辗辊式井下采油筛管的研制及应用

Development and application of roller-type downhole production screen pipe

针对油田在用井下采油筛管防砂过程中出现的砂堵等问题,依据能量转换原理,研制出一种辗辊式井下采油筛管。辗辊式筛管利用井下流体动能,通过机械传动装置,驱动辗辊转动,调整转动的辗辊间的间隙,既达到了防砂、过滤的目的,又避免了砂堵的发生。检测和现场应用表明,辗辊式筛管既防砂又不发生砂堵,还具有穿透性好和节能效果明显等特点,不仅可用于一般的采油井、含砂量大和压裂的井,还可用于污水泵的保护。

For the sand plug existing in the downhole production screen pipe currently used in oilfield, a kind of roller-type downhole production screen pipe is developed in accordance with energy conversion principle. By means of the mechanical drive mechanism, the new screen pipe uses the kinetic energy of downhole fluid to drive the roller run and adjust the clearance among the running rollers so as to perform sand prevention and filtering as well as preventing sand plug. The detection and field application indicate that the roller-type screen pipe can not only prevent sand, but also prevent sand plugging. Moreover, it features good penetration and obvious energy- saving effect. It can be used in the ordinary oil production wells and the wells with large volume of sand and the fractured wells; in addition, it is can be used for protecting sewage pump.