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Acoustic Fluid Logger IV with Dynamometer

The dual-use AFL IV with Dynamometer instrument meets the growing demand for affordable, multi-tasking measurement devices. This instrument can give the operator a quick overview of both pumping unit efficiency and fluid level status. Saved data reports can build a comparative record which can reveal changes in well conditions over time.  Sage DYN dynamometer test

Testing with the AFL IV with Dynamometer delivers a complete physical exam of the pumping unit at the well site. The AFL IV with Dynamometer and its components gather surface and downhole pump cards, standing and traveling valve tests, motor current readings and counterbalance measurements, as well as fluid level, pump intake pressure and bottomhole pressure and a host of other readings.

Because so many operators are currently using computers in the field, the AFL IV with Dynamometer was designed for use with an operator's existing field computer. This eliminates the need to bind a captive computer into the testing instrument, and also reduces cost to the customer. Sage AFL software accomplishes the fluid level work, and Sage DYN software works with the dynamometer portion. Software installs easily on any Windows computer, and can be installed on multiple office and field computers at no extra charge.

 Sage AFL and Sage DYN software are fully compatible with Windows 10 -- and also Win 8, Win 7, XP and Vista.

Dynamometer report page from Sage TechnologiesThe Sage DYN software offers easy to use tabs such as the Summary Page, shown above left,  left, which displays the Downhole Card, Surface Card, Motor Current or Amp Plot, and Standing and Traveling Valve Checks. These graphs can be compiled into comprehensive Dynamometer reports. One example of the report pages is shown at left.

First in the dynamometer process is data gathering. Sage Technologies offers only top notch transducers for use with the AFL IV with Dynamometer, so the components are easy to use and extremely durable. An operator may choose any or all of these dynamometer components, depending on needs. While they are explained briefly here, for more in depth information, click this Transducers link.

To measure the load during the pump cycle, some operators prefer the accuracy of the 40 K Quantitative Horseshoe Load Cell, which is inserted into a space, created by the hydraulic lift kit, between the carrier bar and the rod clamp, as shown below right.

Other operators prefer the Quick-Clamp Load Cell, shown in use below left, which also measures the pump cycle load, but which does so by clamping directly to the rod string below the carrier bar. Having these choices allows an operator flexibility of both budget and process, while maintaining the accuracy that customers have come to expect from Sage Technologies.

Quick Clamp Load Cell Transducer in useAnother Dynamometer component, the Horseshoe Load Cell and String Transducer  in useSage String Transducer measures movement of the rod string by connecting to the carrier bar and recording the stroke of the pumping unit during the pump cycle, to determine the position of the rod string during a dynamometer test. And the Sage Current Clamp measures the motor current of the pumping unit throughout the pump cycle, on both the upstroke and downstroke. With this information, the Sage DYN software creates an amp plot, which shows motor current vs. rod position over time. This data can be used to balance the pumping unit, or to calculate power usage on the well.

An AFL IV with Dynamometer test combines many inputs of data to make an analysis of the pumping unit. While the load cell is recording the load during the pump cycle, the string  transducer is simultaneously recording the stroke. The Sage DYN software combines the the load and stroke data points, and plots them graphically together during a complete pump cycle to create a surface dynamometer card. Stroke is the horizontal axis on the surface card graph, and load is the vertical axis, as shown on the screen shot below.

Dynamometer card, well with fluid pound Because dynamometer testing collects a wealth of field data, Sage DYN software gives you many ways to use this information.

Downhole dynamometer cards are made possible by entering the known rod string data from the well onto the Sage DYN screen. The resulting downhole dynamometer card represents the calculated load weight and travel distance of the pump downhole.

How do you read a downhole dynamometer card? Each card forms an easily recognized shape trace, shown in the chart below, which are standard in dynamometry testing and diagnosis. For example, the dynamometer card shown above reveals Fluid Pound, when compared to the shape traces below. Click here to  see more on Sage DYN  software, or go to Software on the top menu and scroll down to Sage DYN screens.

Dynamometer downhole card examples

Sage Dynamometer downhole card examples

For an illustration of an example of a Dynamometer card diagnosis of a pumping unit, using actual data, see Example Two: AFL IV with Dynamometer - Worn Plunger and Worn Traveling Valve on the Downloads tab.

The Sage DYN software also gives you the capability to overlay downhole dynamometer cards collected on the same well over time, which offers you a chance to quickly identify changes in the well. Shown below is an example of card overlay, which uses a different color for each dynamometer card collected over time.

Overlay of Dynamometer cards over time

Above, see the example of Fluid Pound, with overlaid cards collected over time exhibited in various colors.

The AFL IV with Dynamometer allows not only comprehensive analysis of the pumping unit, but also, because it is a DUAL USE instrument, ALL fluid level gathering and analysis functions of the Acoustic Fluid Logger IV are also available in this one system. Fluid level gathering is made possible with the Pressure Pulse Gas Gun and Sage AFL Software.

Fluid Level Examples:

For more on the fluid level portion of the instrument, see the Acoustic Fluid Logger IV  product page. To see a recorded fluid level and analysis using actual well data see Example One: High Fluid Level on the Downloads tab.

While the internal electronics and connections for both functions are contained in the single instrument box, some customers prefer to design their initial system to function as either a Dynamometer, or as a Fluid Logger, and then to purchase the other set of peripheral accessories in the future.


Compressed gas (CO²) for the bottle can be found from industrial gas suppliers. Simply look for a local oilfield, industrial, medical or beverage gas supplier. The 2.5 lb. bottle should be weighed empty, then filled with 2.5 lbs. of compressed gas.

See the Supplies tab for more parts and accessories for the Acoustic Fluid Logger IV with Dynamometer.


Click for a .pdf of the manual: AFL IV with Dynamometer Manual Version

Click for a .pdf of the brochure: AFL IV with Dynamometer Brochure

Click for a .pdf of the Transducer choices available with the AFL IV with Dynamometer

Click for a .pdf of the fluid level manual: Acoustic Fluid Logger IV Manual


AFL IV with Dynamometer system components:Sage Dynamometer front panel