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Class Information
Number: 73/152.35
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > Fluid flow measuring or fluid analysis > Rate of fluid flow > Rotary > Magnetic
Description: Subject matter wherein motion of the rotary element is detected by sensing magnetic properties or wherein the apparatus includes means having magnetic properties.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6712140 |
3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys |
Mar. 30, 2004 |
| 5675488 |
Location determination using vector measurements |
Oct. 7, 1997 |
| 5216924 |
Passive flowmeter for determining the flow rate and the direction of flow in a well |
Jun. 8, 1993 |
| 4852401 |
Well fluid flow velocity measuring apparatus including a spinner cartridge assembly |
Aug. 1, 1989 |
| 4827765 |
Motor driven spinner flow meter |
May. 9, 1989 |
| 4754642 |
High temperature fluid flow speed detection apparatus |
Jul. 5, 1988 |
| 4566317 |
Borehole flow meter |
Jan. 28, 1986 |
| 4441361 |
Method and apparatus for measurement of fluid density and flow rates in multi-phase flow regimes |
Apr. 10, 1984 |
| 4345480 |
Rotary flow meter |
Aug. 24, 1982 |
| 3982433 |
Spinner tool for boreholes |
Sep. 28, 1976 |
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