Recd Date: 2022-09-12
Publish Date: 2023-05-01

Abstract

Abstract

To solve the contact problem between the rod string immersed in annulus fluid and the wellbore, a numerical solution method for the collision was established based on the nested grid technology. The annulus fluid domain was divided into 2 sub-domains: the background grid and the component grid. Then, the interpolation calculation formula for the flow field boundary transferred information in each nested domain was derived and the coupling between the annulus fluid domain and the rod solid domain was solved with the subdomain-based method. Through comparison of the frontal and oblique collision experiments on spherical particles and wall surface in stationary fluid, the correctness of the proposed numerical method was verified. The results show that, the force and velocity of the collision between the rod string and the wellbore decrease with the fluid viscosity, i.e., the collision intensity is negatively correlated with the fluid viscosity. Moreover, the force and velocity of the collision between the rod string and the wellbore increase with the rotation speed of the rod, i.e., the collision intensity is positively correlated with the rotation speed.
- nested grid,
- annulus fluid,
- rotating rod string,
- collision

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References(18)

References

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