High-efficiency drill bit helps Shunbei Oilfield's innovation record
October 14, 2022
Recently, through the application of new drilling speed-increasing processes such as hybrid drill bit and sharp-toothed PDC drill bit, Shunbei 1-8H and Shunbei 1-9 respectively created 111.83 days and 116.04 days respectively, and the igneous igneous intrusion coverage area and igneous rock in Shunbei Oilfield. The shortest record of the drilling cycle in the intrusion footprint has laid a solid foundation for efficient development. The thickness of the Paleozoic strata in the Shunbei Oilfield is more than 2,500 meters. The strength of the Permian igneous rocks is high. The Silurian mud shale is highly plastic, resulting in a drilling speed of only 3.1 m/h in the early stage, which restricts the exploration and development process. In order to achieve safe and rapid drilling, the drilling technicians of Northwest Oilfield conduct research on bit individualization according to the characteristics of the stratum and the parameters of rock mechanics, and optimize the application of high-efficiency drill bits. The hybrid drill bit closely combines the crushed rock with the roller cone bit and the sheared rock of the PDC bit. The pre-crushing of the cone tooth reduces the rock strength, improves the cutting efficiency of the composite sheet, and finally improves the rock breaking efficiency. The sharp-toothed PDC bit is The main cutting teeth are designed to be alternately distributed between the round-shaped cutting teeth and the trapezoidal teeth. The round-toothed teeth can be preferentially contacted with the bottom of the well. It is easy to eat into the plastic formation to form pre-cutting, which drives the rear trapezoidal teeth to form a “ploughing” effect and improve the bit attacking ability. . The Shunbei 1-8H well is used in the Permian strata with the mixing drill bit and the sharp-toothed PDC bit drilling speed-up process. The two-drilling drill completes the 486-meter footage, and the drilling cycle is only 8.98 days, which is 33% shorter than the adjacent well; The 9 wells used the sharp-toothed PDC drill bit + high-torque screw to successfully drill the old open hole section of the Paleozoic. The mechanical drilling rate was 8.34 m / h, which was 43% higher than that of the adjacent well. The drilling speed was remarkable.
