Gas Optimization with or without PLUNGER INSTALLED

Optimization With or Without PLUNGER INSTALLED.

A plunger-lift optimization system is a low-cost, efficient method of increasing and optimizing production in Oil and gas wells, which have developed marginal flow characteristics.

Without a Plunger on the Well the Fisher ROC Optimization program may still be used to optimize production. See mode 2 below (Critical Flow vs. Time Off).
The basics of the plunger is to open and close the well shutoff valve at the optimum times, to bring up the plunger and the contaminants and maximize Natural Gas production. A well without a deliquification technique will stop flowing or slow down and become a non-productive well, long before a properly deliquified well. The plunger lift has low energy cost, low environmental impact, low capitol investment and low maintenance cost. Fisher ROC RTU's can be used as controllers to offer a variety of criteria to control the plunger and view thye resulting well characteristics. The original controllers were just timers, with fixed open and close cycles.
Measuring the various pressures in the system allows intelligent and reactive control. The pressures often measured are Casing, tubing, line, and differential (DP). The other items measured are plunger arrival times, plunger velocity, flow rates, temperatures and status of various auxiliary equipment: oil tank level, compressor status.
Plunger travel is normally provided by formation gas stored in the casing Annulus during a shut-in period. As the well is opened and the tubing pressure allowed to decrease, the stored casing gas moves around the end of the tubing and pushes the plunger to the surface.

Outlaw Optimization for Fisher ROC's also includes ESD features, called PPESD or Pipeline Pressure Shut Down, that is designed to protect the pipeline and work with the Optimization program in the ROC.

Download Links: or send a message for More Info to More Info

Installation and User Manual

FLO BOSS 103 V6.0.bin

ROC 107 PPSD_ESD_FB107_V6.0.bin

ROC300 FLASH PAC_OPT_PPSD_ESD V6.0.H00 (Ctrl Right click to download)

ROC300_PPSD_ESD_ROC300_ROCPAC_V6.0.H00 (Ctrl Right click to download)

FLO BOSS 407 V6.0.bin

OPT Ver6_Display_File.dsp

Mode 2 (Critical Flow vs. Time Off)

Basic On / Off control with no requirement for additional inputs (Casing pressure or Plunger sensor). Use of Critical Flow allows the on time to vary according to the well's ability to produce gas. This mode provides automatic On/Off control based on a critical flow set point and a fixed time off period. The amount of time that the valve will be open will vary depending on the characteristics of the well. Plunger is optional with this mode. The cycle is started in the on or off time according to the Start Position. The Minimum On Time Before Critical Flow Timer (MOTBCF Timer) will begin counting down at the start of the on cycle. The purpose of this timer is to permit flow for a minimum period of time before checking flow rate, and if a plunger is installed, to allow enough time for the plunger to arrive. Once the MOTBCF Timer has expired, the critical flow set point determines how long the well will stay open.


If the gas flow rate drops below the critical flow set point the Critical Flow Bypass timer will begin counting down. The control valve will remain open during this time. If the gas flow rate rises above the critical flow set point before the Critical Flow Bypass timer expires, the timer will reset and the valve will remain open. If the bypass timer expires, the valve will close and the program will go into the Time Off cycle.

For liquid unloading situations ensure that the Critical Flow Bypass Timer is not set too short to avoid switching to the Time Off Cycle prematurely.

A fixed value may be entered for the critical flow set point, or the user may enable the critical flow calculation based on Gray's Equation. (As pictured at Left)


Ideally the pressure used is from a Wellhead-mounted tubing pressure transmitter, although the meter run static pressure may also be used.

Values for the water fraction and tubing size must be entered before the calculation is enabled.

* Once setpoints have been entered type a 1 in Start/Stop on the User Display screen and click Apply.
* The most recent 10 plunger velocity and arrival time stamp are available on User Display if plunger sensor is installed.
* Changing timer setpoints when the timer is counting will have no effect until the next cycle.
* To force setpoint changes to take effect immediately Stop and then Start the mode.
* A critical flow set point change will take effect immediately.

The minimum required configuration on the User Display screen:

* STEP 1 - Confirm all System Input /Output Parameters has been probably setup or initialized.
* If using program internal calculated critical flow, SELECT "Cr.Flow Override Disabled".
* If using manual critical flow setpoint, SELECT "Cr.Flow Override Enabled", also ENTER a Cr.Flow Override Value.
* Values for the Tubing Diameter and Water Fraction must be entered if the
Continuous Critical Flow calculation is to be used.
* STEP 2 - Confirm Time On, Time On Bypass and Time Off setpoint value has been entered correctly.
* STEP 3 - If plunger sensor is installed, all plunger parameter set points MUST be initialized or corrected.
* STEP 4 - Confirm program is currently on Mode 2.
* STEP 5 - Select START and click Apply button to start optimization program as.

For a FREE 24 bench evaluation, please go to Outlaw
visit More Info to inform us of your situation, and we will attempt to provide a solution for you.

For more information or a demo on an interface HMI to the Fisher ROC Optimization is required Please visit the http://www.icscada.ca/
Icscada is a networked Internet ready HMI with modbus and ROC protocols ready to go. A fully running demo is available at Outlaw WebDemo

See a Live demo today at Icscada Website

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