抽油泵抽油时,由于泵筒内外压差的作用,泵筒的径向变形问题是普遍存在的。无论泵挂多深,这种变形都会发生。但以往抽油泵是在浅井和中深井的浅泵挂下使用,泵筒径向变形比较小,由此引起的漏失和对泵产生的其它影响也较小,因而没有引起人们的重视。 随着油田深井开发的需要和抽油设备的发展,抽油泵深泵挂采油正在迅速地得到应用。例如,胜利油田和江苏油田的深抽泵挂深度已超过2600m,其它油田也在不同程度上采用了 Oil pump pumping, due to the pressure difference between the pump cylinder inside and outside the role of the radial distortion of the pump cylinder is widespread. No matter how deep the pump is hung, this deformation can occur. In the past, however, the pump was used under shallow pumps in shallow wells and medium-deep wells. The radial deformation of the pump cylinder was relatively small, resulting in less leakage and other effects on the pump. Therefore, no attention was paid to this. With the development of deep well in oil field and the development of pumping equipment, pump deep pumping oil pumping is being rapidly applied. For example, the depth of deep pumping in Shengli Oilfield and Jiangsu Oilfield has exceeded 2600m, and other fields are also used to varying degrees