Patents by Inventor Vivekanand Sista
Vivekanand Sista 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: 10077638Abstract: A downhole tool for use in wellbores comprises a layer of hydrophobic material over a body, wherein the layer of hydrophobic material comprises a transition metal boride having a higher hydrophobicity than the body. The downhole tool may comprise a body having a composition and the layer of hydrophobic material comprising a discontinuous phase of the transition metal binder dispersed within a first continuous phase comprising a metal binder. The layer of material may be chemically bonded to the body. An interface between the body and the layer of material may comprise the transition metal boride dispersed within a second continuous phase comprising the metal binder and the composition of the body. Methods of forming downhole tools include forming such a layer of material at a surface of a body of a downhole tool.Type: GrantFiled: September 25, 2014Date of Patent: September 18, 2018Assignee: Baker Hughes IncorporatedInventors: James L. Overstreet, Vivekanand Sista, Bo Yu
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Patent number: 10060041Abstract: A method of boriding a metal comprises forming a molten electrolyte comprising between about five weight percent and about fifty weight percent boron oxide, and contacting at least a portion of a metal with the molten electrolyte. Electrical current is applied to at least a portion of the metal while maintaining a temperature of the molten electrolyte below about 700° C. to diffuse boron atoms from the molten electrolyte into a surface of the at least a portion of the metal. A downhole tool including at least one borided component is also disclosed.Type: GrantFiled: December 5, 2014Date of Patent: August 28, 2018Assignee: Baker Hughes IncorporatedInventors: Vivekanand Sista, Jimmy W. Eason
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Patent number: 9790608Abstract: A method of forming a down-hole tool comprises contacting at least a portion of at least one down-hole structure comprising at least one ceramic-metal composite material with a molten electrolyte comprising sodium tetraborate. Electrical current is applied to at least a portion of the at least one down-hole structure to form at least one borided down-hole structure comprising at least one metal boride material. Other methods of forming a down-hole tool, and a down-hole tool are also described.Type: GrantFiled: September 5, 2013Date of Patent: October 17, 2017Assignee: Baker Hughes IncorporatedInventors: Vivekanand Sista, John H. Stevens, James L. Overstreet
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Patent number: 9770805Abstract: A method of increasing a roughness of coiled tubing injector blocks that includes providing a pair of gripper blocks each having a gripper surface configured to grip coiled tubing within an injector head and increasing a first roughness on the gripping surfaces to a second roughness. A coating may be applied to the gripping surfaces to increase the roughness. The coating may be chromium carbide, molybdenum boride, iron boride, titanium boride, or a transitional metal boride. The gripping surfaces may be treated to increase the roughness to a second roughness. The gripping surfaces may be blasted by abrasives or shot peened to increase the roughness. The second roughness may be greater than 20 ?m. A system to inject coiled tubing into a wellbore may include an injector head, coiled tubing, and at least two gripper blocks having a gripping surface with a roughness of at least 20 ?m.Type: GrantFiled: October 7, 2014Date of Patent: September 26, 2017Assignee: BAKER HUGHES INCORPORATEDInventors: Silviu Livescu, Vivekanand Sista, John Delorey, Thomas J. Watkins
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Patent number: 9765441Abstract: A method of forming a downhole tool comprises contacting at least one downhole structure comprising at least one metal material with a molten electrolyte comprising anhydrous sodium tetraborate. Electrical current is applied to at least a portion of the at least one downhole structure to form at least one borided downhole structure comprising at least one metal boride material. Other methods of forming a downhole tool, and a downhole tool are also described.Type: GrantFiled: September 5, 2013Date of Patent: September 19, 2017Assignee: Baker Hughes IncorporatedInventors: Vivekanand Sista, James L. Overstreet, John H. Stevens
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Patent number: 9556531Abstract: An article of manufacture and method of forming a borided material. An electrochemical cell is used to process a substrate to deposit a plurality of borided layers on the substrate. The plurality of layers are co-deposited such that a refractory metal boride layer is disposed on a substrate and a rare earth metal boride conforming layer is disposed on the refractory metal boride layer.Type: GrantFiled: January 17, 2014Date of Patent: January 31, 2017Assignee: UChicago Argonne, LLCInventors: Ali Erdemir, Vivekanand Sista, Ozgenur Kahvecioglu, Osman Levent Eryilmaz
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Publication number: 20160160370Abstract: A method of boriding a metal comprises forming a molten electrolyte comprising between about five weight percent and about fifty weight percent boron oxide, and contacting at least a portion of a metal with the molten electrolyte. Electrical current is applied to at least a portion of the metal while maintaining a temperature of the molten electrolyte below about 700° C. to diffuse boron atoms from the molten electrolyte into a surface of the at least a portion of the metal. A downhole tool including at least one borided component is also disclosed.Type: ApplicationFiled: December 5, 2014Publication date: June 9, 2016Inventors: Vivekanand Sista, Jimmy W. Eason
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Patent number: 9358613Abstract: A composite includes a porous matrix that includes a molybdenum-silicon-boron (Mo—Si—B) alloy that has a plurality of pores with a lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof. A method for preparing a porous composite includes disposing a porous matrix comprising a Mo—Si—B alloy on a substrate, the Mo—Si—B alloy comprising a plurality of pores; disposing a lubricant on a surface of the porous matrix; and disposing a hydrophobic compound on a surface of the porous matrix to form the porous composite.Type: GrantFiled: April 8, 2013Date of Patent: June 7, 2016Assignee: BAKER HUGHES INCORPORATEDInventors: Somesh Kumar Mukherjee, Vivekanand Sista, John H. Stevens
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Publication number: 20160097244Abstract: A method of increasing a roughness of coiled tubing injector blocks that includes providing a pair of gripper blocks each having a gripper surface configured to grip coiled tubing within an injector head and increasing a first roughness on the gripping surfaces to a second roughness. A coating may be applied to the gripping surfaces to increase the roughness. The coating may be chromium carbide, molybdenum boride, iron boride, titanium boride, or a transitional metal boride. The gripping surfaces may be treated to increase the roughness to a second roughness. The gripping surfaces may be blasted by abrasives or shot peened to increase the roughness. The second roughness may be greater than 20 ?m. A system to inject coiled tubing into a wellbore may include an injector head, coiled tubing, and at least two gripper blocks having a gripping surface with a roughness of at least 20 ?m.Type: ApplicationFiled: October 7, 2014Publication date: April 7, 2016Inventors: Silviu Livescu, Vivekanand Sista, John Delorey, Thomas J. Watkins
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Publication number: 20160090824Abstract: A downhole tool for use in wellbores comprises a layer of hydrophobic material over a body, wherein the layer of hydrophobic material comprises a transition metal boride having a higher hydrophobicity than the body. The downhole tool may comprise a body having a composition and the layer of hydrophobic material comprising a discontinuous phase of the transition metal binder dispersed within a first continuous phase comprising a metal binder. The layer of material may be chemically bonded to the body. An interface between the body and the layer of material may comprise the transition metal boride dispersed within a second continuous phase comprising the metal binder and the composition of the body. Methods of forming downhole tools include forming such a layer of material at a surface of a body of a downhole tool.Type: ApplicationFiled: September 25, 2014Publication date: March 31, 2016Inventors: James L. Overstreet, Vivekanand Sista, Bo Yu
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Publication number: 20150240146Abstract: Downhole tools for use in wellbores include a layer of material over a body, wherein the layer is relatively more hydrophobic at higher temperatures and pressures, such as those encountered downhole within the wellbore, compared to the hydrophobicity at ambient conditions. For example, a downhole tool may include a body having a first composition, and a layer of material disposed at the surface of the body. The layer of material may comprise a boride or a nitride. An exposed surface of the layer of material exhibits a first relatively higher hydrophobicity at a temperature of 150° C. and a pressure of 1,300 psi, and exhibits a second relatively lower hydrophobicity at 20° C. and 14.70 psi. Methods of forming downhole tools include forming such a layer of material at a surface of a body of a downhole tool.Type: ApplicationFiled: February 21, 2014Publication date: August 27, 2015Inventors: Vivekanand Sista, Steven R. Radford, Suresh G. Patel
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Publication number: 20150203980Abstract: An article of manufacture and method of forming a borided material. An electrochemical cell is used to process a substrate to deposit a plurality of borided layers on the substrate. The plurality of layers are co-deposited such that a refractory metal boride layer is disposed on a substrate and a rare earth metal boride conforming layer is disposed on the refractory metal boride layer.Type: ApplicationFiled: January 17, 2014Publication date: July 23, 2015Applicant: Uchicago Argonne LLCInventors: Ali Erdemir, Vivekanand Sista, Ozgenur Kahvecioglu, Osman Levent Eryilmaz
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Publication number: 20150060288Abstract: A method of forming a down-hole tool comprises contacting at least a portion of at least one down-hole structure comprising at least one ceramic-metal composite material with a molten electrolyte comprising sodium tetraborate. Electrical current is applied to at least a portion of the at least one down-hole structure to form at least one borided down-hole structure comprising at least one metal boride material. Other methods of forming a down-hole tool, and a down-hole tool are also described.Type: ApplicationFiled: September 5, 2013Publication date: March 5, 2015Inventors: Vivekanand Sista, John H. Stevens, James L. Overstreet
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Publication number: 20150060051Abstract: A method of forming a downhole tool comprises contacting at least one downhole structure comprising at least one metal material with a molten electrolyte comprising anhydrous sodium tetraborate. Electrical current is applied to at least a portion of the at least one downhole structure to form at least one borided downhole structure comprising at least one metal boride material. Other methods of forming a downhole tool, and a downhole tool are also described.Type: ApplicationFiled: September 5, 2013Publication date: March 5, 2015Inventors: Vivekanand Sista, James L. Overstreet, John H. Stevens
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Publication number: 20140302305Abstract: A composite includes a porous matrix that includes a molybdenum-silicon-boron (Mo—Si—B) alloy that has a plurality of pores with a lubricant in contact with the Mo—Si—B alloy, a hydrophobic compound in contact with the Mo—Si—B alloy, or a combination thereof. A method for preparing a porous composite includes disposing a porous matrix comprising a Mo—Si—B alloy on a substrate, the Mo—Si—B alloy comprising a plurality of pores; disposing a lubricant on a surface of the porous matrix; and disposing a hydrophobic compound on a surface of the porous matrix to form the porous composite.Type: ApplicationFiled: April 8, 2013Publication date: October 9, 2014Applicant: BAKER HUGHES INCORPORATEDInventors: Somesh Kumar Mukherjee, Vivekanand Sista, John H. Stevens
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Patent number: 8066828Abstract: A method for heat treatment of steel and a system thereof is provided. First the steel is austenitized at a suitable temperature and then the temperature is rapidly brought down to the austempering temperature. Here the cyclic austempering is carried out between two austempering temperatures by modulating the temperature with controlled heating and cooling and the controlled temperature modulation is obtained by controlling the temperature-time profile in a batch furnace or by controlling the zone temperatures in a continuous furnace. This method of cyclic austempering reduces the austempering time, reduces the energy consumption and emissions, enhances the productivity and reduces the process cost.Type: GrantFiled: August 1, 2008Date of Patent: November 29, 2011Assignees: Tata Consultancy Services, Ltd., Illinois Institute of TechnologyInventors: Philip Nash, Vivekanand Sista, Satyam Sahay
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Publication number: 20090314396Abstract: A method for heat treatment of steel and a system thereof is provided. First the steel is austenitized at a suitable temperature and then the temperature is rapidly brought down to the austempering temperature. Here the cyclic austempering is carried out between two austempering temperatures by modulating the temperature with controlled heating and cooling and the controlled temperature modulation is obtained by controlling the temperature-time profile in a batch furnace or by controlling the zone temperatures in a continuous furnace. This method of cyclic austempering reduces the austempering time, reduces the energy consumption and emissions, enhances the productivity and reduces the process cost.Type: ApplicationFiled: August 1, 2008Publication date: December 24, 2009Inventors: Philip NASH, Vivekanand SISTA, Satyam Suraj SAHAY