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SPE 37500
Society of Petroleum Engineers
Development of the Downhole Dynamometer Database
John R. Waggoner, SPE, and A.J. Mansure, SPE, Sandia National LaboratoriesCopyright 1997, Society of Petroleum Engineers, Inc.
This paper was prepared for presentation at the 1997 SPE Production Operations
Symposium, held in Oklahoma City, Oklahoma, 9-11 March 1997.
This paper was selected for presentation by an SPE Program Committee following review of
information contained in an abstract submitted by the authorss. Contents of the paper, as
presented, have not been reviewed by the Society of Petroleum Engineers and are subject to
correction by the author(s). The material, as presented, does not necessarily reflect any
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Abstract
The Downhole Dynamometer Database is a compilation of
test data collected with a set of five downhole tools built by
Albert Engineering under contract to Sandia National
Laboratories. The downhole dynamometer tools are memory
tools deployed in the sucker rod string with sensors to
measure pressure, temperature, load, and acceleration. The
acceleration data is processed to yield position, so that a load
vs. position dynagraph can be generated using data collected
downhole. With five tools in the hole at one time, all
measured data and computed dynagraphs from five different
positions in the rod string are available.
The purpose of the Database is to provide industry with a
complete and high quality measurement of downhole sucker
rod pumping dynamics. To facilitate use of the database,
Sandia has developed a Microsoft Windows-based interface
that functions as a visualizer and browser to the more than 40
MBytes of data. The interface also includes a data export
feature to allow users to extract data from the database for use
in their own programs.
This paper includes a description of the downhole
dynamometer tools, data collection program, database
content, and a few illustrations of the data contained in the
downhole dynamometer database.
Introduction
The Downhole Dynamometer Database (DDDB) is a
compilation of test data collected by Sandia National
Laboratories (SNL) using downhole dynamometer tools built
by Albert Engineering (AE). The purpose of the DDDB is to
provide industry with a complete and high quality
nrSTPRI ! OF rlT' DOCUMENT IS UNLMITEmeasurement of downhole sucker rod pumping dynamics. To
facilitate use of the DDDB, Sandia developed a Microsoft
Windows-based interface that functions as a visualizer and
browser to the more than 40 MBytes of data. The interface
also includes a data export feature to allow users to extract
data from the database for use in their own programs.
Database Interface
The DDDB Interface program, DownDyn, is a Microsoft
Visual Basic version 3.0 program designed to run on a
Microsoft Windows version 3.11 platform. Figure 1 shows
DownDyn's main screen. The program includes graphing
utilities necessary to generate and display plots. Instructions
for installation and how to import user data for viewing, or
add user data to the database, are contained in a readme.txt
file. Other help information is contained in the help facility
built into the program.
The program has been beta tested by over 15 industry
experts for six months, resulting in a number of
improvements that have been incorporated into the program.
Current information about the status of the database and
interface can be found at http://www.sandia.gov/apt/.
The DDDB Interface performs four functions: selecting a
data file, choosing information from the file, plotting, and
importing/exporting information.
Selecting a Data File. Data files are selected by scrolling
through lists of the wells in the database and of the tests
performed on each well. The list of tests comes from the tool
program schedule shown, for example, in Fig. 2.
Choosing Information from the File. If the data file chosen
is for a surface dynamometer test, there is no information that
must be selected before plotting, Fig. 3. If the data file
chosen is a downhole test, there are a number of choices to be
made before plotting. First the Plot Type must be chosen to
be a time dependent plot showing selected Plot Variables
verses time, Fig 4, or a dynagraph showing load or velocity
versus position, Fig. 5. Since the data files contain a number
of cycles the Plot Window containing the interval of data to
be examined must be chosen
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Waggoner, J. R. & Mansure, A. Development of the downhole dynamometer database, article, February 1, 1997; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc677984/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.