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Patentes

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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US460374119 Feb 19855 Ago 1986Hughes Tool CompanyWeight actuated tubing valve
US48420625 Feb 198827 Jun 1989Weatherford U.S., Inc.Hydraulic lock alleviation device, well cementing stage tool, and related methods
US536809823 Jun 199329 Nov 1994Weatherford U.S., Inc.Stage tool
US546406212 Oct 19947 Nov 1995Weatherford U.S., Inc.Metal-to-metal sealable port
US564102115 Nov 199524 Jun 1997Halliburton Energy ServicesWell casing fill apparatus and method
US608245929 Jun 19984 Jul 2000Halliburton Energy Services, Inc.Drill string diverter apparatus and method
US618276628 May 19996 Feb 2001Halliburton Energy Services, Inc.Drill string diverter apparatus and method
US657187624 May 20013 Jun 2003Halliburton Energy Services, Inc.Fill up tool and mud saver for top drives
US681095820 Dic 20012 Nov 2004Halliburton Energy Services, Inc.Circulating cementing collar and method
US72846192 Feb 200523 Oct 2007Tam International, Inc.Packer with positionable collar
US73224323 Dic 200429 Ene 2008Halliburton Energy Services, Inc.Fluid diverter tool and method
US76947323 Dic 200413 Abr 2010Halliburton Energy Services, Inc.Diverter tool