VIBRATING WIRE VISCOMETERS
First Claim
Patent Images
1. A vibrating wire viscometer housing, comprising:
- a flowline through the housing to expose a first wire to a downhole fluid;
a cavity in the housing to hold a magnet and to conduct one or more additional wires from the flowline to a signal generator;
first and second electrically conductive posts mechanically coupled to the housing to hold the first wire in tension within the flowline; and
a seal mechanically coupled to the housing to prevent access to the magnet by the downhole fluid.
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Abstract
Vibrating wire viscometers are described. Some example vibrating wire viscometer housings include a flowline through the housing to expose a first wire to a downhole fluid, a cavity in the housing to hold a magnet and to conduct one or more additional wires from the flowline to a signal generator, first and second electrically conductive posts mechanically coupled to the housing to hold the first wire in tension within the flowline, and a seal mechanically coupled to the housing to prevent access to the magnet by the downhole fluid.
13 Citations
22 Claims
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1. A vibrating wire viscometer housing, comprising:
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a flowline through the housing to expose a first wire to a downhole fluid; a cavity in the housing to hold a magnet and to conduct one or more additional wires from the flowline to a signal generator; first and second electrically conductive posts mechanically coupled to the housing to hold the first wire in tension within the flowline; and a seal mechanically coupled to the housing to prevent access to the magnet by the downhole fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A vibrating wire viscometer comprising:
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a signal generator; and a housing comprising a first flowline and a cavity fluidly coupled to the first flowline, wherein a removable sensor block is inserted into the cavity, the removable sensor block comprising; a second flowline which, when inserted into the cavity, substantially aligns with the first flowline; a magnet to generate a magnetic field across the flowline; first and second conductive posts to hold an electrically conductive wire within the second flowline; and first and second signal wires to electrically couple respective ones of the first and second conductive posts to the signal generator.
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21. A vibrating wire viscometer, comprising:
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a metallic housing comprising a cavity and a flowline fluidly decoupled from the cavity; first and second electrically conductive posts electrically insulated from the metallic housing and extending from the cavity to the flowline; an electrically conductive wire held in tension between the first and second electrically conductive posts to vibrate in response to an electrical signal; a magnet in the cavity and extending parallel to the conductive wire; an analyzer electrically coupled to the first and second electrically conductive posts via at least the cavity to determine a viscosity based on the vibration of the electrically conductive wire; and an encapsulation material to fill the cavity to fluidly decouple the cavity from the flowline and from a downhole fluid surrounding the metallic housing.
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22. A vibrating wire viscometer, comprising:
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a housing comprising a flowline to allow a downhole fluid to flow through the flowline; a wire to vibrate in the flowline in response to an alternating current; a cover coupled to the housing; first and second electrically conductive posts to hold the wire in tension in the flowline, wherein the first and second electrically conductive posts are hermetically sealed between the housing and the cover; and an analyzer electrically coupled to the first and second electrically conductive posts to measure a reverse voltage on the wire to determine a viscosity of the downhole fluid.
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Specification