Fluid rheology measurement

A method comprising:

• placing a fluid in an annular space defined between a cylindrical housing and a plurality of cylindrical bodies disposed within the cylindrical housing, wherein the cylindrical housing defines a longitudinal axis, the plurality of cylindrical bodies are spaced apart along the longitudinal axis, and each cylindrical body has a different outer diameter;
• after placing the fluid in the annular space, rotating the cylindrical housing while the plurality of cylindrical bodies remain non-rotating;
• and
• for each cylindrical body, measuring a torque applied by the fluid residing in the annular space to the respective cylindrical body in response to rotation of the cylindrical housing.

A system comprising:

• a cylindrical housing defining a longitudinal axis;
• a rotor coupled to the cylindrical housing, the rotor configured to rotate the cylindrical housing about the longitudinal axis;
• and
• a plurality of sensors, each sensor comprising:
• a cylindrical body;
• a torque sensor;
• and
• a shaft coupling the cylindrical body to the torque sensor, wherein the plurality of cylindrical bodies of the respective plurality of sensors are disposed within the cylindrical housing and are spaced apart along the longitudinal axis, wherein the cylindrical housing and the plurality of cylindrical bodies of the respective plurality of sensors define an annular space for holding a fluid, wherein each torque sensor is configured to, while the rotor rotates the cylindrical housing about the longitudinal axis, measure a torque applied by the fluid residing in the annular space to the respective cylindrical body to which the torque sensor is coupled via the respective shaft,
• wherein each cylindrical body has a different outer diameter.