The United States schlumberger company successfully developed a new type of oil and gas DianQianBeng mixed pumping. It is a DianQianBeng installed in the heterogeneous axial flow pump, can allow 75% of the free air into the pump, it is suitable for underwater oil Wells and under seal well.

       The axial pump advance into the main mining pump, liquid flow first enter it, and be compressed. Laboratory and field use all show that it can be in the air content of 75% high gas oil well successful application, greatly more than conventional pump gas content 40% ~ 45% of the limit. The first of this kind of oilfield equipment has been used for rice Mohr company oilfield oil Wells. The well water by alternating injection to improve recovery efficiency, resulting in frequent produced gas volume change sharply. Earlier the downhole gas anchor is can barely production, but its oil production for high gas content and ? dramatically