Matches 1 - 35 out of 35

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US20140034823 NON-RADIOACTIVE TAGGED CEMENT ADDITIVE FOR CEMENT EVALUATION IN A WELL SYSTEM  
An inert (non-radioactive) tagging material can be added to cement in a wellbore. The non-radioactive tagging material can emit radiation at a specific energy level when irradiated with radiation....
US20090108192 Tritium-Tritium Neutron Generator Logging Tool  
A neutron generator system is provided that uses substantially only the T-T fusion reaction to generate neutrons for a neutron borehole tool.
US20090057545 Downhole Tools with Solid-State Neutron Monitors  
A nuclear tool includes a tool housing; a neutron generator disposed in the tool housing; and a solid-state neutron monitor disposed proximate the neutron generator for monitoring the output of...
US20090146052 Low Power Neutron Generators  
A neutron generator and method of constructing the same. The generator includes a grid configured to produce an ionizable gas when heated by electrons impinging thereon. A cathode emits electrons...
US20090045329 Downhole Tools Having Combined D-D and D-T Neutron Generators  
A nuclear tool includes a tool housing; a d-D neutron generator disposed in the tool housing; a d-T neutron generator disposed in the tool housing; and, optionally, a control circuit for...
US20130187035 WELL-LOGGING APPARATUS INCLUDING AZIMUTHALLY SPACED RADIATION DETECTORS  
A well-logging device may include a housing to be positioned within a larger borehole of a subterranean formation and thereby define a stand-off distance with respect to the larger borehole. The...
US20100180662 COMPOSITE MATERIALS AND CALIBRATION ASSEMBLIES USING THE SAME  
Example composite materials and calibration assemblies using the same. An example calibration assembly for use in calibrating a downhole formation evaluation tool includes a first body comprising...
US20090205825 METHOD OF LOGGING A WELL USING A THERMAL NEUTRON ABSORBING MATERIAL  
A method for determining the location and height of a fracture in a subterranean formation using a neutron emitting logging tool. The method includes obtaining a pre-fracture data set, fracturing...
US20120175511 METHOD FOR MONITORING OR TRACING OPERATIONS IN WELL BOREHOLES  
The present invention relates to novel methods for monitoring or tracing a job operation performed in a borehole, such as well boreholes traversing a geological formation. In one embodiment, the...
US20090248309 EVALUATING A RESERVOIR FORMATION  
In general, in one aspect, the invention relates to a method for evaluating a volcanic reservoir formation having volcanic rock forming elements and a borehole penetrating the volcanic reservoir...
US20130256522 TITANIUM BASED GAS RESERVOIR FOR LOW POWER SEALED TUBE NEUTRON GENERATORS  
A pulsed neutron generator includes a sealed tube. a gas reservoir is disposed in the sealed tube and includes an electrically heatable filament disposed within a porous, sintered getter. The...
US20130048848 Multiposition Target Plane for Variable Source-Detector Distance Using DD, DT Sealed Neutron Source  
Method and apparatus for evaluating an earth formation using at least one detector with a pulsed neutron source that includes a beam of deuterium ions that can be directed to a selected position...
US20120043459 USING LWT SERVICE TO IDENTIFY LOSS CIRCULATION AREAS IN A WELLBORE  
The present disclosure relates to apparatus and methods for evaluating an earth formation though a drillstring during tripping of the drillstring, particularly locating an area of circulation loss...
US20140319330 ELPASOLITE SCINTILLATOR-BASED NEUTRON DETECTOR FOR OILFIELD APPLICATIONS  
Embodiments described herein are directed to methods and neutron detectors for use in downhole and other oilfield applications. In particular, the neutron detector includes a scintillator formed...
US20120075953 METHOD AND APPARATUS FOR EVALUATING A CEMENTED BOREHOLE CASING  
A method of evaluating a cased borehole in an earth formation includes: emitting at least one acoustic signal into the borehole via an acoustic source and detecting a return acoustic signal via an...
US20110186723 Apparatus and Method for Pulsed Neutron Generation Including a High Voltage Power Supply  
An apparatus for estimating at least one property of an earth formation is disclosed. The apparatus includes: a carrier configured to be disposed in the formation; a neutron tube disposed at the...
US20110186722 Apparatus and Method for Pulsed Neutron Generation Including a High Voltage Power Supply  
An apparatus for irradiating an earth formation is disclosed. The apparatus includes: a carrier configured to be disposed in the formation; a neutron tube disposed at the carrier and located on an...
US20100276581 BOREHOLE NEUTRON GENERATOR WITH UNIQUE ELECTRODE STRUCTURE AND D-D, T-T OR D-T REACTANTS  
An apparatus for performing an operation in a borehole penetrating the earth, the apparatus having: a carrier configured for conveyance through the borehole; and a neutron source disposed at the...
US20100230585 NOVEL CONFIGURATION DESIGN OF DETECTOR SHIELDING FOR WIRELINE AND MWD/LWD DOWN-HOLE THERMAL NEUTRON POROSITY TOOLS  
An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus includes: a carrier configured to be conveyed through the borehole; a neutron source disposed...
US20100193675 NEUTRON SHIELDING FOR DOWNHOLE TOOL  
A downhole tool for performing measurement of a formation. The tool comprising a housing surrounding a source for generating neutrons and a detector for detecting the neutrons. A shield is located...
US20100155589 Downhole Nuclear Tool  
In one aspect of the invention, a downhole tool string component comprises a tubular body with a first and a second tool joint adapted to connect to adjacent tool string components, and a central...
US20170167243 CEMENT EVALUATION WITH NEUTRON-NEUTRON MEASUREMENT  
Various embodiments include apparatus and methods to conduct neutron-neutron measurements and to evaluate quality of cement between a casing and a formation. A tool can include a neutron source, a...
US20160231457 TRITIUM-TRITIUM NEUTRON GENERATOR AND LOGGING METHOD  
A well logging tool includes a neutron generator to generate and emit energetic neutrons using substantially exclusively a T-T fusion reaction. The well logging tool can include measuring...
US20160154141 NEUTRON TOOL WITH DUAL-PURPOSE DETECTOR  
Various embodiments include apparatus and methods to conduct measurements on a formation using a dual purpose detector. The dual purpose detector can be disposed on a neutron tool in a borehole,...
US20150226875 Single Sensor for Detecting Neutrons and Gamma Rays  
A logging system for imaging a subterranean formation that includes radiation sources that emit different energy levels of radiation into the formation. The radiation scatters from the formation...
US20140124659 SCINTILLATOR-BASED NEUTRON DETECTOR FOR OILFIELD APPLICATIONS  
Borehole logging tools and systems that include a scintillator positioned to interact with scattered source neutrons that are received from a target formation. The scintillator emits luminescence...
US20130299687 Neutron Wellbore Imaging Tool  
A method and apparatus for obtaining neutron images of a rock formation are provided. The neutron images can be obtained from a tool which need not rotate to obtain neutron data from a plurality...
US20130206972 NEUTRON DETECTION BASED ON A BORON SHIELDED GAMMA DETECTOR  
A method is provided to detect neutrons using a boron-shielded gamma-ray detector, which will detect the 0.48-MeV prompt gamma ray due to the 10B (n,α)7Li reaction. The gamma ray detector can be a...
US20130075600 NANOSTRUCTURED NEUTRON SENSITIVE MATERIALS FOR WELL LOGGING APPLICATIONS  
Disclosed is an apparatus for detecting a neutron. The apparatus includes: a neutron interaction material configured to emit a charged particle upon absorbing a neutron; a plurality of...
US20130068941 BORON LINER FOR NEUTRON DECTECTORS FOR WELL LOGGING APPLICATIONS  
Disclosed is an apparatus for detecting neutrons. The apparatus includes a plurality of neutron detector cells, each detector cell comprising a cathode surrounding an anode wherein the cathode of...
US20120126105 NON-ROTATING LOGGING-WHILE-DRILLING NEUTRON IMAGING TOOL  
A method and apparatus for obtaining neutron images of a rock formation are provided. The neutron images can be obtained from a tool in a logging-while-drilling system but which need not rotate to...
US20110313668 NEUTRON POROSITY DEVICE AND MTHOD OF USE FOR REDUCTION OF THE LITHOLOGY AND ENVIRONMENTAL CORRECTIONS  
Systems, methods, and devices for determining the porosity of a subterranean formation with reduced lithology error are provided. In one example, a downhole tool for such purposes may include a...
US20110297818 NEUTRON-GENERATOR-BASED THERMAL NEUTRON POROSITY DEVICE WITH HIGH POROSITY SENSITIVITY  
Systems, methods, and devices for determining porosity with high sensitivity are provided. In one example, a downhole tool with such high porosity sensitivity may include a neutron source, a near...
US20110272570 Method and Apparatus for Neutron Logging Using a Position Sensitive Neutron Detector  
A neutron logging tool includes a neutron source and at least one position sensitive thermal or epithermal neutron detector. The logging tool further includes an electronic controller configured...
US20110238313 SYSTEM AND METHOD FOR CORRECTION OF BOREHOLE EFFECTS IN A NEUTRON POROSITY MEASUREMENT  
Systems, methods, and devices for determining a porosity of a subterranean formation corrected for borehole effects are provided. One such device may be a downhole tool capable of being lowered...
Matches 1 - 35 out of 35