Patents by Inventor Marcus A. Duffy

Marcus A. Duffy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cement composition for lost circulation application and method of cementing
    Patent number: 10479923
    Abstract: A method of cementing a subterranean formation includes providing a cement composition comprising cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier, where the solid materials are about 0 wt % to about 40 wt % of the total weight of the cement composition; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Cement compositions include cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 19, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Sandip Prabhakar Patil, Rahul Chandrakant Patil, Krishna M. Ravi, Sheetal Singh, Trissa Joseph, Marcus Duffy
  • LIQUID CONCENTRATE OF A STRENGTH RETROGRESSION ADDITIVE
    Publication number: 20170240794
    Abstract: A liquid concentrate for use in a well that penetrates a subterranean formation comprising: a base liquid; and a strength retrogression additive, wherein the strength retrogression additive consists of particles of silicon dioxide containing crystalline regions, wherein the liquid concentrate has an activity of at least 40%.
    Type: Application
    Filed: September 23, 2014
    Publication date: August 24, 2017
    Inventors: Benjamin J. Iverson, Robert L. Browning, Marcus A. Duffy
  • Pozzolan for use in a cement composition having a low heat of hydration
    Patent number: 9487691
    Abstract: A method of cementing in a subterranean formation comprises: introducing a cement composition into a wellbore penetrating the subterranean formation, wherein at least a portion of the subterranean formation has a temperature less than or equal to the freezing point of an aqueous liquid, and wherein the cement composition comprises: (A) cement; (B) water; and (C) a pozzolan, wherein the cement composition has a heat of hydration of less than 50 BTU per pound; and causing or allowing the cement composition to set in the wellbore after the step of introducing. The pozzolan can have a calcium oxide concentration of less than 15% by weight of the pozzolan, and the pozzolan can have a concentration of at least 15% by weight of the cement. Gas hydrates can be present in or adjacent to a portion of the well.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: November 8, 2016
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Krishna M. Ravi, Rahul C. Patil, Sandip P. Patil, Trissa Joseph, Marcus Duffy
  • Novel Cement Composition for Lost Circulation Application
    Publication number: 20160160109
    Abstract: A method of cementing a subterranean formation includes providing a cement composition comprising cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier, where the solid materials are about 0 wt % to about 40 wt % of the total weight of the cement composition; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Cement compositions include cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier.
    Type: Application
    Filed: November 25, 2013
    Publication date: June 9, 2016
    Applicant: Haliburton Energy Services, Inc.
    Inventors: Sandip Prabhakar PATIL, Rahul Chandrakant PATIL, Krishan M. RAVI, Sheetal SINGH, Trissa JOSEPH, Marcus DUFFY
  • POZZOLAN FOR USE IN A CEMENT COMPOSITION HAVING A LOW HEAT OF HYDRATION
    Publication number: 20140332216
    Abstract: A method of cementing in a subterranean formation comprises: introducing a cement composition into a wellbore penetrating the subterranean formation, wherein at least a portion of the subterranean formation has a temperature less than or equal to the freezing point of an aqueous liquid, and wherein the cement composition comprises: (A) cement; (B) water; and (C) a pozzolan, wherein the cement composition has a heat of hydration of less than 50 BTU per pound; and causing or allowing the cement composition to set in the wellbore after the step of introducing. The pozzolan can have a calcium oxide concentration of less than 15% by weight of the pozzolan, and the pozzolan can have a concentration of at least 15% by weight of the cement. Gas hydrates can be present in or adjacent to a portion of the well.
    Type: Application
    Filed: May 7, 2013
    Publication date: November 13, 2014
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Krishna M. RAVI, Rahul C. PATIL, Sandip P. PATIL, Trissa JOSEPH, Marcus Duffy