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Class Information
Number: 250/261
Name: Radiant energy > Geological testing or irradiation > Well testing apparatus and methods > With detector or detector circuit control
Description: Subject matter wherein the means to detect radiation emanating naturally or radiation modified or caused by the material interacting with the radiation includes a detector and may include an electrical circuit responsive to the detector and apparatus to control or compensate for some physical or electrical condition of the radiation detector circuit or detector and circuit and includes methods corresponding to the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7408645 |
Method and apparatus for a downhole spectrometer based on tunable optical filters |
Aug. 5, 2008 |
| 7362422 |
Method and apparatus for a downhole spectrometer based on electronically tunable optical filters |
Apr. 22, 2008 |
| 7253401 |
Spectral gamma ray logging-while-drilling system |
Aug. 7, 2007 |
| 7253402 |
Apparatus and method for determining thermal neutron capture cross section of a subsurface formation from a borehole using multiple detectors |
Aug. 7, 2007 |
| 7006682 |
Apparatus for monitoring particles and method of doing the same |
Feb. 28, 2006 |
| 6686589 |
Fluid density monitor |
Feb. 3, 2004 |
| 6531285 |
Automated detection apparatus with a conveying means for test columns |
Mar. 11, 2003 |
| 6476384 |
Methods and apparatus for downhole fluids analysis |
Nov. 5, 2002 |
| 6373050 |
Focal plane infrared readout circuit with automatic background suppression |
Apr. 16, 2002 |
| 6279660 |
Apparatus for optimizing production of multi-phase fluid |
Aug. 28, 2001 |
| 6087656 |
Radiation detector system and method with stabilized system gain |
Jul. 11, 2000 |
| 6051830 |
Method for stabilizing a scintillation detector |
Apr. 18, 2000 |
| 5744803 |
Radiation detector assembly and method with discrimination between vibration and radiation induced events |
Apr. 28, 1998 |
| 5675147 |
System and method of petrophysical formation evaluation in heterogeneous formations |
Oct. 7, 1997 |
| 5600135 |
Spectral gain stabilization using gross shape features of largely invariant spectra |
Feb. 4, 1997 |
| 5486695 |
Standoff compensation for nuclear logging while drilling systems |
Jan. 23, 1996 |
| 5461230 |
Method and apparatus for temperature compensation of gamma tools in MWD environments |
Oct. 24, 1995 |
| 5422480 |
Method and apparatus for the verification of helium-3 proportional counters |
Jun. 6, 1995 |
| 5406078 |
Induced gamma ray spectorscopy well logging system |
Apr. 11, 1995 |
| 5360975 |
Method of gain regulation for downhole spectroscopy tools without using a calibration source |
Nov. 1, 1994 |
| 5272336 |
Temperature corrections of measurements made with scintillation detectors |
Dec. 21, 1993 |
| 5083301 |
Optical card recording and reproducing device |
Jan. 21, 1992 |
| 5070249 |
Photomultiplier tube mounting for well logging detectors |
Dec. 3, 1991 |
| 5055675 |
Pulse height analyzer for spectroscopy thermal multigate decay well logging system |
Oct. 8, 1991 |
| 5023450 |
Method for discriminating microphonic noise in proportional counters |
Jun. 11, 1991 |
| 5023449 |
Nuclear spectroscopy signal stabilization and calibration method and apparatus |
Jun. 11, 1991 |
| 4992657 |
Apparatus for detecting the cutting horizon for mining machines |
Feb. 12, 1991 |
| 4876450 |
Cryosonde for well logging tool |
Oct. 24, 1989 |
| 4872507 |
Well bore apparatus arranged for operating in high-temperature wells as well as in low-temperature wells |
Oct. 10, 1989 |
| 4766543 |
Well logging direct memory access system and method |
Aug. 23, 1988 |
| 4733082 |
Gamma ray camera methods and apparatus employing cooled scintillation crystal |
Mar. 22, 1988 |
| 4712007 |
Pulsed neutron logging method using cumulative count curves |
Dec. 8, 1987 |
| 4694166 |
Logging device having bimetallic insulating flask |
Sep. 15, 1987 |
| 4656354 |
Method for induced gamma ray logging |
Apr. 7, 1987 |
| 4645926 |
Method for induced gamma ray logging |
Feb. 24, 1987 |
| 4568830 |
Borehole gamma ray logging detector |
Feb. 4, 1986 |
| 4543478 |
Detector pulse forming system for nuclear well logging tools |
Sep. 24, 1985 |
| 4517459 |
Temperature stabilization system for a radiation detector in a well logging tool |
May. 14, 1985 |
| 4503327 |
Combination thermal and radiation shield |
Mar. 5, 1985 |
| 4432929 |
Pulsed neutron generator tube power control circuit |
Feb. 21, 1984 |
| 4315417 |
Borehole logging tool cryostat |
Feb. 16, 1982 |
| 4313317 |
Borehole logging tool cryostat |
Feb. 2, 1982 |
| 4312192 |
Borehole logging tool cryostat |
Jan. 26, 1982 |
| 4245479 |
Temperature stabilization method |
Jan. 20, 1981 |
| 4241592 |
Cryostat for borehole sonde employing semiconductor detector |
Dec. 30, 1980 |
| 4230945 |
Device for detecting ionizing radiation |
Oct. 28, 1980 |
| 4212169 |
Cryostat for superconducting NMR spectrometer |
Jul. 15, 1980 |
| 4209695 |
Detection of impurities in fluid flowing in refinery pipeline or oil production operations using nuclear techniques |
Jun. 24, 1980 |
| 4199953 |
Temperature stabilization system |
Apr. 29, 1980 |
| 4109522 |
Method of borehole logging using passive Josephson current detector to directly determine the presence of hydrocarbons |
Aug. 29, 1978 |
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