Tests pinpoint sucker-rod failures

While pumping an oil well, sucker rods are subjected to cyclic loading. Therefore, they can fail by fatigue or corrosion fatigue that originates from localized corrosion such as pitting on the rod surface. The principal cause of sucker-rod failure is overstressing. Fatigue failure is affected by the...

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Bibliographic Details
Published inThe Oil & gas journal Vol. 95; no. 21; p. 59
Main Authors Elshawesh, F, Elhoud, A, Elagdel, E
Format Magazine Article
LanguageEnglish
Published Nashville Endeavor Business Media 26.05.1997
Subjects
Carbon
Carbon dioxide
Carbon steel
Corrosion
Corrosion resistance
Crack initiation
Crack propagation
Drilling
Ductility
Failure
Failure analysis
Handbooks
Materials fatigue
Materials science
Metal fatigue
Oil wells
Oilfield equipment & services
Peak load
Petroleum industry
Quality control
Research centers
Stress concentration
Studies
Technology
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Summary:While pumping an oil well, sucker rods are subjected to cyclic loading. Therefore, they can fail by fatigue or corrosion fatigue that originates from localized corrosion such as pitting on the rod surface. The principal cause of sucker-rod failure is overstressing. Fatigue failure is affected by the maximum stress, range of stresses and the number of reversals or cycles. For sucker rods, these factors are represented by peak polished-rod load, range of loading of speed. Tests were conducted to pin-point the failure of sucker rods.
Bibliography:content type line 24
ObjectType-Feature-1
SourceType-Magazines-1
ISSN:0030-1388
1944-9151