Screen Inverter Complete
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 Compaq Presario 2100 Complete LCD Screen Inverter Bezel Cover Cable Hinges 15  US $15.99
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Mechanical and electrical products in over the course of oil production in oil fields complete system control engineering advantage
1 Introduction To compensate for the oil fields in the production process of formation pressure decay, need to use water injection to maintain reservoir pressure for oil operations. High and low pressure water injection is to determine the reasonable development of oil field pipe and equipment and ground state of the important parameters. As the injection process and the design of mechanical and electrical equipment configuration needs to adapt to complex and diverse process conditions, so water injection process design and mechanical and electrical equipment allocation project margin. These conditions include: an increase in the late development of injection wells; oil reservoir pressure and oil and gas and water distribution is changing; switches increase or decrease the number of wells; wash well, and the impact of inadequate water supply and so on. Conditions of uncertainty caused by injection pressure fluctuations, water injection uneven instability, injection pressure difficult to control, to bring oil production high and stable yield and management difficulties. As the oil field water requirements difficult to accurately predict and control, taking into account the needs of oil field development, equipment margin requirements are usually designed in accordance with the maximum possible oil fields in the water injection system design is particularly prominent. Oilfield water injection equipment with pump Motor Drag, high-power systems often run on a large horse-drawn trolley in the light-load low-efficiency state. Exit gate by water injection pressure manual control pump, that is by changing the pipe network to adjust the pump characteristic curve of displacement, pumps, motors match difficult to achieve in the best situation the pump is running, pipe network and low efficiency, energy losses up to 50% .
Constant Pressure technology can be very effective water injection process and the stability of a large margin for a significant reduction in pump engineering Fan power consumption. Frequency Constant Pressure Water Injection station automatic control system of the proposed technology is full use of existing production facilities, water injection equipment, motor speed is regulated to regulator, steady stream for water injection. At the same time soft soft stop function from the start instead of vacuum, so that a smooth motor starting, stopping, reducing the impact of power and mechanical equipment will not cause pipeline pressure, flow, velocity dramatic changes, no valve closure, thus preventing cavitation, water hammer, surge is extremely beneficial to extend the pipeline network, pump, valve maintenance and service life cycle. Complete and perfect control system, build demand information platform, an increase in treatment effect, strengthen supervision and management mechanism to minimize the labor intensity of staff positions to improve enterprise information management, has a very large economic and social benefits.
2 system component and function design
Control system structure shown in Figure 1. System is divided into two levels, namely, the field level and control level, through HMI (HMI) display and control to achieve process.
Core automation system used Delta products. Control level is the key system functions, its main function is to HMI (human machine interface) and field-level hub between the layers. HMI accepted set of parameters or commands to control the production process of the injection, while on-site state transport to HMI. Control in part by the Delta PLC With touch screen integration. Including the DVP-32EH00R (CPU unit), DVP-04AD-H (analog input module), analog DVP-04DA-H (output module), DOP-A80THTD (touch screen) composition. Control equipment installed in the control room level control cabinet. Delta PLC The CPU module DVP-32EH00R its with a RS232 and a RS485 communication interface, DOP-A80THTD touch screen with an RS232 interface and a USB Interface. Touch screen controller through RS232 serial communication.
The field level is the basis of system functions. The field level by the pressure transmitter and integrated intelligent Inverter Composition. Use of integrated intelligent pressure transmitter Honeywell pressure transmitter, Inverter Delta VFD Series Frequency Selection. Injection site Motor 1 set 160kW, 2 sets 75kW (reserve a table), the inverter used 160KWVFD-1600F43A a composition with 75KWVFD-750F43A were delayed and delayed for a second program, see Figure 2. PLC control units using a drag 2 sets 2 sets of water injection motor inverter variable frequency cross-pressure water injection. Field-level control using shielded cable, smart pressure transmitter will be integrated pressure signal is converted to 4-20mA signal input to the analog input module DVP-04AD-H, control output volume control by PLC analog output module DVP- 04AD-H is converted to 4-20mA signal input 2 inverters, 2 sets of water injection to achieve the motor inverter control constant pressure water injection.
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