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).
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Patent number: 8397816Abstract: 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: GrantFiled: February 16, 2012Date of Patent: March 19, 2013Assignee: Schlumberger Technology CorporationInventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Patent number: 8322410Abstract: 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: GrantFiled: February 16, 2012Date of Patent: December 4, 2012Assignee: Schlumberger Technology CorporationInventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Publication number: 20120149606Abstract: 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: ApplicationFiled: February 16, 2012Publication date: June 14, 2012Applicant: Schlumberger Technology CorporationInventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Publication number: 20120145376Abstract: 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: ApplicationFiled: February 16, 2012Publication date: June 14, 2012Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Patent number: 8141640Abstract: 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: GrantFiled: July 29, 2009Date of Patent: March 27, 2012Assignee: Schlumberger Technology CorporationInventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Patent number: 7971644Abstract: 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: GrantFiled: January 20, 2009Date of Patent: July 5, 2011Assignee: Schlumberger Technology CorporationInventors: Hemant K. Ladva, Syed Ali, Mohan K. R. Panga, Richard D. Hutchins, Don Williamson
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Publication number: 20110036582Abstract: 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: ApplicationFiled: August 14, 2009Publication date: February 17, 2011Inventors: Hemant K. Ladva, Syed Ali, Don Williamson, Mathew M. Samuel
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Publication number: 20110028357Abstract: 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: ApplicationFiled: July 29, 2009Publication date: February 3, 2011Inventors: Carlos Abad, Hemant K. Ladva, Lijun Lin, Yiyan Chen
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Patent number: 7779915Abstract: 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: GrantFiled: June 13, 2008Date of Patent: August 24, 2010Assignee: Schlumberger Technology CorporationInventors: Richard D. Hutchins, Hemant K. Ladva, Don Williamson, Sylvie Daniel
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Publication number: 20100181065Abstract: 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: ApplicationFiled: January 20, 2009Publication date: July 22, 2010Inventors: Hemant K. Ladva, Syed Ali, Mohan K.R. Panga, Richard D. Hutchins, Don Williamson
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Patent number: 7703521Abstract: 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: GrantFiled: January 14, 2009Date of Patent: April 27, 2010Assignee: Schlumberger Technology CorporationInventors: Philip F. Sullivan, Gary John Tustin, Don Williamson, Hemant K. Ladva
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Publication number: 20090205824Abstract: 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: ApplicationFiled: January 14, 2009Publication date: August 20, 2009Inventors: Philip F. Sullivan, Gary John Tustin, Don Williamson, Hemant K. Ladva
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Publication number: 20080289828Abstract: 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: ApplicationFiled: June 13, 2008Publication date: November 27, 2008Inventors: Richard D. Hutchins, Hemant K. Ladva, Don Williamson, Sylvie Daniel