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4365153 |
Detection of certain minerals of zinc, tungsten, fluorine, molybdenum, mercury and other metals using photoluminescence
We have discovered that certain photoluminescent minerals of zinc, fluorine, tungsten, molybdenum, mercury and other elements which may naturally occur at the surface of the earth can be...
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4355231 |
Remote analysis using thermal radiation
A method for remote analysis of a mixture of materials where one of the components has thermal characteristics different from the other components. In a preferred embodiment, tar sands on a moving...
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4352014 |
Sampler and cell for radon detectors and method of using same
A relatively small diameter, relatively deep hole is made in the ground and a sampler tube is inserted therein. An acetate sleeve is detachably inserted into a chamber on the upper end of the...
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4349736 |
Method for locating and evaluating subsurface uranium deposits having an apparent grade of up to approximately 5% contained U.sub.3 O.sub.8
This invention relates to a novel method for both locating and evaluating subsurface uranium-bearing formations containing an apparent grade of up to approximately 5% of contained U 3 O 8 which...
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4317033 |
Gamma ray prospecting system
A means and method for distinguishing full energy absorption peaks from background energy in a gamma ray prospecting system. Photopeaks in the received energy spectrum are determined, and...
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4314155 |
Method and apparatus for elemental analysis employing combination of neutron inelastic scattering and γ ray scattering
The present invention discloses a method and apparatus of elemental analysis which finds particular application in the on-line analyses of the specific energy (calorific value) of coal or coke by...
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4297574 |
Radon detection
A method of uranium exploration employs the detection of radon gas decay products to provide an indication of uranium mineralization. A plurality of collectors of similar surface areas are exposed...
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4275298 |
Method of and apparatus for determining the proportion of at least one material in a moving mixture of materials
The proportion of a radioactive material in a moving mass of material is determined with a sensor which derives an output signal proportional to the mass of radioactive material. The output signal...
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4271356 |
Method and apparatus for natural gamma ray spectrum analysis using microprocessor stripper
Gamma spectrum measurement signals received from a downhole instrument containing a scintillation counter are coupled into a multi-channel analyzer. The analyzer converts the received pulses to...
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4262964 |
System for detecting interfaces between mineral seams and the surrounding earth formations
The present invention contemplates a system for detecting an interface between a mineral seam and the surrounding earth formation utilizing a radiation source and a radiation receiver mounted on a...
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4247770 |
Aerial mineral survey method and apparatus using pulsed laser beam to vaporize surface material
A high-energy laser (22) carried in an aircraft (10) directs a laser beam (16) downward to a point (18) on the earth's surface beneath the aircraft (10). The intensity of the laser beam (16) is...
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4238684 |
Radiation dosimeter assembly
A thin film radiation dosimeter is secured to a plate member exhibiting sufficient mechanical strength to function as a dosimeter support member and electrical resistance characteristics which...
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4236071 |
Detection of uranium by light induced luminescence
A method for the detection and identification of uranium bearing materials in media found in nature such as rocks, soils, surface and sub-surface waters, vegetation, or in material which has been...
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4201912 |
Subthreshold neutron interrogator for detection of radioactive materials
A device for detecting fissionable material such as uranium in low concentrations by interrogating with photoneutrons at energy levels below 500 keV, and typically about 26 keV. Induced fast...
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4194634 |
Method and apparatus for sorting radioactive material
A method of and apparatus for sorting pieces or particles of radioactive ore where the particles are moved through the apparatus in an asynchronous or non-constant manner. The particles are moved...
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4186303 |
Exclusion of alpha particles from thoron in uranium detection
Alpha particles emitted from radon 220, a daughter product formed from the decay of thorium, are prevented from reaching an alpha particle detector by enclosing the detector in a volume into which...
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4179614 |
Thermoluminescent dosimeter system
An improved thermoluminescent dosimeter system and apparatus for sensing alpha particle emission. A thermoluminescent body is sealed between a pair of metallized plastic films. The dosimeter is...
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4178512 |
Deepwater in-situ fluorometer
An onboard power supply and metering unit is connected, via an overboard cable e.g., 1000 meters long, to an underwater light-pulse projecting unit and a fluoroescence-sensing receiver unit. The...
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4177378 |
Long-lived reference cell simulating the α scintillation of radon-222
A reference cell simulating the light amplitude spectrum of an alpha scintillation cell containing radon 222 . The cell includes a gas-tight container having a transparent window. The interior of...
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4165460 |
Coal-rock interface detector
A coal-rock interface detector employing a radioactive source and radiation sensor wherein the source and sensor are separately and independently suspended and positioned against a mine surface of...
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4156138 |
Locating underground uranium deposits
Underground uranium deposits are located by placing wires of dosimeters each about 5 to 18 mg/cm 2 thick underground in a grid pattern. Each dosimeter contains a phosphor which is capable of...
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4155007 |
Radiation scanning and detection system
A radiation scanning-detecting and processing system having a composite detector arrangement including detector elements having mutually different sensitive areas. An information processing system...
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4146796 |
Apparatus for radiation source depth determination in a material
An apparatus for determining the depth of a radiation source within a body of material utilizing a radiation source holder moving the radiation source within the body. A plurality of switches have...
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4146788 |
Method and apparatus for quantitative structural analysis of solids
In the proposed method a solid specimen is cleaved to obtain a pair of conjugate cleavage surfaces. Then, a scanning electron microscope is used to obtain images of the conjugate surfaces at a...
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4146791 |
Method and measuring device for testing the support and or covering of an oil or gas pipeline
A measuring device to be conveyed through an oil or gas pipeline at the bottom of the sea is provided for measuring the radioactivity of the surroundings along the pipeline. Thus, the support...
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4129776 |
Detection of subsurface air flow
A method and apparatus are described for determining the occurrence or non-occurrence of subsurface air flow and, in the event of the occurrence of subsurface air flow, being able to determine its...
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4118623 |
Continuous quality control of mined hard and soft coals
A method is provided for determining the shale content of mined coal by monitoring the thorium content of the coal. Thorium content and ash content are shown to be related whereby a direct reading...
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4115688 |
Mining and drilling control of distance to the coal-shale interface - thorium measurement by gamma spectrometry
A method for determining the distance from a given point in a coal seam to shale by sensing the thorium radiation from shale layers positioned about the coal seam. The invention is useful for...
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4109522 |
Method of borehole logging using passive Josephson current detector to directly determine the presence of hydrocarbons
A high-gain Josephson-type two-particle tunneling detector is positioned in a borehole penetrating an earth formation and tuned for response in a frequency range of 8400 to 9600 gigahertz. Result:...
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4090072 |
Method for determination of economically interesting metals in content of manganese nodules
Presence of metals such as copper and nickel being economically interesting etals are determined as to existence thereof in the content of manganese nodules according to a method by means of...
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4071755 |
Method for in situ evaluation of the source rock potential of earth formations
A technique for the in situ evaluation of the organic carbon content of earth formations penetrated by a well borehole is disclosed. The energy spectrum of natural gamma radiation occurring in...
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4066892 |
Coal logging system
A borehole logging tool employs two neutron sources of differing energy outputs, two gamma-ray detectors, and a neutron detector in the radioactivity logging of a coal-bearing formation. A first of...
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4066891 |
Geochemical and geophysical exploration
Valuable information on the presence or absence of uranium-enriched ores, geothermal reservoirs, or natural gas sources is obtained by analyzing earth samples for their relative Po210 content.
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4064436 |
Reducing noise in uranium exploration
A method and apparatus are described for reducing or removing the background noise caused by thoron gas ( 220 Rn) in uranium exploration conducted by the detection of radon gas ( 222 Rn)...
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4063090 |
Method for isotope separation by photodeflection
In the method of separating isotopes wherein a desired isotope species is selectively deflected out of a beam of mixed isotopes by irradiating the beam with a directed beam of light of narrowly...
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4063087 |
Reducing noise in uranium exploration
A method and apparatus are described for reducing or removing the background noise caused by thoron gas ( 220 Rn) in uranium exploration conducted by the detection of radon gas ( 222 Rn)...
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4059760 |
Georadiological surveying for oil and gas and subsurface structure contour mapping
A prospecting system for hydrocarbons using emanoradiation measurements of the neutron, beta, gamma rays, and radon gas emitted at the earth surface and atmosphere from the earth basement complex...
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4055762 |
Radon daughter dosimeter
A portable radon daughter dosimeter unit used to measure Radon gas alpha daughters in ambient air. These measurements can then be related to preselected preestablished standards contained in a...
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4045676 |
Determining element concentrations in samples
The invention provides a method and apparatus for determining the concentration of an element such as a heavy metal in a matrix of a material such as rock by the X-ray or gamma-ray fluorescence...
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4034218 |
Focused detection logging technique
In accordance with an illustrative embodiment of the present invention, a method and apparatus is disclosed for determining a characteristic of the media surrounding a borehole by emitting gamma...
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4031367 |
Methods and apparatus for pulse height analyzer offset control
A pulse circuit periodically produces test pulses of two different amplitudes which are eventually fed in appropriate time intervals to the input of a multi-channel pulse height analyzer to enable...
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4025788 |
Radiometric analyzer
A radiometric analyzer for measuring the characteristic values of a sample by radiation includes a plurality of radiation measuring subsystems having different ratios of sensitivities to the...
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4017731 |
Method and apparatus for prospecting for buried mineral deposits
Radioactive gaseous decay products emanating from a buried deposit of uranium or other radioactive ore migrate upwardly through the earth and are exhaled into the atmosphere. These products may be...
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4008392 |
Method for determining fluid type and lithology of subterranean formations
Disclosed herein in a method for determining the lithology of and the types of fluid contained within a subterranean formation. In the practice of this invention, high energy neutrons bombard the...
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4005289 |
Method for identifying anomalous terrestrial heat flows
A method for locating and mapping the magnitude and extent of terrestrial heat-flow anomalies from 5 to 50 times average with a tenfold improved sensitivity over orthodox applications of aerial...
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3993904 |
Low-cost but accurate radioactive logging for determining water saturations in a reservoir
A method is disclosed for determining water saturation in a petroleum reservoir using logging signals indirectly related to the abundance of oxygen nuclei in the reservoir rock. The first step of...
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3993902 |
Radioactive logging for determining oil saturation in a reservoir
A method is disclosed for determining oil saturation in a petroleum reservoir using logging signals indirectly related to the abundance of carbon nuclei in the reservoir rock. The first step of the...
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3992287 |
Oil shale sorting
Sorting of bicarbonate containing ore particles from oil containing ore particles in a mixture of the two types of ore particles by treating the surface of the mixture with an aqueous medium and...
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3988615 |
Method for radioactivity monitoring
The disclosure relates to a method for analyzing uranium and/or thorium contents of liquid effluents preferably utilizing a sample containing counting chamber. Basically, 185.7-keV gamma rays...
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3980881 |
Simultaneous logging system for deep wells
An improved well logging system of the type utilizing a single conductor cable to provide power from the surface equipment to a down hole subsurface unit and for simultaneously supplying current...
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