Pressure management drilling by using micro flow control system

The technology of micro flow control for drilling fluid has been developed recently in accordance with the problem of wellbore pressure control during drilling process. This technology uses sensors and chokes along drilling fluid route to examine parameters like pressure, flow rate, circulating density and to give feedback control. The micro flow control technology belongs to pressure management drilling. It can balance wellbore pressure through controlling back pressure at wellhead, thus achieving accuracy control of wellbore pressure.