This is a division of application Ser. No. 259,046, filed Apr. 30, 1981. Now U.S. Pat. No. 4,415,045.
Number | Name | Date | Kind |
---|---|---|---|
427149 | Brown | May 1980 | |
712002 | Packard | Oct 1902 | |
946841 | Gilman | Jan 1910 | |
1421857 | Store | Jul 1922 | |
2354142 | Quinn | Jul 1944 | |
3101798 | Wilson et al. | Aug 1963 | |
3114420 | Wilde | Dec 1963 | |
3248886 | Blenkarn | May 1963 | |
3252529 | Fischer | May 1966 | |
3282356 | Paulson et al. | Nov 1966 | |
3486555 | Vincent | Dec 1969 | |
3633685 | Piexoto | Jan 1972 | |
3672177 | Manning | Jun 1972 | |
3672447 | Kofahl | Jun 1972 | |
3955372 | Pogonowski et al. | May 1976 | |
3996755 | Kalinowski | Dec 1976 | |
4109477 | Vogel | Aug 1978 | |
4220421 | Thorne | Sep 1980 | |
4227831 | Evans | Oct 1980 | |
4269544 | Rusche | May 1981 | |
4323118 | Bergmann | Apr 1982 |
Number | Date | Country |
---|---|---|
866664 | Apr 1961 | GBX |
2039575 | Aug 1980 | GBX |
Entry |
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Floating Rigs Build Piers by H. K. Glidden, Roads & Streets, Feb. 1965. |
Wirth Airlift Drilling Rigs, Pile Boring Equipment, Published by Maschinen Und Bohrgerate Fabrik, Alfred Wirth & Co. K.G., 514 Erkelenz/Fed. Republic of Germany, P.O. Box 1327/1329. |
Review of Reverse Circulation Air Lift Methods for Big Hole Drilling by J. H. Allen, SME Transactions, Jun. 1977 pp. 86-93. |
Drilling Large Diameter Holes by J. H. Allen, Australasian Oil & Gas Review, Reprinted by Smith Tool Co. Division of Smith International Inc., Compton, Calif. |
Number | Date | Country | |
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Parent | 259046 | Apr 1981 |