Number | Name | Date | Kind |
---|---|---|---|
3840071 | Baugh et al. | Oct 1974 | |
4219223 | Schulte | Aug 1980 | |
4411454 | Nayler et al. | Oct 1983 | |
4457489 | Gilmore | Jul 1984 | |
4460156 | Hazelrigg et al. | Jul 1984 | |
4637419 | Hughes | Jan 1987 | |
4637470 | Weathers et al. | Jan 1987 | |
4852611 | Knerr et al. | Aug 1989 | |
4899822 | Daeschler et al. | Feb 1990 | |
5042530 | Good et al. | Aug 1991 |
Entry |
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Composite Catalog of Oilfield Equipment and Services, 1982-83, vol. 3, pp. 4559-4561, published by World Oil. |