Parametric Analysis of Drilling Fluid Displacement Efficiency during Liner Cementing with Rotation at Non-Zero Eccentricity

Author details
  • PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • TatNIPInetft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • Schmidt Institute of physics of the Earth of the Russian academy of sciences, Moscow, Russian Federation; Moscow Institute of Physics and Technology (National Research University), Moscow, Russian Federation
  • Schmidt Institute of physics of the Earth of the Russian academy of sciences, Moscow, Russian Federation
  • TatNIPInetft R&D Institute of the PJSC TATNEFT named after V.D. Shashin, Almetyevsk, Russian Federation
  • Schmidt Institute of physics of the Earth of the Russian academy of sciences, Moscow, Russian Federation

Abstract

Displacement or “pushing” of drilling mud is a typical and most frequently repeated operation in the process of fixing borehole walls. The replacement of drilling mud with cement in the annular space is carried out in compliance with the regime of movement of the solution, which is characterized by the rheological properties of the substituted and replacement fluids, the density difference between drilling and cement mortars, the design features of the well, the direction of its trunk and the drilling equipment used, as well as the operation of the circulation system of the drilling rig. To optimize the replacement process with a multiphase non-Newtonian fluid, this article presents a parametric analysis of the effectiveness of drilling mud replacement during cementing of a rotating shank in the study of steady-state flow of cement mortar in the area between two coaxial cylinders rotating relative to each other and around their axes. The influence of the following parameters on the efficiency of replacing drilling mud with cement has been studied: the eccentricity of the centralizer, the frequency of its rotation around its axis and about the axis of the casing, the radial displacement of the centralizer, and an increase in the effective radius of the area of movement of the centralizer. The results of the eccentricity of the centralizer, the frequency of its rotation around the centralizer around its axis and about the centralizer, the frequency of the centralizer around the axis of the well on substitution efficiency; rotational speed of the centralizer around its axis on substitution efficiency are constructed; dislocation affects the effectiveness of substitution. The change in the critical rotation frequency of the centralizer around the axis of the well from the rotation frequency around the axis of the well is presented. It was revealed that the centralizer rotating around the axis of the well is practically insensitive to movement in the radial direction. The conclusions about the effectiveness of replacing drilling mud with cement with rotation compared to standard replacement without rotation were confirmed.

Keywords

drillingcementdrilling mudstabilizerrotationanalytical solutions

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Article information

Published
21 November 2025
Issue date
21 November 2025
Issue
Vol. 25, No. 4 (2025)
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