Number | Name | Date | Kind |
---|---|---|---|
4198706 | Elliott | Apr 1980 | |
4785300 | Chin et al. | Nov 1988 | |
4847815 | Malone | Jul 1989 | |
4914637 | Goodsman | Apr 1990 | |
4956823 | Russell et al. | Sep 1990 | |
5357483 | Innes | Oct 1994 | |
5375098 | Malone et al. | Dec 1994 | |
5517464 | Lerner et al. | May 1996 |
Entry |
---|
Attang et al, SPE/IAPC Drilling Conf., Feb. 23, 1993, pp. 149-159; abst. only herewith. |