A system and method of determining a density of a drilling fluid in a wellbore. The system includes a drill string in the wellbore, the drill string including a downhole rotor. A drilling fluid flowing through the drill string in the wellbore causes the downhole rotor to rotate relative to the drill string. A brake is configured to apply a first brake torque to the downhole rotor to place the downhole rotor in a first state. A torque measurement system is configured to determine the applied first brake torque. A rotor speed measurement system is configured to measure a first downhole rotor speed of the downhole rotor having the drilling fluid flowing therethrough with the downhole rotor in the first state. A processor is configured to determine a density of the drilling fluid from the measured first downhole rotor speed, and the determined applied first brake torque.

A system and method of determining a density of a drilling fluid in a wellbore. The system includes a drill string in the wellbore, the drill string including a downhole rotor. A drilling fluid flowing through the drill string in the wellbore causes the downhole rotor to rotate relative to the drill string. A brake is configured to apply a first brake torque to the downhole rotor to place the downhole rotor in a first state. A torque measurement system is configured to determine the applied first brake torque. A rotor speed measurement system is configured to measure a first downhole rotor speed of the downhole rotor having the drilling fluid flowing therethrough with the downhole rotor in the first state. A processor is configured to determine a density of the drilling fluid from the measured first downhole rotor speed, and the determined applied first brake torque.

An apparatus for determining a vertical level or density of a material column including one or more of a granular solid, a wet granular solid, a slurry, and a suspension, the apparatus having a support member; and at least one measurement module, wherein the measurement module includes a support arm mounted to the support member and extending outwardly from the support member; a displacer mounted to the support arm, and a force measurement device configured to measure a force attributable to a mass of the displacer mediated by a buoyancy of the displacer in the material column, wherein the measurement module has a data connection to a data processing unit for transmitting measurement data from the measurement module to the data processing unit to generate level or density information about the material column.

The technology relates to a battery cell jig including a spacer, a battery cell volume measuring apparatus including the battery cell jig, and a battery cell volume measuring method performed by using the apparatus. According to the present invention, it is possible to preventing stagnation of water at a space between the battery cell jig and the spacer when measuring the volume change of the battery cell using the principle of Archimedes by including a slit opened along a longitudinal direction in the spacer.

A SAP evaluation apparatus includes: a main body installed with a lifting bar that is raised or lowered; a container portion installed under the lifting bar in the main body and having an internal containing space for containing an absorber; an operating portion connected to the lifting bar and having a lifting plate that is raised or lowered within the containing space and applies pressure to the absorber and an injection portion for injecting an ink in the direction of the absorber; a dispersion measurement portion for measuring the dispersion of the ink through the absorber; and a controller installed at the main body to measure absorption of the ink into the absorber and measure swelling capacity of the absorber while the ink is injected into the absorber.

A viscometer includes first and second capillaries and a valve. In a first state, the valve connects the second capillary to a first fluid injector via the first capillary. In a second state, the valve connects the second capillary to a second fluid injector. A controller receives data indicative of respective pressure drops within the first and second capillaries, and generates a pressure ratio signal therefrom. The controller analyzes the pressure ratio signal to determine an end of a transition between a first equilibrium when the valve is in the first state, and a second equilibrium when the valve is in the second state. The controller defines a measurement window based on the transition end, and therein determines a viscosity of the second fluid based on the pressure ratio signal. The first fluid is a solvent, and the second fluid is a solution of a same solvent and a solute.

A method includes conveying a wellbore fluid into a container of a wellsite system, the container having a float angle hydrometer housed therein and the float angle hydrometer including a buoyant structure, and a measuring component housed within or attached to the buoyant structure. The method further includes determining one or more fluid properties of the wellbore fluid with the float angle hydrometer based on an inclination of the buoyant structure within the wellbore fluid, the one or more fluid properties including at least one of density, specific gravity, or fluid level.

The present invention describes a fluidic device for measuring at least one of corpuscle mass density and weight. The fluidic device comprises a sedimentation chamber fluidly connected to an inlet channel configured to be immersed in a liquid. The fluidic device further comprises a pumping system connected to the sedimentation chamber. The pumping system is adapted to control the flow of liquid in the sedimentation chamber. A processor of the fluidic device is configured to obtain corpuscle data related to a corpuscle in at least one region of the sedimentation chamber; and calculate at least one of corpuscle mass density and weight based on the data received.

Systems and methods for determining fluid density include receiving calibration data for a fluid density measurement tool. The fluid density measurement tool can include a cantilever beam and at least one strain sensor that is coupled to the cantilever beam. The cantilever beam can be housed in the fluid density measurement tool and is buoyed by a fluid that enters the fluid density measurement tool. The systems and methods measure strain values at the at least one strain sensor and determine a density of the fluid based on the calibration data, and the strain values measured at the at least one strain sensor.

Systems and methods for determining fluid density include receiving calibration data for a fluid density measurement tool. The fluid density measurement tool can include a cantilever beam and at least one strain sensor that is coupled to the cantilever beam. The cantilever beam can be housed in the fluid density measurement tool and is buoyed by a fluid that enters the fluid density measurement tool. The systems and methods measure strain values at the at least one strain sensor and determine a density of the fluid based on the calibration data, and the strain values measured at the at least one strain sensor.