Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1996-04-24
1998-08-18
Tsay, Frank
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175372, 384 95, E21B 1022
Patent
active
057947260
ABSTRACT:
A rotary rock bit is formed as a rock bit body, a bearing shaft supported by the rock bit body, a rotary cutter adapted to be rotatably mounted on the bearing shaft, and at least one bearing that promotes rotation between the rotary cutter and the bearing shaft. Each bearing includes a bearing element having a steel matrix with steel-free volumes distributed therethrough. The matrix is a hypoeutectoid steel having more than about 0.40 weight percent carbon. An anti-galling alloy resides within the steel-free volumes of the steel matrix. The anti-galling alloy is a silver-copper alloy having a composition of from about 85 weight percent to about 95 weight percent silver, balance copper.
REFERENCES:
patent: 2096252 (1937-10-01), Koehring
patent: 2365562 (1944-12-01), Koehring
patent: 2706693 (1955-04-01), Haller
patent: 2728134 (1955-12-01), Haller
patent: 3235316 (1966-02-01), Whanger
patent: 3492120 (1970-01-01), Haller
patent: 3890018 (1975-06-01), Clamon
patent: 3984158 (1976-10-01), Sorensen et al.
patent: 3992763 (1976-11-01), Haynie et al.
patent: 4012238 (1977-03-01), Scales
patent: 4026657 (1977-05-01), Chmura
patent: 4040680 (1977-08-01), Keller
patent: 4105263 (1978-08-01), Sorensen et al.
patent: 4121927 (1978-10-01), Lohman et al.
patent: 4207658 (1980-06-01), Sorensen
patent: 4232912 (1980-11-01), Williamson
patent: 4304444 (1981-12-01), Persson
patent: 4514097 (1985-04-01), Daly
patent: 4641976 (1987-02-01), Kar
patent: 4875532 (1989-10-01), Langford, Jr.
L.A. Zagorski et al., "The Effect of the Furnace Atmosphere on the Infiltration of Iron-Powder Compacts," International Journal of Powder Metallurgy, vol. 7, No. 2, pp. 41-53 (1971).
Dresser Indistries
Garmong Gregory
Peoples William R.
Tsay Frank
LandOfFree
Rotary rock bit with infiltrated bearings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary rock bit with infiltrated bearings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary rock bit with infiltrated bearings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1107181