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| Number | Title | Issue Date |
| 8183179 | System, method, and apparatus for acid fracturing with scale inhibitor protection A method for treating a subterranean formation includes forming a treatment fluid including a carrier fluid, a solid acid-precursor, and a solid scale inhibitor. The solid acid-precursor includes a material that forms an acid at downhole conditions in the subterrane... | 05/22/2012 |
| 8158561 | Scale and corrosion inhibitors for high temperature and pressure conditions The present invention relates to a method for inhibiting scale and corrosion in aqueous systems, for example, under high temperature and pressure conditions such as temperatures up to 250° C. and/or pressures up to 10000 psi (i.e., about 68.9 MPa). The method invol... | 04/17/2012 |
| 8119573 | 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. ... | 02/21/2012 |
| 8101554 | Well treatment comprising a polymer formed from a diallyl ammonium salt and a scale inhibitor The present invention provides a method for increasing the retention of a scale inhibitor within a hydrocarbon producing system (e.g. a subterranean formation), said method comprising contacting said system with a polymer formed from a diallyl ammonium salt and with... | 01/24/2012 |
| 8058211 | Corrosion inhibitor intensifier compositions and associated methods Of the many methods and compositions provided herein, one method includes a method comprising contacting a metal surface with an acidic fluid comprising an aqueous base-fluid, an acid, a corrosion inhibitor, and a corrosion inhibitor intensifier composition comprisi... | 11/15/2011 |
| 8048827 | Kinetic gas hydrate inhibitors in completion fluids Gas hydrate formation in a well completion fluid in the annular space of a hydrocarbon producing well may be controlled by the incorporation of effective amounts of one or more low dose gas hydrate inhibitors, including but not limited to, low dosage hydrate inhibit... | 11/01/2011 |
| 8043996 | Method for treatment of underground reservoirs A process is disclosed for treating an underground formation, which process comprises: (a) introducing into the underground formation a micellar dispersion comprising water, one or more organic acid precursors, one or more surfactants and, optionally, one or more sa... | 10/25/2011 |
| 8039421 | Process using aloe for inhibiting scale A method is provided for inhibiting scale in a hydrocarbon system, including the steps of: providing a hydrocarbon system; providing an aloe-derived scale inhibitor; and mixing the aloe-derived scale inhibitor with the hydrocarbon system in amounts effective to inhi... | 10/18/2011 |
| 8039422 | Method of mixing a corrosion inhibitor in an acid-in-oil emulsion An acid-in-oil emulsion having a corrosion inhibitor as the external phase has been found to prevent downhole corrosion when acidizing carbonate formations to enhance hydrocarbon recovery. ... | 10/18/2011 |
| 8034748 | Additives for inhibiting the formation of gas hydrates The present invention relates to an additive, and its use for inhibiting nucleation, growth and agglomeration of gas hydrates by adding an effective amount of an inhibitor to a multiphasic mixture which tends to hydrate formation and consists of water, gas and optio... | 10/11/2011 |
| 8003574 | Inhibiting naphthenate solids and emulsions in crude oil Naphthenic acid solids and/or emulsions can be inhibited by introducing an additive to crude oil prior to or concurrent with the deprotonation of the naphthenic acids present in the crude oil. The additives may be surfactants and can be amines, quaternary ammonium c... | 08/23/2011 |
| 8003573 | Method for remediating flow-restricting hydrate deposits in production systems A method to remove hydrate plugs in a production system by passing a non-hydrate-forming or a hydrate-forming gas, which forms hydrates at a higher pressure than the existing hydrate, through the flow-restricting hydrate. ... | 08/23/2011 |
| 8003575 | Scale squeeze treatment systems and methods An aqueous composition for treating hydrocarbon wells contains (a) a scale inhibitor and (b) a viscoelastic surfactant, and further contains from 0 to less than 1% by weight of acid selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric a... | 08/23/2011 |
| 7994099 | 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 ... | 08/09/2011 |
| 7989397 | Methods and compositions relating to the reduction of volatile phosphorus from crude This invention relates to methods and compositions useful in treating crude sources, and more specifically, to methods and compositions useful in reducing the concentration of phosphorus in crude streams and hydrocarbon flowback fluids. In some embodiments, the pres... | 08/02/2011 |
| 7968500 | Gas hydrate protection with heat producing two-component gas hydrate inhibitors Methods and compositions useful in inhibiting the formation, growth, and/or maintenance of gas hydrates in a fluid mixture. The gas hydrate inhibitors comprise polyetheramines and acids that are exothermically reacted in situ to produce polyetherammonium compounds. | 06/28/2011 |
| 7960314 | Microemulsifiers and methods of making and using same A method comprising contacting a zwitterionic surfactant, co-surfactant, and water to form a microemulsifier, and contacting the microemulsifier with an oleaginous fluid under low shear conditions to form a microemulsion. A method comprising introducing a first well... | 06/14/2011 |
| 7951754 | 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 applic... | 05/31/2011 |
| 7902124 | Self-diverting acid treatment with formic-acid-free corrosion inhibitor A method of treating a subterranean formation penetrated by a wellbore of a well having iron-containing components is carried out by introducing a treatment fluid into the wellbore of the well. The treatment fluid is formed from an aqueous solution, a mineral acid, ... | 03/08/2011 |
| 7902123 | Microemulsion cleaning composition A cleaning composition including which comprises a surfactant and a propionate as co-surfactant and/or co-solvent. The composition can be used, for example, to clean drilling mud containing oils. ... | 03/08/2011 |
| 7893009 | Polymers and their production and use as gas hydrate inhibitors The invention relates to polymers with a mean molecular weight of between 500 and 500,000 g/mol that can be produced as follows: A) reaction of a compound of formula 1, in which n stands for 0, 1 or 2 and A for an arbitrari... | 02/22/2011 |
| 7879767 | Additives for hydrate inhibition in fluids gelled with viscoelastic surfactants An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is inhibited against hydrate formation with an effective amount of an additive that could be one or more halide salts of alkali metals and alkali earth metals, formate salts, alcohols, glycol... | 02/01/2011 |
| 7851413 | Method for transporting hydrates in suspension in production effluents empolying a non-polluting additive In order to transport hydrates in suspension in a fluid comprising water, gas and a liquid hydrocarbon, at least one non-polluting composition consisting essentially of a mixture comprising at least one ester associated with a non-ionic co-surfactant of the polymeri... | 12/14/2010 |
| 7833943 | Microemulsifiers and methods of making and using same A method comprising contacting a zwitterionic surfactant, co-surfactant, and water to form a microemulsifier, and contacting the microemulsifier with an oleaginous fluid under low shear conditions to form a microemulsion. A method comprising introducing a first well... | 11/16/2010 |
| 7795183 | Asphaltene Inhibition The present invention provides a method of asphaltene control in a hydrocarbon fluid, the method employing a composition comprising: a dispersant of formulae (I) or (II), including salts thereof, wherein T or T′ is hydrogen or a polymerizing terminating group; A i... | 09/14/2010 |
| 7772160 | Method for controlled placement of additives in oil and gas production Pellets can be injected into oil and gas production equipment that may contain stagnant or slow moving system fluids to treat the stagnant or slow moving system fluids to prevent conditions such as corrosion. The pellets have a density such that they may be moved th... | 08/10/2010 |
| 7737090 | derived scale inhibitor A method is provided for inhibiting scale in a liquid hydrocarbon system, including the steps of: providing a liquid hydrocarbon system; providing an aloe-derived scale inhibitor; and mixing the aloe-derived scale inhibitor with the liquid hydrocarbon ... | 06/15/2010 |
| 7709419 | Method and thermodynamic inhibitors of gas hydrates in water-based fluids The present invention relates to an additive that inhibits formation of gas hydrates for water-based drilling fluid, the additive having at least the following constituents (weight percent): a mixture A of glycerol derivatives havi... | 05/04/2010 |
| 7691788 | Compositions and methods of using same in producing heavy oil and bitumen Compositions and methods of using same are described for negating asphaltene deposition in a formation, wellbore, near wellbore region, and production tubing. Compositions of the invention comprise an asphaltene solvent and a viscosity reducing agent, the asphaltene... | 04/06/2010 |
| 7670993 | Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and acid. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or ... | 03/02/2010 |
| 7645722 | Aloe derived scale inhibitor A method is provided for inhibiting scale in a liquid hydrocarbon system, including the steps of: providing a liquid hydrocarbon system; providing an aloe-derived scale inhibitor; and mixing the aloe-derived scale inhibitor with the liquid hydrocarbon system in amou... | 01/12/2010 |
| 7638465 | Kinetic gas hydrate inhibitors in completion fluids Gas hydrate formation in a well completion fluid in the annular space of a hydrocarbon producing well may be controlled by the incorporation of effective amounts of one or more low dose gas hydrate inhibitors, including but not limited to, low dosage hydrate inhibit... | 12/29/2009 |
| 7632785 | Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, and detergent. This one step method provides for the simultaneously cleaning/removal of asphaltene and/or paraf... | 12/15/2009 |
| 7615516 | Microemulsion containing oil field chemicals useful for oil and gas field applications 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 corrosi... | 11/10/2009 |
| 7585816 | Method for inhibiting hydrate formation A method for inhibiting the formation of gas hydrates in a petroleum fluid having hydrate-forming constituents is claimed. More specifically, the method can be used to treat a petroleum fluid, such as natural gas conveyed in a pipe, to inhibit the formation of a hyd... | 09/08/2009 |
| 7541315 | Paraffin inhibitor compositions and their use in oil and gas production Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent s... | 06/02/2009 |
| 7452848 | Amine-based gas hydrate inhibitors Certain substituted amines, alkylenediamines or polyamines, and derivatives of these, are suitable for use in preventing, inhibiting, or otherwise modifying crystalline gas hydrate formation. These inhibitors include compounds from any of the following groups. | 11/18/2008 |
| 7438797 | Method of controlling asphaltene precipitation in a fluid A method of reducing the aggregation and deposition of asphaltene from a fluid containing asphaltene, such as crude oil, which method comprises the addition to the fluid of a compound of formula (1): wherein A is an optionally substituted ring system containing 6 to... | 10/21/2008 |
| 7419937 | Method for providing treatment chemicals in a subterranean well A method of delivering chemicals such as scale inhibitor into a wellbore producing fluids includes providing the chemicals, in a slow-release form, in a container located in the path of the production fluids so that the production fluids pass through the container. ... | 09/02/2008 |
| 7417009 | Paraffin inhibitors A paraffin inhibitor comprising a polymer composed of about (a) 1 to about 98 weight percent of one or more C1-C30 alkyl esters of acrylic acid; (b) about 1 to about 98 weight percent of one or more C1-C30 alkyl esters of ... | 08/26/2008 |
