|
| US4125159 | 17 Oct 1977 | 14 Nov 1978 | | Method and apparatus for isolating and treating subsurface stratas |
| US4299287 | 19 May 1980 | 10 Nov 1981 | Geo Vann, Inc. | Bar actuated vent assembly and perforating gun |
| US4480690 | 10 Feb 1983 | 6 Nov 1984 | Geo Vann, Inc. | Accelerated downhole pressure testing |
| US4598771 | 28 Feb 1985 | 8 Jul 1986 | Geo Vann, Inc. | Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure |
| US4693314 | 18 Feb 1986 | 15 Sep 1987 | Halliburton Company | Low actuation pressure bar vent |
| US4790385 | 13 Nov 1984 | 13 Dic 1988 | Dresser Industries, Inc. | Method and apparatus for perforating subsurface earth formations |
| US5088557 | 15 Mar 1990 | 18 Feb 1992 | Dresser Industries, Inc. | Downhole pressure attenuation apparatus |
| US6386292 | 10 Ene 2000 | 14 May 2002 | | Wellbore annulus packer apparatus and method |
| US8028751 | 14 Abr 2009 | 4 Oct 2011 | Halliburton Energy Services, Inc. | Perforation method and apparatus |
| USRE32755 | 28 Mar 1986 | 27 Sep 1988 | Halliburton Company | Accelerated downhole pressure testing |