Determination of friction characteristics of J-55 OCTG connections lubricated with environmentally safe thread compound


ERTAS A., ÇUVALCI O. , CARPER H. J.

TRIBOLOGY TRANSACTIONS, vol.42, no.4, pp.881-887, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 4
  • Publication Date: 1999
  • Doi Number: 10.1080/10402009908982296
  • Title of Journal : TRIBOLOGY TRANSACTIONS
  • Page Numbers: pp.881-887

Abstract

This paper presents the results of an experimental study conducted to determine friction coefficient of J-55 tubing with eight different compounds. Four of the compounds meet the specifications of API Modified, and four were lead-free. The specimens were machined and phosphatized with manganese phosphate. The surface roughness of the specimens was nominally 1.27,micron. Repeated tests, were run at a rotational speed of 1.5 rpm and 5 rpm. In each test the bearing load was increased monotonically to a maximum of 625 kN. Friction coefficient data obtained during the tests are presented and discussed.