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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...
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7229831 |
Leak site odorization for gas leak detection
An apparatus for detecting a leak of a fluid from a vessel having an inner wall and an outer wall includes: at least one odorant layer adjacent the inner wall or the outer wall; and at least one...
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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...
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6967340 |
Ion beam irradiation device and operating method thereof
An ion beam irradiation device includes a vacuum chamber and a stage on which at least two substrates may be mounted such that each substrate has an inclination angle to a horizontal plane of the...
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6939717 |
Hydrogen sulphide detection method and apparatus
Described is a downhole method and apparatus for detecting hydrogen sulphide in formation fluids produced in a hydrocarbon well. The sensor system is located within or in communication with an...
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6852286 |
Device for extracting and taking samples from an aqueous solution in a substrate
A device is provided for extraction of samples of an aqueous solution in a substratum. A probe made up of a pyrometric capsule of porous porcelain has one end of lesser diameter to which is...
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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...
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6443001 |
Method and system for extracting, analyzing and measuring constituents transported by a bore fluid
The present invention relates to an extraction, analysis and measuring method and system intended for constituents carried along by a well fluid during drilling operations. The system comprises in...
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6323034 |
Amorphous TFT process
A thin film transistor design is described which is not subject to either dark or photo current leakage. The process to manufacture this device begins with the formation of a gate electrode on a...
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5998211 |
Use of compounds which absorb and/or fluoresce in the IR region as markers for liquids
Use of compounds from the class of the phthalocyanines, naphthalocyanines, nickel dithiolene complexes, aminium compounds of aromatic amines, methine dyes or azulenesquaric acid dyes which have...
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5958777 |
Device for determining CO.sub.2 and CO in a geologic sediment
A device for determining at least one petroleum characteristic of a geologic sediment sample placed in a boat, said device including a first heater heating said sample in a non-oxidizing...
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5919710 |
Optical method for quantitating dissolved oxygen in fuel
A method for the quantitative determination of dissolved oxygen in a liquid fuel includes the steps of doping a sample of the fuel with a preselected concentration of a probe material including a...
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5843787 |
Method allowing the fast assessment of at least one petroleum characteristic of a rock sample-application to a reservoir comprising heavy oils
A method allowing fast assessment of at least one petroleum characteristic of geologic sediments from a sample of these sediments, said method comprising heating the sample in a non-oxidizing...
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5811308 |
Method for determining petroleum characteristics of geologic sediments
The present invention relates to a method for determining at least one petroleum characteristic of a geologic sediment sample heated in a non-oxidizing atmosphere and an oxidizing atmosphere. The...
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5741707 |
Method for quantitative analysis of earth samples
A method and apparatus for analyzing a sample to determine its mineral composition. The invention combines X-ray diffraction with Fourier transform infrared spectroscopy to provide a complete...
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5679574 |
Quantitative test for oils, crude oil, hydrocarbon, or other contaminants in soil and a kit for performing the same
A method for the quantitative determination of oil in a soil matrix is provided, in which the method involves: extracting a soil sample with a solvent in the presence of a drying agent to provide...
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5641642 |
In situ biofilm coupon device
An apparatus for characterization of in-situ microbial biofilm populations in subsurface groundwater. The device permits biofilm-forming microorganisms to adhere to packing material while emplaced...
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5627076 |
Method for determination of glycols and polyglycols in drilling fluid filtrates
An apparatus and method is presented for the determination of water soluble glycols and polyglycols (polyalkoxylates). The apparatus and method are particularly suited for the on-site quantitation...
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5470749 |
Method for determining steam quality using a foaming surfactant
Steam quality is measured by mixing the steam with a small amount of surfactant to convert the steam to a stable foam, passing the stable foam through a capillary tube to determine foam quality...
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5397708 |
Method for detection of sulfides
A method for determining the concentration of sulfide in a process stream. The method comprises the steps of adding to a process stream a sulfide scavenger (probe) that changes electronic...
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5360738 |
Method of quantitative analysis of drilling fluid products
A method of quantitative analysis of products, such as barite, bentonite or polymers, in a drilling fluid circulating in a wellbore being drilled is described. The method includes the steps of...
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5344781 |
Detection and prevention of hydrocarbon leakage from underground storage tanks
Methods and apparatuses for detecting leakage of hydrocarbons from and preventing corrosion of underground storage tanks. Soil samples near an underground storage tank are taken and analyzed in the...
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5319966 |
Determining location and composition of liquid contaminants in geologic formations
A method is provided for locating non-aqueous phase liquid in an aquifer. An aqueous solution having the capacity to solubilize the contaminating liquid to concentrations greater than the...
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5304494 |
Method of analyzing hydrocarbon oil mixtures using gel-permeation chromatography
A method of analyzing a mixture of hydrocarbon oils by using gel-permeation chromatography together with infrared detection. According to the method the signals from the infrared detector are...
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5266496 |
Headspace analysis
A process for extracting and analyzing virtually any sample which may be contaminated with pollutants, toxics or other impurities. The process can be used to extract and analyze one contaminant,...
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5212093 |
Method to determine drift and residual oil saturation
Drift or residual oil saturation within a reservoir around a wellbore is determined by injection of a water-soluble tracer and then producing from the well. This injection is performed twice. The...
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5015586 |
Method and apparatus useful in geochemical exploration for petroleum oils
Method and kit useful in geochemical exploration for petroleum oils. The method involves contacting a soil sample with serum from a rabbit that has not been immunized with petroleum oils, and...
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4992379 |
Field test for aromatics in groundwater
A simple, on-site, field test method and kit for aromatic contamination in a water sample is provided. In the field test, the water sample is first extracted using an alkyl halide extractant, with...
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4950594 |
Microbiological assay using bioluminescent organism
A microbiological assay based on bioluminesce employing the bioluminescent dinoflagellate Pyrocystis lunula. An oil well drilling fluid sample is prepared according to E. P. A. procedures to obtain...
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4904603 |
Monitoring drilling mud
The invention in one aspect provides a method of testing drilling mud in use which comprises periodically sampling the circulating mud and analyzing its aqueous filtrate at the rig site by ion...
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4765182 |
System and method for hydrocarbon reserve evaluation
During oil and gas well drilling operations, drilling fluid volume circulated per preselected vertical borehole increment drilled is continuously measured as well as the percentage by volume of...
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4755469 |
Oil tracing method
A method for tagging an oil so that subsequently it may be identified as to source by incorporating into the oil as a tracer material an oil-soluble or oil-dispersible Group VIB, Group VIIB or...
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4713347 |
Measurement of ligand/anti-ligand interactions using bulk conductance
Methods, apparatus and sensors are described for detection of specific ligands in a fluid sample by measuring ligand-specific changes in the bulk electrical conductance (or resistance) of a fixed...
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4659676 |
Fluorescent tracers for hydrophobic fluids
A fluorescently labeled complex hydrophobic fluid produced by dissolving a porphyrin therein. The porphyrin must be substantially soluble in acidic aqueous solutions, substantially insoluble in...
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4565086 |
Method and apparatus for detecting entrained gases in fluids
Apparatus and method for detecting the level of gases entrained within a circulating drilling fluid used in subterranean well operations are disclosed. Detection of incipient gas kicks during...
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4378055 |
Analyzing for helium in drilling muds to locate geothermal reservoirs
A method of subterranean exploration which comprises locating areas of anomalously high concentrations of helium indicative of geothermal reservoirs, geopressurized zones, petroleum reservoirs and...
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4370146 |
Infrared absorption determination of sulfonate surfactants utilizing deuterated sulfonates
A method for determining the concentration of a brine tolerant sulfonate surfactant in a complex mixture containing, in addition to said brine tolerant sulfonate surfactant, lignosulfonates, crude...
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4306879 |
Chemical logging of geothermal wells
The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate...
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4250142 |
Volatile hydrocarbon detector apparatus
This invention is a volatile hydrocarbon detector apparatus to continuously sample methane gas in an oil well drilling mud. The detector apparatus includes 1) a gas sampler assembly to gather the...
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4213762 |
Determination of chromate ion in drilling mud filtrates
A method of determining the amount of chromate ion in drilling and mud filtrates containing lignosulfonates is disclosed. Briefly, the method comprises: (a) treating the filtrate with an effective...
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4157283 |
Sulfide monitoring system and method
Methods and apparatus relating to systems for determination of sulfide species and hydrogen sulfide hazard potential of well drilling mud.
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4124475 |
Hydrogen sulfide monitoring system
Methods and apparatus relating to systems for determination of sulfide species and hydrogen sulfide hazard potential of well drilling mud.
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3714811 |
MARINE MUD HYDROCARBON SURVEYING
A process for exploring a water-covered region is improved by jetting water into soft bottom sediments, forming a slurry of the sediments in water, extracting gas from the slurry and measuring the...
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3685345 |
EQUILIBRATED SOIL-GAS SAMPLING
The sampling of the concentration of a selected fluid in a subterranean earth formation is improved by circulating a fluid into repetitive contacts with the earth formation and measuring the...
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3561546 |
METHOD OF AND APPARATUS FOR UNDERWATER GEOCHEMICAL EXPLORATION
A method of and apparatus for underwater geochemical prospecting by taking samples of the bottom formation and water at or immediately above the bottom. The method comprises taking samples...
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3407042 |
Well testing method
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3342558 |
Electrical measuring system utilizing a fuel cell
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3303002 |
Method of separating hydrocarbons from a sample
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3287088 |
Analyzing drilling fluid for aromatic hydrocarbons
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3240068 |
Mud-gas sampling system
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