扭力冲击器破岩机理及现场应用研究
发布时间：2019-05-12 14:02
【摘要】：当前,随着钻井深度的不断增加,钻遇地层日益复杂。深部底层岩石硬度大,机械钻速很低,极大地影响了钻井周期,硬地层钻井速度有待提高;另外,以剪切破岩为机理的PDC钻头普遍存在粘滑问题,导致钻井效率降低,甚至降低钻头寿命,因此,提高PDC钻头的破岩效率是当前钻井界的重要课题。本文以研究PDC钻头的粘滑振动现象为基础,通过分析粘滑振动现象对机械钻速的影响为思路,研究了扭力冲击器的工作原理。论文研究的内容包括:PDC钻头的粘滑振动机理,扭力冲击器的破岩机理及其在元坝地区、玉北6A、鸭深1井、新垦8-H井以及伏19井的现场实例分析。系统地分析了深部硬地层条件下,扭力冲击器形成的冲击载荷对钻速的影响。理论及现场实例分析结果表明:扭力冲击器通过将钻井液的能量转化为低幅、高频脉冲扭矩,不仅可以显著提高钻井速度,而且可以有效减少或消除硬地层钻井过程中钻头的有害振动,保护钻头,延长钻头寿命。扭力冲击钻井是新兴的高速破岩技术,本论文研究工作对粘滑振动机理的普及和扭转冲击钻井技术的发展具有重要的现实意义。
[Abstract]:At present, with the continuous increase of drilling depth, drilling formation is becoming more and more complex. The hardness of deep bottom rock is large and the drilling speed is very low, which greatly affects the drilling cycle, and the drilling speed of hard formation needs to be improved. In addition, there is a common stick-slip problem in PDC bit based on shear rock breaking mechanism, which leads to the decrease of drilling efficiency and even the decrease of bit life. Therefore, improving the rock breaking efficiency of PDC bit is an important topic in the drilling field at present. Based on the study of stick-slip vibration of PDC bit, the working principle of torque impactor is studied by analyzing the influence of stick-slip vibration on drilling speed. The research contents of this paper include the stick-slip vibration mechanism of PDC bit, the rock breaking mechanism of torsional impactor and its field examples in Yuanba area, Yubei 6A, Yushen 1 well, Xinken 8-H well and Fu 19 well. The influence of impact load formed by torsional impactor on drilling speed under the condition of deep hard formation is analyzed systematically. The results of theoretical and field analysis show that the torque impactor can not only significantly improve the drilling speed by converting the energy of drilling fluid into low amplitude and high frequency pulse torque. Moreover, it can effectively reduce or eliminate the harmful vibration of the bit in the process of hard formation drilling, protect the bit and prolong the life of the bit. Torsional impact drilling is a new high speed rock breaking technology. The research work in this paper is of great practical significance to the popularization of stick-slip vibration mechanism and the development of torsional impact drilling technology.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE92
，
本文编号：2475446
[Abstract]:At present, with the continuous increase of drilling depth, drilling formation is becoming more and more complex. The hardness of deep bottom rock is large and the drilling speed is very low, which greatly affects the drilling cycle, and the drilling speed of hard formation needs to be improved. In addition, there is a common stick-slip problem in PDC bit based on shear rock breaking mechanism, which leads to the decrease of drilling efficiency and even the decrease of bit life. Therefore, improving the rock breaking efficiency of PDC bit is an important topic in the drilling field at present. Based on the study of stick-slip vibration of PDC bit, the working principle of torque impactor is studied by analyzing the influence of stick-slip vibration on drilling speed. The research contents of this paper include the stick-slip vibration mechanism of PDC bit, the rock breaking mechanism of torsional impactor and its field examples in Yuanba area, Yubei 6A, Yushen 1 well, Xinken 8-H well and Fu 19 well. The influence of impact load formed by torsional impactor on drilling speed under the condition of deep hard formation is analyzed systematically. The results of theoretical and field analysis show that the torque impactor can not only significantly improve the drilling speed by converting the energy of drilling fluid into low amplitude and high frequency pulse torque. Moreover, it can effectively reduce or eliminate the harmful vibration of the bit in the process of hard formation drilling, protect the bit and prolong the life of the bit. Torsional impact drilling is a new high speed rock breaking technology. The research work in this paper is of great practical significance to the popularization of stick-slip vibration mechanism and the development of torsional impact drilling technology.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE92
，
本文编号：2475446
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