|
| US4049233 | 30 Sep 1976 | 20 Sep 1977 | Stal Refrigeration AB | Device for establishing and breaking a fluid communication |
| US4163562 | 18 Abr 1977 | 7 Ago 1979 | | Inflatable packer |
| US4449584 | 12 Ago 1982 | 22 May 1984 | | Inflatable flowing hole plug |
| US4467865 | 1 Abr 1983 | 28 Ago 1984 | | Well packer provided with dual methods of use |
| US4711501 | 26 Jul 1985 | 8 Dic 1987 | Okumura Machinery Corporation
Seibu Polymer Kasei Kabushiki Kaisha | Rock crushing device |
| US5190109 | 4 Oct 1991 | 2 Mar 1993 | Texaco Inc. | Method and apparatus for isolating well bores using external packers |
| US7669653 | 20 Feb 2004 | 2 Mar 2010 | Schlumberger Technology Corporation | System and method for maintaining zonal isolation in a wellbore |
