Number | Name | Date | Kind |
---|---|---|---|
RE30115 | Herd et al. | Oct 1979 | |
2885172 | Nath | May 1959 | |
2974677 | Nath | Mar 1961 | |
3933338 | Herd et al. | Jan 1976 | |
4029294 | McCaskill et al. | Jun 1977 | |
4230299 | Pierce, Jr. | Oct 1980 |
Number | Date | Country |
---|---|---|
600536 | Mar 1978 | GBX |
Entry |
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Composite Catalog of Oil Field Equipment: Service World Oil, 1976, pp. 4085, 4086, 1340, 1341. |
How To Make a Valve Whirl Will Fail-Safe in Very Deep Water, 1977. |
Development of High Pressure Valves for Unattended Service, Fowler, ASME, 1967. |