Exact(4)
In the flow control mode the controller automatically raises the bottom hole pressure setpoint, and thereby keeps the reservoir fluid flow to the surface within a tunable threshold.
The controller implements an automatic switching from constant bottom hole pressure (CBHP) regulation to flow control mode in the event of a reservoir kick.
The proposed controller acts in a pressure control mode and tracks bottom-hole-pressure (BHP) set point during normal operations, and automatically switches to a flow control mode in the event of abnormal situations, i.e. gas kick.
The conditions used were column oven temperature 50.0°C, injection temperature 250.00°C, flow control mode linear velocity, pressure 53.5 kPa, total flow 12.0 mL/min, column flow 1.00 mL/min, linear velocity 36.3 cm/sec, and purge flow 6.0 mL/min.
Similar(56)
Many papers discussed flow control in Asynchronous Transfer Mode (ATM) networks where the objective was to utilize the bandwidth not used by traffic carried on Constant Bit Rate (CBR) and Variable Bit Rate (VBR) Virtual Circuits (VCs) [10].
Both the constant power and constant angle modes of power flow control are considered; in each case the influence of the controller design on torsional mode damping is examined over a range of operating conditions.
Each patient was sedated to prevent spontaneous breathing effort, and ventilated using the volume control mode with a square flow profile.
For proportional flow control, we optimized the orifice position considering vibration mode.
This unwanted effect may be neutralized by the use of BIPAP (Drager Evita I-II) as a pure Pressure Control Mode that compensates the additional flow required to the TGI technique.
The control mode of the master controller is converted from PQ control to V/f control mode.
Second, the adoption of partial-arc control mode is capable of controlling steam flow rate linearly.
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