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Experimental Study on Hydrodynamic Behavior of Drilling Fluid by Fluidizing Granular Materials in an Annulus

Esmailpour, Reza | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 46705 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Jamshidi, Saeed; Molaei Dehkordi, Asghar
  7. Abstract:
  8. During the drilling process, cutting concentration in vertical and inclined wells is a common problem and major issue in designing hydraulic parameters. This is becoming more important in near bit area. Cutting transport usually is affected by several parameters such as mud rheology, flow rate, nozzle size, rotation speed, and mud weight.
    In this work it was aimed to design a new set-up to test all the factors on hole cleaning phenomenon especially in near bit area. The set-up consists of a 16 feet long flow loop, 3.28 feet height of the test section, and 3.33 inches inner diameter of the test section. Each parameter which has an impact on hole cleaning could be varied. The cutting transport was examined by three different densities, viscosities, flow rates, rotational speeds and nozzle sizes. For each test, 0.66 pounds of solid particles were used. After each test, the amount of output particles was evaluated under turbulent fluid flow regime.
    In conclusion, in this thesis result show that: Wider nozzle size increases the chance of stuck pipe and bit balling. This will be highly likely, especially at lower flow rates and viscosities. In turbulent flow in near bit region the amount of recovery with smallest nozzle size can be 84%. Totally turbulent flow is more applicable in near bit section to have a better hole cleaning compare to the time that the fluid velocity is entered into the transition zone
  9. Keywords:
  10. Drilling Fluid ; Drilling Cutting ; Flow Rate ; Experimental Design ; Rheological Properties ; Milling Tools ; Hydrodynamic Behaivoir ; Hydrodynamical Properties

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