Patents by Inventor Hemant K. Ladva

Hemant K. Ladva 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: 8397816
    Abstract: A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: March 19, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Patent number: 8322410
    Abstract: An apparatus including at least four different modules, the first module being a treatment conditions module structured to interpret a specified pumping rate and a specified salt concentration. The second is a hydration requirements module structured to determine at least one of a hydration vessel fluid volume and a specified temperature in response to the specified pumping rate. The third is a dynamic brine generation module structured to control a flow rate of a first fluid, at least one of a clay stabilizer precursor, an acid precursor and a base precursor; and a polymer material into a hydration vessel in response to the specified salt concentration and the at least one of the hydration vessel fluid volume and the specified temperature. The fourth is a treatment fluid flow module structured to control a flow rate of a treatment fluid from the hydration vessel in response to the specified pumping rate.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: December 4, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Publication number: 20120149606
    Abstract: A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process.
    Type: Application
    Filed: February 16, 2012
    Publication date: June 14, 2012
    Applicant: Schlumberger Technology Corporation
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Publication number: 20120145376
    Abstract: A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process.
    Type: Application
    Filed: February 16, 2012
    Publication date: June 14, 2012
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Patent number: 8141640
    Abstract: A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: March 27, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Patent number: 7971644
    Abstract: A system includes a hydraulic fracturing fluid including a polymeric constituent and an additive having particles including poly-vinyl acetate in an amount sufficient to control fluid loss. The system includes a formation of interest having a downhole temperature, and the particles including poly-vinyl acetate have a size and/or shape such that the poly-vinyl acetate hydrolyses at the downhole temperature. The particles may have a size and/or shape such that the particles are deformable at the downhole temperature. The poly-vinyl acetate in the particles may be a part of the particle substrate, a coating on the particles, and/or the entire particle may be poly-vinyl acetate. The poly-vinyl acetate may be included in any portion of the hydraulic fracturing fluid, or only the portion of the hydraulic fracturing fluid that is not proppant laden.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: July 5, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Hemant K. Ladva, Syed Ali, Mohan K. R. Panga, Richard D. Hutchins, Don Williamson
  • Publication number: 20110036582
    Abstract: Embodiments of this invention relate to an apparatus and a method for treating a subterranean formation permeated by a wellbore including forming a fluid comprising a reverse emulsion and a degradable material, introducing the fluid into a wellbore, and allowing the degradable material to degrade. Embodiments of this invention relate to an apparatus and a method for treating a subterranean formation permeated by a wellbore including forming a fluid comprising a reverse emulsion and a fluid loss additive, introducing the fluid into a wellbore, and allowing the fluid loss additive to degrade.
    Type: Application
    Filed: August 14, 2009
    Publication date: February 17, 2011
    Inventors: Hemant K. Ladva, Syed Ali, Don Williamson, Mathew M. Samuel
  • Publication number: 20110028357
    Abstract: A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 3, 2011
    Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
  • Patent number: 7779915
    Abstract: Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert degradable polymers and an optional viscosifier, injecting the aqueous fluid into the wellbore at a pressure equal to or greater than the formation's fracture initiation pressure, and thereafter injecting into the wellbore a proppant laden fluid at a pressure equal to or greater than the formation's fracture initiation pressure. The water inert degradable polymer may be a polymer such as an emulsion polymer or a latex polymer. Some methods of the invention use a fluid which may have a normalized leak off coefficient (Cw/sqrt(K)) equal to or less than about 0.0022, 0.0014, or 0.0010. A conventional fluid loss additive may or may not be used in conjunction with the treatment fluid and/or the proppant laden fluid. The water inert degradable polymer may or may not substantially enter formation pores.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: August 24, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard D. Hutchins, Hemant K. Ladva, Don Williamson, Sylvie Daniel
  • Publication number: 20100181065
    Abstract: A system includes a hydraulic fracturing fluid including a polymeric constituent and an additive having particles including poly-vinyl acetate in an amount sufficient to control fluid loss. The system includes a formation of interest having a downhole temperature, and the particles including poly-vinyl acetate have a size and/or shape such that the poly-vinyl acetate hydrolyses at the downhole temperature. The particles may have a size and/or shape such that the particles are deformable at the downhole temperature. The poly-vinyl acetate in the particles may be a part of the particle substrate, a coating on the particles, and/or the entire particle may be poly-vinyl acetate. The poly-vinyl acetate may be included in any portion of the hydraulic fracturing fluid, or only the portion of the hydraulic fracturing fluid that is not proppant laden.
    Type: Application
    Filed: January 20, 2009
    Publication date: July 22, 2010
    Inventors: Hemant K. Ladva, Syed Ali, Mohan K.R. Panga, Richard D. Hutchins, Don Williamson
  • Patent number: 7703521
    Abstract: Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water-in-water emulsion and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water in water emulsion, isolating the microspheres from the emulsion, and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid to treat a subterranean formation including introducing a crosslinkable polymer, partitioning agent, and crosslinker into a solvent, crosslinking the crosslinkable polymer, isolating beads of the crosslinkable polymer from the partitioning agent, introducing the beads into a fluid for treating a subterranean formation.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: April 27, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Philip F. Sullivan, Gary John Tustin, Don Williamson, Hemant K. Ladva
  • Publication number: 20090205824
    Abstract: Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water-in-water emulsion and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water in water emulsion, isolating the microspheres from the emulsion, and introducing the microspheres into the subterranean formation. Methods and apparatus for forming a fluid to treat a subterranean formation including introducing a crosslinkable polymer, partitioning agent, and crosslinker into a solvent, crosslinking the crosslinkable polymer, isolating beads of the crosslinkable polymer from the partitioning agent, introducing the beads into a fluid for treating a subterranean formation.
    Type: Application
    Filed: January 14, 2009
    Publication date: August 20, 2009
    Inventors: Philip F. Sullivan, Gary John Tustin, Don Williamson, Hemant K. Ladva
  • Publication number: 20080289828
    Abstract: Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert degradable polymers and an optional viscosifier, injecting the aqueous fluid into the wellbore at a pressure equal to or greater than the formation's fracture initiation pressure, and thereafter injecting into the wellbore a proppant laden fluid at a pressure equal to or greater than the formation's fracture initiation pressure. The water inert degradable polymer may be a polymer such as an emulsion polymer or a latex polymer. Some methods of the invention use a fluid which may have a normalized leak off coefficient (Cw/sqrt(K)) equal to or less than about 0.0022, 0.0014, or 0.0010. A conventional fluid loss additive may or may not be used in conjunction with the treatment fluid and/or the proppant laden fluid. The water inert degradable polymer may or may not substantially enter formation pores.
    Type: Application
    Filed: June 13, 2008
    Publication date: November 27, 2008
    Inventors: Richard D. Hutchins, Hemant K. Ladva, Don Williamson, Sylvie Daniel