Evaluation of pulling rope wear and coefficient of friction for pipe-type cables

The coefficient of friction between the pulling rope and cable pipe for a high-pressure fluid-filled cable was determined in order to characterize the effects of pulling tension and sidewall pressure on this parameter. Pipe wear was also measured. The study found that variations in pulling tension were more strongly affected by pulling rope wear than pipe wear. The coefficient of friction of the pulling rope varied from 0.27 to 0.75. Pipe wear of 1.52" (60 mils) was measured during 430m (1425 ft.) of pulls at 1414 kgfh (950 1bsJft.) sidewall pressure and 1.02" (40 mils) of wear was measured during 290m (950 ft.) of pulls at 610 kgffm (410 lbs./ft.) sidewall pressure.