Patents by Inventor Vladimir Jovancicevic
Vladimir Jovancicevic 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: 11313218Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.Type: GrantFiled: February 2, 2017Date of Patent: April 26, 2022Assignee: SAUDI ARABIAN OIL COMPANYInventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
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Patent number: 11091998Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.Type: GrantFiled: December 13, 2018Date of Patent: August 17, 2021Assignee: SAUDI ARABIAN OIL COMPANYInventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
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Publication number: 20190112911Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.Type: ApplicationFiled: December 13, 2018Publication date: April 18, 2019Applicant: Saudi Arabian Oil CompanyInventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
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Publication number: 20170306247Abstract: Hydrogen sulfide (H2S) and/or mercaptan scavengers are chemicals that remove H2S and/or mercaptans from gas, oil and water. Water-based formulations may be made and used employing scavenging compounds having the formulae: wherein each R1, R2, R3, and R4 are the same or different and are selected from the group consisting of hydrogen, an alkyl, an alkenyl, an aryl, an acyl, a halogen, a hydroxyl, a nitro, an alkyl ester, an aryl ester, an alkyl ether, an aryl ether, a hydroxymethyl, an anhydride group, an amino, and a sulfide. In one non-limiting embodiment the compounds (A) and (B) do not contain nitrogen atoms. Water-based formulations, such as those using a protic solvent with the above compounds, work well as H2S scavengers.Type: ApplicationFiled: July 8, 2017Publication date: October 26, 2017Applicant: Baker Hughes, a GE company, LLCInventors: Sunder Ramachandran, Vladimir Jovancicevic, Ying H. Tsang, Michael P. Squicciarini, Philippe Prince, Jianzhong Yang, Kyle C. Cattanach
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Publication number: 20170226843Abstract: A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.Type: ApplicationFiled: February 2, 2017Publication date: August 10, 2017Inventors: Vladimir Jovancicevic, Sunder Ramachandran, Amro Mukhles, Irfan Syafii
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Patent number: 9726594Abstract: An under-deposit corrosion (UDC) sensor includes a probe body with a curved concave probe surface that may have pre-deposited or in-situ formed thereon a material that accelerates the process of under deposit corrosion. The UDC sensor uses electrochemically-based localized monitoring techniques for assessing under-deposit pitting corrosion and the effectiveness of chemical treatment programs that mitigate under-deposit corrosion in well tubing, pipelines, vessels, and/or tanks.Type: GrantFiled: November 18, 2014Date of Patent: August 8, 2017Assignee: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Sunder Ramachandran, Carlos M. Menendez
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Patent number: 9708547Abstract: Hydrogen sulfide (H2S) and/or mercaptan scavengers are chemicals that remove H2S and/or mercaptans from gas, oil and water. Water-based formulations may be made and used employing scavenging compounds having the formulae: wherein each R1, R2, R3, and R4 are the same or different and are selected from the group consisting of hydrogen, an alkyl, an alkenyl, an aryl, an acyl, a halogen, a hydroxyl, a nitro, an alkyl ester, an aryl ester, an alkyl ether, an aryl ether, a hydroxymethyl, an anhydride group, an amino, and a sulfide. In one non-limiting embodiment the compounds (A) and (B) do not contain nitrogen atoms. Water-based formulations, such as those using a protic solvent with the above compounds, work well as H2S scavengers.Type: GrantFiled: June 29, 2011Date of Patent: July 18, 2017Assignee: Baker Hughes IncorporatedInventors: Sunder Ramachandran, Vladimir Jovancicevic, Ying H. Tsang, Michael P. Squicciarini, Philippe Prince, Jianzhong Yang, Kyle C. Cattanach
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Patent number: 9587181Abstract: The use of a composition including a transition metal salt and at least one water-soluble aldehyde or water-soluble aldehyde precursor scavenges H2S that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over the case where each component is used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of a water-soluble aldehyde or water-soluble aldehyde precursor is ethylene glycol hemiformal.Type: GrantFiled: January 7, 2014Date of Patent: March 7, 2017Assignee: BAKER HUGHES INCORPORATEDInventors: Scott E. Lehrer, Vladimir Jovancicevic, Sunder Ramachandran
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Patent number: 9480946Abstract: A transition metal carboxylate scavenger may be used to scavenge contaminants from systems from mixed production and/or gas, either dry or wet hydrocarbon gas. The contaminants scavenged or otherwise removed may include, but are not necessarily limited to, H2S, mercaptans, sulfides, and combinations thereof. Suitable transition metal carboxylates in the scavenger include, but are not limited to, zinc octoate, zinc dodecanoate, zinc naphthenate, and combinations thereof.Type: GrantFiled: March 21, 2014Date of Patent: November 1, 2016Assignee: BAKER HUGHES INCORPORATEDInventors: Sunder Ramachandran, Scott E. Lehrer, Vladimir Jovancicevic
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Patent number: 9463989Abstract: The use of a dialdehyde (e.g. glyoxal) and a nitrogen-containing scavenger (e.g. a triazine) when injected separately in media containing hydrogen sulfide (H2S) and/or mercaptans to scavenge H2S and/or mercaptans therefrom gives a synergistically better reaction rate and overall scavenging efficiency, i.e. capacity, over the use of the dialdehyde or the nitrogen-containing scavenger used alone, but in the same total amount of the dialdehyde and nitrogen-containing scavenger. The media may include an aqueous phase, a gas phase, a hydrocarbon phase and mixtures of a gas and/or hydrocarbon phase with an aqueous phase.Type: GrantFiled: June 20, 2012Date of Patent: October 11, 2016Assignee: BAKER HUGHES INCORPORATEDInventors: Carlos M. Menendez, Vladimir Jovancicevic, Sunder Ramachandran
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Publication number: 20160139030Abstract: An under-deposit corrosion (UDC) sensor includes a probe body with a curved concave probe surface that may have pre-deposited or in-situ formed thereon a material that accelerates the process of under deposit corrosion. The UDC sensor uses electrochemically-based localized monitoring techniques for assessing under-deposit pitting corrosion and the effectiveness of chemical treatment programs that mitigate under-deposit corrosion in well tubing, pipelines, vessels, and/or tanks.Type: ApplicationFiled: November 18, 2014Publication date: May 19, 2016Applicant: BAKER HUGHES INCORPORATEDInventors: VLADIMIR JOVANCICEVIC, SUNDER RAMACHANDRAN, CARLOS M. MENENDEZ
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Patent number: 9278307Abstract: The use of a composition that includes a metal salt and an oil soluble amine formaldehyde reaction product scavenges H2S that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over each component when used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of an oil soluble amine formaldehyde reaction product is the reaction product of dibutylamine with formaldehyde.Type: GrantFiled: May 22, 2013Date of Patent: March 8, 2016Assignee: BAKER HUGHES INCORPORATEDInventors: Scott E. Lehrer, Sunder Ramachandran, Vladimir Jovancicevic
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Patent number: 9260669Abstract: The use of neutral aqueous solutions of glyoxal (pH approximately 6 to 8.5) scavenges H2S that is present in natural gas and in oil better than glyoxal alone or base alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over glyoxal used alone. A buffer may be optionally used. In another embodiment, the combination of non-nitrogen-containing surfactants and glyoxal results in a significant increase in the reaction rate and the overall scavenging efficiency, i.e. capacity as compared to glyoxal used alone.Type: GrantFiled: February 29, 2012Date of Patent: February 16, 2016Assignee: BAKER HUGHES INCORPORATEDInventors: Sunder Ramachandran, Vladimir Jovancicevic, Kyle C. Cattanach, Michael P. Squicciarini
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Publication number: 20150267113Abstract: Corrosion inhibitor compositions containing at least one sulfur compound and/or at least one aqueous-soluble salt of a sulfur compound inhibit or prevent mild steel corrosion by an acid gas such carbon dioxide (CO2) and/or hydrogen sulfide (H2S) in oil and gas production processes. The sulfur compound may be a compound comprising at least three sulfur atoms, at least one of which is a thioether functional group. One suitable, but non-limiting, sulfur compound having at least three carbon atoms is 2,5-dimercapto-1,3,4-thiadiazole and salts thereof. The pH of the corrosion inhibitor composition may be optionally adjusted to be within about 5 to about 10 using an alkali metal hydroxide and/or an amine.Type: ApplicationFiled: March 12, 2015Publication date: September 24, 2015Applicant: BAKER HUGHES INCORPORATEDInventors: Sunder Ramachandran, Vladimir Jovancicevic
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Patent number: 9068269Abstract: Aldehydes useful as H2S sulfide scavengers may be corrosive to some metals such as steel, iron and aluminum, but the corrosive effect of the aldehydes may be mitigated by employing a corrosion inhibitor selected from the group consisting of a di-basic soluble phosphate salt, a tri-basic soluble phosphate salt, a phosphate ester, a thiophosphate ester, a thioamine, a Mannich Reaction Product, and combinations thereof.Type: GrantFiled: August 20, 2012Date of Patent: June 30, 2015Assignee: BAKER HUGHES INCORPORATEDInventors: Stephen R. Keenan, Jonathan Collins, Sunder Ramachandran, Vladimir Jovancicevic, Rose Tompkins, Grahame N. Taylor, Richard L. Martin, Michael L. Walker
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Publication number: 20140305845Abstract: A transition metal carboxylate scavenger may be used to scavenge contaminants from systems from mixed production and/or gas, either dry or wet hydrocarbon gas. The contaminants scavenged or otherwise removed may include, but are not necessarily limited to, H2S, mercaptans, sulfides, and combinations thereof. Suitable transition metal carboxylates in the scavenger include, but are not limited to, zinc octoate, zinc dodecanoate, zinc naphthenate, and combinations thereof.Type: ApplicationFiled: March 21, 2014Publication date: October 16, 2014Applicant: Baker Hughes IncorporatedInventors: Sunder Ramachandran, Scott E. Lehrer, Vladimir Jovancicevic
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Patent number: 8776901Abstract: Recovering oil and gas from subterranean oil and gas reservoirs using gas injection can serve an additional purpose of capturing and sequestering carbon dioxide. This can be accomplished where the feed gas for the gas injection is, at least in part, carbon dioxide from a carbon dioxide capture and sequestration process. Corrosion of steel in a gas transportation system due to the presence of carbon dioxide and water and oxygen may be prevented or at least mitigated by employing a corrosion inhibitor effective at preventing or mitigating steel corrosion in the presence of oxygen and carbon dioxide. The corrosion inhibitors may incorporate alkyl succinic acids, alkyl succinic anhydrides, and trimer acids.Type: GrantFiled: May 13, 2011Date of Patent: July 15, 2014Assignee: Baker Hughes IncorporatedInventors: Sunder Ramachandran, Vladimir Jovancicevic, Ksenija Babic-Samardzija, Ha M. Nguyen
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Publication number: 20140190870Abstract: The use of a composition including a transition metal salt and at least one water-soluble aldehyde or water-soluble aldehyde precursor scavenges H2S that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over the case where each component is used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of a water-soluble aldehyde or water-soluble aldehyde precursor is ethylene glycol hemiformal.Type: ApplicationFiled: January 7, 2014Publication date: July 10, 2014Applicant: Baker Hughes IncorporatedInventors: SCOTT E. LEHRER, Vladimir Jovancicevic, Sunder Ramachandran
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Patent number: 8765020Abstract: Mitigating or preventing corrosion of metal may be achieved in systems that are alkaline, such as carbon dioxide capture systems. The method may include adding an additive to a system wherein the system is at an alkaline pH; the system has both O2 and CO2 present; or the system is at an alkaline pH and has both O2 and CO2 present. The additive may be selected from the group consisting of: quaternary aromatic amines; quaternary alkyl substituted aromatic amines; and combinations thereof. The corrosion inhibiting properties of the additives may be increased by use of synergistic combinants. The abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.Type: GrantFiled: May 17, 2010Date of Patent: July 1, 2014Assignee: Baker Hughes IncorporatedInventors: Ksenija Babić-Samard{hacek over (z)}ija, Lawrence N. Kremer, David J. Poelker, Vladimir Jovancicevic, Sunder Ramachandran
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Publication number: 20130320258Abstract: The use of a composition that includes a metal salt and an oil soluble amine formaldehyde reaction product scavenges H2S that is present in aqueous fluids (e.g. produced water liquid streams), natural gas and in oil and mixtures thereof (e.g. mixed production streams that contain all three phases) better than either component when used alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over each component when used alone, in the same total amount. Non-limiting examples of the metal salt include zinc or iron carboxylates, and a non-limiting example of an oil soluble amine formaldehyde reaction product is the reaction product of dibutylamine with formaldehyde.Type: ApplicationFiled: May 22, 2013Publication date: December 5, 2013Applicant: Baker Hughes IncorporatedInventors: Scott E. Lehrer, Sunder Ramachandran, Vladimir Jovancicevic