深水钻井喷射下导管过程中钻柱扭振规律研究及其应用
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摘要
在深水钻井喷射下导管过程中,带有泥浆马达和钻柱,随钻下入36英寸(1英寸≈2.54 cm)导管.结合这一工作情况,建立了钻柱的扭应变能方程和动能方程,根据能量守恒方程的瑞利原理,求解在此条件下的钻柱固有频率方程。该频率方程考虑了钻柱长度、外径、内径,钻铤的长度,外径、内径和导管外径、内径、长度等9个几何参数的影响。该频率方程具有较强的可操作性,同时在理论分析上更切合实际,因此,采用这套分析和计算方法,对于指导现场合理确定工程参数、避免扭振、保障井下安全及防止井下事故具有重要意义。
In deepwater dislling, 36-inch conductors are set using the drill string with mud motor. For tihs case, the torsional energy equation and kinetic energy equation of the drill string are established, and the natural frequency equation of the drill string under this condition is solved according to the Rayleigh principle of the energy cnservation equation. The frequency equation takes into account the effect of nine geometric parameters, i.e., the length, the outer diameter and the inner diameter of the drill string, those of the dirll collar, and those of the conductor. Such an equation has strong practicabibty and make the theoretical analysis fit better with the actual situation. Therefore, the use of this set of analysis and calculation method is of great significance to guide the resonable determination of engineering parameters, the avoid ance of torsional vibration, jeopardize the ensurance of down-hole operation safety and the pervention of down-hole accidents.
In deepwater dislling, 36-inch conductors are set using the drill string with mud motor. For tihs case, the torsional energy equation and kinetic energy equation of the drill string are established, and the natural frequency equation of the drill string under this condition is solved according to the Rayleigh principle of the energy cnservation equation. The frequency equation takes into account the effect of nine geometric parameters, i.e., the length, the outer diameter and the inner diameter of the drill string, those of the dirll collar, and those of the conductor. Such an equation has strong practicabibty and make the theoretical analysis fit better with the actual situation. Therefore, the use of this set of analysis and calculation method is of great significance to guide the resonable determination of engineering parameters, the avoid ance of torsional vibration, jeopardize the ensurance of down-hole operation safety and the pervention of down-hole accidents.
引文
[1] 姜伟.弯曲井眼内钻杆应力变化特性研究与应用[C].深水钻完井技术理论与实践专集.北京:石油工业出版社,2015:29.
[2] 姜伟.深水钻井隔水导管起下过程中的自由振动频率研究[C].深水钻完井技术理论与实践专集.北京:石油工业出版社,2015:20.
[3] Jiang W,Wang L.Research on horizontal vibration of heavy weight drill pipes in directional dirlling [J].Chian Ocean Engineering,1992,6(4):12.
[4] 史密斯MS.结构动力学[M],五■四翻译小组译.北京:国防工业出版社,1979:55-56.
[5] 孙训芳,方孝波,陆洪耀.材料力学(上册)[M].北京:人民教育出版社,1978:87-88.
[6] 汤姆逊W T.振动理论及其应用[M].胡宗武译.北京:煤炭工业出版社,1980:193-195.
[7] 程守洙,江之永,朱永春,等.普通物理学[M].北京:高等教育出版社,1983:120-125.
[2] 姜伟.深水钻井隔水导管起下过程中的自由振动频率研究[C].深水钻完井技术理论与实践专集.北京:石油工业出版社,2015:20.
[3] Jiang W,Wang L.Research on horizontal vibration of heavy weight drill pipes in directional dirlling [J].Chian Ocean Engineering,1992,6(4):12.
[4] 史密斯MS.结构动力学[M],五■四翻译小组译.北京:国防工业出版社,1979:55-56.
[5] 孙训芳,方孝波,陆洪耀.材料力学(上册)[M].北京:人民教育出版社,1978:87-88.
[6] 汤姆逊W T.振动理论及其应用[M].胡宗武译.北京:煤炭工业出版社,1980:193-195.
[7] 程守洙,江之永,朱永春,等.普通物理学[M].北京:高等教育出版社,1983:120-125.