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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Publication number: 20090211335Abstract: Solids deposition in a gas environment, such as a gas transmission line or pipeline are measured using metal-coated quartz crystal microbalance (QCM) in a QCM probe within a high pressure gas chamber in the gas environment. The metal coated on the QCM may be iron, iron alloys and/or iron oxide. The weight measurements are conducted at a constant (?T) or controlled (T=f(t)) temperature between the high pressure gas chamber and the QCM probe. The weight gain during a CE cycle is associated with the solids formation rate.Type: ApplicationFiled: February 26, 2009Publication date: August 27, 2009Applicant: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Sunder Ramachandran, Paul Hammonds
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Publication number: 20090184003Abstract: A localized corrosion monitoring (LCM) device is modified to obtain polarization resistance (Rp) from electrical resistance of a probe having a strip of metal under investigation (test electrode), a reference electrode and a temperature sensor (e.g. thermocouple). This configuration allows the probe to be used in areas where only a thin film of conductive fluid is available or required to provide potential monitoring. Thus, the applicability of the LCM technique is broadened. All the above devices are expected to be configured in one item of equipment, except for the probe which may be remotely located from the rest of the equipment.Type: ApplicationFiled: January 21, 2009Publication date: July 23, 2009Applicant: Baker Hughes IncorporatedInventors: Paul Hammonds, Vladimir Jovancicevic
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Publication number: 20090181867Abstract: Imidazoline dimer-type compounds which are prepared by the reaction of dimer fatty acid and a dialkylene triamine, such as diethylenetriamine (DETA), are useful for corrosion inhibition in water-containing fluids contacting metal, particularly fluids containing CO2 and/or H2S. When the reaction is conducted with molar excess of the polyamine, the resulting imidazoline dimer or oligomer is surprisingly more effective at corrosion inhibition than conventional monomeric imidazoline. Also unexpected is the better water solubility of the reaction product as compared with the conventional monomeric imidazoline.Type: ApplicationFiled: January 10, 2008Publication date: July 16, 2009Applicant: BAKER HUGHES INCORPORATEDInventors: Jiang Yang, Vladimir Jovancicevic
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Patent number: 7483152Abstract: The process involves first taking height measurements of a surface area at a relatively high resolution, such as 0.1 microns over a range of about 100 microns, of a particular surface area of a substrate prior to any corrosive effect on the substrate. This measurement or scan gives a first digital surface map. The substrate is then subjected to a corrosive environment. The same surface area is then measured with the same height resolution to give a second map, where the height of the surface area may be diminished or reduced in local areas or pits characteristic of localized corrosion. The two surface maps are subtracted to give a measurement of the extent of localized corrosion. The two surface maps may be subtracted electronically or digitally. This method may be accomplished over a relatively short time period, e.g. hours, as compared with conventional corrosion evaluation techniques.Type: GrantFiled: February 23, 2005Date of Patent: January 27, 2009Assignee: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Samuel Everett Campbell
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Publication number: 20080283418Abstract: An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient.Type: ApplicationFiled: May 6, 2008Publication date: November 20, 2008Applicant: BAKER HUGHES INCORPORATEDInventors: Vladimir Jovancicevic, Carlos M. Menendez, Paul Hammonds, Wai Yeung Mok
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Patent number: 7368050Abstract: The invention provides an electrochemical noise method, apparatus and system for estimating parameters of interest related to corrosion rates of an electrically conductive article, the method comprising: placing a working electrode, a reference electrode, and a counter electrode in an environment of interest; measuring potential at open circuit between the working electrode and the reference electrode over time; placing the working electrode under a potentiostatic control; measuring current between the working electrode and the counter electrode for a predetermined period of time, the period of time of measurements may be extended to include a transient event; and estimating the corrosion rate.Type: GrantFiled: March 21, 2005Date of Patent: May 6, 2008Assignee: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Wai Yeung Mok, Carlos M. Menendez, Paul Hammonds
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Publication number: 20080047614Abstract: An apparatus for reducing drag in a fluid stream involves admixing the components of a drag reducer to form an incipient drag reducer and injecting the incipient drag reducer into the fluid stream wherein the drag reducer components are admixed at the site of the fluid stream.Type: ApplicationFiled: October 29, 2007Publication date: February 28, 2008Applicant: BAKER HUGHES INCORPORATEDInventors: Paul Hammonds, Vladimir Jovancicevic, C. Means, David Green
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Patent number: 7288506Abstract: Aluminum carboxylate drag reducing agents are described herein. These materials are useful to reduce drag in hydrocarbon fluids and multiphase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream. The drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated, or undesirable foaming. In one non-limiting embodiment, an aluminum monocarboxylate is reacted with at least one carboxylic acid in situ. In another non-limiting embodiment, the aluminum carboxylate is introduced as a dispersion in a solvent such as paraffin oil. The drag reducing additives include aluminum dicarboxylates such as aluminum dioctoate, aluminum distearate, aluminum octoateoleate, aluminum octoatestearate, aluminum stearateoleate, hydroxyaluminum bis(2-ethylhexanoate) and mixtures thereof.Type: GrantFiled: November 24, 2003Date of Patent: October 30, 2007Assignee: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Samuel Campbell, Sunder Ramachandran, Paul Hammonds, Steven J. Weghorn
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Patent number: 7287540Abstract: Disclosed is a method of reducing drag in a fluid stream. The method includes admixing the components of a drag reducer to form an incipient drag reducer and injecting the incipient drag reducer into the fluid stream wherein the drag reducer components are admixed at the site of the fluid stream.Type: GrantFiled: February 27, 2004Date of Patent: October 30, 2007Assignee: Baker Hughes IncorporatedInventors: Paul Hammonds, Vladimir Jovancicevic, C. Mitch Means, David Green
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Publication number: 20070079963Abstract: A composition of a wet hydrocarbon foaming agent including a siloxane can foam wet hydrocarbons. The siloxane wet hydrocarbon foaming agent advantageously foams hydrocarbons that have as little as 5 percent water present and those hydrocarbons having as much as 90 percent water present. The wet hydrocarbon foaming agent can be used in oil and gas production for gas lift and foam blocking applications. The foaming agent can also be used for clearing hydrocarbons from pipelines and other vessels used for transporting oil and gas.Type: ApplicationFiled: September 8, 2006Publication date: April 12, 2007Applicant: Baker Hughes IncorporatedInventors: Jiang Yang, Vladimir Jovancicevic, Mark Caskie
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Publication number: 20070039646Abstract: Non-polymeric drag reducing agents in the form of maleated fatty acids and the esters thereof and the organic, inorganic or amine salts thereof are described herein. These additives are useful to reduce drag in hydrocarbon fluids and multiphase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream, nor is grinding (cryogenic or otherwise) of the additive necessary to form a suitable drag reducing agent. The drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated, or undesirable foaming.Type: ApplicationFiled: October 25, 2006Publication date: February 22, 2007Inventors: Vladimir Jovancicevic, Young Ahn
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Publication number: 20070017822Abstract: Simultaneous determination of general corrosion and localized corrosion rate measurements is achieved with polarization applied by the electrodes themselves rather than externally applied polarization. Two or more working electrodes may be galvanically coupled. A localized pitting corrosion event on one of the electrodes will lead to a potential transient. The area within the potential transient is measured with the baseline being the initial starting potential. This gives localized corrosion as a function of time. The relationship Rp=?V/?I is calculated, where Rp is the polarization resistance of the working electrodes and is a measure of generalized corrosion rate.Type: ApplicationFiled: August 4, 2006Publication date: January 25, 2007Applicant: Baker Hughes IncorporatedInventors: Raymond Gill, Vladimir Jovancicevic, Wai Mok, Paul Hammonds
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Patent number: 7137401Abstract: Non-polymeric drag reducing agents in the form of maleated fatty acids and the esters thereof and the organic, inorganic or amine salts thereof are described herein. These additives are useful to reduce drag in hydrocarbon fluids and multi-phase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream, nor is grinding (cryogenic or otherwise) of the additive necessary to form a suitable drag reducing agent. The drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated, or undesirable foaming.Type: GrantFiled: August 30, 2001Date of Patent: November 21, 2006Assignee: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Young Soo Ahn
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Publication number: 20060166835Abstract: Useful microemulsions have corrosion inhibitors in the internal phase and an external phase and at least one surfactant that helps define the emulsion. The corrosion inhibitor itself may have its pH adjusted so that it also serves the role of surfactant. The corrosion inhibitors form microemulsions with particle or droplet diameters of about 10 to about 300 nm. The microemulsions may be oil-in-water, water-in-oil or bi-continuous.Type: ApplicationFiled: January 18, 2006Publication date: July 27, 2006Inventors: Jiang Yang, Vladimir Jovancicevic
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Publication number: 20060144719Abstract: An electrochemical noise method, apparatus and system calculates parameters of interest related to corrosion rates of an electrically conductive article. The method involves placing a test electrode, a reference electrode, and an auxiliary electrode in an environment of interest; placing the test electrode under potentiostatic control regime for a potential scan; measuring the relationship of current v. potential (polarization resistance, Rp) of the test electrode relative to the reference electrode during a first period; switching from potentiostatic control to the open circuit potential (OCP) of the test electrode; monitoring the OCP of the test electrode during a second period; determining ?I from the relationship Rp=?V/?I, where ?V is measured over a second period of time; and calculating the localized corrosion from the measured potential and current data.Type: ApplicationFiled: October 31, 2005Publication date: July 6, 2006Applicant: Baker Hughes IncorporatedInventors: Raymond Gill, Vladimir Jovancicevic, Wai Mok, Paul Hammonds
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Publication number: 20050213430Abstract: The process involves first taking height measurements of a surface area at a relatively high resolution, such as 0.1 microns over a range of about 100 microns, of a particular surface area of a substrate prior to any corrosive effect on the substrate. This measurement or scan gives a first digital surface map. The substrate is then subjected to a corrosive environment. The same surface area is then measured with the same height resolution to give a second map, where the height of the surface area may be diminished or reduced in local areas or pits characteristic of localized corrosion. The two surface maps are subtracted to give a measurement of the extent of localized corrosion. The two surface maps may be subtracted electronically or digitally. This method may be accomplished over a relatively short time period, e.g. hours, as compared with conventional corrosion evaluation techniques.Type: ApplicationFiled: February 23, 2005Publication date: September 29, 2005Inventors: Vladimir Jovancicevic, Samuel Campbell
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Publication number: 20050211570Abstract: The invention provides an electrochemical noise method, apparatus and system for estimating parameters of interest related to corrosion rates of an electrically conductive article, the method comprising: placing a working electrode, a reference electrode, and a counter electrode in an environment of interest; measuring potential at open circuit between the working electrode and the reference electrode over time; placing the working electrode under a potentiostatic control; measuring current between the working electrode and the counter electrode for a predetermined period of time, the period of time of measurements may be extended to include a transient event; and estimating the corrosion rate.Type: ApplicationFiled: March 21, 2005Publication date: September 29, 2005Applicant: Baker Hughes IncorporatedInventors: Vladimir Jovancicevic, Wai Mok, Carlos Menendez, Paul Hammonds
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Publication number: 20050049327Abstract: A process for using high molecular weight, anionic, hydrophilic polymers without formation of deleterious emulsions to facilitate flow in multiphase pipelines containing both oil and water (e.g., oil/water, oil/water/gas, oil/water/solids, and oil/water/gas/solids) such as are used for oil or gas production, gathering, and transmission; hydrotransport of oilsand or heavy oil slurries is described. Specific examples of suitable drag reducing polymers include anionic, hydrophilic polyacrylamides having a molecular weight of greater than 1 megadalton.Type: ApplicationFiled: August 26, 2004Publication date: March 3, 2005Inventors: Vladimir Jovancicevic, Steven Weghorn, Paul Hart
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Publication number: 20040216780Abstract: Disclosed is a method of reducing drag in a fluid stream. The method includes admixing the components of a drag reducer to form an incipient drag reducer and injecting the incipient drag reducer into the fluid stream wherein the drag reducer components are admixed at the site of the fluid stream.Type: ApplicationFiled: February 27, 2004Publication date: November 4, 2004Applicant: Baker Hughes IncorporatedInventors: Paul Hammonds, Vladimir Jovancicevic, C. Mitch Means, David Green
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Publication number: 20040206937Abstract: Drag reducers having the formula: 1Type: ApplicationFiled: November 26, 2003Publication date: October 21, 2004Inventors: Bernardus Antonius Maria Oude Alink, Vladimir Jovancicevic