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Class Information
Number: 33/312
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Borehole direction or inclination > Electrical telemetering to read-out
Description: Device including an electrical telemetering circuit for transmitting an indication of the direction or inclination of the borehole to a receiver.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6792382 |
Spirit level |
Sep. 14, 2004 |
| 6351891 |
Miniature directional indication instrument |
Mar. 5, 2002 |
| 5174033 |
Angle sensor for a steerable boring tool |
Dec. 29, 1992 |
| 4999920 |
Surveying of boreholes |
Mar. 19, 1991 |
| 4956921 |
Method to improve directional survey accuracy |
Sep. 18, 1990 |
| 4937518 |
Electrical inclination sensor and a monitoring circuit for the sensor |
Jun. 26, 1990 |
| 4761889 |
Method for the detection and correction of magnetic interference in the surveying of boreholes |
Aug. 9, 1988 |
| 4756088 |
Instruments for monitoring the direction of a borehole |
Jul. 12, 1988 |
| 4709486 |
Method of determining the orientation of a surveying instrument in a borehole |
Dec. 1, 1987 |
| 4696112 |
Bore hole navigator |
Sep. 29, 1987 |
| 4672752 |
Method of determining the difference in borehole azimuth at successive points |
Jun. 16, 1987 |
| 4614040 |
Borehole survey system and method of determining the difference in borehole azimuth at successive points |
Sep. 30, 1986 |
| 4611405 |
High speed well surveying |
Sep. 16, 1986 |
| 4593559 |
Apparatus and method to communicate bidirectional information in a borehole |
Jun. 10, 1986 |
| 4524526 |
Apparatus and method for inertial measurement of pipeline deflection |
Jun. 25, 1985 |
| 4525715 |
Toroidal coupled telemetry apparatus |
Jun. 25, 1985 |
| 4493155 |
Apparatus for remotely indicating angular position |
Jan. 15, 1985 |
| 4472884 |
Borehole azimuth determination using magnetic field sensor |
Sep. 25, 1984 |
| 4471533 |
Well mapping system and method with sensor output compensation |
Sep. 18, 1984 |
| 4468863 |
High speed well surveying |
Sep. 4, 1984 |
| 4468665 |
Downhole digital power amplifier for a measurements-while-drilling telemetry system |
Aug. 28, 1984 |
| 4461088 |
Survey apparatus and method employing canted tilt sensor |
Jul. 24, 1984 |
| 4459760 |
Apparatus and method to communicate information in a borehole |
Jul. 17, 1984 |
| 4459759 |
Angular rate and position transducer for borehole survey instrument |
Jul. 17, 1984 |
| 4457077 |
Borehole gradiometer |
Jul. 3, 1984 |
| 4452075 |
Push drill guidance indication apparatus |
Jun. 5, 1984 |
| 4437243 |
Gyroscopic instrument |
Mar. 20, 1984 |
| 4428125 |
Inclination indicating apparatus |
Jan. 31, 1984 |
| 4393598 |
Borehole tool |
Jul. 19, 1983 |
| 4381610 |
Self-contained downhole compass |
May. 3, 1983 |
| 4361192 |
Borehole survey method and apparatus for drilling substantially horizontal boreholes |
Nov. 30, 1982 |
| 4344235 |
Levitated ball inclinometer |
Aug. 17, 1982 |
| 4335520 |
Survey spar system for precision offshore seafloor surveys |
Jun. 22, 1982 |
| 4302886 |
Gyroscopic directional surveying instrument |
Dec. 1, 1981 |
| 4293815 |
Fluxgate magnetometer circuit with earth's field elimination |
Oct. 6, 1981 |
| 4265028 |
Survey apparatus and method employing canted tilt sensor |
May. 5, 1981 |
| 4244116 |
Devices for measuring the azimuth and the slope of a drilling line |
Jan. 13, 1981 |
| 4238889 |
Devices for the azimuth and slope scanning of a drilling line |
Dec. 16, 1980 |
| 4224573 |
Electric circuit device and pendulum unit incorporating such devices |
Sep. 23, 1980 |
| 4130942 |
Borehole surveying apparatus |
Dec. 26, 1978 |
| 4110912 |
Triaxial deflection meter |
Sep. 5, 1978 |
| 4071959 |
Gyro-stabilized single-axis platform |
Feb. 7, 1978 |
| 4069591 |
Elastomeric inclinometer |
Jan. 24, 1978 |
| 4051456 |
Apparatus for establishing and maintaining electric continuity in drill pipe |
Sep. 27, 1977 |
| 4040189 |
Method and apparatus for leveling an instrument in a well bore |
Aug. 9, 1977 |
| 3935643 |
Methods of and means for measuring angles |
Feb. 3, 1976 |
| 3935642 |
Directional drilling of bore holes |
Feb. 3, 1976 |
| 3930545 |
Tiltable coupling |
Jan. 6, 1976 |
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