Daqing Horizontal Well Casing Development And Application Of The Annex

In recent years, Daqing oilfield drilling technology is still using traditional way, casing cementing operation use ordinary float hoop floating shoe and lifter, there are some problems: one is the casing perfusion fluid sticky card processing accident happened casing, 2 next casing process, due to the wall and casing lifter, the friction between the difficulties.In this paper, under balanced drilling bottom hole pressure control theories and technical operations for a certain depth of research, including under balanced drilling, well control and the difference between conventional well control; under balanced drilling bottom hole and the negative pressure method for determining the value of theory and field control; under balanced drilling well control equipment, structure and working principle; under balanced drilling under balanced drilling accidents and well control the future of new technologies. Results include the bottom of the basis for the calculation of negative pressure values, under balanced drilling, well control and the differences between conventional drilling well control, down hole pressure control, well control equipment in under balanced drilling applications in the form of under balanced drilling of a holistic understanding.