Coal bed methane RTU
Automation and Electronics' Coal Bed Methane RTU (CBMR) is designed to monitor and control the production of a Coal Bed Methane Well, and measure the gas and water production of the well.
This RTU is designed around the SCADAPack LP® controller running RealFLO® Gas Flow software, and is packaged with a Control Microsystems Model 4102 Multi-variable Gas Flow Meter, and a Cutler Hammer Variable Frequency Drive. Automation & Electronics has combined the latest Commercial-Off-The-Shelf (COTS) hardware from vendors with years of oilfield experience to provide the customer with a reliable, easily serviceable CBM RTU.
The SCADAPack LP communicates to the VFD and 4102 flow meter via RS-485 high speed serial communication, to gather gas flow data, and monitor and control the VFD. Water production is measured with a standard Turbine Meter, and fed to the RTU for totalization.
Radio communication to a central host computer is typically via a 900 MHz Spread Spectrum Radio network. Any RS-232 data radio can be integrated into this RTU. The unit is powered by an industrially rated 110 VAC / 12 VDC battery backed power supply.
Features
Hardware
- Low power SCADAPack LP controller
- Local operator interface
- Electronic submersible or progressive cavity control
- Fluid level sensor inputs
- Automatic restart
- Battery backed power supply
Shutdowns
- High/Low torque
- Low speed
- High/Low motor current
- High/Low DC bus voltage
- High casing pressure
- Low fluid level
- Loss of VFD to SCADAPack LP communication
- Loss of phase
Displayed Values
- Speed
- Torque
- Motor current
- Fluid Level (requires level sensors)
- Specific gravity (requires two level sensors)
- RealFlo calculated values and MVT read values
- Static (Casing) pressure
- Differential pressure
- Gas temperature
- Instantaneous gas flow
- Past day gas flow
- RealFlo running status and version number
- Current water flow rate
- Past day water flow
- Last, 2nd last, and 3rd last fault
- Current drive/alarm status
- Current RTU time
Alarms w/User Controlled Set Points and Timers
- High/Low torque
- Low speed
- High/Low motor current
- High/Low DC bus voltage
- High casing pressure
- Low fluid level
Automatic Restarts
- Low torque
- Low speed
- High/Low motor current
- High/Low DC bus voltage
- High casing pressure restarts when low casing pressure is reached
- Low fluid level restarts when fluid is above low fluid set point
- Loss of VFD to SCADAPack LP communication
- Loss of phase restarts when power is good
Displayed User Control Parameters
- Alarms set points and timers
- Manual and automatic control set points
- Automatic PID tuning control
- Shieve ratio
- Turbine meter (pulses per gallon)
- Alarm and drive reset
- User initiated shutdown
- Optional level sensor parameters
- Electronic submersible or progressive cavity control
Specifications
Mechanical | |
---|---|
Housing: | 18" x 16" x 8" NEMA 4X Enclosure |
Environmental | |
Operating temperature: | -40 to 158 deg. F (-40 to 70 deg. C) |
Relative humidity: | 5 to 90% non-condensing |
Other information | |
Power supply: | 110 VAC / 12 VDC battery backed supply |
Processor: | SCADAPack LP |