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为更加合理地设计适用于强研磨性硬地层的混合金钢石复合汽钻头(PDC)钻头,首先对东北油田、青海油田钻进火成岩地层磨损的PDC钻头进行收集,运用ST—500A电子显微镜和ⅤⅢⅢ2.2C相机测量软件分别从宏观和微观两个方面观测PDC切削齿的磨损形态,分析其磨损机理,找出失效原因。测量钻头冠部刨面线上切削齿的磨损高度,绘制PDC钻头切削齿磨损分布曲线,为PDC钻头的改进提供理论指导。设计并加工PDC孕镶块混合微钻头进行室内钻孔实验,研究不同切削齿出露量对钻头破岩效率的影响规律,并对PDC孕镶块混合钻头进行优化后设计了一种PDC孕镶块全尺寸混合钻头,用于东北油田辽松盆地金山区块金谷1-1HF井的基底地层钻进,相比同井段的PDC及牙轮钻头,钻速与进尺均有较大提升。
In order to more reasonable design PDC bit for strong abrasive hard formation, we first collect the PDC bit which has been worn in igneous layer of Dongbei Oilfield and Qinghai Oilfield. Using ST-500A electron microscope and ⅤⅢⅢ.2.2C camera measurement software from two aspects of macroscopical and microscopic observation PDC cutter wear morphology, analysis of its wear mechanism to find out the cause of failure. The wear height of cutting teeth on the crowning plane of the bit is measured, and the wear distribution curve of PDC bit cutting teeth is plotted, which can provide theoretical guidance for the improvement of PDC bit. Designing and processing PDC embedded drill bit micro-drill for indoor drilling experiments to study the impact of different cutting teeth on bit breaking efficiency of rock breaking PDC impregnated inserts mixed bit is optimized after the design of a PDC inlay Block Full-size Mixing Bits for Basement Strata Drilling in Jingu Block 1-1HF, Jinshan Block, Liao Song Basin, Northeast Oilfield. Compared with PDC and roller cone bits in the same section, both the drilling speed and the footage are greatly improved.