Number | Name | Date | Kind |
---|---|---|---|
2921601 | Fisher | Jan 1960 | |
3993129 | Watkins | Nov 1976 | |
4042033 | Holland et al. | Aug 1977 | |
4215748 | Pace et al. | Aug 1980 | |
4216830 | Fredd | Aug 1980 | |
4407329 | Huebsch et al. | Oct 1983 | |
4407363 | Akkerman | Oct 1983 | |
4427071 | Carmody | Jan 1984 | |
4449587 | Rodenberger et al. | May 1984 | |
4452310 | Pringle et al. | Jun 1984 | |
4457376 | Carmody et al. | Jul 1984 | |
4503913 | Carmody | Mar 1985 | |
4527630 | Pringle | Jul 1985 | |
4562854 | Pringle et al. | Jan 1986 | |
4565215 | Cummings | Jan 1986 | |
4565216 | Giebeler | Jan 1986 | |
4601342 | Pringle | Jul 1986 |
Entry |
---|
Jerry Rubli, "New Developments in Subsurface Safety Valve Technology", Petroleum Engineer International, May 1980, pp. 96-110. |