There was a download of RODDIAG 3.3 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software is a product of Theta Oilfield Services, Inc.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. RDIAG.exe is the most common filename for this program's installer. The most popular versions of the program are 3.3 and 3.1. The software relates to Education Tools.
From the developer:
RODDIAG for Windows is a wave equation diagnostic computer program. RODDIAG uses exact pumping unit kinematics to analyze any available pumping unit geometry. RODDIAG interactively calculates fluid level, pump intake pressure, and net pump displacement from the downhole pump card shape.
You may want to check out more software, such as Maxima and Minima, IUCLID5 or ECoord, which might be related to RODDIAG.