System and methods for analyzing a multiphase production fluid include a fluidic supply and analysis unit configured to transition the fluidic separation chamber to a static state after a complete gaseous phase column and a complete oil phase column are formed within the fluidic separation chamber; communicate with the fluidic separation detector to measure the absolute or relative sizes of the complete gaseous phase column and the complete oil phase column; and calculate an oil/gas volume fraction as a function of the measured sizes of the gaseous phase and oil phase columns in the fluidic separation chamber.

A deterioration estimation device includes a storage device and an execution device. The storage device is configured to store mapping data defining a mapping that outputs an output variable indicating the degree of deterioration of oil when an input variable is input. The mapping includes, as the input variable, a color variable that is a variable indicating a color of the oil and a hydrogen ion variable that is a variable indicating a hydrogen ion concentration of the oil. The execution device is configured to execute an acquisition process that is a process of acquiring the input variable and a calculation process of inputting the input variable acquired through the acquisition process to the mapping to output a value of the output variable.

A transformer simulation system and a measurement method for setting value simulation are disclosed. The transformer simulation system includes an oil tank, a heating device, a pump body, a first oil pipe, a second oil pipe and a first flow sensor. The heating device is disposed in the oil tank. The oil tank is provided with a first inlet and a first outlet, the first outlet is connected to the first oil pipe, and the first inlet is connected to the second oil pipe. An end of the first oil pipe away from the oil tank is a first mounting end for being connected to an oil inlet of a gas relay, and an end of the second oil pipe away from the oil tank is a second mounting end for being connected to an oil outlet of the gas relay. The pump body is connected to the first oil pipe or the second oil pipe, and the first flow sensor is disposed in the first oil pipe. The above-described transformer simulation system can measure the oil flow velocity, that is the setting value of the gas relay, and the type of the insulation oil in the oil tank can be replaced, then the corresponding setting value of the gas relay is obtained, so as to prevent the original gas relay from not playing the role of the protection due to a different property of the insulation oil.

Provided is a method for determining air release performance of a lubricating oil. The method involves determining air release time of the lubricating oil in accordance with ASTM D3427 at a designated temperature; determining surface tension of the lubricating oil at the temperature used in ASTM D3427; determining kinematic viscosity of the lubricating oil in accordance with ASTM D445 at the temperature used in ASTM 3427; and utilizing the surface tension, ASTM D3427 air release time, and ASTM D445 kinematic viscosity to determine air release performance of the lubricating oil. Surface tension is correlated with ASTM D3427 air release time at an ASTM D445 kinematic viscosity of at least about 30 cSt. The method has higher measurement sensitivity and reproducibility/repeatability than ASTM D3427.

A system for indicating content within a fluid container provides an improved fuel container for mixed fuel, which indicates its contents to a user. The system communicates whether there is oil, gas, a mixture of the two, or nothing inside the container. When the system is filled with gas only, the color of the can will change to, or otherwise remain, a first color. Similarly, oil alone would be indicated by a unique color. When a user combines oil and gas, the system changes to a new color to let the user know that oil is indeed inside the receptacle of the apparatus. Alternatively, the system may provide a nozzle equipped with the same color-indicating capabilities as the fuel receptacle embodiment. For example, when oil is mixed with gas inside the system, the nozzle may turn blue to ensure that a user is aware of the change of contents.

A method for analyzing flow of a multiphase fluid through a flowmeter is provided. In one embodiment, the method includes transmitting two beams of electromagnetic radiation along different paths through a multiphase fluid and detecting the two transmitted beams with detectors. The method also includes determining a gas fraction and a water-in-liquid ratio of the multiphase fluid. The gas fraction is determined based on the detected first beam of electromagnetic radiation and the water-in-liquid ratio of the multiphase fluid is determined based on the detected second beam of electromagnetic radiation. Additional systems, devices, and methods are also disclosed.

An apparatus and associated a method are described for performing gas analysis on a gas sample. The method comprising exciting the gas sample with one or more electromagnetic energy sources and obtaining optical absorption signals associated with the gas sample prior to application of a catalytic process to the gas sample as well as during and/or after application of the catalytic process to the gas sample. The obtained optical absorption signals may then be processed using differential calculation approaches to derive information associated with the gas sample, which may include for example information conveying concentrations of certain specific gases in the gas sample. In some implementations, the optical absorption measurement system is configured to use the one or more electromagnetic energy sources to excite the gas sample to produce first optical absorption signals. The optical absorption measurement system is also configured to apply a catalytic process to the gas sample to derive a modified gas sample and to use the one or more electromagnetic energy sources to excite the modified gas sample to produce second optical absorption signals. Information may then be derived at least in part by processing the first optical absorption signals and second optical absorption signals. The apparatus and associated method may find practical uses in a variety of fields including, without being limited to, the field of dissolved gas analysis (DGA) for detecting/monitoring faults in liquid-insulated electrical equipment as well as equipment used for mine safety, particularly coal mines; equipment for analyzing gases that emerge from the bore hole during drilling for natural gas and oil and equipment for identifying gas leaks in underground natural gas lines as well as other areas.

An apparatus for detecting internal defects in a transformer is provided. The apparatus detecting internal defects that arise in the interior by integrating an electrode for electrically detecting defects and a sensor for detecting internal gas into a single body and inserting same into the interior. The apparatus for detecting internal defects in a transformer according to the present invention comprises: a metal member of a set length; a plurality of electrodes, disposed around the metal member, for detecting electrical signals generated due to internal defects of the transformer; an insulating member formed so as to contain the metal member and plurality of electrodes; and a gas sensor, installed at the end of the metal member, for detecting gas inside the transformer.

An apparatus to detect contaminants in a fuel comprises an input to receive a fuel flow. A light scattering system is coupled to the input. An imaging system is coupled to the light scattering system. A memory is coupled to the imaging system. A processor is coupled to the memory. Output signals from the imaging and light scattering systems are transferred to the processor. The processor is configured to cause the light scattering system to monitor the light scattering intensity from the contaminants in the fuel flow. The processor is configured to cause the light scattering system to measure a light scattering intensity signal from the contaminants in the fuel flow. The processor is configured to generate a trigger signal to turn on the imaging system when the light scattering intensity is greater than a predetermined threshold.

A method of analyzing dissolved gas in an oil-filled transformer includes determining a centroid of a polygon that represents a plurality of dissolved gas concentrations. A fault region in which the centroid of the polygon is located is determined, where the plurality of fault regions are defined in a composite fault region map that is a composite of a Duval Pentagons 1 and 2. The method classifies a fault experienced by the transformer based on the determined fault region within the composite fault region map. The classification is done by a machine learning classification technique. Further embodiments classify faults based on dissolved gas levels without determining a centroid of a polygon representing the dissolved gas levels. Related systems are also disclosed.