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ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL STUDY OF FLUID-STRUCTURE INTERACTION OF A MODEL OF DOWN-HOLE SAFETY VALVE SUBJECTED TO SLUG FLOW
Submission Author:
Luis Felipe Acuna Alegria , SP
Co-Authors:
Luis Felipe Acuna Alegria, MARLON MAURICIO HERNANDEZ CELY, Oscar Mauricio Hernandez Rodriguez
Presenter: Luis Felipe Acuna Alegria
doi://10.26678/ABCM.ENCIT2022.CIT22-0299
Abstract
The governing differential equation that describes the two-phase-fluid/structure interaction, in its dimensionless form, is used to scale up geometric terms of a problem associated with a typical down-hole safety valve (DHSV) installed in oil wells, which has as main function to avoid spills of hydrocarbons in offshore production scenarios. The motivation is the report of failures that can be linked to vibrations induced by internal two-phase flow, probably in the slug flow pattern, which are of high amplitude and low frequency. Scaling up was done with special attention because there are certain geometric, kinematic and dynamic conditions that must be fulfilled for a given problem to be similar. Real field information from the oil and gas industry was used not only to obtain the geometrical dimension the valve’s model, but also to define the experimental flow conditions that will serve to reproduce a condition dynamically similar to real scale oil and gas production. The scaling-up study is done in a simplified way considering a valve working fully open, because the real valve actuates interrupting the flow when there is a high pressure, therefore, when there is no situation, the valve behaves as part of the tube. Consequently, experimental tests are carried out with air and water at 1,0 (bar) and 27°C, at different volumetric flows, strategically chosen according to the information available in the flow map constructed for this particular purpose.
Keywords
Fluid-Two-Phase/Structure Interaction, Two-Phase Flow-Induced Vibrations, Slug flow-pattern, Down-Hole Safety Valve
