Patent application number | Description | Published |
20080283418 | Quantitative Transient Analysis of Localized Corrosion - An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient. | 11-20-2008 |
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 |
20090184003 | Localized Corrosion Monitoring Device for Limited Conductivity Fluids - A localized corrosion monitoring (LCM) device is modified to obtain polarization resistance (R | 07-23-2009 |
20090211335 | Methods and Apparatus for Monitoring Deposit Formation in Gas Systems - Solids deposition in a gas environment, such as a gas transmission line or pipeline are measured using metal-coated quartz crystal microbalance (QCM) in a QCM probe within a high pressure gas chamber in the gas environment. The metal coated on the QCM may be iron, iron alloys and/or iron oxide. The weight measurements are conducted at a constant (ΔT) or controlled (T=f(t)) temperature between the high pressure gas chamber and the QCM probe. The weight gain during a CE cycle is associated with the solids formation rate. | 08-27-2009 |
20100056400 | Use of Mineral Oils to Reduce Fluid Loss for Viscoelastic Surfactant Gelled Fluids - Fluids viscosified with viscoelastic surfactants (VESS) may have their fluid loss properties improved with at least one mineral oil which has a viscosity greater than 20 cps at ambient temperature. The mineral oil may initially be dispersed oil droplets in an internal, discontinuous phase of the fluid. In one non-limiting embodiment, the mineral oil is added to the fluid after it has been substantially gelled in an amount between about 0.2 to about 10% by volume. | 03-04-2010 |
20100160186 | 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, where the corrosion inhibitor has a surfactant property that helps define the microemulsion. For example, the corrosion inhibitor itself may have its pH adjusted so that it also serves the role of surfactant. The corrosion inhibitors form microemulsions with particle or droplet diameters of about 10 to about 300 nm. The microemulsions may be oil-in-water, water-in-oil or bi-continuous. | 06-24-2010 |
20100301275 | METHOD FOR REDUCING METAL CORROSION - Mitigating or preventing corrosion of metal may be achieved in systems that are alkaline, such as carbon dioxide capture systems. The method may include adding an additive to a system wherein the system is at an alkaline pH; the system has both O | 12-02-2010 |
20110278024 | PREVENTION OR MITIGATION OF STEEL CORROSION CAUSED BY COMBUSTION GAS - Recovering oil and gas from subterranean oil and gas reservoirs using gas injection can serve an additional purpose of capturing and sequestering carbon dioxide. This can be accomplished where the feed gas for the gas injection is, at least in part, carbon dioxide from a carbon dioxide capture and sequestration process. Corrosion of steel in a gas transportation system due to the presence of carbon dioxide and water and oxygen may be prevented or at least mitigated by employing a corrosion inhibitor effective at preventing or mitigating steel corrosion in the presence of oxygen and carbon dioxide. The corrosion inhibitors may incorporate alkyl succinic acids, alkyl succinic anhydrides, and trimer acids. | 11-17-2011 |
20110315921 | Water-Based Formulation of H2S/Mercaptan Scavenger for Fluids in Oilfield and Refinery Applications - Hydrogen sulfide (H | 12-29-2011 |
20120132526 | Localized Corrosion Monitoring Device for Limited Conductivity Fluids - A localized corrosion monitoring (LCM) device is modified to obtain polarization resistance (R | 05-31-2012 |
20120241361 | Synergistic H2S/Mercaptan Scavengers Using Glyoxal - The use of neutral aqueous solutions of glyoxal (pH approximately 6 to 8.5) scavenges H | 09-27-2012 |
20130004393 | Synergistic Method for Enhanced H2S/Mercaptan Scavenging - The use of a dialdehyde (e.g. glyoxal) and a nitrogen-containing scavenger (e.g. a triazine) when injected separately in media containing hydrogen sulfide (H | 01-03-2013 |
20130089460 | INHIBITING CORROSION CAUSED BY AQUEOUS ALDEHYDE SOLUTIONS - Aldehydes useful as H | 04-11-2013 |
20130090271 | INHIBITING CORROSION CAUSED BY AQUEOUS ALDEHYDE SOLUTIONS - Aldehydes useful as H | 04-11-2013 |
20130101460 | INHIBITING CORROSION IN AQUEOUS FILMS - In a process for the exploration for or the production of crude oil and/or natural gas, wherein metal objects are exposed to a gas for period of time sufficient to produce an aqueous film, a method including introducing a corrosion inhibitor into a fluid in contact with the subject metal under conditions sufficient to introduce the corrosion inhibitor into the aqueous film can be used to prevent excessive corrosion. Useful as the corrosion inhibitor is 2-sulfanylpropan-1-ol, also known as 2-mercapto-ethanol, and 2-mercapto-ethanol substituted with one or two methyl groups, and combinations thereof. | 04-25-2013 |
20130224092 | INHIBITING CORROSION CAUSED BY AQUEOUS ALDEHYDE SOLUTIONS - Aldehydes useful as H | 08-29-2013 |
20130320258 | Synergistic H2S Scavengers - The use of a composition that includes a metal salt and an oil soluble amine formaldehyde reaction product scavenges H | 12-05-2013 |
20140190870 | SYNERGISTIC H2S SCAVENGER COMBINATION OF TRANSITION METAL SALTS WITH WATER-SOLUBLE ALDEHYDES AND ALDEHYDE PRECURSORS - The use of a composition including a transition metal salt and at least one water-soluble aldehyde or water-soluble aldehyde precursor scavenges H | 07-10-2014 |
20140305845 | METAL CARBOXYLATE SALTS AS H2S SCAVENGERS IN MIXED PRODUCTION OR DRY GAS OR WET GAS SYSTEMS - A transition metal carboxylate scavenger may be used to scavenge contaminants from systems from mixed production and/or gas, either dry or wet hydrocarbon gas. The contaminants scavenged or otherwise removed may include, but are not necessarily limited to, H | 10-16-2014 |