This application is a continuation-in-part of U.S. patent application Ser. No. 311,118, filed Sep. 23, 1994, now U.S. Pat. No. 5,568,838.
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2735652 | Brady | Feb 1956 | |
2820610 | Martinez et al. | Jan 1958 | |
3059707 | Frisby | Oct 1962 | |
3127943 | Mori | Apr 1964 | |
3481412 | Rowley | Dec 1969 | |
3548958 | Blackwell et al. | Dec 1970 | |
4601354 | Campbell et al. | Jul 1986 | |
4765414 | Moore | Aug 1988 | |
4815342 | Brett et al. | Mar 1989 | |
4955438 | Juergens et al. | Sep 1990 | |
4981183 | Tibbitts | Jan 1991 | |
4982802 | Warren et al. | Jan 1991 | |
5009273 | Grabinski | Apr 1991 | |
5010765 | Duckworth et al. | Apr 1991 | |
5010789 | Brett et al. | Apr 1991 | |
5020612 | Williams | Jun 1991 | |
5029653 | Jurgens et al. | Jul 1991 | |
5038873 | Jurgens | Aug 1991 | |
5042596 | Brett et al. | Aug 1991 | |
5090492 | Keith | Feb 1992 | |
5099934 | Barr | Mar 1992 | |
5103921 | Zeer et al. | Apr 1992 | |
5109935 | Hawke | May 1992 | |
5111892 | Sinor et al. | May 1992 | |
5119892 | Clegg et al. | Jun 1992 | |
5131478 | Brett et al. | Jul 1992 | |
5165494 | Barr | Nov 1992 | |
5178222 | Jones et al. | Jan 1993 | |
5253720 | Radford et al. | Oct 1993 | |
5322135 | Travis | Jun 1994 | |
5339915 | Laporte et al. | Aug 1994 | |
5351765 | Ormsby | Oct 1994 | |
5448227 | Orban et al. | Sep 1995 | |
5568838 | Struthers et al. | Oct 1996 |
Number | Date | Country |
---|---|---|
0 197 696 A2 | Oct 1986 | EPX |
2 188 352 | Sep 1987 | GBX |
2 220 961 | Jan 1990 | GBX |
2231357 | Nov 1990 | GBX |
Entry |
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Rowley et al., the article entitled "Oriented Cores in 1964, Sign of a Technological Renaissance in Diamond Coring", Apr. 1964. |
Bonner, Steve, et al., "Resistivity While Drilling--Images from the String," Schlumberger Oilfield Review, Spring 1996, vol. 8, No. 1, pp. 1-19. |
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Sinor, L.A., et al., "Development of an Anti-Whirl Core Bit," SPE 24587, PP. 413-425, 1992. |
Number | Date | Country | |
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Parent | 311118 | Sep 1994 |