The downhole oil water separation system is comprised of double fluid flow pump, cyclone separator and oil pump.

井下油水分离系统由双液流泵、旋流分离器和原油提升泵三大部分组成。

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Double patch nail using adjustable of high-strength stopper resilient structure can effectively stop hanging wheel or separation from the stopper. Strong crash resistance and better durability.

板式和夹式双重挂片，限位器采用可调式高强度弹性限位结构，能有效地实现吊轮限位器与吊轮主体间的结合与分离，防撞力大，耐用性更好。

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The qualitative analysis of N polyaromatics in heavy oil was made by a double adsorption separation followed by the application of low voltage ionization and high resolution MS direct sampling.

通过两次吸附分离，然后采用低压电离，高分辨质谱直接进样技术对重馏份油中的含氮多环芳烃进行定性测定。

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