Norman W. Hein, Jr., P.E.
NPS - Norris/AOT Scott Malone NPS - Norris/AOT
Sucker rod connection failures seem to be a problem to some operators, while others do not seem to have the same problems. The connection should be the strongest link in the sucker rod string while the rod body should see more failures. There are three main classifications for the connection failures. These are: manufacturing discontinuities or defects, mechanical damage (including handling and make-up procedures), and loss of displacement (LOD). This paper will: discuss the API industry connection, discuss the three failure classification areas, and provide many
example pictures of the failure causes Additionally, recommendations will be provided on how to prevent future connection failures.