| Currently, the separate injection technology of oil injection wells using wire and cable test modification, but cannot avoid the risk of fishing eccentric injector.Only by monitoring the instantaneous injection rate can realize real-time monitoring and control. The flow characteristic of CNC faucets is one of the cores to achieve automatic control technology of the injection flow, which can automatically adjusted according to the changes of downhole flow so that the efficiency test modification can be greatly improved to achieve real-time test modification.About the u-shaped CNC faucets,using the finite element numerical method to calculate the nozzle flow coefficient under different opening.The results showed that the nozzle flow coefficient varies with the opening and under the condition of the same opening, flow coefficient increases with the increase of nozzle pressure, and gradually become stable.Experiments test the flux when the nozzle opening is25%, and theoretical calculation results of the relative error is less than5%.The author did some further works on the analysis of orifice flowmeter as well as miniaturization design in order to determine the relevant parameters of the miniaturized orifice flowmeter, verify consistency of miniaturized and standard orifice flowmeter by computer simulation and pressure experiment.In this essay, the author design the mechanical structure of intelligent water distributor, making intensity distribution on it by using CSSW in order to meet the design requirements. The design of CNC faucets is the core of the thesis. In order to reduce fluid pressure on the valve cartridge, we adopt pressure-balanced design so that the driving force of the engine can be used only to overcome actuator to achieve frictional force generated by motive seal. Finally, the experiments on CNC faucets showed that the thrust of CNC faucets is large enough to achieve automatic switching operation which meets the design requirements. |
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