Abstract: A process for producing a purified synthesis gas stream from a feed synthesis gas stream comprising besides the main constituents carbon monoxide and hydrogen also hydrogen sulphide, HCN and/or COS, the process comprising the steps of: (a) removing HCN and/or COS by contacting the feed synthesis gas stream with a catalyst in a HCN/COS reactor in the presence of steam/water, to obtain a synthesis gas stream depleted in HCN and/or in COS; (b) converting hydrogen sulphide in the synthesis gas stream depleted in HCN and/or in COS to elemental sulphur, by contacting the synthesis gas stream with an aqueous reactant solution containing solubilized Fe(III) chelate of an organic acid, at a temperature below the melting point of sulphur, and at a sufficient solution to gas ratio and conditions effective to convert H2S to sulphur and inhibit sulphur deposition, to obtain a synthesis gas stream depleted in hydrogen sulphide; (c) removing carbon dioxide from the synthesis gas stream depleted in hydrogen sulphide, to obta
Type:
Grant
Filed:
March 30, 2010
Date of Patent:
March 24, 2015
Assignee:
Shell Oil Company
Inventors:
Robert Van Den Berg, Matthieu Simon Henri Fleys, Mark Jan Prins, Cornelis Jacobus Smit, Alex Frederik Woldhuis
Abstract: A silicate gel composition that is useful for sealing the face of a fracture of a formation. A method of sealing a face of a fracture of a formation with the silicate gel composition and diverting an acid treatment fluid.
Type:
Grant
Filed:
February 7, 2014
Date of Patent:
March 17, 2015
Assignee:
Saudi Arabian Oil Company
Inventors:
Saleh Haif Al-Mutairi, Ali Dahmal Al-Aamri, Khalid A. Al-Dossary, Mubarak Auodah Al-Dhufairi
Abstract: Methods are provided for treating a portion of a well. The method according to this aspect comprises the steps of: (A) forming a treatment fluid, the treatment fluid comprising: (i) water; (ii) a water-soluble polymer; (iii) a complexed metal cation that: (a) has a valence state of at least three; and (b) is capable of cross-linking the water-soluble polymer; and (iv) an aromatic compound that is capable of dissolving, melting, or chemically decomposing, dissociating, or reacting, to form a chelating agent, wherein the chelating agent comprising vicinal substituents containing donor heteroatoms, and wherein the chelating agent is capable of chelating the metal cation; and (B) introducing the treatment fluid into the well.
Type:
Grant
Filed:
June 23, 2009
Date of Patent:
March 10, 2015
Assignee:
Halliburton Energy Services, Inc.
Inventors:
B. Raghava Reddy, Rajesh K. Saini, Sherry G. Gaskins
Abstract: The present invention relates to glycerol based drilling fluids. In particular, the invention relates to drilling fluids comprising a 95-20 volume % glycerol/water solution capable of stabilizing water-sensitive formations during drilling and the use of such solutions for drilling a well having water-sensitive formations.
Abstract: A system and method of treating a fluid to be used for hydraulic fracturing adds an effective amount of chlorine dioxide to the fluid to act as a biocide that kills harmful bacteria. A system for adding chlorine dioxide to the fluid can continuously add chlorine dioxide to an incoming flow of the fluid to produce a continuous flow of treated fluid.
Abstract: Methods and systems are disclosed for well completion and/or production, where an aggregating, agglomerating or conglomerating composition is injected into a producible formation, zone or interval thereof to alter an aggregation or zeta potential of formation surfaces and particulate to increase a maximum sand free production rate.
Type:
Grant
Filed:
January 20, 2010
Date of Patent:
February 10, 2015
Assignee:
Weatherford Technology Holding LLC
Inventors:
Ronald van Petegem, Sarkis R. Kakadjian, Frank Zamora
Abstract: Methods are disclosed for improved sand control, fines control, load recovery and well productivity, where the compositions comprise reaction products of an amine and a phosphate-containing compound.
Type:
Grant
Filed:
May 12, 2009
Date of Patent:
February 3, 2015
Assignee:
Clearwater International LLC
Inventors:
Frank Zamora, Sarkis R. Kakadjian, Erin Fitzgerald, Tina Garza
Abstract: The current invention is directed to a method of protecting UV or visible light sensitive drugs from the effects of UV or visible radiation used to form covalent bonds between a biobeneficial material and the outermost surface of an implantable medical device in order to lessen the foreign body response to the device.
Abstract: Chemical compounds that are N-acyl amino acids or derivatives thereof having long chain N-acyl groups were found to have oil-releasing activity. Solutions containing these compounds may be introduced into oil reservoirs or onto oil-contaminated surface sites to release oil from oil-coated surfaces. The released oil may be recovered for further processing or waste disposal.
Abstract: Chemical compounds that are N-lauroyl amino acids containing a polyethylene oxide segment were found to have oil-releasing activity. Solutions containing these compounds may be introduced into oil reservoirs or onto oil-contaminated surface sites to release oil from oil-coated surfaces. The released oil may be recovered for further processing or waste disposal.
Type:
Grant
Filed:
March 29, 2012
Date of Patent:
January 27, 2015
Assignee:
E I du Pont de Nemours and Company
Inventors:
Michael P. Perry, Christina S. Stauffer
Abstract: Methods relate to using phosphate and/or nitrate brines to reduce hydrate formation in flowlines under conditions conducive for hydrate formation in the absence of the phosphate and/or nitrate brine. The phosphate and/or nitrate brines may include compatible anti-corrosion additives.
Type:
Grant
Filed:
January 11, 2012
Date of Patent:
January 13, 2015
Assignee:
Clearwater International L.L.C.
Inventors:
Olusegun Matthew Falana, Michael Morrow, Frank G. Zamora
Abstract: Esters of alkanolamines with unsaturated, polyunsaturated or saturated C8-C36 monocarboxylic acids are additives for reducing accretion on drilling equipment (anti-accretion agents) to be used in drilling muds during drilling and completion of oil and gas wells.
Type:
Grant
Filed:
May 18, 2009
Date of Patent:
January 13, 2015
Assignee:
Lamberti SpA
Inventors:
Luigi Merli, Jacopo Franchini, Pierangelo Pirovano, Mattia Ossola, Franco Federici, Dario Fornara, Giuseppe Li Bassi
Abstract: Methods of preventing precipitation of calcium citrate and iron-based scale during acidizing treatments and related compositions are provided as embodiments of the present invention. The acidizing treatment fluid includes citric acid and tetra-salts of EDTA.
Abstract: A method of preparing and using a drag-reducing composition in a well treatment operation includes the step of preparing the drag-reducing composition by mixing a polymer emulsion that includes a first surfactant and a first solvent, with a second surfactant and a second solvent. The method continues with the step of combining the drag-reducing composition with an aqueous treatment fluid. The method further includes the step of injecting the drag-reducing composition and aqueous treatment fluid into a subterranean formation, a pipeline or a gathering line.
Type:
Grant
Filed:
October 14, 2011
Date of Patent:
December 23, 2014
Assignee:
CESI Chemical, Inc.
Inventors:
Earl Parnell, Todd Sanner, Marlin Holtmyer, David Philpot, Andrei Zelenev, Gydeon Gilzow, Lakia Champagne, Thomas Sifferman
Abstract: A method for drilling formations below the bottom of a body of water include mixing a selected amount of hagfish slime with water and drilling the formations using the slime-water mixture as a circulating drilling fluid.
Abstract: A binder is described which comprises A) a hydrolysate or heterocondensate of at least one hydrolysable silicon compound and at least one metal, phosphorus or boron compound, the metal being selected from Al, Ge, Sn, Pb, Ti, Mg, Li, V, Nb, Ta, Zr and Hf, B) an organic polymerizable or polycondensable monomer or oligomer and C) a buffer, so that the pH of the buffered binder is in the range from 2 to 7, and optionally a complexing agent, if appropriate, the at least one hydrolysable silicon compound comprising one or more hydrolysable silicon compounds having at least one nonhydrolysable group or oligomers thereof. The binder is suitable for consolidating bulk or loose substrates.
Type:
Grant
Filed:
February 26, 2009
Date of Patent:
December 2, 2014
Assignee:
EPG (Engineered Nanoproducts Germany) AG
Abstract: The present invention relates to an ionic liquid-polymer gel membrane with improved gas permeability, and a preparation method thereof, and more specifically, to a membrane prepared to allow an ionic liquid to be dispersed in a polymer gel, thereby improving gas permeability. Particularly, the present invention relates to an ionic liquid-polymer gel membrane wherein membrane selectivity and permeability exceed an upper bound by increasing the amount of dispersed ionic liquid, and a preparation method thereof. The preparation method of the membrane for separating a specific gas from a mixture gas according to the present invention comprises the following steps of: mixing a polymer, an ionic liquid and PC as a solvent to prepare a mixture solution; and drying the mixture solution to remove the solvent from the mixture solution. In addition, the polymer is polyvinylidene fluoride-hexafluoropropyl copolymer (PVdF-HFP), and the ionic liquid is 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF4]).
Type:
Grant
Filed:
March 23, 2010
Date of Patent:
November 11, 2014
Assignee:
Korea Institute of Energy Research
Inventors:
Il Hyun Baek, Sung Chan Nam, Jung Hoon Park, Yeo Il Yoon, Sang Do Park
Abstract: The invention relates to a method for producing at least one compound having at least one at least monosubstituted amino group. According to the invention, a starting substance having at least one amino group is reacted with an alcohol in a reaction mixture in the presence of ammonia.
Type:
Grant
Filed:
March 27, 2009
Date of Patent:
October 28, 2014
Assignee:
Borealis Agrolinz Melamine GmbH
Inventors:
Rene Dicke, Andreas Endesfleder, Martin Burger, Christoph Hahn, Clemens Schwarzinger, Wolfgang Fuerst, Harald Schmidt
Abstract: A drag-reducing additive includes 40-85% by weight of a polymer emulsion that includes a polymer, a first surfactant, and a first solvent; 10-35% by weight of a second surfactant with an HLB greater than 8; and 5-30% by weight of a second solvent. In a preferred embodiment, the second solvent includes a terpene. In another preferred embodiment, the polymer is a copolymer that includes acrylamide and acrylic acid.
Type:
Grant
Filed:
November 10, 2008
Date of Patent:
October 21, 2014
Assignee:
CESI Chemical, Inc.
Inventors:
Earl Parnell, Todd Sanner, Marlin Holtmyer, David Philpot, Andrei Zelenev, Gydeon Gilzow, Lakia Champagne, Thomas Sifferman
Abstract: Drilling, drill-in and completion fluids containing nanoparticles for use in hydrocarbon drilling and recovery processes and methods related thereto are provided. The fluids also include a dual acting shield agent that shields the nanoparticles and also acts as a viscosifier. The fluids can be used in various types of hydrocarbon drilling and recovery processes, such as drilling, drill in, completion, and the like.