173362 ⎘
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
Sub-classes:TRANSMISSION TOMOGRAPHY FOR STRUCTURE AND MINEROLOGY OF SOLIDS
#2ENHANCED SPINE-AND-RIB PROCESS FOR EVALUATION OF FORMATION DENSITY
#3Lower-density or collimating well-logging radiation detector windows
#4Non-invaded formation density measurement and photoelectric evaluation using an x-ray source
#5Through-tubing, cased-hole sealed material density evaluation using gamma ray measurements
#6Data-driven solutions for inverse elemental modeling
#7Determination of representative elemental length based on subsurface formation data
#8X-ray downhole tool with at least two targets and at least one measurement detector
#9Neutron imaging devices for cased wells and open boreholes
#10High-voltage protection and shielding within downhole tools
#11Apparatus and method for downhole measurement
#12Regulated charged particle beam emitter systems and methods
#13High-voltage protection and shielding within downhole tools
#14Techniques for determining formation composition from measured nuclear spectra
#15Methods and means for fracture mapping in a well bore
#16Rugged semiconductor radiation detector
#17Downhole tool apparatus, system, and methods
#18Cement evaluation with X-ray tomography
#19Downhole energy calibration of gamma ray detectors
#20Temperature performance of a scintillator-based radiation detector system
#21Resolution of detection of an azimuthal distribution of materials in multi-casing wellbore environments
#22Systems and methods for monitoring radiation in well logging
#23Inversion-based workflow for processing nuclear density images in high-angle and horizontal wells
#24Distributed scintillation detector for downhole positioning
#25X-ray downhole tool with at least two targets and at least one measurement detector
#26Dark current correction in scintillator detectors for downhole nuclear applications
#27Formation density tool with a detector operating in total count mode
#28DOWNHOLE LOGGING SYSTEM WITH SOLID STATE PHOTOMULTIPLIER
#29Gamma-ray spectrometer calibration systems and methods
#30Integrated nuclear sensor
#31Dark current correction in scinitillator detectors for downhole nuclear applications
#32Gamma-ray detectors for downhole applications
#33Collocation of radiation generator components for limited-space devices
#34X-ray generator output regulation
#35Scintillator packaging for oilfield use
#36Control of electrically operated radiation generators
#37Optical computing devices comprising rotatable broadband angle-selective filters
#38Apparatus and methods for determining real-time hole cleaning and drilled cuttings density quantification using nucleonic densitometers
#39Using 3D computed tomography to analyze shaped charge explosives
#40Multi-variable workflow for cement evaluation in multiple casing strings
#41System and method for eccentering correction
#42Method and apparatus for downhole photon imaging
#43Flow regime recognition for flow model adaptation
#44Downhole logging system with azimuthal and radial sensitivity
#45Inversion-based workflow for consistent interpretation of nuclear density images in horizontal wells
#46Methods and means for creating three-dimensional borehole image data
#47COLLOCATED RADIATION SENSING
#48Radiation generator having an actively evacuated acceleration column
#49System and method for wellsite core sample analysis
#50Tracers for formation analysis
#51Method and system of determining characteristics of a formation
#52Alpha Processing to Improve Accuracy and Precision of Elemental Concentrations from Gamma-Ray Spectroscopy
#53SOLID STATE PHOTO MULTIPLIER DEVICE
#54Methods and Means for Creating Three-Dimensional Borehole Image Data
#55SCINTILLATOR AND PULSE SHAPE DISCRIMINATION FOR USE WITH THE SCINTILLATOR
#56Shock mounted sensor package with thermal isolation
#57Gamma-ray detectors for downhole applications
#58Downhole sensor tool for logging measurements
#59Nuclear radiation detector calibration downhole
#60Thermal and epithermal neutrons from an earth formation
#61Target extender in radiation generator
#62Well-Logging Tool With First And Second Azimuthal Radiation Detectors And Related Methods
#63Well-logging tool with azimuthal and spectral radiation detectors and related methods
#64Sourceless density measurements with neutron induced gamma normalization
#65Inversion-based workflow for processing nuclear density images in high-angle and horizontal wells
#66Radiation detector for well-logging tool
#67Predicting mineralogy properties from elemental compositions
#68Super-resolution formation fluid imaging data acquisition and processing
#69WELL-LOGGING APPARATUS INCLUDING AXIALLY-SPACED, NOBLE GAS-BASED DETECTORS
#70Well-logging apparatus including azimuthally-spaced, noble gas-based detectors
#71Logging tool
#72Well-logging apparatus with ring-shaped resistors and related methods
#73Gamma-ray detectors for downhole applications
#74Well-logging apparatus including azimuthally spaced radiation detectors
#75Super-resolution formation fluid imaging
#76Method for detecting fractures and perforations in a subterranean formation
#77Apparatus and method for determining formation density from nuclear density measurements made using sensors at more than one location
#78Predicting carbonate rock solid permittivity
#79Sourceless Density Measurement Using Activation
#80Downhole sensor tool for nuclear measurements
#81Gamma-ray detectors for downhole applications
#82Formation evaluation using a bit-based active radiation source and a gamma ray detector
#83Petrophysical evaluation of subterranean formations
#84USE OF SOLID CRYSTALS AS CONTINUOUS LIGHT PIPES TO FUNNEL LIGHT INTO PMT WINDOW
#85Nuclear detectors built directly into shielding or modulating material
#86Combining LWD measurements from different azimuths
#87Buried object evaluating method, underground resources evaluating method, underground waste evaluating method, underground preserved object evaluating method, stratum structure evaluating method and building interior monitoring method, all using hard X-rays or y-rays
#88APPARATUS AND METHOD FOR DETECTION OF FISSIONABLE MATERIALS
#89Geological tomography using cosmic rays
#90Logging tool with response invariant to changes in borehole pressure
#91Radiation monitoring apparatus, systems, and methods
#92Buried object evaluating method, underground resources evaluating method, underground waste evaluating method, underground preserved object evaluating method, stratum structure evaluating method and building interior monitoring method, all using hard X-rays or γ-rays
#93System and method for monitoring integrity of a wellbore