SAM™ IWC Injection Well Controller

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Product Overview and Features Technical Specifications

Technical Specifications

Multiple SAM configurations available

• 12VDC @ 0.41 amps nominal (standard)

• 120VAC (with optional power supply)

• Optional keypad/display (Use IPAQ/laptop as terminal interface)

• Optional RS-485 Modbus master. Special support for Control Microsystems 4102 multivariable transmitter and Rosemount 3095FB.

• Optional I/O multiplex board to select between CO2 and H2O meter runs at same wellhead.

Available SAM I/O (with included expansion board)

• 8 12-bit analog inputs (6 inputs dedicated to injection well controller)
  - 0-5VDC, 1-5DC, or 4-20mA
  - 0.8-4VDC, 0.8-3.2VDC (with reduced resolution)
   

• 8 digital inputs/outputs
   

• All digitals are utilized for injection well controller (IWC) application
   

• 1 pulse input
  – Used for turbine meter input
   

• 2 communication ports
  – RS-232 up to 115.2K Baud with configurable parity and stop bits
  – External DB-9 connection for terminal emulation program.
  – Modbus RTU protocol (supports Lufkin “ELAM” extensions)

Measured process variables

• Upstream pressure

• Wellhead pressure

• Casing head pressure

• Differential pressure

• Temperature
  
  Data sources for each process variable:

• Analog input

• Smart transmitter input

• Constant

Actuated valve I/O

• 3-wire solid-state control output — NO RELAYS
  – Motor control logic output user configurable
  – Motor can have independent voltage source—up to 28VDC

IWC control methodology

• Flow rate measurement
  – Measures CO2 or H2O—calculates single meter run
  – Supports turbine meter,wedge meter and orifice plate
  – NIST 14 density calculation (up to 17 components). Calculation —runs in less than one minute.
  – ANSI/API 2530 differential pressure calculation
  – Live process variables are sampled once per second
   

• Injection pressure and rate control
  Control is based on pressure or rate priority and is user selectable. Pressure control has override option to keep rate within limits. Rate control has override option to keep pressure within limits.
  – Dead band/high-low set points (2 set-point methods)
     ▫ High and low dead-band set points
     ▫ Single set point with (
  /) percentage dead-band
  – Separate parameters for CO2 and H2O

Protect your reservoir and productivity with IWC

• Protect your reservoir and productivity with IWC

• Avoid reservoir damage from excessive pressure

• Monitor injection speed to optimize production

• Easily track water/CO2 supply
   

• Quickly identify clogged filters or equipment malfunctions
  – Valve reaction—3 methods
    ▫ Constant step—fixed on and off times
    ▫ Proportional—(Not PID)
    ▫ Continuous

• Pressure and rate alarms are configurable
  – Disabled
  – Control (close valve or freeze control)
  – Dynamic alarm
  – Latched alarm
  – Configurable priority (high, highhigh, low, lowlow)

• Valve limit detection
  – Timeout—user programmable time out
  – Continuous

• Manual valve actuation
  – Front panel control (2 motor valves with expansion card)

• Commissioning mode
  – Initiated on first power up.  Allows user to program unit while flow calculation control is disabled. User may enter commission mode at any time.

Plotting and history

• Up to 3 traces can be plotted on screen; user can select what is shown

• 24-hour injection rate (1440 minute buffer)

• 60-day injection volume

Product Overview and Features >>

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Lufkin Automation is a division of Lufkin Industries.