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PDC Bit Hydraulic and Mud Rheological Simulation to Model Pressure Drop across Bit

Sheng, Ong Kai (2016) PDC Bit Hydraulic and Mud Rheological Simulation to Model Pressure Drop across Bit. IRC, Universiti Teknologi PETRONAS. (Submitted)

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Abstract

When fluid flow from larger into smaller diameter pipes, it experiences a drop in pressure. High pressure drop across bit is an indication of high energy loss in the hydraulic system and also a setback to ROP performance. This is inefficient and pressure pumps would have to be of bigger sizing to make up for the losses. Present form of pressure drop models are in terms of mud density, flow rate, and total flow area. No study on mud rheological parameters specifically the Yield Stress, Consistency Index, and Power Index have been done with respect to pressure drop across bit. The objective of this research is focused on the analysis of CFD simulation and to propose optimized parameters for improved ROP. Single phase flow study of Yield Power Law mud rheology was simulated at bottom hole of horizontal section. For accuracy of simulated results, a mesh independence test was carried out to justify the validity of the simulated results. Preliminary simulation on Yield Power Law Muds showed about 50% reduction of pressure drop across bit as flow rate increase. Parametric study on mud rheology was carried in Design of Experiment.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Petroleum
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Ahmad Suhairi Mohamed Lazim
Date Deposited: 19 Oct 2016 09:10
Last Modified: 25 Jan 2017 09:34
URI: http://utpedia.utp.edu.my/id/eprint/16884

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