173369 ⎘
Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting reflected or back-scattered neutrons
Sub-classes:Geologic formation neutron porosity system
#2Methods and Means for Neutron Imaging Within a Borehole
#3Method for Combining the Results of Ultrasound and X-Ray and Neutron Cement Evaluation Logs Through Modality Merging
#4METHOD FOR COMBINING THE RESULTS OF ULTRASOUND AND X-RAY AND NEUTRON CEMENT EVALUATION LOGS THROUGH MODALITY MERGING
#5Systems and methods for downhole logging with enhanced sensitivity and azimuthal resolution
#6Method for using neutron interaction cross section to interpret neutron measurements
#7Rotating spectral density tool for behind pipe evaluation
#8Long-lifetime, high-yield, fast neutrons source
#9Data fusion enhanced multi-modality wellbore integrity inspection system
#10Rugged semiconductor radiation detector
#11Wellbore detector with azimuthal and spectral energy resolution
#12Multi-barrier wellbore integrity inspection system with eccentricity correction
#13METHOD FOR COMBINING THE RESULTS OF ULTRASOUND AND X-RAY AND NEUTRON CEMENT EVALUATION LOGS THROUGH MODALITY MERGING
#14Neutron porosity log casing thickness corrections
#15Cement evaluation with X-ray tomography
#16Long-lifetime, high-yield, fast neutrons source
#17In-well monitoring of components of downhole tools
#18Dual-use or position-sensitive helium-3 neutron detector by gas gain manipulation
#19Systems and methods for monitoring changes in a formation while dynamically flowing fluids
#20Distributed scintillation detector for downhole positioning
#21Signal stabilization and calibration for neutron detection
#22Rugged semiconductor radiation detector
#23Neutron-gamma density through normalized inelastic ratio
#24Method for using neutron interaction cross section to interpret neutron measurements
#25Tritium-tritium neutron generator and logging method
#26Method for using neutron interaction cross section to interpret neutron measurements
#27Systems and methods for neutron detection in nuclear logging tools
#28Tracers for formation analysis
#29Neutron and gamma sensitive fiber scintillators
#30Methods and systems for detecting epithermal and thermal neutrons
#31Method for using neutron interaction cross section to interpret neutron measurements
#32Combined Epithermal And Thermal Neutron Detector And Its Application To Well Logging Instruments
#33System and Method for Correction of Borehole Effects in a Neutron Porosity Measurement
#34Single Sensor for Detecting Neutrons and Gamma Rays
#35Measuring total, epithermal and thermal neutron formation porosities with one single set of neutron detectors and a pulsed neutron generator
#36Nanostructured neutron sensitive materials for well logging applications
#37Thermal and epithermal neutrons from an earth formation
#38Borehole fluid effect correction for pulsed neutron porosity measurements
#39Neutron-gamma density through normalized inelastic ratio
#40ELPASOLITE SCINTILLATOR-BASED NEUTRON DETECTOR FOR OILFIELD APPLICATIONS
#41Scintillator-based neutron detector for oilfield applications
#42Single detector detection and characterization of thermal and epithermal neutrons from an earth formation
#43Formation characterization for fast forward neutron models
#44NON-RADIOACTIVE TAGGED CEMENT ADDITIVE FOR CEMENT EVALUATION IN A WELL SYSTEM
#45Neutron Wellbore Imaging Tool
#46NANOSTRUCTURED NEUTRON SENSITIVE MATERIALS FOR WELL LOGGING APPLICATIONS
#47BORON LINER FOR NEUTRON DECTECTORS FOR WELL LOGGING APPLICATIONS
#48Lithology and borehole condition independent methods for locating tagged proppant in induced subterranean formation fractures
#49Neutron porosity measurement devices with semiconductor neutron detection cells and methods
#50Borehole independent neutron porosity measurement
#51Battery pack
#52METHOD OF LOGGING A BOREHOLE AND RELATED APPARATUS
#53Neutron porosity logging tool using microstructured neutron detectors
#54Method and system for pulse neutron capture sigma inversion
#55Apparatus and method for measuring downhole fluid composition and properties
#56NEUTRON POROSITY DEVICE AND MTHOD OF USE FOR REDUCTION OF THE LITHOLOGY AND ENVIRONMENTAL CORRECTIONS
#57Neutron-generator-based thermal neutron porosity device with high porosity sensitivity
#58Device for online measurement of a flow of fast and epithermal neutrons
#59Method and apparatus for neutron logging using a position sensitive neutron detector
#60Neutron porosity downhole tool with improved precision and reduced lithology effects
#61System and method for correction of borehole effects in a neutron porosity measurement
#62Subsurface nuclear measurement systems, methods and apparatus
#63Methods of identifying high neutron capture cross section doped proppant in induced subterranean formation fractures
#64Methods for calibration of pulsed neutron logging
#65Method of investigation of oil and gas-producing wells
#66Configuration design of detector shielding for wireline and MWD/LWD down-hole thermal neutron porosity tools
#67Wide band gap semiconductor photodetector based gamma ray detectors for well logging applications
#68Evaluating a reservoir formation
#69Methods of identifying high neutron capture cross section doped proppant in induced subterranean formation fractures
#70Method of logging a well using a thermal neutron absorbing material
#71Hermetically sealed packaging and neutron shielding for scintillation-type radiation detectors
#72Neutron logging tool having source and target with deuterium-tritium gas admixture
#73Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density
#74Shielded pads for detecting subsurface radiation phenomena
#75Method of acquiring and processing neutron log data, and related apparatuses
#76Method of calibrating multi-channel nuclear energy spectra
#77Borehole invariant porosity measurement method
#78Downhole navigation and detection system
#79Shielded pads for detecting subsurface radiation phenomena
#80Logging tool with a parasitic radiation shield and method of logging with such a tool
#81Method of logging a borehole
#82Pseudogas neutron detector
#83Nanostructured glass ceramic neutron shield for down-hole thermal neutron porosity measurement tools
#84Method and system for integrating logging tool data and digital rock physics to estimate rock formation properties