OIL PRODUCING TECHONOLOGY ADJUSTMENT FOR THE OIL-BASE POWER LIQUID OPEN SYSTEM HYDRAULIC PISTON PUMP AT LATTER DEVELOPMENT STAGE

Aimed at the problems such as the increase of the power liquid treatment amount, the insufficiency of the system’s capacity, the difficulty of the aged oil treatment,the ambiguity of the underground reservoir performance monitoring and so on resulted from the uprising of the water cut, the fine delineation of the series of strata and the increase of the well numbers which occurred at the latter development stage of Erlian oilfield with the hydraulic pump production mode, under the condition of not considering water-base power liquid and close system, tested and studied many technologies of converting oil producing mode in hydraulic pump wells in the mature area. Maximally utilized the existing technology process, implemented the techniques such as hydraulic jet entering into the system in the well pumping unit well, admixing water with dual tube, hydraulic jet entering into the system in the screw pump well and so on, overcame the above problems gradually, and provided reliable technical means for the high efficient development of the oilfield.