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4794452 |
Through flame optical viewing
A method and apparatus for illuminating a target, for example the wall and internal structures of a coal, oil, or gas fired combustion chamber for remote viewing. A coherent light source is used to...
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4786804 |
Means for measuring radon gas in the soil
A device for measuring radon gas in the soil, consisting of a continuous-acting radon meter operating on through-flow principle. The meter comprises an enclosed volume, the gas therein being...
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4785175 |
Inspection of buried pipelines
A method of inspecting the cover of a buried pipeline comprising the operations of irradiating the inner wall of the pipeline with neutrons from a radioactive source carried by a vehicle traversing...
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4782501 |
Method for determining pore volume compressibility of a porous material
A core sample of a porous media of identified porosity at atmospheric conditions is saturated with a fluid having an identified X-ray attenuation coefficient. The fluid saturated sample is scanned...
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4782234 |
Method and apparatus for subsurface contaminant detection and measurement
Subsurface contaminants are readily and inexpensively detected and measured by means of a test head positioned at the subsurface site and forming a protected test chamber for the liquids to be...
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4778992 |
Dosimeter for radon and radon daughter products
An improved radon detector has an enclosed housing with a removeable cap to provide a chamber within which a detector member is mounted for detecting the impact of alpha particle emissions from...
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4769541 |
Spectrometric gamma diagraphy system for the determination of the geological parameters of a rock
This system comprises means for standardizing the detected gamma spectrum and processing it by a reference spectrum. The lithology and/or the nature of the ores are determined, by a processing...
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4754142 |
Gas detector and mining machine
A gas detector (1) to detect a predetermined gas of interest within an air sample, the detector (1) comprising a sampling tube (12), an infra-red radiation source (13) located at one end of the...
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4749858 |
Nuclear measuring gauge with automatic detection of source depth
The present invention provides an apparatus for detecting the depth position of the source rod of a portable nuclear measuring gauge having a housing with the elongate source rod extending...
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4745276 |
Device for the detection of fluorescent substances on the surface of the earth
A device for detecting fluorescence on the surface of the earth is disclosed. The device includes a laser installed in a vehicle, means for irradiating an essentially linear surface area in front...
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4724326 |
Off-chip time-delayed integration area array Fraunhofer line discriminator
An apparatus for determining the fluorescence of materials in a scene which includes optical means to collect radiation from the scene. Means are provided to divide the collected radiation into...
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4722220 |
Quantitative determination by elemental logging of subsurface formation properties
Methods are disclosed which provide for quantifying and characterizing the mineral content of a formation as a function of depth. Elemental data derived from logging tools are input into an...
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4704537 |
Passive dosimeter
In a passive dosimeter including a diffusion chamber having an interior space, and an alpha particle detector located within the chamber for producing an indication of the concentration of radon...
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4700070 |
Radon gas detection apparatus and method
A radon sampling unit comprising a cylindrical body containing a measured amount of charcoal for collecting and holding radon gas. A fine mesh screen is frictionally held on top of the charcoal by...
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4698500 |
Method and apparatus for determining clay counter-ion concentration in shaly sands
The uranium and thorium count rates from a fluid bearing shaly sand reservoir are normalized to the formation porosity and then, by a direct correlation, used to obtain the clay counter-ion...
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4694162 |
Sign bit optical-electrical geophone
An optical-electrical geophone which generates a binary signal is described. The geophone utilizes an optical fiber for the return transmission of a light source in the geophone. The geophone...
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4686364 |
In situ determination of total carbon and evaluation of source rock therefrom
A method for determining in situ the carbon content of a source rock comprises determining the carbon/oxygen elemental ratio of the formation via inelastic gamma spectroscopy, determining the...
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4678911 |
Method of collecting and processing spectral data for the earth's surface
A method of collecting and processing spectral data obtained from the earth's surface is employed to identify areas where hydrocarbon seepage to the surface is occurring. Intensity or brightness is...
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4669299 |
Measuring relative permeability to steam in cores of water and oil containing reservoir formations
Relative permeabilities to flowing steam water and/or oil phases within cores of earth formations are determined by flowing such fluids at reservoir conditions, sealing them within the cores, X-ray...
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4636955 |
Method for establishing continuity between contiguous data sets
A method for merging two adjacent gridded map data sets mismatched at their boundaries is disclosed wherein a first data set is assumed to be correct and the second data set is corrected to the...
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4616133 |
Method and apparatus for characterizing kerogens
A method for characterizing a kerogen by analyzing the change with time of the fluorescence spectrum obtained by irradiating said kerogen with ultraviolet radiation is disclosed. In such method,...
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4614870 |
Miniature isotopic soil moisture gage
A miniature, low power consuming, density gage utilizing extremely small artificial and naturally found radioactive sources. The gage employs a unique method of compensating for the gamma...
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4609821 |
Testing for the presence of native hydrocarbons down a borehole
In order to provide a reliable test for the presence of native hydrocarbons down a borehole during drilling with an oil-base drilling mud, a sample of the rock cuttings brought up from the vicinity...
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4599512 |
Laser induced phosphorescence uranium analysis
A method is described for measuring the uranium content of aqueous solutions wherein a uranyl phosphate complex is irradiated with a 5 nanosecond pulse of 425 nanometer laser light and resultant...
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4593195 |
Method and device for obtaining information relative to organic materials or minerals likely to be contained in geological formations
A method for obtaining information relating to material contained in geological formations. According to this method; these geological formations are subjected to at least one flow of so called...
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4587422 |
Subsurface density testing method
A method for performing nuclear depth density tests in coal stockpiles and a special thin wall housing for the probe used in the tests. A drilling rig employs continuous flight augers to drill an...
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4581531 |
Method for identifying hydrothermal alteration areas of the earth
An aerial natural gamma radiation survey is conducted over an exploration region. A change in the measured T1-208/K-40 ratio in the exploration region in contrast to a region known not to be...
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4581599 |
Nuclear radiation apparatus and methods for surveying physical characteristics and properties
An area is surveyed for variation in a physical characteristic or property which is effective for modifying nuclear radiation of a predetermined type through the use of an apparatus and in...
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4580056 |
Neutron event counting circuit
An electronic circuit provides various accurate counts of detected neutrons to enable the assaying of fissile material in a neutron emitting radioactive source. The circuit develops a time...
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4578579 |
Method for depth referencing hydrocarbon gas shows on mud logs
A hydrocarbon mud log and a natural gamma-ray mud log are recorded for well drilling operations. A natural gamma-ray wireline log is run in the well following drilling operations. The natural...
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4560275 |
Portable instant display and analysis reflectance spectrometer
A portable analysis spectrometer (10) for field mineral identification is coupled to a microprocessor (11) and memory (12) through a bus (13) and A/D converter (14) to display (16) a spectrum of...
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4517458 |
Remote detection of hydrocarbon seeps
A method of detecting hydrocarbon seeps in a sea or in earth is disclosed. The method involves interrogating aerosols formed above the sea or earth surface with an intense beam of primary light...
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4510573 |
Method for X-ray fluorescence spectroscopy
A method and apparatus are described for performing X-ray fluorescence analysis where the physical relationship between the source/detector and the object being examined is not controlled. This...
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4496839 |
System and method for remote detection and identification of chemical species by laser initiated nonresonant infrared spectroscopy
Disclosed is a system and method for remote detection and identification of unknown chemical species in gaseous, aerosol, and liquid states. A pulsed infrared laser is directed at an unknown...
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4491411 |
Exploration method for finding uranium ore bodies
The migration of a uranium ore body through geologic time may be determined by subjecting the carbonaceous material in host rock to vitrinite reflectance analysis. A substantial variation in the...
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4490613 |
Infrared hydrocarbon remote sensor
A method of locating potential oil and gas deposits by directing a beam of coherent high-intensity infrared radiation into the atmosphere above and adjacent the earth's surface, the wave length of...
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4468558 |
Method and apparatus for measuring radon beneath and above the level of the ground
The invention relates to a method and apparatus for measuring at least one of the parameters flow rate, flow velocity, concentration and quantity of radon and/or radon daughters in the ground. The...
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4464568 |
Apparatus for detection and analysis of uranium ores
Apparatus for detection and analysis of secondary uranium ores to provide signature indication of type by ultraviolet induced fluorescence and detection of fluorescence excitation time, peak value...
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4463256 |
Method for determining the presence of platinum in earth formations
A spectral natural gamma radiation logging tool is calibrated with a material of known potassium content so that the natural gamma radiation measured by such logging tool is related to potassium...
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4459478 |
Probe equipment for use in underground mining
The present invention provides probe equipment for mounting on an underground mining machine in order to receive radiation from strata adjacent to the mining machine, the probe equipment comprising...
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4449047 |
Airborne mineral exploration system
In order to achieve airborne exploration for minerals in which both color and size information is obtained from fluorescing targets, a pulsed ultraviolet source is directed downwardly from the...
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4439675 |
Moisture and density gauge
A moisture and density gauge which combines sources of gamma and neutron radiation in a casing which is placed in the medium being analyzed. The gauge includes detectors for the gamma and neutron...
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4434364 |
Method and apparatus for underwater detection of hydrocarbons
Method and apparatus for detecting the presence of hydrocarbons and other substance that fluoresces or absorbs light within a body of water which utilizes a controlled submersible vehicle scanning...
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4433245 |
Fraunhofer line discriminator
An apparatus for the detection of fluorescence. An airborne optical system carried in an aircraft or spaceship scans a sunlit swath of terrain over a field of view defined by a selected one of the...
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4426575 |
Method and apparatus for measuring radon in the ground
The invention relates to a method of measuring the concentration of radon and radon daughters in the ground, particularly at great depth and/or below the ground-water level. In accordance with the...
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4421981 |
Method and apparatus for conducting remote surveys of the earth's crust
The present invention concerns a method for remotely surveying the earth's surface. The method comprises the steps of advancing a plurality of electromagnetic scanning devices (3) along a known...
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4417142 |
Method and apparatus for detecting alpha-emitting substances
The invention relates to a method for detecting and measuring alpha-emitting substances, such as radon and/or daughter products of radon, by registering nuclear tracks on a detector. By conducting...
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4387302 |
Measuring of gamma-ray energy due to inelastic neutron scattering
A source of fast neutrons is pulsed to irradiate the formations surrounding a borehole with neutrons to produce inelastic neutron scattering in metallic materials located within the formations....
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4370552 |
Method for ore prospecting
A method for ore prospecting comprises: locating the ore body, determining the concentration values of a selected chemical element at two positions in the ore body; measuring the distance between...
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4365719 |
Radiometric ore sorting method and apparatus
A method of and apparatus for sorting pieces or particles of radioactive ore where the particles are moved one after another substantially horizontally then discharged into a gravity-accelerated...
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