Number | Name | Date | Kind |
---|---|---|---|
4465147 | Feenstra et al. | Aug 1984 | |
4660657 | Furse et al. | Apr 1987 | |
4667751 | Geczy et al. | May 1987 | |
4697651 | Dellinger | Oct 1987 | |
4817740 | Beimgraben | Apr 1989 | |
4877092 | Helm et al. | Oct 1989 | |
4886130 | Evans | Dec 1989 | |
4932482 | DeLucia | Jun 1990 |
Entry |
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SPE Paper No. 13026, "PDM Versus Turbo-Drill: A Drilling Comparison", 1984. |