Halliburton Energy Services, Inc.

University of Arkansas

University of Kansas

Anindya Ghosh

B Raghava Reddy

Russell M Fitzgerald

Bijay P Chhetri

Andrew L Brandt

Charlette Parnell

Michael Linley Fripp

Larry Steven Eoff

Rajesh Kumar Saini

Ashok K Santra

Luke William Holderman

Bala Subramaniam

Antonio Recio, Iii

Lewis R Norman

Hong Jin

Christopher Austin Lewis

Bobby E Hall

Haoyue Zhang

Samuel L Collom

Jon Tunge

Shane Z Sullivan

Sharon Pulla

Deborah Fripp

Jon A Tunge

A method for C&#x2014;H bond activation and/or C&#x2014;N coupling reaction comprises adding a hydrocarbon material to a container; adding a metal catalyst to the container; adding a primary or a secondary amine to the container. The metal catalyst is represented by the following formula: where Q is a 5 or 6 membered aromatic ring; W, X, and Y are the same or different, and are independently N, S, P, or O; M is Ni, Pd, Fe, Co, Cr, Mn, Cu, Pt, Ir, or Ru; Z is halide (F, Cl, Br, or I); R1 and R2 are the same or different, and are independently alkyl, aryl, alkylaryl or cycloalkyl; and n is 1, 2, or 3.

Metal catalyst, method of C-N coupling using the same and applications of the same

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous/heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.

Doped carbonaceous materials for photocatalytic removal of pollutants under visible light, making methods and applications of same

A method for C&#x2014;H bond activation and/or C&#x2014;N coupling reaction comprises using a metal catalyst to catalyze the C&#x2014;H bond activation and/or C&#x2014;N coupling reaction; wherein the metal catalyst represented by the following formula a metal catalyst for C&#x2014;H bond activation and/or C&#x2014;N coupling reaction, and a method using the same and application thereof. Specifically, a metal catalyst represented by the following formula: wherein

Metal catalyst, method of C&#x2014;N coupling using the same and applications of the same

Methods including deactivation and activation of permeability modifiers for use in subterranean formation operations. A first treatment fluid may be introduced into a subterranean formation having a first treatment zone having a first aqueous permeability value, the first treatment fluid comprising a first aqueous base fluid and a deactivated permeability modifier. The deactivated permeability modifier may be adsorbed onto a surface of the first treatment zone. A second treatment may thereafter be introduced into the subterranean formation, the second treatment fluid comprising a second aqueous base fluid and a cyclodextrin compound. The second treatment fluid may contact the deactivated permeability modifier to activate the permeability modifier by complexing the deactivating surfactant with the cyclodextrin compound, thereby forming an activated permeability modifier adsorbed onto the surface of the first treatment zone and reducing the aqueous permeability of the first treatment zone.

Deactivation and activation of permeability modifiers for use in subterranean formation operations

A tetradendate amide based macrocyclic ligand and its Fe(III) complex which act as activators of hydrogen peroxide. The synthetic methodology to develop the ligands is new, simple and provides better yield for each step of the ligand synthesis. The Fe(III)-complexes and hydrogen peroxide together are can perform several environmentally benign oxidation reactions. Organic dye bleaching, bleaching of pulp and paper effluent and N-oxide synthesis may be performed using the newly developed catalyst and hydrogen peroxide. Alcohol oxidation and alkene epoxidation may also be performed using the catalysts and hydrogen peroxide.

Method of synthesis of tetradentate amide macrocycle ligand and its metal-complex

A composition comprising a carboxylated, sulfonated polysaccharide and a wellbore servicing fluid. A wellbore servicing composition comprising a hydraulic cement and a carboxylated, sulfonated polysaccharide. A wellbore servicing composition comprising a polysaccharide having carboxylate and sulfonate groups.

Polysaccharide based cement additives

A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition comprising a polysaccharide having carboxylate and sulfonate groups. A method of servicing a wellbore comprising preparing at the well site an additive composition comprising a polysaccharide having carboxylate and sulfonate groups, introducing the additive composition into a wellbore servicing fluid, and placing the wellbore servicing fluid into a subterranean formation. A method of preparing a wellbore servicing fluid comprising contacting a polysaccharide composition with an oxidizing agent to form an oxidized polysaccharide, and contacting the oxidized polysaccharide with a sulfonating agent to form a carboxylated sulfonated polysaccharide, and contacting the carboxylated sulfonated polysaccharide with a wellbore servicing fluid.

Methods of using polysaccharide based cement additives

The present invention provides treatment fluids useful for subterranean operations, and more particularly, in at least one aspect, a treatment fluid that comprises a carrier fluid and a cationic surfactant comprising a cationic head group, a polar group attached to the head group, and a hydrophobic group that is either a saturated or unsaturated, branched or straight chain alkyl, and comprises about 6 carbons to about 22 carbons. The treatment fluids of the present invention are at least suitable for use as a remedial treatment for the reduction of existing water blocks, oil blocks, and/or gas condensates.

Treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods

A well system having a galvanic time release plug. A well system includes a flow passage and a flow blocking device which selectively obstructs flow through the passage, the device including an electrode in a galvanic cell. A flow blocking device for use in conjunction with a subterranean well includes a portion which delays an electrochemical reaction in a galvanic cell. A method of controlling fluid flow in a well system includes the steps of: obstructing flow through a passage using a flow blocking device which includes an electrode of a galvanic cell; and increasing flow through the passage by operation of the galvanic cell.

Well system having galvanic time release plug

An improved hydroformylation process is provided, which comprises reacting an olefin with CO and Hin the presence of a hydroformylation catalyst in a liquid that has been volumetrically expanded with a compressed gas, such as supercritical carbon dioxide.

Growing community of inventors

Little Rock, AR, United States of America

Anindya Ghosh