Ways to Improve the Drilling Effectiveness of Rock Bits by a Tribological Method

[+] Author and Article Information
Yi-Ling Wang, Hong Luo

Shanghai Jiao Tong University, Shanghai, People’s Republic of China

J. Tribol 110(2), 212-215 (Apr 01, 1988) (4 pages) doi:10.1115/1.3261585 History: Received January 12, 1987; Online October 29, 2009


Wear tests on the main bearings of 8.5 inch XHP 3 rock bits were performed, from which it is concluded that the way to improve the drilling effectiveness for the rock bits is to set drilling pressure and rotary speed properly, and to develop a new type of grease for rock bits which can bear a higher temperature than conventional grease. In addition, it is also shown that an inexpensive copper alloy can take the place of expensive Ag85Mn15 as an anti-wear material in the bearing, so that the production cost for the rock bits can be reduced.

Copyright © 1988 by ASME
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