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Experimental in Investigating of Automated Bottom Hole Pressure Control Drilling (MPD)

Mohammadi, Moslem | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 50124 (56)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein; Jamshidi, Saeed
  7. Abstract:
  8. MPD technique manages drilling pressure to keep bottom hole Pressure balanced in the well. The objective to this studs, is to approximate the well pressure to formation pressure to prevent entry of fluid into the well. MPD is a new method drilling in which, driller controls the annulus pressure in order prevent drilling problems. the circulating fluids system employed by MPD technology is more akin to that of a pressure vessel. In this thesis, using in laboratory-made machine, reacts with sudden changes in pressure at the bottom hole in the shortest possible time. Basically, this system is a system where well bore pressure management is obtained by adjusting the pressures along the well bore using an electrical choke valve at the return line in the annulus and control fluid injector pump. The results of the thesis indicate that this device reacts with sudden changes in pressure at the bottom of the well in the shortest possible time, and by controlling the pressure in the well from any reduction in pressure (leakage) in the bottom of the well and the well prevents log cake. Hardware used in laboratory-made machine include a variety of ICV (Inflow Control Valve) and their control systems. These valves can be two position (open / closed) or have a few chances. Often we can use a control system which used the AVR micro controller for opening and closing the ICV. Available sensors are pressure, and flow and etc. Two main software help us in programming & simulation of circuits with micro controller AVR
  9. Keywords:
  10. Formation Pressure ; Inflow Control Valves ; Over Balance Drilling (OBD) ; Underbalanced Drilling ; Managed Pressure Drilling (MPD) Technology

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