关于切削型多节式刮刀钻头的分析研究

Analytical Research on Cutting Type Multitier Wing Bit

刮刀(翼片)钻头在泥岩和页岩等软地层中可以得到高的机械钻速和长的钻头进尺,但是在硬地层和软硬交错地层,特别是在研磨性地层中,钻进效率低,钻头磨损快,钻头寿命受到影响。俄罗斯南方国立技术大学ТретьякА.Я.教授研制出了一种切削型两节式Д-2ВВ钻头。这种钻头包括2个圆锥形回转节:领眼钻进部分回转节和井筒形成部分回转节,彼此独立、布置同轴,通过行星齿轮传动机构驱动,可以按不同(相反)方向回转,保证镶有数个PDC复合片切削具的刀翼,不论其处于如何位置,在单位时间内行走的路程都是相同的,所以磨损是均匀的,因而提高了耐磨性,提高了钻探的技术经济指标。该项技术取得了俄罗斯发明专利。

In drilling engineering, especially in petroleum and gas drilling, the wing bit is widely used due to its simple de- sign and easy manufacture, good penetration rate and long footage in soft formations drilling, such as clay and shale forma- tions. However in hard and soft-hard interbedded formations, especially in abrasive formation drilling, its penetration rate is low and rapid bit wear influence its service life. ТретьякА.Я., who is a professor of South-Russian State Technical Uni- versity, has worked out a cutting type two-tier wing bitД-2ВВ, two conic rotating tiers are mounted on the bit body for pi- lot drilling and well drilling （ not depending on each other and located at the same axis of rotation）, driven by planetary gearing transmission mechanism. They can rotate in different （opposite） directions to guarantee that the cutter wings with several PDC composite plates passing the same distance in unit time, no matter where they are. In this case, the bit wear resistance is improved by uniform bit wear with improved technical and economic indexes of drilling. This technology has obtained the Russia invention patent.