射吸式冲击器在塔里木地区的现场应用

摘要

随着油气勘探开发向纵深发展,深井、超深井数量逐渐增多,钻遇地层硬度随之增大,机械钻速大大降低.针对该问题,研制了射吸式冲击器.通过给钻头提供高频的轴向冲击力,辅助破岩,从而大大提高机械钻速.室内实验验证了射吸式冲击器的高频轴向冲击振动可以为钻头提供一定的冲击力.现场试验结果表明,使用射吸式冲击器后,机械钻速提高了133.0%,并且射吸式冲击器的井底纯钻时间达到130 h,工具井下工作时间154 h,寿命大幅度提高.该项研究结果为射吸式冲击器在钻井过程中的合理应用提供了理论依据.%With the development of oil and gas exploration and development in depth,the number of deep and ultra deep wells has gradually increased.Meanwhile,the hardness of the drilled formations has subsequently increased,the drilling speed is also greatly reduced.To solve this problem,a fire-suction impactor is developed.By providing the high frequency axial impact force to the drill bit,auxiliary rock breaking is achieved,thus greatly improving the rop.Otherwise,laboratory experiments show that the high frequency axial impact vibration of the fire-suction hydraulic impactor can provide some impact to the drill bit.On-site experimental results show that the rate of mechanical drilling speed is increased by 133.0% after using the fire-suction hydraulic impactor.And the drilling time of fire-suction hydraulic impactor reaches 130 h,the downhole working time is 154 h, greatly improving the service life.The results of the study provide a theoretical basis for the reasonable application of the fire-suction hydraulic impactor in the drilling process.