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Control of a Rotary Steerable System Directional Drilling Tool Roll-Stabilised Control Unit

Alturbeh, Hamid, Whidborne, James F, Luk, Patrick and Bayliss, Martin (2015) Control of a Rotary Steerable System Directional Drilling Tool Roll-Stabilised Control Unit. In: International Conference on Systems Engineering 2015, 8th- 10th September, Coventry, UK. (Unpublished)

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A directional drilling tool control unit whose design is based on servo control of a
rotary valve using the roll-stabilised instrumented system approach has been successfully used
in oil fields for over twenty years. In this paper, Field Oriented Control (FOC) is applied to
cascaded voltage regulation and servo control using a open-loop plant model of the roll-stabilised
control unit. The servo control is applied to the rotary valve so that drilling mud is ported in
a geostationary direction despite the rotation of the drill string and the bottom hole assembly
of the rotary steerable system. Voltage regulation is applied in order to provide a dc voltage
bus for the servo control of the valve. A torquer or alternator, which is a type of permanent
magnet synchronous machine, is the core of the roll stabilised control unit. So, a mathematical
model of the torquer is derived. An FOC scheme is proposed for servo control and to provide a
dc regulated voltage using the torquers. The algorithm is tested in MATLAB/Simulink.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TN Mining engineering. Metallurgy
Schools: School of Computing and Engineering
Related URLs:
Depositing User: Hamid Alturbeh
Date Deposited: 13 Dec 2016 15:41
Last Modified: 13 Dec 2016 19:31


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