元坝地区新型金刚石钻头的研究与应用

Research and Application of New Type of Diamond Bit in Yuanba Area

摘要:

川东北元坝地区是我国天然气勘探开发重点区域，但该地区地质构造复杂，机械钻速低，施工周期长，特别是自流井组底部和须家河组一直是制约该地区钻探提速的“瓶颈”。针对该地层的特点研制了不同结构和性能的金刚石全面钻进钻头，试验证明刀翼式和二次镶嵌式金刚石全面钻头配套国产螺杆钻进工艺是非常有效的，既降低了成本又缩短了钻进时间，达到了钻探提速的目的。

Abstract:

The Yuanba area in northeast of Sichuan is a key area for natural gas exploration in China. But the complicated geological structure, low penetration rate and long construction period, especially at the bottom of Ziliujing formation and Xujiahe formation, have always been the bottleneck restricting drilling speed in this area. According to the formation characteristics, diamond bits with different structures and properties were developed. The experiments showed good effects in the blade cutter and second insert bits matching with the domestic PDM. The drilling rate was improved with lower cost and shorter time.