Paper: Downhole Dynamometer Tool

The Downhole Dynamometer is a tool designed primarily for the acquisition of sucker-rod load and position data at any point in the rod string. The tool is completely sealed, battery-operated, and microprocessor-controlled to sample the various parameters at specific times and sampling rates and to store the data digitally in a nonvolatile memory for later retrieval. Other parameters sampled are temperature and pressure and, with the present design, bending data is also collected. Axial position is derived from acceleration. At the time of this presentation two-dimensional lateral accelerations may also be available. While used predominantly for code validation the tool could be an effective well-diagnostic device as well.