Quotables
"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7430479 | System and method for analyzing content data The system and method provide security and cargo handling personnel a versatile tool to rapidly check cargo for hidden radiological materials, explosives, drugs, and chemical weapons material. Gamma ray emission is stimulated by a pulsed neutron source. The gamma ra... | 09/30/2008 |
| 7313221 | Radiographic equipment The invention concerns radiographic equipment. The equipment includes a source of substantially mono-energetic fast neutrons produced via the deuterium-tritium or deuterium-deuterium fusion reactions, comprising a sealed-tube or similar generator for producing the n... | 12/25/2007 |
| 6825459 | Dual compensated chlorine logging tool A well logging tool has a neutron source for irradiating formation surrounding a borehole. Two detectors are mounted in a spaced-apart vertical relationship within the tool pressure-resistant housing. Each detector detects capture gamma radiation across the entire g... | 11/30/2004 |
| 5098640 | Apparatus and method for detecting contraband using fast neutron activation An apparatus and method non-invasively interrogates an object to detect contraband. The apparatus irradiates the object with fast neutrons of energy greater than 6.7 MeV, and measures the ensuing gamma-ray spectra. Irradiation of the object is accomplishe... | 03/24/1992 |
| 5076993 | Contraband detection system using direct imaging pulsed fast neutrons A system and method for detecting contraband generates a highly collimated beam of pulsed fast neutrons, having a pulse width on the order of a nanosecond, and an energy of 5 to 9 MeV. An object under investigation is scanned with the collimated pulsed be... | 12/31/1991 |
| 4810459 | Method and apparatus for determining true formation porosity from measurement-while-drilling neutron porosity measurement devices A method and apparatus for determining true formation porosity utilize downhole measurement-while-drilling neutron porosity measurement devices. A initial measurement is taken shortly after the formation is bored and before any substantial invasion by the... | 03/07/1989 |
| 4795903 | Analysis of fluids A method and apparatus are provided for analysing a fluid, especially an oil/water/gas mixture of unknown composition flowing in a pipeline (10). The apparatus can operate remotely, for example on the sea bed. A gamma-ray source (12) and a diametrically a... | 01/03/1989 |
| 4746801 | Method and apparatus for differentiating low porosity limestones from high porosity gas sands By taking the ratio of silicon to calcium pulsed neutron capture gamma radiations together with a formation capture cross section measurement, in formations (20) having low hydrogen index, a measurement indicator is provided for differentiating low porosi... | 05/24/1988 |
| 4365154 | Detection of impurities in a fluid containing free gas using nuclear techniques Fluid containing free gas and in a pipeline or container at a refinery or at any of various petroleum producing operations is bombarded with neutrons and high energy gamma rays resulting from capture of thermal neutrons are detected. The spectra of the de... | 12/21/1982 |
| 4239965 | Method and apparatus for neutron induced gamma ray logging for direct porosity identification In a neutron induced gamma ray well logging instrument, a neutron generator is pulsed at a clock frequency of 20 KHz. Each neutron burst produces inelastic scattering gamma rays which are detected during a first time interval coinciding with the neutron s... | 12/16/1980 |
| 4078174 | Neutron borehole logging correction technique In accordance with an illustrative embodiment of the present invention, a method and apparatus is disclosed for logging earth formations traversed by a borehole in which an earth formation is irradiated with neutrons and gamma radiation produced thereby i... | 03/07/1978 |
| 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 the gamma-ray detectors measures the gamma rays produced ... | 01/03/1978 |
| 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 |
| 4002903 | Simultaneous thermal neutron decay time and shale compensated chlorine log system Earth formations surrounding a well borehole are repetitively bombarded with bursts of high energy neutrons. A radiation detector in a sonde in the borehole senses the gamma rays induced by the capture of thermal neutrons and sends representative signals ... | 01/11/1977 |
| 3988581 | Radioactive well logging system with shale (boron) compensation by gamma ray build-up Earth formations in the vicinity of a well borehole are repetitively bombarded with bursts of high energy neutrons. A radiation detector in a sonde in the borehole senses the gamma rays induced by the capture of thermal neutrons and sends signals represen... | 10/26/1976 |
| 3939343 | Pulsed neutron logging system for inelastic scattering gamma rays with gain compensation An illustrative embodiment of the invention includes methods for linearizing the gain of borehole gamma ray energy measurement apparatus. A known energy peak (or peaks) which is prominent in the gamma ray energy spectra of borehole measurements is monitor... | 02/17/1976 |
