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Class Information
Number: 33/302
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Process > Borehole or tube interior study
Description: Process involving the study of the interior of a borehole or tube.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7386942 |
Method and apparatus for mapping the trajectory in the subsurface of a borehole |
Jun. 17, 2008 |
| 7347003 |
Device to measure axial displacement in a borehole |
Mar. 25, 2008 |
| 7080460 |
Determining a borehole azimuth from tool face measurements |
Jul. 25, 2006 |
| 6860029 |
Length adjustable tool for aligning boring bar |
Mar. 1, 2005 |
| 6704436 |
Method of obtaining a developed two-dimensional image of the wall of a borehole |
Mar. 9, 2004 |
| 6487782 |
Method and apparatus for use in creating a magnetic declination profile for a borehole |
Dec. 3, 2002 |
| 6339886 |
Remotely measured caliper for wellbore fluid sample taking instrument |
Jan. 22, 2002 |
| 6065218 |
Method and apparatus for logging non-circular boreholes |
May. 23, 2000 |
| 6065219 |
Method and apparatus for determining the shape of an earth borehole and the motion of a tool within the borehole |
May. 23, 2000 |
| 6026582 |
Methods and apparatus for mapping pipe and valve bores in a nuclear reactor |
Feb. 22, 2000 |
| 6021577 |
Borehole surveying |
Feb. 8, 2000 |
| 5903147 |
Eddy current array inspection device for shaped holes |
May. 11, 1999 |
| 5806195 |
Rate gyro wells survey system including nulling system |
Sep. 15, 1998 |
| 5657547 |
Rate gyro wells survey system including nulling system |
Aug. 19, 1997 |
| 5640780 |
Moving device for intervening inside small-diameter pipework |
Jun. 24, 1997 |
| 5564193 |
Method of correcting for axial and transverse error components in magnetometer readings during wellbore survey operations |
Oct. 15, 1996 |
| 5548900 |
Measuring instruments |
Aug. 27, 1996 |
| 5543972 |
Mirror for producing a development picture of the wall of a borehole in the ground and device therefor |
Aug. 6, 1996 |
| 5469736 |
Apparatus and method for measuring a borehole |
Nov. 28, 1995 |
| 5442284 |
Process for inspecting spacers of heat exchanger tubes in a heat exchanger |
Aug. 15, 1995 |
| 5398421 |
Method for connecting magnetic measurements performed in a well through a measuring device in order to determine the azimuth thereof |
Mar. 21, 1995 |
| 5329691 |
Hole probe apparatus |
Jul. 19, 1994 |
| 5155916 |
Error reduction in compensation of drill string interference for magnetic survey tools |
Oct. 20, 1992 |
| 5128867 |
Method and apparatus for determining inclination angle of a borehole while drilling |
Jul. 7, 1992 |
| 5012412 |
Method and apparatus for measurement of azimuth of a borehole while drilling |
Apr. 30, 1991 |
| 4992735 |
System and method for inspecting metallic plugs in heat exchanger tubes using a radially extendible probe |
Feb. 12, 1991 |
| 4956921 |
Method to improve directional survey accuracy |
Sep. 18, 1990 |
| 4935883 |
Apparatus and method for leveling a gravity measurement device |
Jun. 19, 1990 |
| 4930223 |
Bend detector pig |
Jun. 5, 1990 |
| 4852262 |
Gauge for in situ measurement of borehole diameter |
Aug. 1, 1989 |
| 4851773 |
Rotating head profilometer probe |
Jul. 25, 1989 |
| 4835876 |
Instrument chassis and body supports for pipeline survey pig |
Jun. 6, 1989 |
| 4833787 |
High speed well surveying and land navigation |
May. 30, 1989 |
| 4799391 |
Method for surveying fluid transmission pipelines |
Jan. 24, 1989 |
| 4780962 |
Pipeline bend verification pig |
Nov. 1, 1988 |
| 4761889 |
Method for the detection and correction of magnetic interference in the surveying of boreholes |
Aug. 9, 1988 |
| 4698911 |
Method of using a borehole televiewer dipmeter for determining true dip and azimuth |
Oct. 13, 1987 |
| 4682421 |
Method for determining the azimuth of a borehole |
Jul. 28, 1987 |
| 4677865 |
Pipe pig with running gear |
Jul. 7, 1987 |
| 4672752 |
Method of determining the difference in borehole azimuth at successive points |
Jun. 16, 1987 |
| 4625165 |
Tube inspection probe with rotating eddy current coil |
Nov. 25, 1986 |
| 4559713 |
Azimuth determination for vector sensor tools |
Dec. 24, 1985 |
| 4524526 |
Apparatus and method for inertial measurement of pipeline deflection |
Jun. 25, 1985 |
| 4490079 |
Method of making a wheel |
Dec. 25, 1984 |
| 4471533 |
Well mapping system and method with sensor output compensation |
Sep. 18, 1984 |
| 4459759 |
Angular rate and position transducer for borehole survey instrument |
Jul. 17, 1984 |
| 4437243 |
Gyroscopic instrument |
Mar. 20, 1984 |
| 4433491 |
Azimuth determination for vector sensor tools |
Feb. 28, 1984 |
| 4393598 |
Borehole tool |
Jul. 19, 1983 |
| 4361192 |
Borehole survey method and apparatus for drilling substantially horizontal boreholes |
Nov. 30, 1982 |
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