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Class Information
Number: 250/268
Name: Radiant energy > Geological testing or irradiation > Well testing apparatus and methods > With well-engaging means
Description: Subject matter which includes means to touch the wall of the well, the means to support for movement suspending the means to touch the well and the means to detect radiation as a common unit within the well and methods corresponding to the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7339161 |
Shielded pads for detecting subsurface radiation phenomena |
Mar. 4, 2008 |
| 7276715 |
Method and apparatus for safely handling radioactive sources |
Oct. 2, 2007 |
| 7173239 |
Method and apparatus for downhole quantification of methane using near infrared spectroscopy |
Feb. 6, 2007 |
| 6917303 |
Logging sondes for use in boreholes |
Jul. 12, 2005 |
| 6702010 |
Apparatus and method for actuating arms |
Mar. 9, 2004 |
| 6538958 |
Method and apparatus for acoustics logging of fluid density and wet cement plugs in boreholes |
Mar. 25, 2003 |
| 6308561 |
Well logging apparatus |
Oct. 30, 2001 |
| 6140637 |
Method and apparatus for fluorescence logging |
Oct. 31, 2000 |
| 5925879 |
Oil and gas well packer having fiber optic Bragg Grating sensors for downhole insitu inflation monitoring |
Jul. 20, 1999 |
| 5912459 |
Method and apparatus for fluorescence logging |
Jun. 15, 1999 |
| 5910654 |
Apparatus and method for measuring formation density in rugose boreholes |
Jun. 8, 1999 |
| 5663559 |
Microscopy imaging of earth formations |
Sep. 2, 1997 |
| 5532481 |
System for measuring epithermal neutron porosity having reduced borehole effect |
Jul. 2, 1996 |
| 5419395 |
Eccentric fluid displacement sleeve |
May. 30, 1995 |
| 5404752 |
Method for measuring the velocity of water flow through nested conduits |
Apr. 11, 1995 |
| 5371363 |
Device for measuring radiation within a pipe |
Dec. 6, 1994 |
| 5300770 |
Apparatus for producing a porosity log of a subsurface formation corrected for detector standoff |
Apr. 5, 1994 |
| 5204529 |
Method and apparatus for measuring borehole fluid density, formation density and/or borehole diameter using back-scattered gamma radiation |
Apr. 20, 1993 |
| 5198770 |
Logging apparatus having a wall engaging pad with longitudinally aligned detecting devices |
Mar. 30, 1993 |
| 5153431 |
Well logging radioactive detector assembly |
Oct. 6, 1992 |
| 5101104 |
Carrier apparatus for radioactive well logging instrument |
Mar. 31, 1992 |
| 5092423 |
Downhole seismic array system |
Mar. 3, 1992 |
| 5090039 |
Inspecting coiled tubing for well operations |
Feb. 18, 1992 |
| 5068531 |
Method and apparatus for producing a porosity log of a subsurface formation corrected for detector standoff |
Nov. 26, 1991 |
| 4978851 |
Method and apparatus for measuring subsurface characteristics using pulsed neutron/gamma ray logging |
Dec. 18, 1990 |
| 4939362 |
Borehole fluid density well logging means and method |
Jul. 3, 1990 |
| 4862090 |
Measuring pad arrangement for a logging sonde |
Aug. 29, 1989 |
| 4692617 |
Method and system for neutron lifetime logging |
Sep. 8, 1987 |
| 4588951 |
Arm apparatus for pad-type logging devices |
May. 13, 1986 |
| RE32070 |
Borehole apparatus for investigating subsurface earth formations including a plurality of pad members and means for regulating the bearing pressure thereof |
Jan. 21, 1986 |
| 4506219 |
Borehole tool outrigger arm displacement control mechanism |
Mar. 19, 1985 |
| 4486658 |
Water flow well logging sonde and method of water flow sensing |
Dec. 4, 1984 |
| 4480186 |
Compensated density well logging tool |
Oct. 30, 1984 |
| 4432143 |
Well logging apparatus |
Feb. 21, 1984 |
| 4342911 |
Focused nuclear interface survey instrument and method of determining density changes in mining and storage wells |
Aug. 3, 1982 |
| 3984147 |
Mining machines with extensible probe arm |
Oct. 5, 1976 |
| 3978939 |
Acoustic well logging methods and apparatus |
Sep. 7, 1976 |
| 3932747 |
Nonfluid-filled borehole logging apparatus |
Jan. 13, 1976 |
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