Vladimir G Jovancicevic

6365067, Apr 2, 2002

Aug 10, 2000

09/636095

Young Soo Ahn - Missouri City TX
Vladimir Jovancicevic - Richmond TX

Baker Hughes Incorporated - Houston TX

C23F 1116

25238923, 252391, 252395, 422 7

Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.

6645399, Nov 11, 2003

Dec 17, 2001

10/023130

Young Soo Ahn - Missouri City TX
Vladimir Jovancicevic - Richmond TX

Baker Hughes Incorporated - Houston TX

C23F 1116

25238923, 252391, 252395, 422 7

Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.

6774094, Aug 10, 2004

Aug 30, 2001

09/944837

Vladimir Jovancicevic - Richmond TX
Keith A. Bartrip - Baytown TX

Baker Hughes Incorporated - Houston TX

C10M12926

508506, 508463, 508517, 508539

Non-polymeric fatty acid drag reducing agents 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. The drag reducing additives include fatty acids, alkoxylated derivatives of fatty acids, organic and inorganic salts of fatty acids and alkoxylated derivatives thereof, and esters of fatty acids and alkoxylated derivatives thereof, and mixtures thereof.

7137401, Nov 21, 2006

Aug 30, 2001

09/944835

Vladimir Jovancicevic - Richmond TX, US
Young Soo Ahn - Missouri City TX, US

Baker Hughes Incorporated - Houston TX

F17D 1/16
C09K 8/584
B01F 17/00
B01F 3/08

137 13, 516 19, 516 29, 516 73, 507136, 507137, 508221, 508232, 508240, 508269

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.

7287540, Oct 30, 2007

Feb 27, 2004

10/789515

Paul Hammonds - Katy TX, US
Vladimir Jovancicevic - Houston TX, US
C. Mitch Means - Needville TX, US
David Green - Houston TX, US

Baker Hughes Incorporated - Houston TX

F17D 1/16
G05D 11/13

137 13, 137 3, 137 8703, 13710121, 137896

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.

7288506, Oct 30, 2007

Nov 24, 2003

10/720655

Vladimir Jovancicevic - Richmond TX, US
Samuel Campbell - Richmond TX, US
Sunder Ramachandran - Sugar Land TX, US
Paul Hammonds - Katy TX, US
Steven J. Weghorn - Missouri City TX, US

Baker Hughes Incorporated - Houston TX

C10M 159/18
C10L 1/18
F17D 1/00

508506, 508537, 508539, 508579, 507267, 44358, 44362

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.

7368050, May 6, 2008

Mar 21, 2005

11/086191

Vladimir Jovancicevic - Richmond TX, US
Wai Yeung Mok - Manchester, GB
Carlos M. Menendez - Houston TX, US
Paul Hammonds - Katy TX, US

Baker Hughes Incorporated - Houston TX

G01N 17/04

2057755, 2057915, 204404

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.

7483152, Jan 27, 2009

Feb 23, 2005

11/063363

Vladimir Jovancicevic - Richmond TX, US
Samuel Everett Campbell - Richmond TX, US

Baker Hughes Incorporated - Houston TX

G01B 11/14

356614

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.