Single-screw Pump Multiphase Oil and Gas Transmission and Process Analysis (2)

Into the liquid rate Into the liquid rate is the medium into the pump, the liquid phase of the composition of the amount of traffic accounted for the percentage, here refers to the volume ratio. With the concept of liquid rate, no matter what the ratio of oil to gas, the amount of water contained in the liquid, how much gas is compressed, regardless of the amount of solid particles in the medium, with the liquid rate basically reflects the pump operation situation. According to the preliminary analysis of the test and the operation data of the oilfield, the liquid inlet rate is not less than 5%, and the single screw pump can work normally. 5% of the liquid will be the relative movement of the rotor and stator friction heat generated away, but also on the rotor and stator meshing surface play a role in lubrication, to ensure the normal operation of the screw pump. Mixed transportation design should pay attention to the problem Continuous supply of liquid media in the production of oil wells in the production of unstable state of the gas may be high for some time, while the liquid content is high for another period of time, so the use of Single-screw pump to do oil and gas mixed transport, in order to prevent the pump in the delivery of liquid and gas, mixed liquid process, a period of liquid flow, resulting in stator heat due to friction so that the stator rubber temperature, rubber aging, reduce The service life of the stator, the medium into the single-screw pump cavity try to use the uniform mixing of liquid and gas in the crude oil to ensure continuous supply of liquid medium to the pump. A, at the same time open the oil field block in the multi-well, oil and gas wells complement each other, so that into the single-screw pump medium as uniform as possible. B, before the pump pipeline buffer tank added, in the buffer tank to store a certain amount of crude oil, and a set of current limiting device to the mixed pump to supply a certain amount of crude oil. This no matter how well the gas content changes, can ensure the minimum rate of liquid, so that mixed pump to work properly. In the oil pipeline additional flow limiting device, the flow should be mixed pump flow 1/20 quantitative pump, with a single screw pump effect will be better, the use of time should also control the start and stop. C, after the pump line back to the oil tank, the tank with a current limiting device part of the liquid back to the mixed pump inlet to ensure that the pump into the oil and gas rate, the hybrid pump to work properly. Flow control device can throttle flow control, single screw pump can also be used to control the flow. The program due to the return part of the liquid, will reduce system efficiency. When the delivery flow is large, the use of multiple pumps in parallel delivery, we must pay attention to the symmetrical arrangement of the suction pipe to ensure that the medium into the single screw pump as evenly distributed to prevent bias current.