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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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,...
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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 O 16 (n,p) N 16 reaction and either the Na 23 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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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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...
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3928762 |
Pulsed neutron combination well logging system
A pulsed neutron combination well logging system for performing simultaneous logs of hydrogen/oxygen ratio, chlorine log, and thermal neutron decay time is disclosed. A downhole pulsed neutron...
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3925659 |
Inelastic gamma ray logging system
An illustrative embodiment of the invention includes a system for providing inelastic neutron gamma ray measurements in a well borehole. A pulsed neutron source is used to irradiate earth...
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3852593 |
PULSED NEUTRON CAPTURE LOGGING FOR DETERMINING RESIDUAL OIL
A method for determining residual oil saturation in a formation using a pulsed neutron capture logger and making two measurements, the first measurement being made with the indigenous fluid in...
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3849646 |
INELASTIC NEUTRON SCATTERING METHODS TO LOCATE COAL AND OIL SHALE ZONES
A pulsed source of high energy neutrons is used to irradiate the earth formations in the vicinity of a well borehole. Gamma rays produced by the inelastic scattering of the fast neutrons are...
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3829687 |
RADIOACTIVE WELL LOGGING TO DISTINGUISH WATER AND HYDROCARBON SATURATION BY DELAYED NEUTRONS FROM OXYGEN
A well logging process for exploring for petroleum hydrocarbons in which subterranean formations are characterized with regard to their hydrocarbon or water saturation on the basis of their oxygen...
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3825753 |
METHOD FOR PROVIDING A NATURAL GAMMA-RAY LAG IN CONJUNCTION WITH ASSAY OPERATIONS WITHIN A BOREHOLE
A borehole logging tool is utilized to assay the formations surrounding the borehole by operating a pulsed neutron source to irradiate the formations with bursts of neutrons. A neutron detector...
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3817328 |
NEUTRON ABSORPTION AND OXYGEN LOG FOR MEASURING OIL CONTENT OF FORMATION
This invention discloses a method for accurately determining changes in the fractional-volume oil and gas content of a reservoir from a cased well bore. The first step of the invention is to record...
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3801816 |
WELL LOGGING SYSTEM AND METHOD
A radioactivity well logging system is provided for making both a conventional log and a novel spectral analysis of the activation-produced radiation during the same trip through the borehole. The...
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3796877 |
NEUTRON-INELASTIC GAMMA RADIATION WELL LOGGING METHOD AND APPARATUS WITH BACKGROUND ACCOUNTED FOR
Methods and apparatus are provided for making improved pulsed neutron derived measurements of the carbon:oxygen ratio in subsurface earth formations. Plural radiation measurements are made as a...
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3710112 |
METHOD OF INDIRECTLY MONITORING THE OUTPUT OF A PULSED NEUTRON SOURCE
The specification discloses a borehole tool for assaying for uranium and having a pulsed neutron source of the accelerator type and a detector for detecting delayed fission neutrons. In operation,...
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3688117 |
METHOD OF AND SYSTEM FOR INDIRECTLY MONITORING THE OUTPUT OF A PULSED NEUTRON SOURCE
The specification discloses a borehole tool for assaying for uranium and having a pulsed neutron source of the accelerator type and a detector for detecting delayed fission neutrons. In operation,...
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3514598 |
WELL LOGGING SYSTEM AND METHOD FOR DETERMINING PRESENCE OF SODIUM BY DIFFERENTIATING BETWEEN FLUORINE-20 AND NITROGEN-16
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3465151 |
METHOD AND APPARATUS FOR OXYGEN ACTIVATION WELL LOGGING
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3452201 |
ENERGY LEVEL SELECTIVE ACTIVATION RADIOACTIVITY ANALYSIS SUITABLE FOR BOREHOLE LOGGING
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3294972 |
Neutron-gamma borehole logging method and apparatus for identifying elements in borehole formations
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3171961 |
Nuclear resonance fluorescence logging
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2948810 |
Delayed gamma radiation log of oxygen
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