Patents by Inventor B. Raghava Reddy

B. Raghava Reddy 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).

  • Patent number: 10604691
    Abstract: A well treatment composition for use in a hydrocarbon-bearing reservoir comprising a reversible aminal gel composition. The reversible aminal gel composition includes a liquid precursor composition. The liquid precursor composition is operable to remain in a liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition; an aldehyde composition; a polar aprotic organic solvent; and a metal salt composition with valence 3, 4, or 5. The liquid precursor composition transitions from the liquid state to a gel state responsive to an increase in temperature in the hydrocarbon-bearing reservoir.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 31, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Peter J. Boul, B. Raghava Reddy, Matt Hilfiger, Carl Thaemlitz
  • Patent number: 10590326
    Abstract: The present application provides an aqueous fluid containing a gas-generating compound such as an azo compound, a hydrazide compound, or a semicarbazide compound. The aqueous fluid may also contain an amine compound, an oxidizer, or viscosifier, and a foaming surfactant. The aqueous composition may be storable at pH of less than about 5 without any appreciable gas generation, and may be activated to produce gas when mixed with a wellbore fluid for use in downhole applications.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: March 17, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10584547
    Abstract: An oil-swellable lost circulation material (LCM) formed from an elastomeric polymer and a crosslinker amine is provided. The LCM may be formed from elastomeric polymer particles, a crosslinker amine, an anti-agglomerating agent, and may also be formed using a cure accelerator. A mixture of the elastomeric polymer particles, the crosslinker amine, the anti-agglomerating agent, and in some mixtures the cure accelerator, may be hot rolled at a temperature of at least 120° F. for a duration. The resulting LCM may swell by absorbing about 20 to about 34 times its weight when introduced to a loss circulation zone in the presence of a non-aqueous fluid such as a drilling mud or component of a drilling mud.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: March 10, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10584548
    Abstract: An oil-swellable lost circulation material (LCM) formed from an elastomeric polymer and a crosslinker amine is provided. The LCM may be formed from elastomeric polymer particles, a crosslinker amine, an anti-agglomerating agent, and may also be formed using a cure accelerator. A mixture of the elastomeric polymer particles, the crosslinker amine, the anti-agglomerating agent, and in some mixtures the cure accelerator, may be hot rolled at a temperature of at least 120° F. for a duration. The resulting LCM may swell by absorbing about 20 to about 34 times its weight when introduced to a loss circulation zone in the presence of a non-aqueous fluid such as a drilling mud or component of a drilling mud.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: March 10, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10556829
    Abstract: Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, improved elasticity and self-healing properties and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and a block copolymer composition. The block copolymer composition has at least one copolymer backbone, with each copolymer backbone comprising at least two hard segments. Furthermore, a soft segment is disposed between the at least two hard segments. The copolymer backbone has at least one anhydride group grafted onto the soft segment, and the anhydride group is crosslinked by an aminosilane crosslinker.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10557076
    Abstract: Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well are provided. A Portland cement clinker LCM may include Portland cement clinker, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement clinker LCM may include Portland cement clinker and a crosslinked fluid, such as a polyuronide crosslinked via calcium ions or a polysaccharide crosslinked via divinyl sulfone. Yet another Portland cement clinker LCM may include Portland cement clinker and polymer fibers or particulate glass. Methods of lost circulation control using a Portland cement clinker LCM are also provided.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10544351
    Abstract: This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 28, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10544350
    Abstract: This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: January 28, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10544347
    Abstract: A method for formulating a hydraulic fracturing fluid composition with increased viscosity and resistance to degradation at increased temperature and pressure. The method includes preparing an alkanolamine borate formulation compatible for mixing with a hydraulic fracturing fluid comprising polysaccharides; preparing the hydraulic fracturing fluid comprising polysaccharides; and mixing the alkanolamine borate formulation with the hydraulic fracturing fluid, such that the alkanolamine borate formulation causes crosslinking of the hydraulic fracturing fluid.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: January 28, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: B. Raghava Reddy, Feng Liang, Leiming Li
  • Patent number: 10526458
    Abstract: This document relates to non-aqueous compositions including a maleic anhydride copolymer and a polyamine or polyaziridine crosslinker. The maleic anhydride copolymer includes repeat units I and II: Each R1 is independently —H, —(C1-C5)alkyl, —C?O(O)(C1-C5)alkyl, or aryl; and each R2 is independently —H, —(C1-C5)alkyl, —C?O(O)(C1-C5)alkyl, and aryl.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: January 7, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: B. Raghava Reddy, Matthew Gary Hilfiger
  • Patent number: 10526524
    Abstract: This document relates to settable, non-hydraulic foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: January 7, 2020
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Publication number: 20190390099
    Abstract: The present disclosure relates to downhole fluid additives including a clay, a hydroxylated polymer, a cation, and water. The disclosure further relates to downhole fluids, including drilling fluids, spaces, cements, and proppant delivery fluids containing such as downhole fluid additive and methods of using such fluids. The downhole fluid additive may have any of a variety of functions in the downhole fluid and may confer any of a variety of properties upon it, such as salt tolerance or desired viscosities even at high downhole temperatures.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Vivek S. Goel, Peter James Boul, Xueyu Pang, Lee J. Hall, Jay P. Deville, Samuel J. Lewis, B. Raghava Reddy, Trissa Joseph, Xiangnan Ye
  • Publication number: 20190367794
    Abstract: A well treatment composition for use in a hydrocarbon-bearing reservoir, optionally as a kill pill, and comprising a reversible aminal gel composition is disclosed. The reversible aminal gel composition includes a liquid precursor composition. The liquid precursor composition is operable to remain in a liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition; an aldehyde composition; a polar aprotic organic solvent; and a metal salt composition. The liquid precursor composition transitions from the liquid state to a gel state responsive to an increase in temperature in the hydrocarbon-bearing reservoir.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 5, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Peter J. Boul, B. Raghava Reddy, Matt Hilfiger, Carl Thaemlitz, Diana Rasner
  • Patent number: 10494561
    Abstract: Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well. A Portland cement clinker may include Portland cement clinker, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement clinker LCM may include Portland cement choker and a crosslinked fluid, such as a polyuronide crosslinked via calcium ions or a polysaccharide crosslinked via divinyl sulfone. Yet another Portland cement clinker may include Portland cement clinker and polymer fibers or particulate glass. Methods of lost circulation control using a Portland cement clinker LCM are also provided.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: December 3, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Publication number: 20190359877
    Abstract: A well treatment composition for use in a hydrocarbon-bearing reservoir comprising a reversible aminal gel composition is disclosed. The reversible aminal gel composition includes a liquid precursor composition. The liquid precursor composition is operable to remain in a liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition; an aldehyde composition; a polar aprotic organic solvent; and a metal salt composition with valence 3, 4, or 5. The liquid precursor composition transitions from the liquid state to a gel state responsive to an increase in temperature in the hydrocarbon-bearing reservoir.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 28, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Peter J. Boul, B. Raghava Reddy, Matt Hilfiger, Carl Thaemlitz
  • Publication number: 20190352554
    Abstract: A well treatment composition for use in a hydrocarbon-bearing reservoir comprising a reversible aminal gel composition is disclosed. The reversible aminal gel composition includes a liquid precursor composition. The liquid precursor composition is operable to remain in a liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition; an aldehyde composition; a polar aprotic organic solvent; and a metal salt composition with valence 3, 4, or 5. The liquid precursor composition transitions from the liquid state to a gel state responsive to an increase in temperature in the hydrocarbon-bearing reservoir.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 21, 2019
    Applicant: Saudi Arabian Oil Company
    Inventors: Peter J. Boul, B. Raghava Reddy, Matt Hilfiger, Carl Thaemlitz
  • Publication number: 20190338178
    Abstract: Treating a subterranean formation with a composition including a maleic anhydride copolymer, an amine crosslinker, and a gelling agent. The maleic anhydride copolymer includes first repeat units I and II and at least one of second repeat units III and IV: where each R1 is independently-H, —O(C1-C5) alkyl, or —(C1-C5) alkyl; each R2 is independently-H, —O(C1-C5) alkyl, or —(C1-C5) alkyl; each R3 is independently —OH or —O?M1, each M1 is independently an alkali metal, an alkaline earth metal, an ammonium ion, or a quaternary ammonium ion; and each R4 is independently-NH2 or —OM1. The gelling agent includes at least one of: a calcium chelating agent, a calcium precipitating agent, a pH buffer, an agent reactive with hydroxide, and an acid generating agent, and promotes formation of a gel from the maleic anhydride copolymer and the amine crosslinker in contact with set cement.
    Type: Application
    Filed: July 12, 2019
    Publication date: November 7, 2019
    Inventors: B. Raghava Reddy, Matthew Hilfiger
  • Patent number: 10450495
    Abstract: This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 22, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10450496
    Abstract: Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well are provided. A Portland cement clinker LCM may include Portland cement clinker, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement clinker LCM may include Portland cement clinker and a crosslinked fluid, such as a polyuronide crosslinked via calcium ions or a polysaccharide crosslinked via divinyl sulfone. Yet another Portland cement clinker LCM may include Portland cement clinker and polymer fibers or particulate glass. Methods of lost circulation control using a Portland cement clinker LCM are also provided.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: October 22, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10450497
    Abstract: Portland cement clinker LCMs that include Portland cement clinker to mitigate or prevent lost circulation in a well are provided. A Portland cement clinker LCM may include Portland cement clinker, Portland cement, a carrier fluid, and an inorganic consolidation activator. Another Portland cement clinker LCM may include Portland cement clinker and a crosslinked fluid, such as a polyuronide crosslinked via calcium ions or a polysaccharide crosslinked via divinyl sulfone. Yet another Portland cement clinker LCM may include Portland cement clinker and polymer fibers or particulate glass. Methods of lost circulation control using a Portland cement clinker LCM are also provided.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: October 22, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy