Micro-differential pressure metering system

1. Product overview

The precise and in time metering of the product rate for the multiphase flow of the oil well, is significant instructive to supervise the production performance and working condition of the oil well, and to establish the optimize measures of the production.

The multiphase flowmeter is used mostly in the petroleum industry, nowadays may appear a certain amount of additional pressure loss during the measuring process, which will increase the return pressure at the portal of the well. The high return pressure will increase the energy cost and influence the production amount of the oil well.

The online intelligent micro-differential pressure metering system’s advantages are: Lower Pressure Loss, Powerful Function, High Accuracy, Highly Automated.

The online intelligent micro-differential pressure metering system uses the wireless transmit data and software to calculate and analyze, then get the portal temperature, pressure, differential pressure, instantaneous flow rate, period production amount ,total production amount, and average production amount precisely and in time.

2. Product feature

  • It will not raise the portal pressure and influence the production amount of the oil well because of using the micro-differential pressure metering device to restrictive measure the differential pressure.
  • The pressure before and after the restrictor and the differential pressure are in the same measuring system because of using the micro-differential pressure metering device. And it can also avoid the pressure inversion and the zero drift.
  • Considered the influence to the efflux coefficient and expansion factor of the fluid caused by Reynolds Factor, the system does precisely correction computing to the efflux coefficient and expansion factor of the multiphase fluid running through the measuring device. The metering model has a strong physical theory foundation, the serviceable range is limitless.
  • This system considered the influence to the metering of the production rate caused by the different water content ratio and gas-oil ratio. Suitable for metering the production rate of different water content ratio and gas-oil ratio for oil well, and reflect the variation trend of production rate in time.
  • This system can calculate the physical parameters like mixed density of the multiphase fluid more precisely. And modify these physical parameters accurately according to the online temperature and pressure compensation, to get a more accurate production rate computing.
  • The miscalculation ration can be controlled less than 5%, and also can increase the computing accuracy by calibration.

3. Specification

Name

Parameter

Nominal pressure

0.4MPa~40MPa

Measuring accuracy

0.1%FS、0.2%FS、0.5%FS

Range ratio

10∶1;15∶1;20:1

Flow range

3.0~300 m3/d

Output

RS485、4~20mA、ZigBee and etc

Explosion proof grade

ExiaⅡCT4、ExbⅡCT6

Nominal diameter

DN 10mm~DN 300mm

Range of differential pressure

0.2 KPa~2000 KPa

Power supply

(1)DC 24V  (2)AC 220V 50Hz

Ambience  temperature

-30℃~80℃

Medium temperature

0℃~120℃

Ingress protection grade

IP65