经现场5口井试验表明，不弯曲钻铤能够起到增大下部钻具组合刚度，控制直井段井斜的作用；
The on-site tests of 5 wells showed that the stiffness of lower drill pipe assembly was increased to control deviation in the straight hole.
考虑下部钻具组合的弯曲效应和接触状态，运用间隙无法对下部钻具组合进行了受力变形计算。
The force and deformation of bottom hole assembly (BHA)are calculated by the gap-element method, in consideration for the bending effect and contact state of BHA.
运用纵横弯曲连续梁理论和达朗伯原理，建立了偏轴钟摆钻具组合动力学分析模型。
A mechanical model for the offset-axes pendulum drill assembly (OAPDA) was established according to the continuous beam theory and the d.
文中给出了钻压和转速对预弯曲动力学防斜打快钻具组合防斜力的影响规律。
Also, it is described the influence of bit pressure and rotate speed on anti-deviation force of the BHA of anti-deviation and fast penetration with pre-bending dynamics.
为保证井下安全，气体钻井常常不使用或少使用稳定器，此时钻具组合更易发生弯曲而引起井斜。
Stabilizer is not used or used seldom in gas drilling to ensure the downhole safety. At this time, bottom-hole assembly bends easily resulted in well deviation.
为保证井下安全，气体钻井常常不使用或少使用稳定器，此时钻具组合更易发生弯曲而引起井斜。
Stabilizer is not used or used seldom in gas drilling to ensure the downhole safety. At this time, bottom-hole assembly bends easily resulted in well deviation.
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