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Successful Application of PCM Large Displacement Screw Pump in China Oilfield
At present, China is the second largest oil consumer and the seventh largest oil producer in the world. To reduce production costs and maximize shareholders' interests, PetroChina, Sinopec and CNOOC, the three largest oil and gas production conglomerates in China, are looking for ways to reduce their costs. France PCM pump North Asia Manager Ma Jian and technical director Wu Bingchang told Daqing Oilfield using large-displacement displacement pump PCM details. Figure 1: On-site PCM Screw Pump China started to develop screw pump technology as early as the 1980s, but it was not until 2000 that the screw pump was gradually applied in major fields. The purpose of the application of screw pump â—† promote the use of screw pump oil production technology to reduce production costs, especially to reduce electricity costs (according to the statistics of PetroChina, electricity costs have accounted for 46% of the cost of oil production). â—† solve the heavy oil cold mining, high sand, high gas wells encountered in the mining process problems. Domestic screw pump in China's oil field problems â—† sucker rod fracture and tripping. This is mainly due to the imperfect design and selection of screw pumps and the lack of efficient braking devices. â—† Displacement is small and pump efficiency is low. This is mainly due to the poor quality of the stator and the corresponding smaller number of types of rotors. â—† Check the pump cycle is unstable, the performance of the screw pump pump cycle from a few weeks to 2 to 3 years. This is mainly due to the fact that for different oil wells, the formulation of stator rubber is single, and the stator and rotor interference ratio is not reasonable. Figure 2: 600TP600 screw pump production curve PCM Company 600TP600 screw pump application in Daqing Oilfield Company produced 600TP600 screw pump in December 2003 in Daqing Oilfield put into use, which is the first application of Daqing Oilfield of foreign manufacturers of screw Pumping (see Figure 1). The purpose of the application of the screw pump is to replace the large displacement pump rod pump, thereby reducing the cost of production wells. Oil Well Data and Screw Pump Parameters Based on the oil well data of Daqing Oilfield and optimized by PCM WINPETRO screw pump software, Daqing Oilfield finally selected the 600TP600 screw pump (speed 500 rpm, outlet pressure 0 The daily displacement of 600 cubic meters / day, the maximum lift of the pump is 600 meters); In the meantime, in order to reduce the one-time investment, PCM company matched with domestic drive head and domestic motor with 22 kw power. Figure 3: Application of PCM 600TP600 in Venezuela Screw Pump Trial Operation In December 2003, the displacement of the screw pump was 130 m3 / d and the pump efficiency was 55% at the initial stage after the pump was put into production. Customers think this low pump efficiency is due to the quality of the screw pump. Stator Suitability Test In order to test the suitability of the 159 nitrile rubber stator of our choice, we took 500 ml of the oil in the well and sent it to France to conduct the adaptability test of the 159 nitrile rubber stator. PCM, a French company, has tested the suitability of oil samples and stators in its stator rubber laboratory. After two weeks, the test results were: â–³ Coefficient of Expansion = + 2.2% â–³ Hardness = -4 point shore This test result shows that PCM Company's 159 nitrile rubber stator has good adaptability to this well. PCM Oilfield experts advise the screw pump to continue production for a period of time to allow the stator rubber to reach its final swollen form factor. & nb