Open AccessFlow of cement slurry through an eccentric annulus
Author(s) -
Riayde Hussein Jawad
Publication year - 2020
Publication title -
mağallaẗ al-buḥūṯ wa-al-dirāsāt al-nafṭiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2710-1096
pISSN - 2220-5381
DOI - 10.52716/jprs.v10i1.296
Subject(s) - annulus (botany) , rheology , cement , bingham plastic , laminar flow , geotechnical engineering , slurry , materials science , flow (mathematics) , mechanics , non newtonian fluid , eccentric , engineering , mechanical engineering , composite material , physics
A step by step procedure has been developed to design cement hydraulic during cement jobto minimize non cemented channels or bad cement job by taking into consideration thenon-flow area throughout the eccentric annulus. Since cement slurry exhibit non-Newtonian rheological behavior, a good description of the slurry rheology is required inorder to estimate accurately the velocity profile across the annulus. To achieve this goal,six rheological models have been adopted: Power-law, Robertson-Stiff, Bingham, Casson,Modified Power-law, and Modified Robertson-Stiff Models. Using the last five rheologicalmodels, new frictional pressure gradient equations for laminar flow of cement slurrythrough an eccentric annulus have been derived by the author based on slit-approachapproximation.