APPLICATION OF CONTINUOUS STEERABLE DRILLING TECHNOLOGY IN HUABEI OILFIELD

The continuous steerable drilling technology is a new drilling technology.This technology has been applied in 12 wells drilled by No.4 Drilling Company in Huabei Oilfield, and during the field operation, different BHAs were selected according to different formations and PDC bits were used when drilling the steerable section.MWD tools were used in the first well, and with the help of the self-developed drilling software, the drilling parameters were continuously adjusted according to the real time conditions, thus the well was smoothly drilled to the bottom.As compared with the indexes of last year, the penetration rate of the 12 drilled wells was improved by 53.24% and the monthly speed of per rig improved by 41%, while the drilling period was cut by 9.34d per well and well construction period cut by 11.44d.It was concluded that the 0.85°single-bent screw drills could be used for the directional drilling with hole inclination of less than 20°and the combined drilling, and this technology would be widely used in the near further.