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| Number | Title | Issue Date |
| 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 defined frequency which is selectively absorbed by the desire... | 12/13/1977 |
| 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) emanating from the ground. This is accomplished ... | 12/13/1977 |
| 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 and, the overlying sedimentary deposits of carbonaceous roc... | 11/22/1977 |
| 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 remote central readout unit. The dosimeter unit is adapted to ... | 10/25/1977 |
| 4053772 | Locating underground uranium deposits Underground uranium deposits are located by placing pairs of dosimeters each about 5 to 18 mg/cm2 thick underground in a grid pattern. Each dosimeter contains a phosphor which is capable of storing the energy of alpha particles. In each pair on... | 10/11/1977 |
| 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 technique. It allows the use of this technique where a sample to b... | 08/30/1977 |
| 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 radiation in at least one tightly collimated beam toward an ... | 07/05/1977 |
| 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 continuous monitoring and correction of the offset of the ... | 06/21/1977 |
| 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 elements of the sample and linearizing circuits having inverse f... | 05/24/1977 |
| 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 trapped at the surface in a series of low profile, dome-sh... | 04/12/1977 |
| 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 formation matrix and formation fluids. Induced gamma rays f... | 02/15/1977 |
| 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 temperature-sensing surveys as used for geothermal reconnaiss... | 01/25/1977 |
| 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 invention is to record a log sensitive to the abundance o... | 11/23/1976 |
| 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 the invention is to record a log sensitive to the abundance... | 11/23/1976 |
| 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 thereafter subjecting the ore particles, while wet, to micro... | 11/16/1976 |
| 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 following 235 U alpha decay to 231 Th whi... | 10/26/1976 |
| 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 mode telemetry signals from one or more radiation detectors ... | 09/14/1976 |
| 3979716 | Means and method for transmitting a high count rate pulse signal over a common well logging cable A conventional type radiation detector in cooperation with a photomultiplier tube provides data pulses of one polarity, corresponding in peak amplitude and number to detected radiation in a borehole traversing an earth formation. Each data pulse is effect... | 09/07/1976 |
| 3976878 | Natural gamma ray spectrum analysis technique In accordance with an illustrative embodiment of the present invention, a method and apparatus is disclosed for determining the presence of a selected number of naturally radioactive materials in an earth formation from the spectrum of natural gamma radia... | 08/24/1976 |
| 3969630 | Method and apparatus for defining radiation-opaque pathways within shielding materials Disclosed is a method and apparatus for providing pathways for electrical conductors and conduits through radiation shielding without effectively diminishing the degree of shielding. A pathway is formed by providing a helical groove on the surface of a cy... | 07/13/1976 |
| 3961187 | Remote sensing of marine hydrocarbon seeps A method of determining the presence of hydrocarbon seeps in the sea from an aircraft or other moving vehicle wherein an intense beam of light from an artificial source such as a laser is directed towards the sea and reflections and/or bioluminescence att... | 06/01/1976 |
| 3942003 | Method and apparatus for the in situ analysis of marine ore concretions For the in situ analysis of marine ore concretions, ore samples are aspirated from the sea floor and introduced in a sample container aboard a carrier body travelling underwater along and in the vicinity of the sea floor. While in the sample container, th... | 03/02/1976 |
| 3940610 | Natural gamma radiation borehole logging system A borehole logging system employs a gamma-ray detector for measuring the natural gamma radiation of the earth formations surrounding a borehole. Three energy band selectors, each employing a discriminator and count rate meter, separate the output of the g... | 02/24/1976 |
