The invention relates to a test method and apparatus for measuring the frictional properties of a fluid and comprises; a first specimen holder which is adapted to hold a first specimen in the fluid being tested in contact with a second specimen surface of a second specimen in a second specimen holder, with means for applying a measurable load between the two specimens, and with oscillatory driving means for oscillating at least one of the specimen holders along a first direction, and a motion inducing means, for inducing a motion between the first and second specimen holders in a second direction to induce a compound movement between the specimens which has been found results in more accurate readings. The first specimen holder is connected to a shaft which is induced to move in the first direction being the direction of the length of the shaft and the motion inducing means for inducing a motion in a second direction may be an off-centre counter weight located on the shaft.

A grease testing device for testing oil separation from a grease sample includes a container defining a grease compartment for holding the grease sample. A grease shearer is at least partially positioned in the grease compartment and moves in the grease compartment to shear the grease sample in the grease compartment. A motor is operatively connected to the grease shearer to move the grease shearer in the grease compartment to shear the grease sample. A drain is arranged with respect to the grease compartment to receive oil separated from the grease sample from the grease compartment.

Provided is a monitoring apparatus used to monitor lubricating oil inside a compressor. The monitoring apparatus comprises a first capacitance detector (100), a calculation unit, and a determining unit. The first capacitance detector (100) is disposed in a compressor (10) and is completely immersed in lubricating oil (20) inside the compressor (10), and is used to detect a first capacitance value (Cn). The calculation unit calculates a relative dielectric constant of the lubricating oil inside the compressor according to the first capacitance value (Cn) detected by the first capacitance detector (100). The determining unit monitors, according to the calculated relative dielectric constant, whether quality of the lubricating oil (20) inside the compressor (10) encounters an exception. Further provided are a method for monitoring quality of lubricating oil inside a compressor and an apparatus and a method for monitoring a fluid level of lubricating oil inside a compressor. The monitoring apparatus and method may accurately monitors quality and a fluid level of lubricating oil inside a compressor, thereby reducing a monitoring cost and improving monitoring accuracy.

Provided is a monitoring apparatus used to monitor lubricating oil inside a compressor. The monitoring apparatus comprises a first capacitance detector (100), a calculation unit, and a determining unit. The first capacitance detector (100) is disposed in a compressor (10) and is completely immersed in lubricating oil (20) inside the compressor (10), and is used to detect a first capacitance value (Cn). The calculation unit calculates a relative dielectric constant of the lubricating oil inside the compressor according to the first capacitance value (Cn) detected by the first capacitance detector (100). The determining unit monitors, according to the calculated relative dielectric constant, whether quality of the lubricating oil (20) inside the compressor (10) encounters an exception. Further provided are a method for monitoring quality of lubricating oil inside a compressor and an apparatus and a method for monitoring a fluid level of lubricating oil inside a compressor. The monitoring apparatus and method may accurately monitors quality and a fluid level of lubricating oil inside a compressor, thereby reducing a monitoring cost and improving monitoring accuracy.

A working fluid monitoring system for monitoring a working fluid of working fluid system of a piece of equipment is provided. The working fluid monitoring system can include a filter member having an inlet, an outlet, and a filter media disposed between the inlet and the outlet. The filter member can be configured to permit fluid communication of the working fluid of the working fluid system from the inlet, through the filter media, and out the outlet of the filter member. A sensor is in operable communication with the working fluid within the filter member and is configured to monitor in situ a parameter of the working fluid and/or the working fluid system.

A working fluid monitoring system for monitoring a working fluid of working fluid system of a piece of equipment is provided. The working fluid monitoring system can include a filter member having an inlet, an outlet, and a filter media disposed between the inlet and the outlet. The filter member can be configured to permit fluid communication of the working fluid of the working fluid system from the inlet, through the filter media, and out the outlet of the filter member. A sensor is in operable communication with the working fluid within the filter member and is configured to monitor in situ a parameter of the working fluid and/or the working fluid system.

A process for estimating the lubricant viscosity in a bearing comprises the steps of: monitoring acoustic emissions from the bearing with an acoustic emission sensor; monitoring the bearing for at least one of speed, load and temperature; demodulating the acoustic emission signal from the acoustic emission sensor; calculating the root mean square values of the demodulated acoustic emission signal and storing the calculated root mean square values; aligning the root mean square values with values of one or more of speed, load and temperature and storing the aligned values; using the aligned root mean square values, and at least one of speed, load and temperature in a model which calculates viscosity and/or viscosity ratio from the aligned values.

A process for estimating the lubricant viscosity in a bearing comprises the steps of: monitoring acoustic emissions from the bearing with an acoustic emission sensor; monitoring the bearing for at least one of speed, load and temperature; demodulating the acoustic emission signal from the acoustic emission sensor; calculating the root mean square values of the demodulated acoustic emission signal and storing the calculated root mean square values; aligning the root mean square values with values of one or more of speed, load and temperature and storing the aligned values; using the aligned root mean square values, and at least one of speed, load and temperature in a model which calculates viscosity and/or viscosity ratio from the aligned values.

Disclosed is an experimental device for testing the lubricity in horizontal well drilling with a cuttings bed taken into consideration, which comprises a simulated wellbore with a pulley provided at one end and a hydraulic cylinder fixed and a drill rod mounted at the other end, wherein the drill rod is connected with a driving mechanism and a rotating mechanism, and is provided with thrust and torque sensors; a cuttings feeding port is arranged above the simulated wellbore and connected to a slurry tank through a liquid feeding pipeline, and a high-pressure pump, a flowmeter and a pressure sensor are arranged on the liquid feeding pipeline; the low end of the simulated wellbore is connected with a liquid return pipeline, and a temperature-reducing and pressure-reducing mechanism, a flowmeter and a transfer pump are arranged on the liquid return pipeline; the simulated wellbore is provided with an ultrasonic probe and is connected with a rock core holder that is provided with a heating mechanism, a rock core and a pressure mechanism, and a cuttings lifting platform is provided at the inner side of the lower wall. During the experiment, cuttings and drilling fluid are loaded, the pressure and temperature and the thickness of the cuttings are adjusted, and compound drilling is simulated. The present disclosure is more in line with the actual operating conditions because it not only takes consideration of the friction force between the drill string and the drilling fluid, wellbore wall and slurry cake, but also takes consideration of the friction force between the drill string and the cuttings bed.

Disclosed is an experimental device for testing the lubricity in horizontal well drilling with a cuttings bed taken into consideration, which comprises a simulated wellbore with a pulley provided at one end and a hydraulic cylinder fixed and a drill rod mounted at the other end, wherein the drill rod is connected with a driving mechanism and a rotating mechanism, and is provided with thrust and torque sensors; a cuttings feeding port is arranged above the simulated wellbore and connected to a slurry tank through a liquid feeding pipeline, and a high-pressure pump, a flowmeter and a pressure sensor are arranged on the liquid feeding pipeline; the low end of the simulated wellbore is connected with a liquid return pipeline, and a temperature-reducing and pressure-reducing mechanism, a flowmeter and a transfer pump are arranged on the liquid return pipeline; the simulated wellbore is provided with an ultrasonic probe and is connected with a rock core holder that is provided with a heating mechanism, a rock core and a pressure mechanism, and a cuttings lifting platform is provided at the inner side of the lower wall. During the experiment, cuttings and drilling fluid are loaded, the pressure and temperature and the thickness of the cuttings are adjusted, and compound drilling is simulated. The present disclosure is more in line with the actual operating conditions because it not only takes consideration of the friction force between the drill string and the drilling fluid, wellbore wall and slurry cake, but also takes consideration of the friction force between the drill string and the cuttings bed.