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| Number | Title | Issue Date |
| 7807467 | Method for prediction of high frequency reciprocating rig wear scar diameter for hydrocarbon mixtures based on mid-infrared spectroscopy A method is disclosed for predicting the High Frequency Reciprocating Rig (HFRR) wear scar diameter for a hydrocarbon mixture using an HFRR wear scar diameter prediction equation which predicts the HFRR wear scar diameter based on the mid-infrared spectroscopy test ... | 10/05/2010 |
| 7736900 | Automated flocculation titration method for accurate determination of Heithaus parameters A system for determining parameters and compatibility of a substance such as an asphalt or other petroleum substance uses titration to highly accurately determine one or more flocculation occurrences and is especially applicable to the determination or use of Heitha... | 06/15/2010 |
| 7718434 | Method for determining the characteristics of crude oils and mixtures of chain molecules by diffusion and relaxation measurements The diffusion coefficients and relaxation times of mixtures of alkanes follow simple scaling laws based on the chain length of the constituents and the mean chain length of the mixture. These scaling laws are used to determine chain sizes in a mixture from the distr... | 05/18/2010 |
| 7618822 | Predictive crude oil compatibility model A method for blending at least two hydrocarbon liquids, the method comprising: (a) determining the critical solvent power for each hydrocarbon liquid by (i) mixing each hydrocarbon liquid with predetermined amounts of a paraffin; (ii) centrifuging each resulting mix... | 11/17/2009 |
| 7445934 | System and method for estimating filtrate contamination in formation fluid samples using refractive index A method and apparatus is described for estimating terminal purity or terminal contamination for a fluid during the withdrawal of the fluid from a subsurface formation. The apparatus and method provide for measuring refractive index of the fluid over a time period, ... | 11/04/2008 |
| 7435597 | Assays for zero-valent transition metals in sedimentary rocks using carbon monoxide with application to oil and gas exploration The present invention is directed to novel assays for zero-valent transition metals. The novel assays of the present invention are generally methods or processes for quantitatively and/or qualitatively evaluating the presence of zero-valent transition metals on and/... | 10/14/2008 |
| 7393689 | Method and apparatus for characterizing coal tar in soil The present invention provides a method and apparatus or system for determining an amount of coal tar that can enter, and subsequently be displaced from, a given type of soil for a range of depths of the soil. The method and apparatus also provide verification of th... | 07/01/2008 |
| 7368909 | Downhole high resolution NMR spectroscopy with polarization enhancement An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a m... | 05/06/2008 |
| 7344889 | Chemical structural and compositional yields model for predicting hydrocarbon thermolysis products A method of predicting the composition of hydrocarbon products of a complex carbonaceous material when exposed to specific time and temperature conditions is disclosed. In one embodiment, the material is characterized to obtain elemental, chemical and structural par... | 03/18/2008 |
| 7285411 | High throughput screening assay systems in microscale fluidic devices The present invention provides novel microfluidic devices and methods that are useful for performing high-throughput screening assays. In particular, the devices and methods of the invention are useful in screening large numbers of different compounds for their effe... | 10/23/2007 |
| 7223602 | Continuous tracer generation method The invention provides a method of online and on-site tracer generation for tagging natural gas stored in underground storage fields wherein feedstock is drawn from a feedstock source. The feedstock undergoes initial analysis to determine hydrocarbon levels. The fee... | 05/29/2007 |
| 7223603 | Continuous on-line process control of residua distillation Ultrasonic spectroscopy, calorimetry, or thermogravimetric analysis provide measures which correlate with properties of asphaltene complex of petroleum residua which can be used to establish or maintain consistent properties of petroleum residua during blending or t... | 05/29/2007 |
| 7208451 | IMS detection of chemical markers in petroleum products A method and composition for identifying chemically tagged petroleum products can be achieved by adding one or more chemicals to a selected petroleum product wherein the chemical is immune to extraction from the petroleum product by conventional inexpensive absorben... | 04/24/2007 |
| 7160728 | Methods for optimal usage and improved valuation of corrosive petroleum feedstocks and fractions (law521) The invention is a method to improve the prediction of the corrosivity of organic acids in petroleum crudes, feedstocks and distillation fractions by providing a more accurate, repeatable, and rapid means of determining the TAN from the IR spectrum of the material. ... | 01/09/2007 |
| 7153688 | Rock assay for predicting oil or gas in target reservoirs The present invention relates to assays for ascribing catalytic activity to rock samples by virtue of zero-valent transition metals potentially being present within the sample. Embodiments of the present invention are generally directed to novel assays for measuring... | 12/26/2006 |
| 7126332 | Downhole high resolution NMR spectroscopy with polarization enhancement An apparatus and method is discussed for characterizing a fluid sample downhole of aliphatic hydrocarbon compounds, aromatic hydrocarbon compound, or connate mud filtrates containing carbon-13 isotopes using an enhanced nuclear magnetic resonance (NMR) signal on a m... | 10/24/2006 |
| 7108237 | Mounting bracket for a gaming machine A mounting bracket for a slot machine is disclosed herein, where the slot machine is slid onto the mounting bracket. The mounting bracket insures proper alignment of the slot machine onto the platform and secures the slot machine into position. ... | 09/19/2006 |
| 7096749 | Air sampling device and method A lightweight, economical, mass-producible, reusable airfoil can be deployed in an airspace while in or attached to any moving vehicle for the purpose of collecting air samples. A frame has an airfoil shape that provides pressure differentials that preferentially di... | 08/29/2006 |
| 7080686 | Devices and methods for extraction, transportation and/or release of material Provided are methods and apparatuses for extracting, transporting and/or releasing various kinds of liquid and semi-liquid materials. The materials may have very high viscosity and may include solids. Generally speaking, the apparatus includes a container, a gateway... | 07/25/2006 |
| 7032662 | Method for determining the extent of recovery of materials injected into oil wells or subsurface formations during oil and gas exploration and production Disclosed is a method of determining the extent of recovery of materials injected into oil wells or subsurface formations. The method includes injection of one or more tracers into an oil well or into a formation. Included in the method are the steps of introducing ... | 04/25/2006 |
| 7008793 | Method and device for taking a sample of an emulsion circulating in a line The present invention is intended to take a sample of an emulsion circulating in a line. The emulsion is momentarily diverted from the main circulation line 1 thereof to a bypass line 2. By restoring circulation of the emulsion in main line 1, a... | 03/07/2006 |
| 6977499 | Formation-based interpretation of NMR data for carbonate reservoirs An apparatus and method for determining a parameter of interest of a formation composed of carbonate rock. A nuclear magnetic resonance (NMR) sensor assembly produces a pulsed RF field designed for obtaining measurements indicative of the parameter of interest of th... | 12/20/2005 |
| 6911065 | Method and system for supplying high purity fluid A fluid purifying apparatus that includes a manifold that includes a first branch and a second branch, a first check valve coupled to the first branch of the manifold, and a purifier unit that includes a first end and a second end, wherein the first end is coupled t... | 06/28/2005 |
| 6869803 | Method to quantitatively analyze conjugated dienes in hydrocarbon feeds and products as an indicator of fouling potential A method to quantify the conjugated dienes in a feedstream including the steps of dissolving 4-methyl-1,2,4-trazoline-3,5-dione (MTAD) in said feedstream, and determining the molar concentration of said conjugated dienes and/or the carbon number distribution of said... | 03/22/2005 |
| 6828153 | Method and apparatus for measuring the accessibility of porous materials with regard to large compounds The present invention provides a method for testing the accessibility of porous materials with regard to large, often high-molecular weight compounds and correlating said accessibility to the porous material's accessibility under conditions of use, i.e. the applicat... | 12/07/2004 |
| 6773921 | Predicting proximity to coke formation Indicia of stability or thresholds of instability may be used to assess the proximity of hydrocarbon materials such as petroleum residua to deposition of carbon rich materials. The invention may be used to evaluate suitability of such hydrocarbon materials to variou... | 08/10/2004 |
| 6725926 | Method of tracking fluids produced from various zones in subterranean wells Compositions and methods for determining the source of treatment fluids being produced from a production formation having multiple zones by introducing a treatment composition having a tracking material into a zone in the subterranean formation, and detecting the tr... | 04/27/2004 |
| 6662116 | Method for analyzing an unknown material as a blend of known materials calculated so as to match certain analytical data and predicting properties of the unknown based on the calculated blend A method for determining a property of an unknown material including the steps of determining the IR spectrum of the unknown material, fitting the IR spectrum to a linear combination of known spectra in a database, wherein a database includes spectra of r... | 12/09/2003 |
| 6659175 | Method for determining the extent of recovery of materials injected into oil wells during oil and gas exploration and production Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concent... | 12/09/2003 |
| 6630357 | Quantification of bitumen using NMR A method of determining the composition of a sample including heavy oil or bitumen and water using low-field NMR. The NMR spectrum of the sample is taken at relatively low and high temperatures and the oil or water content is determined from the spectra a... | 10/07/2003 |
| 6591702 | Method for identifying sources of rapidly released contaminants at contaminated sites A method for identifying and characterizing contaminated sources in a site having contaminated soils and sediments in which vapor pressure is measured at a plurality of subsurface soil sampling locations of the site, which measurements are then mapped, re... | 07/15/2003 |
| 6534318 | Mass spectrometric multivariate analysis This invention relates to the selection of a crude oil or crude oil blend for the production of high-performing paving asphalt based on molecular composition of the asphalt and of the parent crude oil or crude oil blend based, at least in part, on high re... | 03/18/2003 |
| 6479299 | Pre-disposed assay components in microfluidic devices and methods Microfluidic devices having predisposed assay components for increased throughput and prolonged shelf life are provided.... | 11/12/2002 |
| 6429025 | High-throughput screening assay systems in microscale fluidic devices The present invention provides novel microfluidic devices and methods that are useful for performing high-throughput screening assays. In particular, the devices and methods of the invention are useful in screening large numbers of different compounds for... | 08/06/2002 |
| 6413782 | Methods of manufacturing high-throughput screening systems Microfluidic devices for analyzing a plurality of compounds are manufactured for performing high throughput screening assays. The methods are used to manufacture devices that screen large numbers of different compounds for their effects on a variety of ch... | 07/02/2002 |
| 6365429 | Method for nitride based laser diode with growth substrate removed using an intermediate substrate A method for placing nitride laser diode arrays on a thermally conducting substrate is described. The method uses an excimer laser to detach the nitride laser diode from the sapphire growth substrate after an intermediate substrate has been attached to th... | 04/02/2002 |
| 6331436 | Tracers for heavy oil A process of using a non-radioactive tracer in the monitoring of the flow of a traced fluid is disclosed. The process includes injecting a tracer containing fluid at a first point and analyzing at least one sample from a second point in the flow of the fl... | 12/18/2001 |
| 6321595 | Characterization of organic contaminants and assessment of remediation performance in subsurface formations Characterization of organic contaminants in subsurface formation is performed by methods for detecting the presence of nonaqueous phase liquid in a subsurface formation, and for determining the composition and for determining the volume of nonaqueous phas... | 11/27/2001 |
| 6319717 | Thermal acid base accounting in mine overburden The present invention is a one-step thermal method for analyzing the acid-base content of earth samples, specifically mine overburden samples. By using a low oxygen concentration, preferably about 3%, the transition metal carbonates in the sample decompos... | 11/20/2001 |
| 6312958 | Method for marking liquids with at least two marker substances and method for detecting them The present invention relates to a method of marking liquids using at least two markers, wherein said markers absorb in the 600-1200 nm region of the spectrum and reemit fluorescent light and the absorption range of at least one marker overlaps with the a... | 11/06/2001 |
