Overview

Automation & Electronics' CBMR -Coal Bed Methane RTU 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 Multivariable 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 V_AC / 12 V_DC battery backed power supply.

Features

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
Loss of VFD to SCADAPack LP communication
Loss of phase
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
Loss of VFD to SCADAPack LP communication
Loss of phase restarts when power is good
Low fluid level restarts when fluid is above low fluid setpoint

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

Display Features

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Displayed Values

Speed
Torque
Motor current
Fluid Level (requires level sensors)
Specific gravity (requires two level sensors)
RealFlo calculated values and MVT read values

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Static (Casing) pressure
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Differential pressure
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Gas temperature
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Instantaneous gas flow
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Past day gas flow
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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

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User control parameters

Alarms set points and timers
Manual and automatic control set points
Automatic PID tuning control
Sheive ratio
Turbine meter (pulses per gallon)
Alarm and drive reset
User initiated shutdown
Optional level sensor parameters
Electronic submersible or progressive cavity control