surface driven screw pump
surface driven screw pump
地面从动螺杆泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In the light of the frequent breaking of the rod string in a surface driven screw pump well, the force condition of the string in the well is analyzed by means of the elastoplasticity theory.
针对井口驱动螺杆泵抽油杆柱断脱频繁的问题，应用弹塑性理论分析了抽油杆柱在井中的受力状况。
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