Vibrating wire viscometers
AssigneeSchlumberger Technology Corporation
InventorsNORIYUKI MATSUMOTO, SOPHIE NAZIK GODEFROY, KAZUMASA KATO, GO FUJISAWA
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Abstract
Vibrating wire viscometers are disclosed. An example vibrating wire viscometer includes first and second electrically conductive tubes, where the first tube is at least partially inserted into the second tube, and where the first and second tubes are coupled via an electrically insulating bonding agent. The example viscometer further includes first and second electrically conductive pins inserted into respective ones of the first and second tubes, and an electrically conductive wire fastened to the first and second pins to vibrate in a downhole fluid to determine a viscosity of the downhole fluid.
Claims20
A vibrating wire viscometer, comprising:
- first and second electrically conductive tubes, wherein the first electrically conductive tube is at least partially inserted into the second electrically conductive tube, and wherein the first and second electrically conductive tubes are coupled via an electrically non-conductive bonding agent;
- first and second electrically conductive pins inserted into respective ones of the first and second tubes;
- and
- an electrically conductive wire fastened to the first and second pins to vibrate in a downhole fluid to determine a viscosity of the downhole fluid.
A vibrating wire viscometer, comprising:
- first and second electrically conductive tubes disposed in a housing, wherein the first tube is at least partially inserted into the second tube, and wherein the first and second tubes are coupled via an electrically insulating bonding agent;
- first and second electrically conductive pins inserted in parallel into respective ones of the first and second tubes;
- an electrically conductive wire held in tension between the first and second pins to vibrate in a downhole fluid in the first and second tubes;
- a magnet to generate a magnetic field adjacent the wire;
- a signal processor to generate an electrical signal to cause the wire to vibrate at a resonance frequency in the magnetic field;
- and
- an analyzer to measure a reverse voltage of the wire to determine a viscosity of the downhole fluid.
A vibrating wire viscometer, comprising:
- first and second electrically conductive tubes, wherein the first tube is at least partially inserted into the second tube, and wherein the first and second tubes are coupled via an electrically insulating bonding agent;
- first and second electrically conductive pins inserted into respective ones of the first and second tubes;
- an electrically conductive wire held in tension between the first and second pins to vibrate in a downhole fluid in the first and second tubes;
- and
- a housing comprising:
- a flowline, wherein the first and second tubes are disposed in the flowline;
- a magnet disposed in the housing to generate a magnetic field adjacent the wire;
- a signal processor to generate an electrical signal to vibrate the wire in the magnetic field at a resonance frequency;
- and
- an analyzer to measure a reverse voltage on the wire to determine a viscosity of the downhole fluid.
Dependencies are inferred from the claim text.