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Class Information
Number: 250/254
Name: Radiant energy > Geological testing or irradiation > With drill or drilling
Description: Subject matter which includes apparatus to bore a well and includes methods corresponding to the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7394064 |
Measuring the weight on a drill bit during drilling operations using coherent radiation |
Jul. 1, 2008 |
| 7276715 |
Method and apparatus for safely handling radioactive sources |
Oct. 2, 2007 |
| 7255173 |
Instrumentation for a downhole deployment valve |
Aug. 14, 2007 |
| 7173239 |
Method and apparatus for downhole quantification of methane using near infrared spectroscopy |
Feb. 6, 2007 |
| 6927390 |
Gamma ray spectroscopy logging-while-drilling system |
Aug. 9, 2005 |
| 6918293 |
System and method having radiation intensity measurements with standoff correction |
Jul. 19, 2005 |
| 6907944 |
Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool |
Jun. 21, 2005 |
| 6814162 |
One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices |
Nov. 9, 2004 |
| 6666285 |
Logging-while-drilling apparatus and methods for measuring density |
Dec. 23, 2003 |
| 6648083 |
Method and apparatus for measuring mud and formation properties downhole |
Nov. 18, 2003 |
| 6619395 |
Methods for determining characteristics of earth formations |
Sep. 16, 2003 |
| 6596998 |
Method and system for identifying the source of a signal |
Jul. 22, 2003 |
| 6585044 |
Method, system and tool for reservoir evaluation and well testing during drilling operations |
Jul. 1, 2003 |
| 6403740 |
Vinyl fluoride interpolymers |
Jun. 11, 2002 |
| 6307199 |
Compensation of errors in logging-while-drilling density measurements |
Oct. 23, 2001 |
| 6300624 |
Radiation detector |
Oct. 9, 2001 |
| 6275645 |
Method of and apparatus for subsurface exploration |
Aug. 14, 2001 |
| 6233746 |
Multiplexed fiber optic transducer for use in a well and method |
May. 22, 2001 |
| 6140637 |
Method and apparatus for fluorescence logging |
Oct. 31, 2000 |
| 5912459 |
Method and apparatus for fluorescence logging |
Jun. 15, 1999 |
| 5744803 |
Radiation detector assembly and method with discrimination between vibration and radiation induced events |
Apr. 28, 1998 |
| 5635711 |
Apparatus and method for the suppression of microphonic noise in proportional counters for borehole logging-while-drilling |
Jun. 3, 1997 |
| 5608215 |
Method and apparatus for determining density of earth formations |
Mar. 4, 1997 |
| 5539225 |
Accelerator-based methods and apparatus for measurement-while-drilling |
Jul. 23, 1996 |
| 5517024 |
Logging-while-drilling optical apparatus |
May. 14, 1996 |
| 5486695 |
Standoff compensation for nuclear logging while drilling systems |
Jan. 23, 1996 |
| 5483061 |
Gamma ray scintillation detector apparatus and method for reducing shock induced noise |
Jan. 9, 1996 |
| 5475309 |
Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor |
Dec. 12, 1995 |
| 5473158 |
Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole |
Dec. 5, 1995 |
| 5456106 |
Modular measurement while drilling sensor assembly |
Oct. 10, 1995 |
| 5451779 |
Formation density measurement apparatus and method |
Sep. 19, 1995 |
| 5419395 |
Eccentric fluid displacement sleeve |
May. 30, 1995 |
| 5397893 |
Method for analyzing formation data from a formation evaluation measurement-while-drilling logging tool |
Mar. 14, 1995 |
| 5357797 |
Method and apparatus for correcting MWD porosity measurement |
Oct. 25, 1994 |
| 5351532 |
Methods and apparatus for making chemical concentration measurements in a sub-surface exploration probe |
Oct. 4, 1994 |
| 5321982 |
Method for measuring the rate of penetration of an equipment progressing in a well |
Jun. 21, 1994 |
| 5278550 |
Apparatus and method for retrieving and/or communicating with downhole equipment |
Jan. 11, 1994 |
| 5251708 |
Modular connector for measurement-while-drilling tool |
Oct. 12, 1993 |
| 5250806 |
Stand-off compensated formation measurements apparatus and method |
Oct. 5, 1993 |
| 5216242 |
Apparatus for nuclear logging employing sub wall mounted detectors and modular connector assemblies |
Jun. 1, 1993 |
| 5206505 |
Apparatus and method for retrieving and evaluating a slim hole drilled core sample of a subsurface formation |
Apr. 27, 1993 |
| 5184692 |
Retrievable radiation source carrier |
Feb. 9, 1993 |
| 5175429 |
Stand-off compensation for nuclear MWD measurement |
Dec. 29, 1992 |
| 5165275 |
Compensated gamma ray mudlog |
Nov. 24, 1992 |
| 5144126 |
Apparatus for nuclear logging employing sub wall mounted detectors and electronics, and modular connector assemblies |
Sep. 1, 1992 |
| 5134285 |
Formation density logging MWD apparatus |
Jul. 28, 1992 |
| 5130950 |
Ultrasonic measurement apparatus |
Jul. 14, 1992 |
| 5126564 |
Apparatus for nuclear logging employing sub wall mounted nuclear source container and nuclear source mounting tool |
Jun. 30, 1992 |
| 5091644 |
Method for analyzing formation data from a formation evaluation MWD logging tool |
Feb. 25, 1992 |
| 5061849 |
Externally mounted radioactivity detector for MWD employing radial inline scintillator and photomultiplier tube |
Oct. 29, 1991 |
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