Easy. Accurate. Fast. Safe.

The easy, accurate, fast, and safe way to balance pumping units. Are you spending a lot of money and time balancing pumping units? Do you want to minimize the time and expense required? Do you want to eliminate the field measurement of counterbalance effect? Do you want to eliminate the risk of injury or equipment damage for counterbalance effect measurement (chaining off the unit)? If the answer to any of these questions is yes, then CBALANCE for Windows is the tool you need.

CBALANCE does the following:

• It allows you to get counterbalance data without a field measurement.
• It calculates the counterweight positions required to balance the unit in one step.
• CBALANCE contains a huge database of cranks and counterweights for most common units. Using this information, CBALANCE can quickly and accurately calculate the existing maximum counterbalance moment.
• Also, it calculates where to move the weights (all possible positions combinations) to balance the unit in one step.

CBALANCE versus the Amp Plot

Up to now, pumping unit balancing has been done with the familiar trial and error approach using a amp meter. This method is based on the fact that the current drawn by the motor is proportional to motor torque.

If the peak amps drawn by the motor on the upstroke equals the peak amps drawn on the downstroke, then the unit is considered to be balanced. This method has the following disadvantages that CBALANCE eliminates:

• It is time consuming. To balance the unit you may have to move the weights several times. This may take from 30 minutes to three hours depending on the unit. Also, it depends on the experience of the crew doing the work. The time required to balance the unit may be even longer if you find that you need to add or remove counterweights. By saving only 10 hours of time this program has paid itself out.
• The trial and error approach is inaccurate because in many cases you balance the unit for the wrong fluid level. This occurs because to move the counterweights you must turn the unit off. While the unit is off, the fluid level in the annulus rises.
• The trial and error approach is dangerous. Since you have to move large counterweights several times, you are increasing the risk of injury. This is especially true if you have to remove or add counterweights.

CBALANCE for Windows allows you to figure out exactly what you need to do to balance the unit before you do any unnecessary field work.

Easy to Use, Unique Visual Interface

CBALANCE for Windows has a futuristic visual interface that allows you to run it without ever reading the manual. CBALANCE for Windows displays a picture of the front and back cranks and counterweights. To select or change crank type, you click on the crank. To select a counterweight, you right click on its picture.

To specify weight positions, you can click and "drag" the counterweight to the position you want. As you are moving the counterweights, the existing maximum counterbalance moment value updates dynamically.

Context Sensitive Help

While operating CBALANCE for Windows, help is only one keystroke away. If you have any questions about any of the input fields, simply press the F1 key while in that field. Or, you can get more general help by clicking the help icon on the toolbar. The toolbar provides you with the most common program functions such as opening and saving files, printing, help, etc.

Works with XDIAG, RODDIAG, RODSTAR, and other Wave Equation Computer Programs

For CBALANCE to balance your pumping unit, you must have a maximum counterbalance effect that has been calculated by a wave equation diagnostic or predictive computer program. CBALANCE and Theta other products are designed to pass this information quickly, and effortlessly, between programs.

Using CBALANCE with Diagnostic and Predictive Computer Programs

Modern diagnostic and predictive computer programs, such as XDIAG, RODDIAG and RODSTAR, allow you to enter existing counterbalance data so they can do a torque analysis. This determines whether the pumping unit is balanced, if the gearbox is overloaded, and the counterbalance moment required to balance the unit.

The most common way of getting existing counterbalance data is by recording the counterbalance effect in the field, with a dynamometer system. This field measurement is time consuming and dangerous.

CBALANCE for Windows eliminates the need for a CBE field measurement. You can simply select the cranks and counterweights you have, and their positions. From this information, CBALANCE calculates the existing counterbalance moment that you can enter in your wave equation program to find out if the unit is overloaded or out of balance.

Both diagnostic and predictive programs calculate the maximum counterbalance moment required to balance the unit. Up to now, this information was not easy to use. However, with CBALANCE, you can enter the maximum counterbalance moment you need to balance the unit, and it will tell you where to move the counterweights. CBALANCE for Windows calculates several combinations of counterweight positions that will balance the unit. For example, if you have four weights, it may recommend moving only two, or all four. Also, it advises you whether you need to add or remove counterweights, how close you can get with your existing weights, etc.

Pumping Units Supported

CBALANCE contains crank and counterweight data for the following pumping units:

• American
• Lufkin conventional
• Lufkin Mark II
• Lufkin Reverse Mark
• Lufkin Low Profile
• Darco
• Ampscot
• Legrand

No Per-Run Charges

CBALANCE for Windows is available for a one-time licensing fee. A monthly lease-purchase option is also available.

Outstanding Technical Support

Theta Enterprises is dedicated to your satisfaction. Our technical support includes a monthly newsletter, a support hotline, free upgrades and free "bug" fixes (for the first year) and immediate response to problems or questions. When you have a problem, solving it becomes our highest priority.