Development and field test of micro-flux control pressure drilling system

Micro-flux control pressure drilling technology is advanced today. The annulus pressure of well pore can be real-time monitored and controlled precisely in closed loop, by small variation of flux in inlet and outlet, annulus pressure surveillance while drilling, automatically throttle adjusting return pressure and pressure compensation in ground. Through development of micro-flux control pressure Drilling and field trial, the matching equipment has been completed, to form a technological system. The field trial mainly bases on the Micro Flux Control-MFC to effectively prevent the incursion of formation fluid, and reduce the possibility of well kick, well loss, and decrease the non-production aging, improving the economic efficiency of drilling-well, as well as the security of drilling operation and efficiency in complicated condition. The application of technology successfully on site has in complicated formation has accumulated the experience, which can be an example for the technology.