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| US4706747 | 25 Nov 1985 | 17 Nov 1987 | Weatherford U.S., Inc. | Cementing plug | | US4756365 | 4 Sep 1986 | 12 Jul 1988 | Weatherford U.S. Inc. | Cementing plug | | US4842062 | 5 Feb 1988 | 27 Jun 1989 | Weatherford U.S., Inc. | Hydraulic lock alleviation device, well cementing stage tool, and related methods | | US4979562 | 21 Oct 1988 | 25 Dic 1990 | Weatherford U.S., Inc. | Float equipment including float collars and modular plugs for well operations | | US5025858 | 2 May 1990 | 25 Jun 1991 | Weatherford U.S., Inc. | Well apparatuses and anti-rotation device for well apparatuses | | US5113940 | 15 May 1991 | 19 May 1992 | Weatherford U.S., Inc. | Well apparatuses and anti-rotation device for well apparatuses | | US5242018 | 16 Oct 1991 | 7 Sep 1993 | LaFleur Petroleum Services, Inc. | Cementing plug | | US5246069 | 23 Mar 1992 | 21 Sep 1993 | Weatherford-Petco, Inc. | Self-aligning well apparatuses and anti-rotation device for well apparatuses | | US5311940 | 29 Mar 1993 | 17 May 1994 | LaFleur Petroleum Services, Inc. | Cementing plug | | US5368098 | 23 Jun 1993 | 29 Nov 1994 | Weatherford U.S., Inc. | Stage tool | | US5390736 | 21 Jun 1993 | 21 Feb 1995 | Weatherford/Lamb, Inc. | Anti-rotation devices for use with well tools | | US5433270 | 29 Abr 1994 | 18 Jul 1995 | LaFleur Petroleum Services, Inc. | Cementing plug | | US5435386 | 7 Nov 1994 | 25 Jul 1995 | LaFleur Petroleum Services, Inc. | Cementing plug | | US5464062 | 12 Oct 1994 | 7 Nov 1995 | Weatherford U.S., Inc. | Metal-to-metal sealable port | | US6712153 | 27 Jun 2001 | 30 Mar 2004 | Weatherford/Lamb, Inc. | Resin impregnated continuous fiber plug with non-metallic element system | | US7036602 | 14 Jul 2003 | 2 May 2006 | Weatherford/Lamb, Inc. | Retrievable bridge plug | | US7124831 | 8 Abr 2005 | 24 Oct 2006 | Weatherford/Lamb, Inc. | Resin impregnated continuous fiber plug with non-metallic element system | | US7341105 | 20 Jun 2006 | 11 Mar 2008 | Holcim (US) Inc. | Cementitious compositions for oil well cementing applications | | US7389823 | 31 Ene 2006 | 24 Jun 2008 | Weatherford/Lamb, Inc. | Retrievable bridge plug | | US7527688 | 19 Dic 2007 | 5 May 2009 | Holcim (US) Inc. | Cementitious compositions for oil well cementing applications | | US7779927 | 23 Dic 2009 | 24 Ago 2010 | Weatherford/Lamb, Inc. | Non-metallic mandrel and element system | | US7779928 | 23 Dic 2009 | 24 Ago 2010 | Weatherford/Lamb, Inc. | Non-metallic mandrel and element system | | US7789135 | 23 Dic 2009 | 7 Sep 2010 | Weatherford/Lamb, Inc. | Non-metallic mandrel and element system | | US7789136 | 23 Dic 2009 | 7 Sep 2010 | Weatherford/Lamb, Inc. | Non-metallic mandrel and element system | | US7789137 | 23 Dic 2009 | 7 Sep 2010 | Weatherford/Lamb, Inc. | Non-metallic mandrel and element system | | US7909109 | 22 Oct 2007 | 22 Mar 2011 | Tesco Corporation | Anchoring device for a wellbore tool | | US8002030 | 23 Jun 2008 | 23 Ago 2011 | Weatherford/Lamb, Inc. | Retrievable bridge plug |
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