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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US412515917 Oct 197714 Nov 1978Method and apparatus for isolating and treating subsurface stratas
US429928719 May 198010 Nov 1981Geo Vann, Inc.Bar actuated vent assembly and perforating gun
US448069010 Feb 19836 Nov 1984Geo Vann, Inc.Accelerated downhole pressure testing
US459877128 Feb 19858 Jul 1986Geo Vann, Inc.Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure
US469331418 Feb 198615 Sep 1987Halliburton CompanyLow actuation pressure bar vent
US479038513 Nov 198413 Dic 1988Dresser Industries, Inc.Method and apparatus for perforating subsurface earth formations
US508855715 Mar 199018 Feb 1992Dresser Industries, Inc.Downhole pressure attenuation apparatus
US638629210 Ene 200014 May 2002Wellbore annulus packer apparatus and method
US802875114 Abr 20094 Oct 2011Halliburton Energy Services, Inc.Perforation method and apparatus
USRE3275528 Mar 198627 Sep 1988Halliburton CompanyAccelerated downhole pressure testing