For screw pump well, the following accidents, such as rod breaking, wax locking and pump burning, always happened.
螺杆泵井运行过程中经常出现杆柱断脱、蜡卡、烧泵等现象。
Analysis screw pump system, get the mechanical model of rod string, deduct and calculate undertaking load of rod string.
通过对螺杆泵采油系统进行分析，得到抽油杆柱力学模型，并对杆柱所承受载荷进行推导计算。
Active water or light oil is sent downhole through hollow rod to reduce oil flow resistance, thus producing heavy oil from deep formation through screw pump.
利用空心杆向井筒内掺入活性水或稀油，降低油流阻力，实现应用螺杆泵开采深层稠油。
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