Effect of contact geometry and other tribological variables on the friction coefficient in threaded connections

H. J. Carper, A. Ertas, O. Cuvalci

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

Results are presented from an experimental study conducted to determine the effect of contact geometry, material, surface roughness, and thread compound on the friction coefficient in threaded connections. The friction tests were conducted using the friction and galling tester which was developed at Texas Tech University for use in galling research. This tester employs tubular pin and box specimens machined from oil country tubular goods (OCTG) tubing. A third compound is applied to the specimens which are subsequently loaded under sliding motion thus providing an accurate simulation of field conditions. The contact geometry was varied by providing two different test surface designs for the pin specimen, termed crowned and uncrowned. The crowned design results in a higher stress for a given bearing load. Materials tested were L80 and J55, two popular materials used in the field. Two levels of surface roughness were tested, 0.5 micron and 1.5 micron. Three lubricant conditions were tested, two thread compounds and a light coat of oil.

Original languageEnglish
Pages117-122
Number of pages6
StatePublished - 1994
EventProceedings of the Energy-Sources Technology Conference - New Orleans, LA, USA
Duration: Jan 23 1994Jan 26 1994

Conference

ConferenceProceedings of the Energy-Sources Technology Conference
CityNew Orleans, LA, USA
Period01/23/9401/26/94

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