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Lightweight Hollow Glass Microspheres Drilling Fluid Flow Through Nozzles

[+] Author Affiliations
O. Kirgil

Turkish Petroleum Corporation, Ankara, Turkey

E. Ozbayoglu, S. Miska, M. Yu, N. Takach

University of Tulsa, Tulsa, OK

C. Mata

3M Advanced Materials Division, St. Paul, MN

Paper No. OMAE2017-62132, pp. V008T11A066; 16 pages
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5776-2
  • Copyright © 2017 by ASME


The objective of this study is to investigate flow behavior and survival ratio of different fluids with Hollow Glass Microspheres (HGM) as they pass through jet nozzles under various flow conditions. Three types of HGM with different compressive strengths (5,000 – 19,000 psi) and specific gravities (0.38 – 0.46) for 10% and 30% volumetric concentrations were tested under 196 – 345 ft/s average fluid velocities from 0.5 – 1.5 inch standoff distances during impact tests using a new High Shear Rate Facility (HSRF). Density measurements before and after each circulation cycle were used for calculating survival ratio of the HGM. Particle size analysis was carried out to see the change in the size distribution of HGM after impact experiments. A scanning electron microscope (SEM) was used to view samples of HGM from before and after impact tests to define breakage behavior. The Hertz Impact Law was used to build a mechanistic model to estimate survival ratio under several assumptions. An empirical equation was developed and compared with experimental results. Breakage type is the result of cyclic fatigue because breakage does not occur in one circulation. Standoff distance, concentration of HGM and velocity of the fluid are strong parameters of the survival ratio function. Size distribution analysis and SEM microphotographs show that larger HGM break first.

Copyright © 2017 by ASME



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