Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
MODELING AND CFD SIMULATION OF A DAWNHOLE TURBINE MOTOR (TURBODRILL) IN DIRECTIONAL DRILLING
Submission Author:
Felipe Silva dos Santos , MG , Brazil
Co-Authors:
jessica viana, Sávio Sarkis
Presenter: Felipe Silva dos Santos
doi://10.26678/ABCM.ENCIT2016.CIT2016-0366
Abstract
Turbodrill were the first downhole motors that found widespread application. The first turbines adopted commercially and tested for drilling in the USSR were conceived and designed by M.A. Kapelyushnikov in 1923–1932. Turbodrill is a type of hydraulic axial turbomachinery, which has a multistage blade consisting of stators and rotors. It converts the hydraulic power provided by the drilling fluid to mechanical power through turbine motor while diverting the fluid flow through the stator vanes to the rotor vanes. A turbodrill power section is entirely metallic (metallic turbine blades, metallic shaft, metallic housing, etc.), therefore, the tool is extremely resistant to high temperatures and high pressures. Historically, turbodrills have proven to be the most reliable drive mechanism in elevated temperature environments. In many cases, turbodrills are the exclusive drive mechanism used in high temperature/high pressure areas because of the tool’s ability to reliably operate in extreme environments. Numerical simulations of a downhole turbine motor (Turbodrill) are presented which are optimised for Coiled Tube Turbodrilling in deep hard rocks mineral exploration applications. This paper presents computational fluid dynamics (CFD) simulations of a single stage turbodrill performance with different rotation speeds and mass flow rates. As a result optimum performance parameters are proposed for gaining the required rotation speed and torque for hard rocks drilling.
Keywords
Turbodrill, CFD, Optimum Performance
