Shengli Drilling Institute independently developed PDC bit to achieve perfect speed
March 15 07:07:13, 2023
Recently, the PDC bit PQ5263S-215.9 independently developed by Shengli Oilfield Drilling Institute has achieved good application results in the Yinshen 4 well drilled by the 50570 team of the Yellow River Drilling North Company. The total drill speed of the three drill bits is 401.77 meters, and the average mechanical drilling speed is 1.34 meters per hour, which is 2.16 times of the average mechanical drilling speed of other drills in the well. The second drill has a footage of 254.73 meters, which is the highest footage of the three open strokes. The Yinshen 4 well is a key exploration well deployed in the Yinchuan Basin in the Western New Area of ​​Sinopec. The lithology of the Qingshui Formation of the well is a set of red and dark gray argillace sandstones containing carbonate rocks, which is difficult to drill. After 3700 meters, the drilling speed is only 0.35 m / h. In order to solve the problem of slow drilling speed of the well and achieve the purpose of speeding up and improving efficiency, the drilling technicians decided to apply the self-developed PQ5263S-215.9 drill bit in the well after discussion and analysis. The drill is a high-efficiency PDC drill specially developed by the Drilling Institute for hard mudstone formations. It is designed with unique PDC cutting tooth angle control technology, 3D design and hydraulic simulation technology. It is processed by 5-axis CNC machining and once clamped. Forming, high processing precision, accurate and complete implementation of the designer's intention. In the Fanjia block, Lijin block and the Weinan block in the Shengli oilfield, the P5263S-215.9 drill bit has a good performance. During the construction of the Yinshen 4 well, Shengli Oilfield Drilling Institute provided three PQ5263S-215.9 high-efficiency PDC bits. The first drill bit was drilled into the well section from 3,716 meters to 3,386.63 meters, with a footage of 120.63 meters and an average mechanical penetration rate of 1.32 meters per hour. After the drill bit is taken out, the cutting structure is intact and the wear is slight, with 95% newness. The mechanical drilling rate is increased by 218% compared to the previous PDC bit. The second drill bit drilled into the well section from 3,841.13 meters to 4,059.86 meters, with an average mechanical penetration rate of 1.43 meters per hour, a new degree of 90%, and a footage of 254.73 meters. At the beginning of the third drill bit, the mechanical drilling speed was faster, drilling to 4112 meters, and the drilling time became slower. From the 4119 meters of debris, the granitic gneiss component was returned to 4122.43 meters. The on-site study decided to drill the heart. . The proof of the heart has been drilled to the granitic gneiss bedrock, and the well has been successfully drilled.
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