PDC for gas drilling bit manufacturer will show you the role of torque
Publishing time：
Sep 24,2021
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The manufacturer of PDC for gas drilling bit tells you in practice that when using PDC drill bits, the shape of the torque curve is closely related to lithology.
The manufacturer of PDC for gas drilling bit tells you in practice that when using PDC drill bits, the shape of the torque curve is closely related to lithology. The manufacturer of PDC for gas drilling bit tells you that the torque curve of roller cone bits is relatively straight. Generally, the torque value of mudstone is low, and the torque value of sandstone is high, but the high-frequency and high-amplitude oscillation curve appears in the later stage of the bit.
The PDC bit is different. The high-frequency and high-amplitude oscillation curve appears when it first encounters sandstone, and the oscillation frequency and amplitude of the curve are closely related to lithology. Mudstone shows a straight curve or small amplitude, low-frequency oscillation, and sandstone shows a high-amplitude oscillation curve. As the lithology changes from finer to thicker, the oscillation frequency and amplitude of the torque curve also tend to increase. In addition, in the later period of use of PDC bit, the torque value generally increases, but the frequency and amplitude of the curve oscillation decrease. It shows the relationship between torque and lithology. When drilling into mudstone, the torque value is small and the amplitude is small; the PDC for gas drilling bit manufacturer tells you that when drilling into sandstone, the torque value is large and the amplitude is large.
The PDC for gas drilling bit manufacturer tells you that although the driller is given the rated top drive speed, the instantaneous speed shown on the top drive speed sensor is ever-changing. The amplitude frequency of the top drive speed curve has a certain consistency with the change of the torque curve amplitude frequency. Therefore, like the torque, the change of the top drive speed also reflects the change of lithology.
The PDC for gas drilling bit manufacturer tells you that unlike the torque curve, the top drive speed curve oscillates symmetrically around a fixed value. The oscillation amplitude becomes larger when it encounters sandstone, and the oscillation amplitude becomes smaller when it encounters mudstone. The manufacturer of PDC for gas drilling bit tells you that the oscillation axis of the torque curve is curved, and its axis value changes with changes in lithology. The top drive speed oscillation axis is a vertical line.
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