Results are presented from an experimental study conducted to determine friction coefficient behavior in OCTG connections. The study was conducted using the OCTG friction and galling tester at Texas Tech University. The tester employs tubular pin and box specimen pairs fabricated from 73-mm (2 7/8 in.) diameter OCTG tubing. Friction coefficient was determined for test specimens made of material grades L80 and J55 at loads of up to 620 kN (140,000 lb) acting on a surface area of up to 645 mm2 (1 in.2) with sliding velocities of 0.53 and 1.78 cm/s (1 and 3.5 ft/min), and nominal surface roughnesses of 0.37, 1.2, and 1.5 micron (15, 47, and 60 μin.) Ra. An API Modified thread compound was used for all tests. When plotted versus the applied load, the friction coefficient behavior is seen to be highly nonlinear. In addition to load, the variables of sliding velocity, material, and surface roughness are shown to have an effect. Preliminary experiments show that the test surface geometry also has a significant effect on the friction coefficient.
Skip Nav Destination
Article navigation
October 1992
Research Papers
Effect of Some Material, Manufacturing, and Operating Variables on the Friction Coefficient in OCTG Connections
H. J. Carper, Jr.,
H. J. Carper, Jr.
Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-1021
Search for other works by this author on:
A. Ertas,
A. Ertas
Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-1021
Search for other works by this author on:
J. Issa,
J. Issa
Exxon Production Research Company, Houston, TX 77252-2189
Search for other works by this author on:
O. Cuvalci
O. Cuvalci
Karadeniz Teknik Universitesi, Turkey
Search for other works by this author on:
H. J. Carper, Jr.
Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-1021
A. Ertas
Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-1021
J. Issa
Exxon Production Research Company, Houston, TX 77252-2189
O. Cuvalci
Karadeniz Teknik Universitesi, Turkey
J. Tribol. Oct 1992, 114(4): 698-705 (8 pages)
Published Online: October 1, 1992
Article history
Received:
January 29, 1992
Revised:
May 1, 1992
Online:
June 5, 2008
Citation
Carper, H. J., Jr., Ertas, A., Issa, J., and Cuvalci, O. (October 1, 1992). "Effect of Some Material, Manufacturing, and Operating Variables on the Friction Coefficient in OCTG Connections." ASME. J. Tribol. October 1992; 114(4): 698–705. https://doi.org/10.1115/1.2920938
Download citation file:
Get Email Alerts
Related Articles
Rating Thread Compounds for Galling Resistance
J. Tribol (October,1995)
Experimental Studies on Galling Onset in OCTG Connections: A Review
J. Energy Resour. Technol (March,2008)
Experimental Investigation of Galling Resistance in OCTG Connections
J. Eng. Ind (February,1992)
Characterization of Adhesive Strength of Phosphate Coatings in Cold Metal Forming
J. Tribol (October,1997)
Related Chapters
Introduction
History of Line Pipe Manufacturing in North America
Part III Some Practical Advice
The Elements of Mechanical Design
Data Tabulations
Structural Shear Joints: Analyses, Properties and Design for Repeat Loading