定向井/复合井

实验室实验验证钻头对高频扭转振荡的影响

本文讨论了一种全尺寸钻井试验台，首次可以全面研究钻头特性对高频扭转振荡（HFTO）的影响。

加速度计测量点的位置。 左：自由端钻头； 右：固定端驱动。
图1-加速度计测量点的位置。左：自由端钻头；右：固定端驱动。
资料来源：SPE 212566。

高频扭转振荡 (HFTO) 产生的动态载荷可能会损坏钻井工具，导致裂纹、扭曲或电子器件损坏。最近，全尺寸钻井试验台被证明可以在实验室条件下产生经过验证的 HFTO 行为。该钻机可以全面研究钻头特性对 HFTO 的影响。完整的论文提出了限定位特征以抑制 HFTO 的方法。

实验室装备设置

试验台设计。全尺寸实验室试验台在加压岩石室中钻探岩石。

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Directional/complex wells

Laboratory Experiments Qualify Bit Influence on High-Frequency Torsional Oscillations

This paper discusses a full-scale drilling test rig that allows comprehensive study of the influences of bit characteristics on high-frequency torsional oscillations (HFTO) for the first time.

Locations of accelerometer measurement points. Left: free-end bit; right: fixed-end drive.
Fig. 1—Locations of accelerometer measurement points. Left: free-end bit; right: fixed-end drive.
Source: SPE 212566.

High-frequency torsional oscillations (HFTOs) generate dynamic loads that can damage drilling tools, resulting in cracks, twistoffs, or broken electronics. Recently, a full-scale drilling test rig was proven to generate verified HFTO behavior under laboratory conditions. This rig allows for a comprehensive study of the influences of bit characteristics on HFTO. The complete paper presents methods to qualify bit features to suppress HFTO.

Laboratory Rig Setup

Test-Rig Design. The full-scale laboratory test rig drills rocks in a pressurized rock chamber.

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