System Introduction

With the help of data monitoring system of oil wells, managerial staff can learn about the production status of oil wells at any time without going outside. The data of oil wells is transmitted every two hours. Once the oil well gets problems, the diagram will display exclamatory mark. The maintenance staff rushes to the field in the shortest time to solve the problem. After employing 3G/GPRS drilling data submit system, through the sensor fixed on the rack, managerial staff can learn about the pressure, voltage, steam temperature of each well, guaranteeing the safety operation of oil wells.

System Structure

According to the characteristics of oil wells distribution and the development level of wireless communication technology, the remote monitoring and control system of oil wells introduces CDMA/GPRS or data transceiver communication mode. The system consists of sensor, well head controller SU, CDMA/GPRS Data Transfer Unit (DTU), oil production plant communication equipment, real-time database server, WEB server, monitoring browse terminal, etc. A complete monitoring system of oil field should comprise three parts: local monitoring system of oil field, central acquisition server of information center and local area network (LAN) of plant.

The Principles of Local Monitoring System

The local monitor of oil field consists of data acquisition module, 3G/GPRS communication module, Remote Terminal Unit (RTU), field data acquisition computer and local central server. The transceiver of monitoring center receives the signals from the air delivered by oil field RTU, and then amplifies and demodulates RF signals, restores the signals into data transfer signals and sends them to central industrial control computer to calculate, real-time monitors oil well status. When something appears abnormal, the central Industrial PC sends out commands to the RTU of oil field to stop motor and wait for maintenance. The whole system runs automatically and can be monitored without human interference.

Hardware configuration

Chassis: IPC-8422/6114P7/7270AT
Motherboard: FSC-1841VNA
AMD Sempron/Athlon64/Athlon64 X 2 CPU /1G/250G
Data Acquisition Module: PCI-I32IO 16-way isolation DI and 16-way DO PCI bus cards

System Functions

The sensors for detecting oil well operation mainly includes temperature sensor, pressure sensor, motor current and voltage sensor, the load and displacement of oil pump sensor, transformer. They convert the operating status of oil wells into corresponding voltage or current and deliver them to the RTU of well head. And then it connects to the communication equipment of oil production plant through CDMA/GPRS network or data transfer broadcasting station. Data communication equipment collects the controller data of well head by means of polling method. After being analyzed and processed, the data goes to the real-time database of the oil plant. And different departments of the oil plant can access the real-time database according to their rights by means of C/S or B/S mode.
1) Monitors the operating status of oil well
A) Monitors the power supply voltage of oil pump
B) Monitors the power supply current of oil pump
C) Monitors motor on/off
D) Monitors oil leaking, oil stolen
2) Real-time alarm the fault of oil well
A) Gives alarm in case of over-voltage or under-voltage
B) Gives alarm in case of over-current
C) Gives alarm in case that oil pump aborts
D) Gives alarm in case of oil leaking, oil stolen
3) Monitors data statistic and print
Computer real-time displays power consumption and faults and prints statistic report.
4) Expandability
The system leaves enough expansion interfaces for users to expand more features according to oil well condition and requirements.

System Evaluation

The monitoring system employs configuration software and wireless data transfer broadcasting station. The RTU of system delivers the collected data of operating status of single oil well in wireless way to monitoring center, so as to realize the aim of central monitoring each oil well and reducing labor costs. It obviously shortens the time to

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