DOI QR코드

DOI QR Code

경사 환형관내 고-액 혼합 유동특성에 관한 연구

Study on Solid-liquid Mixture Flow in Inclined Annulus

  • 김영주 (한국지질자원연구원 광물자원연구본부) ;
  • 김영훈 (경남대학교 조선해양IT공학과) ;
  • 우남섭 (한국지질자원연구원 광물자원연구본부)
  • Kim, Young-Ju (Mineral Resources Research Division, KIGAM) ;
  • Kim, Young-Hun (Naval Architecture, Ocean and IT Engineering, Kyungnam University) ;
  • Woo, Nam-Sub (Mineral Resources Research Division, KIGAM)
  • 투고 : 2011.08.25
  • 심사 : 2011.10.17
  • 발행 : 2011.10.31

초록

This study carried out a series of experiments involving impact tests (Drop Weight type & Charpy type with a standard specimen and newly designed I-type specimen), hardness tests, and fracture surface observations of French-made roll shell steel (F), abnormal roll shell steel (M), reheated roll shell steel (R), and S25C steel under heat treatment conditiAn experimental study was carried out to study the solid-liquid mixture upward hydraulic transport of solid particles in vertical and inclined annuli with a rotating inner cylinder. The lift forces acting on a fluidized particle play a central role in many important applications such as the removal of drill cuttings in horizontal drill holes, sand transport in fractured reservoirs, sediment transport, the cleaning of particles from surfaces, etc. In this study a clear acrylic pipe was used to observe the movement of solid particles. Annular velocities varied from 0.4 to 1.2 m/s. The effect of the annulus inclination and drill pipe rotation on the carrying capacity of a drilling fluid, particle rising velocity, and pressure drop in a slim hole annulus were measured for fully-developed flows of water and aqueous solutions of CMC (sodium carboxymethyl cellulose) and bentonite. The rotation of the inner cylinder was efficient at carrying particles to some degree. For a higher particle volume concentration, the hydraulic pressure loss of the mixture flow increased because of the friction between the wall and solids or between solids.

키워드

참고문헌

  1. Iyoho, A.W. (1980). Drilled-Cuttings Transport by Non-Newtonian Drilling Fluids Through Inclined Eccentric Annuli, Ph.D. Dissertation, University of Tulsa, Tulsa, OK-USA.
  2. Larsen, T.I. (1990). A Study of Critical Fluid Velocity in Cuttings Transport for Inclined Wellbores, M.S. Thesis, University of Tulsa, Tulsa, OK-USA.
  3. Tomren, P.H. (1979). The Transport of Drilled Cuttings in an Inclined Eccentric Annulus, M.S. Thesis, University of Tulsa, Tulsa, OK-USA.
  4. Lauzon, R.V. and Reid, K.I.B. (1979). "New Rheological Model Offers Field Alternatives", Oil and Gas Journal, Vol 77, pp 51-57.
  5. Kim, Y.J., Hwang, Y.K. and Woo, N.S. (2002a). "A Study on the Transitional Flows in a Concentric Annulus with Rotating Inner Cylinder", International Journal of KSME, Vol 14, No 10, pp 833-843.
  6. Kim, Y.J., Hwang, Y.K. and Woo, N.S. (2002b). "A Study on the Transitional Flows in a Concentric Annulus with Rotating Inner Cylinder", International Journal of KSME, Vol 14, No 10, pp 833-843.
  7. Woo, N.S., Kim, Y.J., Hwang, Y.K., Yoon, C.H., Han, S.M., Lee, D.K., Park, J.M. and Park, Y.C. (2008). "Flow Characterisitcs of Solid-Liquid Mixture Flow in a Slim Hole Annulus", Geosystem Engineering, Vol 45, No 1, pp 8-17.