Study on Coupling Vibration Characteristics of Articulated Flexible Drilling Tools in UltraShort Radius Horizontal Wells

LUO Min; MO Yahu; LI Qiaozhen; XU Tingting; LIN Zhiqiang

doi:10.21656/1000-0887.450054

Volume 46 Issue 3

Mar. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(3): 298-309

LUO Min, MO Yahu, LI Qiaozhen, XU Tingting, LIN Zhiqiang. Study on Coupling Vibration Characteristics of Articulated Flexible Drilling Tools in UltraShort Radius Horizontal Wells[J]. Applied Mathematics and Mechanics, 2025, 46(3): 298-309. doi: 10.21656/1000-0887.450054

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Study on Coupling Vibration Characteristics of Articulated Flexible Drilling Tools in UltraShort Radius Horizontal Wells

doi: 10.21656/1000-0887.450054

School of Mechanical Science and Engineering, Northeast Petroleum University,Daqing, Heilongjiang 163000, P.R.China

Funds:

The National Science Foundation of China(51674088)

Received Date: 2024-03-04
Rev Recd Date: 2024-06-10

Available Online: 2025-04-02

Publish Date: 2025-03-01

Abstract

Abstract

The frequent frictional collision between flexible drilling pipe and guide screen as well as drill bit and rock may lead to the failure of flexible drill pipe due to coupling vibration in the side-drilling technology of ultra-short radius horizontal wells, which directly affects drilling safety and efficiency. The coupling vibration mechanics and the finite element model for the articulated flexible drilling tool in the inclined section were established with the contact nonlinearity between flexible drilling pipe and guiding screen and effects of rock force on drill bit. The deformation diagrams of the articulated flexible drilling tool and the acceleration curves of the transverse, longitudinal and torsional vibrations of the flexible drilling tool in different positions, were obtained by analyses of the coupling vibration dynamic responses of the articulated flexible drilling tool. And the effects of bit weights and rotational speeds on the coupled vibration characteristics of articulated flexible drilling tools were discussed. The results show that, the lateral vibration of the flexible drill pipe becomes more severe as the drill is closer to the bit, while the torsional vibration decreases periodically with the well depth. The larger the bit weight is, the bigger the lateral and torsional vibrations of the flexible drilling pipe will be; the larger the rotational speed is, the smaller the lateral vibration of the flexible drilling pipe will be; the longitudinal and torsional vibrations is less affected by the rotational speed.
- flexible drilling tool,
- bit-rock interaction,
- coupled vibration,
- dynamics,
- contact nonlinearity

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References(23)

References

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