Class 376/166 - Oxygen, carbon

Subclass of Class 376 - Induced nuclear reactions: processes, systems, and elements
Definition: Subject matter wherein the recited nucleus is either oxygen
No. of patents: 39
Last issue date: 09/30/2008

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
7368717	Density detection using real time discrete photon counting for fast moving targets A system for detecting and graphically displaying a contents of a fast-moving target object comprises: a radiation source, having a position such that at least a portion of radiation emitted from the radiation source passes through the fast-moving target object, the...	05/06/2008
7365332	Density detection using real time discrete photon counting for fast moving targets A system for detecting and graphically displaying a contents of a fast-moving target object comprises: a radiation source, having a position such that at least a portion of radiation emitted from the radiation source passes through the fast-moving target object, the...	04/29/2008
7335887	System and method for target inspection using discrete photon counting and neutron detection Described herein is system for the inspection of a target object. The system may include a gamma radiation source, a gamma detector and an image processor coupled to the gamma detector. When the inspection system is operating in a first active mode for imaging a tar...	02/26/2008
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
7186971	Flowshot technique A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors...	03/06/2007
7142625	Nuclear material detection apparatus and method A device for detecting photonuclear-induced neutrons is described herein. One embodiment of the device may comprise a neutron detector and a detection circuit. The neutron detector may comprise a detector output. The detection circuit may be operatively connected to...	11/28/2006
7062074	Method of processing X-ray images A method of processing an X-ray image of articles contained in a transilluminated object and made visible for an observer on a monitor screen, includes the following steps: Placing individual markings about the image of certain, previously determined articles and au...	06/13/2006
6922455	Gas-target neutron generation and applications Described herein are integrated systems for generating neutrons to perform a variety of tasks including: on-line analysis of bulk material and industrial process control (as shown in FIG. 1), security interrogation (as shown in FIG. 2), soil and enviro...	07/26/2005
6909764	Method and apparatus for high-energy generation and for inducing nuclear reactions A system is provided for generating high-energy particles and for inducing nuclear reactions. The system includes a laser and for emitting a laser beam, an irradiation target for receiving the laser beam and producing high-energy particles, and a secondary target fo...	06/21/2005
6909969	Method of through-casing gas detection A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and properties of the well casing. The corrected density log is then combin...	06/21/2005
5373538	System for the detection of substances and in particular explosives by the neutron irradiation thereof System for the detection of substances and in particular explosives, by neutron irradiation thereof. It comprises means (4) for the irradiating, by neutrons, of an object (6) which may contain a substance, means (14) for detecting the gamma radiation whic...	12/13/1994
5343041	Method and apparatus for determining the physical characteristics of a water flow A method and apparatus for studying the flow of water along a well, on the basis of a general spectrum g(t) of gamma ray detection numbers detected in a detection zone over a given detection duration and as a function of time, said gamma rays resulting fr...	08/30/1994
5313504	Neutron and photon monitor for subsurface surveying An apparatus to survey subsurface formations includes a sonde which is configured to move through a borehole. The sonde includes a neutron generator that emits neutrons into the subsurface formations. A crystal detector connected to the sonde monitors the...	05/17/1994
5219518	Nuclear oxygen activation method and apparatus for detecting and quantifying water flow A nuclear spectroscopy method and apparatus for obtaining qualitative and quantitative information related to water flow, comprising the steps of: (1) irradiating the water flow with a source of neutrons of sufficient energy to interact with oxygen atoms in th...	06/15/1993
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
5094808	Oxygen activation downhole tool The invention relates to an apparatus for detecting and measuring water production in oil and gas wells and in injection wells, involving a neutron source for activating oxygen atoms in any water produced or injected in the well, and a plurality of detect...	03/10/1992
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
5008067	Method of downhole neutron monitoring A method of downhole neutron monitoring using an oxygen containing scintillating material to generate scintillator light as a function of electrons and gamma rays emitted from the product of the 16 O (n,p) reaction in a scintillator, converting...	04/16/1991
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
4737636	Simultaneous neutron lifetime and oxygen activation and fluid sampling methods and apparatus to locate fluid flow in a cased well borehole Methods are disclosed herein for determining the point of entry of water cut into a cased well borehole. A well logging sonde is moved past a perforated interval in a cased well borehole. The borehole environment is irradiated with 14 MeV neutrons from a ...	04/12/1988
4574193	Method for logging fluid flow rate, water fraction, and/or salinity of water flowing into a well The disclosure relates to a well logging method which is capable of providing an indication of salinity and water fraction of the production fluid of a borehole. This indication of borehole parameters may be obtained through the use of a conventional gamm...	03/04/1986
4501964	Borehole compensated oxygen activation nuclear well logging Formations adjacent a well borehole are activated with neutrons from a pulsed neutron source in a sonde at an energy level, such as 14 MeV, to energize oxygen present in the formation and borehole, giving rise to gamma radiation from O16 (n,p)N...	02/26/1985
4287415	Measurement of flowing water salinity within or behind wellbore casing Water flowing within or behind a wellbore casing is irradiated with 14 MeV neutrons. Gamma radiation from the isotope nitrogen 16 induced from the O16 (n,p) N16 reaction and either the Na23 (n,଱)F20 or the...	09/01/1981
4233508	Water injection profiling Water injection profiling of a well by nuclear logging is disclosed. A dual detector sonde with a high energy neutron source and a spinner flowmeter is oriented and positioned above and below perforations in the casing of an injection well to monitor upwa...	11/11/1980
4189638	Water injection profiling by nuclear logging Water injection profiling of a well by nuclear logging is disclosed. A dual detector sonde with a high energy neutron source is oriented and positioned above and below perforations in the casing of an injection well to monitor upward and downward flow, re...	02/19/1980
4136279	Method and apparatus for pulsed neutron spectral analysis using spectral stripping A pulsed neutron generator in a well logging instrument is pulsed at a clock frequency of 20 KHz. Inelastic scatter gamma rays are detected during a first time interval coinciding with the neutron source being on and capture gamma rays are measured during...	01/23/1979
4076980	Radioactive well logging to measure earth formation fluid permeability by electrohydraulic induced flow of radiation activated fluids Oxygen in a borehole fluid in the vicinity of a reference region, such as an earth formation of known fluid permeability, is activated with a logging instrument by being bombarded with neutrons of 14 MEV energy level to form the unstable isotope nitrogen ...	02/28/1978
4071757	Detection of behind casing water flow at an angle to the axis of a well borehole Methods and apparatus are disclosed herein for detecting undesired water flow at an angle to the axis of a well borehole. The borehole envisons is irradiated with 14 MEV neutrons resulting in the in situ creation of the radioactive tracer element N16...	01/31/1978
4057720	Behind casing fluid flow detection in producing wells using gas lift Methods are provided for locating and measuring the linear flow velocity and volume flow rate of undesired water production behind casing in a producing well operating on gas lift while the well remains in a producing configuration. A well logging tool si...	11/08/1977
4047028	Resolution of through tubing fluid flow and behind casing fluid flow in multiple completion wells A method is provided for resolving undesired fluid flow in cement channels behind casing in one producing zone of a multi zone completion well operating on gas lift from the fluid flow from lower producing zones in the same well which is contained in prod...	09/06/1977
4035640	Behind casing water flow detection using pulsed neutron oxygen activation Measurement of the linear flow velocity and volume flow rate of undesired behind casing water flow is provided. A well tool having a 14 MEV pulsed neutron source is used to irradiate the earth formations behind well casing with bursts of high energy neutr...	07/12/1977
4032778	Behind casing water volume flow rate measurement using gamma ray spectral degradation Measurement of the distance from a gamma ray detector to a gamma ray source for locating of a channel of undesired behind casing water flow in a producing well is provided. A relationship is given for the count rate ratio at a detector in two distinct ene...	06/28/1977
4032781	Well fluid production profiling using an oxygen activation flow meter Measurement of undesired water cut volume flow rate in a producing well is provided. A well tool having a 14 MEV neutron source and dual spaced gamma ray detectors is used to activate elemental oxygen comprising the molecular structure of the undesired wa...	06/28/1977
4032780	Behind casing water flow detection using continuous oxygen activation Measurement of the volume flow rate and linear flow velocity of undesired behind casing water flow is provided. A well tool having a 14 MEV neutron source is used to continuously irradiate earth formations behind well casing. The continuous neutron irradi...	06/28/1977
4032779	Behind casing water volume flow rate measurement using concentric gamma ray detectors Measurement of the distance from a gamma ray detector to a gamma ray source for location of a channel of undesired behind casing water flow in a producing well is provided. Coaxially aligned dual cylindrical gamma ray detector crystals are used at one or ...	06/28/1977
4028546	Behind well casing water flow detection system Equipment for the detection of undesired behind casing water flow in a producing well is provided. A well logging sonde having a modular fluid tight structure is disclosed. Basically, three modules which when joined together form a fluid tight assemblage ...	06/07/1977
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
3943362	Simultaneous oxygen and silicon neutron activation well log using pulsed neutron source Disclosed is a well logging system for performing a continuous log of the oxygen and silicon content of earth formations in the vicinity of a well bore. A downhole sonde housing a pulsed source of 14 mev neutrons is used to irradiate earth formations in t...	03/09/1976

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Class 376/166 - Oxygen, carbon