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Class Information
Number: 250/269.1
Name: Radiant energy > Geological testing or irradiation > Well testing apparatus and methods > With source and detector
Description: Subject matter in which means to expose the material to radiation in or about the well is also supported by the means to support for movement the means to detect radiation, and includes methods corresponding to the apparatus.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615741 |
Determining organic carbon downhole from nuclear spectroscopy |
Nov. 10, 2009 |
| 7609380 |
Real-time calibration for downhole spectrometer |
Oct. 27, 2009 |
| 7601950 |
System and method for downhole optical analysis |
Oct. 13, 2009 |
| 7599469 |
Non-intrusive pressure gage |
Oct. 6, 2009 |
| 7595876 |
Method and apparatus for estimating a property of a fluid downhole |
Sep. 29, 2009 |
| 7576856 |
Method and apparatus for estimating a property of a fluid downhole |
Aug. 18, 2009 |
| 7573027 |
Measurement of standoff corrected photoelectric factor |
Aug. 11, 2009 |
| 7569810 |
Methods, systems, and computer program products for measuring the density of material |
Aug. 4, 2009 |
| 7534995 |
Device for examining rotor drilled holes |
May. 19, 2009 |
| 7511813 |
Downhole spectral analysis tool |
Mar. 31, 2009 |
| 7507952 |
Apparatus and method for fluid density determination |
Mar. 24, 2009 |
| 7508506 |
Method and apparatus for performing spectroscopy downhole within a wellbore |
Mar. 24, 2009 |
| 7456958 |
Method and apparatus for estimating a property of a fluid downhole |
Nov. 25, 2008 |
| 7446308 |
Method of calibrating multi-channel nuclear energy spectra |
Nov. 4, 2008 |
| 7439494 |
Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole |
Oct. 21, 2008 |
| 7439495 |
Nuclear imaging probe |
Oct. 21, 2008 |
| 7423258 |
Method and apparatus for analyzing a downhole fluid using a thermal detector |
Sep. 9, 2008 |
| 7379180 |
Method and apparatus for downhole spectral analysis of fluids |
May. 27, 2008 |
| 7365308 |
Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentation |
Apr. 29, 2008 |
| 7361887 |
Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentation |
Apr. 22, 2008 |
| 7361886 |
Corrections of gamma-ray responses |
Apr. 22, 2008 |
| 7339160 |
Apparatus and method for analysing downhole water chemistry |
Mar. 4, 2008 |
| 7336356 |
Method and apparatus for downhole spectral analysis of fluids |
Feb. 26, 2008 |
| 7285772 |
Logging tool with a parasitic radiation shield and method of logging with such a tool |
Oct. 23, 2007 |
| 7282704 |
Method for determining formation porosity and gas saturation in a gas reservoir |
Oct. 16, 2007 |
| 7279678 |
Method and apparatus for composition analysis in a logging environment |
Oct. 9, 2007 |
| 7250606 |
Buried object evaluating method, underground resources evaluating method, underground waste evaluating method, underground preserved object evaluating method, stratum structure evaluating meth |
Jul. 31, 2007 |
| 7233001 |
Multi-channel infrared optical phase fraction meter |
Jun. 19, 2007 |
| 7214933 |
Method and apparatus for a downhole fluorescence spectrometer |
May. 8, 2007 |
| 7212283 |
Imaging sensor optical system |
May. 1, 2007 |
| 7196786 |
Method and apparatus for a tunable diode laser spectrometer for analysis of hydrocarbon samples |
Mar. 27, 2007 |
| 7173239 |
Method and apparatus for downhole quantification of methane using near infrared spectroscopy |
Feb. 6, 2007 |
| 7166834 |
Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole |
Jan. 23, 2007 |
| 7139350 |
Method and apparatus for measuring radiation in a borehole |
Nov. 21, 2006 |
| 7102125 |
Method of logging a borehole |
Sep. 5, 2006 |
| 7099503 |
Image reconstruction method and X-ray CT apparatus |
Aug. 29, 2006 |
| 7095012 |
Methods and apparatus for determining chemical composition of reservoir fluids |
Aug. 22, 2006 |
| 7085405 |
Direct tomographic reconstruction |
Aug. 1, 2006 |
| 7084392 |
Method and apparatus for a downhole fluorescence spectrometer |
Aug. 1, 2006 |
| 7075062 |
Apparatus and methods for downhole determination of characteristics of formation fluids |
Jul. 11, 2006 |
| 7075063 |
Determining phase transition pressure of downhole retrograde condensate |
Jul. 11, 2006 |
| 7059404 |
Variable intensity memory gravel pack imaging apparatus and method |
Jun. 13, 2006 |
| 7016026 |
Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer |
Mar. 21, 2006 |
| 7002142 |
Determining dew precipitation and onset pressure in oilfield retrograde condensate |
Feb. 21, 2006 |
| 6995360 |
Method and sensor for monitoring gas in a downhole environment |
Feb. 7, 2006 |
| 6967322 |
Method and apparatus for performing rapid isotopic analysis via laser spectroscopy |
Nov. 22, 2005 |
| 6936812 |
Apparatus and method for determining density, porosity and fluid saturation of formations penetrated by a borehole |
Aug. 30, 2005 |
| 6917303 |
Logging sondes for use in boreholes |
Jul. 12, 2005 |
| 6903330 |
Multi-point subsurface measurement calibration |
Jun. 7, 2005 |
| 6894274 |
Estimation of formation porosity using water measurement |
May. 17, 2005 |
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