摘要
对于硬度高、研磨性强的地层,PDC钻头在井底存在黏滑振动和寿命短等问题,制约了其进一步的提速提效。鉴于此,根据水力结构周向式振动原理,研制了扭力冲击钻井工具,并开展了现场试验。结合工具内部流体特性数值模拟分析以及室内模拟试验,分析了工具内部流道流体压力和流速的分布特性,以及扭力冲击钻井工具消减PDC钻头黏滑效应的机理。研究结果表明:现场试验中,扭力冲击钻井工具工作稳定,机械钻速平均提高64. 4%以上;高钻压下的钻进效率比低钻压下的钻进效率明显提高;纯钻30. 2 h的钻头起出新度在90%以上。扭力冲击钻井工具具有性能稳定、操作简单、使用方便、寿命长和延缓PDC钻头磨损等特点,是硬质地层钻井提速的有效手段。
To address the stick-slip effect of PDC bit during drilling, a torque impact drilling tool was developed based on the principle of circumferential vibration of hydraulic structure. Combined with the numerical simulation analysis on the internal fluid characteristics and indoor simulation experiment, the distribution of fluid pressure and flow velocity in the internal flow channel of the tool were analyzed. The mechanism of the torque impact drilling tool to reduce the stick-slip effect of the PDC bit was analyzed. The field test shows that, the torque impact drilling tool had a stable work performance, with the average drilling speed increased by more than 64. 4%. The drilling efficiency under high WOB was significantly higher than that under low WOB. The drill bit new degree is more than 90% after drilling for 30. 2 h. The torque impact drilling tool has the features of stable performance, simple-to-operate, easy-to-use, long life and delaying PDC bit wear, it is an effective means to speed up drilling in hard formations.
作者
陈新勇
张苏
付潇
邱晓宁
马谢书
杨恺
Chen Xinyong;Zhang Su;Fu Xiao;Qiu Xiaoning;Ma Xieshu;Yang Kai(Engineering Research Institute,CNPC Bohai Drilling Engineering Company Limite)
出处
《石油机械》
北大核心
2018年第9期29-32,共4页
China Petroleum Machinery
基金
中国石油天然气集团公司项目"复杂井深井提速与安全作业配套技术研究与应用"(2017001001)
中国石油渤海钻探工程有限公司项目"杨税务潜山优快钻井技术研究"(2017ZD11Y-01)
关键词
钻井提速
黏滑效应
扭力冲击工具
模拟分析
现场试验
drilling speed increase
stick-slip effect
torsion impact tool
simulation analysis
field test
