博孜区块新型表孕镶金刚石全面钻头的研究与应用

针对塔里木油田博孜区块巨厚砾石层的岩性差异大、可钻性差、钻头机械效率低和使用寿命短的问题,本文从刀翼式结构、中心强化、表孕镶多级人造金刚石配方、分体烧结工艺等方面对配套高速涡轮钻具钻进的新型表孕镶金刚石全面钻头进行了设计与研究。研制的Ø333 mm表孕镶金刚石全面钻头在博孜区块进行现场应用,钻头的平均机械钻速2.01 m/h,寿命300 m,与进口孕镶金刚石全面钻头相当,但成本远低于进口钻头,大幅度提高了该地层勘探开发的施工效率,降低了勘探成本。

Research and application of the new surface impregnated diamond bit in the Bozi Block

In view of greatly heterogeneous lithology,poor drillability,low mechanical drilling efficiency and short service life of the bit in the massive gravel layer of the Bozi Block,Tarim Oilfield,a new surface impregnated diamond bit for the high?speed turbodrill is designed and studied from the aspects of the blade structure,central strengthening,multi?stage surface impregnated synthetic diamond formula and separate sintering process.The average ROP of the bit is 2.01m/h with the service life up to 300m,which is equivalent to that of the imported impregnated diamond bit,while the cost is far lower than that of the imported bit.The new bit greatly improves the construction efficiency of exploration and development of the formation and reduces the exploration cost.