Patents by Inventor Krishna M. Ravi

Krishna M. Ravi 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).

  • Publication number: 20110186290
    Abstract: A method of servicing a wellbore, comprising placing a wellbore composition comprising a plurality of Micro-Electro-Mechanical System (MEMS) sensors in the wellbore, placing a plurality of acoustic sensors in the wellbore, obtaining data from the MEMS sensors and data from the acoustic sensors using a plurality of data interrogation units spaced along a length of the wellbore, and transmitting the data obtained from the MEMS sensors and the acoustic sensors from an interior of the wellbore to an exterior of the wellbore. A method of servicing a wellbore, comprising placing a wellbore composition comprising a plurality of Micro-Electro-Mechanical System (MEMS) sensors in the wellbore, and obtaining data from the MEMS sensors using a plurality of data interrogation units spaced along a length of the wellbore, wherein one or more of the data interrogation units is powered by a turbo generator or a thermoelectric generator located in the wellbore.
    Type: Application
    Filed: February 21, 2011
    Publication date: August 4, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Craig W. RODDY, Rick Covington, Krishna M. Ravi, Clovis Bonavides, Michael Bittar, Gordon Moake, Batakrishna Mandal
  • Publication number: 20110077324
    Abstract: A variety of methods and compositions, including, in one embodiment, a method of treating a subterranean formation comprising introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.6. Another method of treating a subterranean formation comprises introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.05, wherein the particulate elastomer comprises a halogenated thermoplastic.
    Type: Application
    Filed: December 6, 2010
    Publication date: March 31, 2011
    Inventors: Krishna M. Ravi, Joseph K. Maxson, Ashok K. Santra
  • Patent number: 7913757
    Abstract: A method of cementing a wellbore in a subterranean formation, comprising formulating a cement composition that may be suitable for long-term zonal isolation of the subterranean formation by evaluating a subterranean formation, preparing a base cement composition, determining the compressive strength of the base cement composition, determining the tensile strength of the base cement composition, and adjusting the ratio of compressive strength to tensile strength as need to within a first optimizing range to form a first optimized cement composition, and placing the optimized cement composition in the wellbore.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: March 29, 2011
    Assignee: Halliburton Energy Services. Inc.
    Inventors: B. Raghava Reddy, Krishna M. Ravi
  • Patent number: 7878245
    Abstract: A variety of methods and compositions, including, in one embodiment, a method of treating a subterranean formation comprising introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.6. Another method of treating a subterranean formation comprises introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.05, wherein the particulate elastomer comprises a halogenated thermoplastic.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: February 1, 2011
    Assignee: Halliburton Energy Services Inc.
    Inventors: Krishna M. Ravi, Joseph K. Maxson, Ashok K. Santra
  • Patent number: 7866393
    Abstract: Methods are provided that include a method of reducing fluid loss in a subterranean formation comprising placing a lost circulation composition comprising a base fluid and a swellable elastomer in at least a portion of a subterranean formation comprising a lost circulation zone; allowing the swellable elastomer to at least partially swell upon contact with a fluid; and allowing the lost circulation composition to at least partially reduce the loss of fluid to the subterranean formation. Additional methods are also provided.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: January 11, 2011
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Anthony M. Badalamenti, Ashok K. Santra, John R. Podowski, Krishna M. Ravi, Gary Thomas Keene
  • Publication number: 20100218949
    Abstract: Methods are provided that include a method of reducing fluid loss in a subterranean formation comprising placing a lost circulation composition comprising a base fluid and a swellable elastomer in at least a portion of a subterranean formation comprising a lost circulation zone; allowing the swellable elastomer to at least partially swell upon contact with a fluid; and allowing the lost circulation composition to at least partially reduce the loss of fluid to the subterranean formation. Additional methods are also provided.
    Type: Application
    Filed: April 1, 2010
    Publication date: September 2, 2010
    Inventors: Anthony M. Badalamenti, Ashok K. Santra, John R. Podowski, Krishna M. Ravi, Gary Thomas Keene
  • Patent number: 7749942
    Abstract: Herein provided are variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid comprising: a base fluid; and a portion of elastic particles, the elastic particles having an isothermal compressibility factor in the range of from about 1.5×10?3 (1/psi) to about 1.5×10?9 (1/psi). Also provided are cement compositions comprising elastic particles, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more elastic particles are mixed with the cement before pumping the cement into a well bore. The elastic particles are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: July 6, 2010
    Assignee: Halliburton Energy Services, Inc
    Inventors: Krishna M. Ravi, Donald L. Whitfill, B. Raghava Reddy, Mike Szymanski
  • Patent number: 7717180
    Abstract: Methods are provided that include a method of reducing fluid loss in a subterranean formation comprising placing a lost circulation composition comprising a base fluid and a swellable elastomer in at least a portion of a subterranean formation comprising a lost circulation zone; allowing the swellable elastomer to at least partially swell upon contact with a fluid; and allowing the lost circulation composition to at least partially reduce the loss of fluid to the subterranean formation. Additional methods are also provided.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: May 18, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Anthony M. Badalamenti, Ashok K. Santra, John R. Podowski, Krishna M. Ravi, Gary Thomas Keene
  • Patent number: 7650940
    Abstract: Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: January 26, 2010
    Assignee: Halliburton Energy Services Inc.
    Inventors: B. Raghava Reddy, Krishna M Ravi
  • Patent number: 7645817
    Abstract: Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: January 12, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Krishna M Ravi
  • Patent number: 7543642
    Abstract: Cement compositions comprising flexible, compressible beads, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more flexible, compressible beads are mixed with the cement before pumping the cement into a well bore. The flexible, compressible beads are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene. The flexible, compressible beads may be heated to expand the beads before mixing with the cement such that the ensuing cement composition will have a desired density. Non-flexible beads such as spherulites may also be added to the cement compositions.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: June 9, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Krishna M. Ravi, Michael J. Szymanski
  • Publication number: 20090137431
    Abstract: Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.
    Type: Application
    Filed: January 21, 2009
    Publication date: May 28, 2009
    Applicant: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Mark R. Savery, Krishna M. Ravi, Donald L. Whitfill
  • Publication number: 20090120640
    Abstract: A variety of methods are disclosed, including, in one embodiment, a method of cementing comprising: introducing a pipe string into a well bore such that an annular space is defined between the pipe string and a wall of the well bore, wherein an annular structure is coupled to the pipe string, and wherein the annular structure comprises an expandable material; and introducing a cement composition into the annular space, wherein the cement composition comprises cement, water, and a component capable of responding to a crack formed in the cement composition after setting to inhibit flow of fluid through the crack. In certain embodiments, the method further comprises choosing the cement composition based at least partially on an analysis of well incidents.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 14, 2009
    Inventors: David Kulakofsky, Ronnie Faul, William Hunter, Krishna M. Ravi, Anthony Badalamenti
  • Publication number: 20090095475
    Abstract: A variety of methods and compositions are disclosed, including, in one embodiment, a method of treating a subterranean formation comprising introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.6. Another method of treating a subterranean formation comprises introducing a treatment fluid into a well bore, wherein the treatment fluid comprises a particulate elastomer having a specific gravity of at least about 1.05, wherein the particulate elastomer comprises a halogenated thermoplastic. Treatment fluids, methods of cementing, and cement compositions are also provided herein.
    Type: Application
    Filed: September 8, 2008
    Publication date: April 16, 2009
    Inventors: Krishna M. Ravi, Joseph K. Maxson, Ashok K. Santra
  • Patent number: 7493968
    Abstract: Improved lost circulation compositions that include melt-processed inorganic fibers and methods for using such compositions in subterranean formations are provided. An example of a method of the present invention is a method comprising providing a drilling mud comprising a plurality of melt-processed inorganic fibers, wherein the melt-processed inorganic fibers have a length of less than about 10 millimeters, and comprise at least one melt-processed inorganic fiber selected from the group consisting of: a basalt fiber, a wollastonite fiber, and a ceramic fiber; and circulating the drilling mud in the subterranean formation.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: February 24, 2009
    Inventors: B. Raghava Reddy, Krishna M. Ravi, Bryan K. Waugh
  • Publication number: 20090038800
    Abstract: Of the many methods and compositions provided herein, one method includes a method comprising introducing a sealant composition into a well bore that penetrates a subterranean formation, wherein the sealant composition comprises a base fluid, a binder material, and a filler material; and allowing the sealant composition to form a cohesive sealant. One composition provided herein includes a sealant composition comprising a base fluid, a binder material, and a filler material, wherein the sealant composition will form a cohesive sealant.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Inventors: Krishna M. Ravi, Gunnar Lende
  • Publication number: 20090038801
    Abstract: Of the many methods and compositions provided herein, one method includes a method comprising introducing a sealant composition into a well bore that penetrates a subterranean formation, wherein the sealant composition comprises a base fluid, a binder material, and a filler material; and allowing the sealant composition to form a cohesive sealant. One composition provided herein includes a sealant composition comprising a base fluid, a binder material, and a filler material, wherein the sealant composition will form a cohesive sealant.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Inventors: Krishna M. Ravi, Gunnar Lende
  • Publication number: 20090038855
    Abstract: Herein provided are variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid comprising: a base fluid; and a portion of elastic particles, the elastic particles having an isothermal compressibility factor in the range of from about 1.5×10?3 (1/psi) to about 1.5×10?9 (1/psi). Also provided are cement compositions comprising elastic particles, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more elastic particles are mixed with the cement before pumping the cement into a well bore. The elastic particles are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene.
    Type: Application
    Filed: July 1, 2008
    Publication date: February 12, 2009
    Inventors: Krishna M. Ravi, Donald L. Whitfill, B. Raghava Reddy, Mike Szymanski
  • Patent number: 7488705
    Abstract: Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: February 10, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventors: B. Raghava Reddy, Mark R. Savery, Krishna M. Ravi, Donald L. Whitfill
  • Patent number: 7482309
    Abstract: The present invention provides variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid comprising: a base fluid; and a portion of elastic particles, the elastic particles having an isothermal compressibility factor in the range of from about 1.5×10?3 (1/psi) to about 1.5×10?9 (1/psi).
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: January 27, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Krishna M. Ravi, Donald L. Whitfill, B. Raghava Reddy