| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 507242000 | Nitrogen is part of a hetero ring | 18 |
| 20100130389 | Compositions and Methods for Removal of Asphaltenes from a Portion of a Wellbore or Subterranean Formation Using Water-Organic Solvent Emulsion with Non-Polar and Polar Organic Solvents - Compositions are provided for removing an organic material, especially asphaltenes, from a portion of a wellbore or a subterranean formation. The composition comprises: (A) water; (B) an organic solvent blend further comprising: (i) a non-polar organic solvent; and (ii) at least two polar organic solvents; and (C) a surfactant adapted for forming an emulsion of the organic solvent blend and the water. According to another aspect of the invention, the compositions comprise: (A) water, wherein the water is greater than 25% by volume of the composition; (B) an organic solvent blend further comprising: (i) a non-polar organic solvent; and (ii) a polar organic solvent; and (C) a surfactant adapted for forming an emulsion of the organic solvent blend and the water. Methods are provided for removing an organic material from a portion of a wellbore or a subterranean formation. The method comprises the steps of: (A) forming a composition according to the invention; and (B) introducing the composition to the portion from which the organic material is to be removed. | 05-27-2010 |
| 20120295823 | OIL RELEASE WITH N-LAUROYL AMINO ACID-BASED COMPOUNDS - Chemical compounds that are N-lauroyl amino acids or derivatives thereof 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. | 11-22-2012 |
| 20140045732 | MOBILIZATION OF HEAVY OIL - A process for increasing mobility of heavy oil includes: disposing a solvating composition comprising a paraffinic solvent and a multifunctional solvent in a heavy oil environment including a heavy oil, the heavy oil comprising asphaltene; contacting the heavy oil with the solvating composition; and stabilizing asphaltene in the heavy oil with the solvating composition to increase mobility of the heavy oil and to form a stabilized heavy oil which includes the heavy oil and solvating composition. A method for making stabilized heavy oil includes separating resin from an oil; combining the resin and a paraffinic solvent to form a solvating composition; disposing the solvating composition in a heavy oil environment which includes heavy oil comprising asphaltene; and contacting the asphaltene with the solvating composition to make stabilized heavy oil, wherein the stabilized heavy oil comprises the solvating composition and heavy oil. | 02-13-2014 |
| 20150329785 | METHOD AND APPARATUS FOR GENERATING AND/OR HYDROTREATING HYDROCARBON FORMATION FLUIDS - Some embodiments relate to a method for producing, from sulfur-rich type IIs kerogen, a sweetened synthetic crude having a sulfur concentration of at most 1% wt/wt, a nitrogen concentration of at most 0.2% wt/wt and an API gravity of at least 30°. Hydrotreating is performed under only low-severity conditions of at most about 350 degrees Celsius and a maximum pressure of at most 120 atmospheres. In some embodiments, the feedstock to the hydrotreater comprises hydrocarbon pyrolysis liquids generated primarily by low temperature pyrolysis of the sulfur-rich type IIs kerogen. For example, the feedstock may be rich in easier-to-hydrotreat heterocyclic species. In some embodiments, it is possible to optimize the pyrolysis process by monitoring relative concentrations of the easier-to-hydrotreat heterocyclics and the harder-to-treat heterocyclics. | 11-19-2015 |
| 20160177170 | Corrosion Inhibitor Compositions For Acidizing Treatments | 06-23-2016 |
| 20170233636 | EMULSION OF GREEN SOLVENT AND ACID FOR SCALE REMOVAL IN IMMATURE SHALE PLAYS | 08-17-2017 |
| 507243000 | Plural heteroatoms in the ring | 12 |
| 20090131283 | IMIDAZOLINE-BASED HETEROCYCLIC FOAMERS FOR DOWNHOLE INJECTION - Disclosed are imidazoline-based foamers and corrosion inhibitors for treatment of oil and gas wells for enhanced production. The invention also includes methods of foaming a fluid by introducing the disclosed foamers to oil and gas wells. | 05-21-2009 |
| 20090149356 | ENVIRONMENTALLY FRIENDLY BIS-QUATERNARY COMPOUNDS FOR INHIBITING CORROSION AND REMOVING HYDROCARBONACEOUS DEPOSITS IN OIL AND GAS APPLICATIONS - Environmentally friendly compounds for corrosion inhibition and hydrocarbonaceous deposit removal and methods using such compounds are disclosed and claimed. The compounds are derivatives of heterocyclic bis-quaternary molecules having an amido moiety and are applicable to a variety of oil and gas operations. | 06-11-2009 |
| 20090181867 | CORROSION INHIBITORS FOR OILFIELD APPLICATIONS - 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 CO | 07-16-2009 |
| 20100167966 | CORROSION INHIBITORS - Provided is an anticorrosive composition for use in aqueous salt solutions. The composition contains an antimony compound and at least two other components selected from morpholine derivatives, acetylenic alcohols, ascorbic acid derivatives, and selenium compounds. The composition is particularly useful for inhibiting corrosion of metallic surfaces of drilling devices or refrigeration systems that are in contact with salt brines at elevated temperatures. | 07-01-2010 |
| 20100261623 | Corrosion inhibitor compositions comprising an aldehyde and a thiol and/or an amine functionalized ring structure and associated methods - Provided herein are methods and compositions that include a method comprising contacting a metal surface with an acidic fluid comprising a corrosion inhibitor that comprises a reaction product formed from a direct or an indirect reaction of an aldehyde with a thiol and/or an amine functionalized ring structure. A composition provided includes an acidic treatment fluid that comprises an aqueous-base fluid, and acid, and a corrosion inhibitor that comprises a reaction product formed from a direct or an indirect reaction of an aldehyde with a thiol and/or an amine functionalized ring structure. | 10-14-2010 |
| 20110071059 | FOAMERS FOR DOWNHOLE INJECTION - The present invention relates to a method for introducing a foaming composition including an imidazoline-based compound to a fluid. The foaming composition comprises at least one quaternized compound having an imidazoline moiety. An example of the quaternized compound is a quaternized imidazoline. | 03-24-2011 |
| 20120010110 | Method of Using Dithiazines and Derivatives Thereof in the Treatment of Wells - Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine derivative of the formula: | 01-12-2012 |
| 20130130950 | HYDROGEN BONDING MATERIAL FOR OILFIELD APPLICATION - Methods of treating a well, by providing a supramolecular polymer fluid comprising units connected via reversible hydrogen bonds to form a supramolecular polymer; by introducing the supramolecular polymer fluid in the well; and by treating the well with the supramolecular polymer fluid. | 05-23-2013 |
| 20140057817 | METHOD OF SCAVENGING HYDROGEN SULFIDE AND/OR SULFHYDRYL COMPOUNDS - A method of reducing the amount of sulfhydryl compounds from sour hydrocarbon fluids is described. In the method, an aldehyde-releasing compound, which is high temperature stable and is highly water-soluble, is introduced to a hydrocarbon fluid stream as a scavenger for sulfhydryl compounds. The aldehyde-releasing compound is allowed to mix with the hydrocarbon fluid stream and the aldehyde-releasing compound is allowed to react with the sulfhydryl compounds present in the hydrocarbon fluid stream, thereby reducing the presence sulfhydryl compound in the hydrocarbon fluid stream. | 02-27-2014 |
| 20150299556 | METHOD OF USING SOPHOROLIPIDS OR MANNOSYLERYTHRITOL LIPIDS AS ACID CORROSION INHIBITORS IN WELL TREATMENT OPERATIONS - Corrosive effects arising during well treatment applications are inhibited and/or prevented by introducing into the well composition containing a corrosion inhibitor of a sophorolipid or a mannosylerythritol lipid or a combination thereof. The composition may also contain a corrosion inhibitor intensifier. | 10-22-2015 |
| 20160177226 | OILFIELD CLEANER AND CORROSION INHIBITOR | 06-23-2016 |
| 20180022985 | METHOD OF USING CATIONIC POLYMERS COMPRISING IMIDAZOLIUM GROUPS FOR PERMANENT CLAY STABILIZATION | 01-25-2018 |
