Patent ID: 8307698

Claim:
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; the first and second tubes are disposed in a housing to receive the downhole fluid via a housing flowline, wherein the tubes comprise a plurality of supporting seals coupled circumferentially to support the first and second tubes within the housing flowline, and wherein the first and second tubes are immersed in an electrically insulating fluid disposed between the supporting seals, the first and second tubes, and the housing; 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.