ClassID:

173367

G01V5/104 - CPC Classification

Classification description:

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 secondary Y-rays as well as reflected or back-scattered neutrons

Sub-classes:
Recent Application in this class:
#1
20240184011
2024-06-06

METHOD AND APPARATUS FOR OBTAINING FORMATION DENSITY

#2
20230204813
2023-06-29

Method and apparatus for using pulsed neutron generators and dual-function detectors to obtain formation mineralogy

#3
20230194748
2023-06-22

Methods and Means for Simultaneous Casing Integrity Evaluation and Cement Inspection in a Multiple-Casing Wellbore Environment

#4
20210389495
2021-12-16

Systems and methods for determining the presence of cement behind at least one casing using spectroscopy measurement

#5
20210349235
2021-11-11

Methods and Means for Simultaneous Casing Integrity Evaluation and Cement Inspection in a Multiple-Casing Wellbore Environment

#6
20210003737
2021-01-07

Method of and apparatus for determining component weight and/or volume fractions of subterranean rock

#7
20200081149
2020-03-12

Method for using neutron interaction cross section to interpret neutron measurements

#8
20190383962
2019-12-19

Compensated spectroscopy measurements

#9
20190235125
2019-08-01

Systems and methods for determining the presence of cement behind at least one casing using spectroscopy measurement

#10
20190218355
2019-07-18

METHOD FOR PRODUCING A CROSS-LINKED MOULDED BODY FROM UHMWPE

#11
20190204471
2019-07-04

Techniques for determining formation composition from measured nuclear spectra

#12
20190049621
2019-02-14

Methods and Means for Simultaneous Casing Integrity Evaluation and Cement Inspection in a Multiple-Casing Wellbore Environment

#13
20180210110
2018-07-26

Optimization of neutron-gamma tools for inelastic gamma-ray logging

#14
20180066516
2018-03-08

System, method, and computer program product to determine placement of fracture stimulation points using minerology

#15
20170315260
2017-11-02

Method and apparatus for separating gamma and neutron signals from a radiation detector and for gain-stabilizing the detector

#16
20170261638
2017-09-14

Multi-tool analysis of annuluses in cased holes

#17
20170218745
2017-08-03

Programmable integrated measurement while drilling directional controller

#18
20170176635
2017-06-22

Multiple source neutron measurement, device, system and use thereof

#19
20170146684
2017-05-25

Neutron-gamma density through normalized inelastic ratio

#20
20170139075
2017-05-18

Automated control of electrically operated radiation generators

#21
20170002647
2017-01-05

Depth/orientation detection tool and methods thereof

#22
20160349398
2016-12-01

Method for using neutron interaction cross section to interpret neutron measurements

#23
20160334540
2016-11-17

Multi-variable workflow for cement evaluation in multiple casing strings

#24
20160320522
2016-11-03

Radiation generator and power supply configuration for well logging instruments

#25
20160245948
2016-08-25

Casing inspection using pulsed neutron measurements

#26
20160195636
2016-07-07

Absolute elemental concentrations from nuclear spectroscopy

#27
20160154141
2016-06-02

Neutron tool with dual-purpose detector

#28
20160003968
2016-01-07

Directional measurements using neutron sources

#29
20160003025
2016-01-07

Casing inspection using pulsed neutron measurements

#30
20150378050
2015-12-31

Neutron through-pipe measurement, device, system and use thereof

#31
20150378049
2015-12-31

Multiple source neutron measurement, device, system and use thereof

#32
20140353480
2014-12-04

Target assembly including temperature activated coupler and related methods

#33
20140343856
2014-11-20

Borehole fluid effect correction for pulsed neutron porosity measurements

#34
20140332678
2014-11-13

Neutron-gamma density through normalized inelastic ratio

#35
20140090890
2014-04-03

Detection of tool in pipe

#36
20130345983
2013-12-26

Method for cement evaluation with neutron logs

#37
20130327933
2013-12-12

Method for measuring subterranean formation density using a neutron generator

#38
20130299687
2013-11-14

Neutron Wellbore Imaging Tool

#39
20130105679
2013-05-02

DUAL GAMMA RAY AND NEUTRON DETECTOR IN A MULTI-SENSOR APPARATUS AND RELATED METHODS

#40
20130008646
2013-01-10

DEPTH/ORIENTATION DETECTION TOOL AND METHODS THEREOF

#41
20120328078
2012-12-27

Radiograph acquisition device, radiographic imaging system, and radiographic imaging method

#42
20120267520
2012-10-25

Radiation generator and power supply configuration for well logging instruments

#43
20120197529
2012-08-02

Optimization of neutron-gamma tools for inelastic-gamma ray logging

#44
20120126106
2012-05-24

Neutron detection using a shielded gamma detector

#45
20120126105
2012-05-24

Non-rotating logging-while-drilling neutron imaging tool

#46
20120116732
2012-05-10

Method and system for pulse neutron capture sigma inversion

#47
20120059587
2012-03-08

Apparatus and method for measuring downhole fluid composition and properties

#48
20120043966
2012-02-23

Method and apparatus for determining formation water saturation during drilling

#49
20120016588
2012-01-19

Correction for low porosity effects on neutron gamma density

#50
20110285398
2011-11-24

Detection of tool in pipe

#51
20110213555
2011-09-01

Time dependent neutron-gamma spectroscopy

#52
20110204217
2011-08-25

Salt concentration logging systems and methods

#53
20110202276
2011-08-18

Systems and methods for downhole fluid typing with pulsed neutron logging

#54
20110198489
2011-08-18

Lithology pair ratio: a ratio-based lithology indicator using pair production

#55
20110180697
2011-07-28

Time dependent measurement of formation properties using pulsed neutron generators

#56
20110060526
2011-03-10

Downhole tool for determining formation properties

#57
20100262371
2010-10-14

Systems and methods for evaluating formations having unknown or mixed salinity

#58
20090296084
2009-12-03

Borehole measurements using a fast and high energy resolution gamma ray detector assembly

#59
20080179510
2008-07-31

Use of thorium-uranium ratio as an indicator of hydrocarbon source rock

#60
20080179509
2008-07-31

Determining organic carbon downhole from nuclear spectroscopy

#61
20070241275
2007-10-18

Neutron source for well logging

#62
20070144740
2007-06-28

Method and apparatus for fluid influx detection while drilling

#63
20070057171
2007-03-15

Borehole invariant porosity measurement method

#64
20060226351
2006-10-12

Sigma/porosity tools with neutron monitors

#65
20060145695
2006-07-06

Method for fitting a sum of exponentials to experimental data by linearization using a numerical integration approximation, and its application to well log data

#66
20050234649
2005-10-20

Method of correcting density logs for the presence of the casing

#67
20050056774
2005-03-17

Method of logging a borehole

#68
13465105
2016-11-29

Method and system for integrating logging tool data and digital rock physics to estimate rock formation properties