13 results about "Wax deposition" patented technology

The invention discloses a heating control method for an engine gas delivery pipeline of a marine gas generator set, which relates to the technical field of marine gas power systems, and comprises the following steps: collecting multi-dimensional environment state information of the gas delivery pipeline in real time, analyzing gas components and pressure fluctuation data, and calculating the temperature of the gas delivery pipeline; a theoretical dew point temperature and a potential paraffin precipitation temperature under real-time pressure are calculated by combining a fuel gas physical property database, a real-time heat exchange model is constructed by combining a pipeline outer wall temperature gradient and a cabin environment temperature, theoretical temperature attenuation curves of different positions of fuel gas in a pipeline are obtained, condensation and paraffin precipitation risk positions and degrees are predicted after comparison, and a real-time heat exchange model is established. And differential electric heat tracing control strategies of different sections of the pipeline are generated in combination with relative humidity data of the cabin. The method can adapt to the real-time physical property of gas and the heat exchange state of the pipeline section, and the heating control execution mode of the gas pipeline is optimized.

The embodiment of the application provides a kind of pore wall wax deposition thickness measuring device and method, including first thermostat, hex valve, first high-precision displacement pump, second thermostat, first gas flow meter, third thermostat, second high-precision displacement pump, third high-precision displacement pump, fourth high-precision displacement pump, third pressure sensor, fourth pressure sensor, fourth electric valve, differential pressure sensor, fifth electric valve and control terminal, first thermostat is provided with first high-temperature autoclave and second high-temperature autoclave, second thermostat is provided with core holder, back pressure valve and oil-gas separation mechanism, third thermostat is provided with third high-temperature autoclave.Based on first thermostat, second thermostat and third thermostat etc., the influence of fluid heat transfer and porous medium heat transfer on wall wax deposition can be simulated, and the influence of different temperature and cooling rate on wall wax deposition can be analyzed by adjusting temperature.

The invention relates to the technical field of air ventilation regulation, in particular to an air conditioning, dehumidification energy saving and energy recovery control method which comprises the following steps: S1, calibrating a wax deposition sensitivity coefficient and dividing regulation priority 1-3 days after cherries turn color to a coloring period; s2, determining an evaporation rate and a temperature and humidity fluctuation adaptive interval; s3, soil heat and moisture migration requirements are synchronously matched, and the evaporation rate is maintained in an adaptive interval; s4, turbulent flow buffer regulation and control are started when the standard exceeds the standard; s5, realizing heat flow density homogenization, and simulating and optimizing global heat flow distribution in combination with TRNSYS; s6, detecting the thickness and uniformity of the wax coat in real time; and S7, three days before the end of the coloring period, backtracking and correcting the adaptive interval S2, the airflow parameters S3 and the heat flow distribution scheme S5 to form a closed-loop optimization mechanism. According to the method, accurate matching of parameters such as air conditioning in a wax synthesis key environment is realized through wax deposition sensitivity coefficient calibration, dynamic mapping model construction and partition targeted regulation and control, and the thickness uniformity and integrity of a wax coat are effectively improved.

The present application relates to the technical field of waxy crude oil pipeline transportation and storage, and particularly relates to a method for determining the effective diffusion coefficient of wax molecules, comprising the following steps: S1, establishing a calculation model of the effective diffusion coefficient of wax molecules in wax deposits; S2, obtaining multiple wax crystal microscopic images of the wax deposit sample at different temperatures through a microscopic observation device; S3, performing image preprocessing on each wax crystal microscopic image, and combining the preprocessed wax crystal microscopic images, the calculation model of step S1 is used to calculate the effective diffusion coefficient of wax molecules in the wax deposit sample in each wax crystal microscopic image; S4, fitting the effective diffusion coefficient of wax molecules in the wax deposit sample in each wax crystal microscopic image, and obtaining the change relationship between the ratio of the effective diffusion coefficient of wax molecules in the wax deposit and the diffusion coefficient of wax molecules in the crude oil and the solid-phase wax crystal particle concentration. The method for determining the effective diffusion coefficient of wax molecules can accurately calculate the effective diffusion coefficient of wax molecules.

This utility model provides a device for testing wax deposition in dissolved gas crude oil, comprising: a fixed frame, a deposition component for depositing wax movably mounted on the upper side of the fixed frame, a deposition tank for storing crude oil on the left front side of the fixed frame, and a stripping component for stripping the deposited wax on the right front side of the fixed frame. Compared with the prior art, this utility model has the following advantages: by setting the deposition component and the deposition tank, the deposition cylinder can rotate circumferentially, thereby contacting more dissolved gas crude oil, thus simulating the effect of wax deposition under the movement of dissolved gas crude oil, avoiding the problem of test result distortion caused by static wax deposition, and helping to ensure the authenticity of the test environment. The setting of the stripping component, the fixed frame, and the deposition component reduces the amount of wax residue on the deposition cylinder, ensuring the authenticity and reliability of the test results.

The utility model discloses a wax deposition determination flash filter relates to the petroleum chemical industry detection equipment field, including filter main part, two groups of filter inlet joint, bar hollow support, filter screen and netted support, through the combination design of bar hollow support and filter screen, netted support makes filter screen installation stable, can effectively resist high pressure fluid impact, prevents the collapse, through the pull bar hollow support, takes out the whole filter screen and netted support whole, has realized the quick sampling of deposit and the convenient replacement of filter screen, and filter screen design can replace, makes the device can nimblely adapt to the multiple crude oil system of different wax crystal size, promotes the experimental flexibility and repeatability, provides high reliability data support for wax deposition mechanism research and prevention and control technology development, widens the application range.

This invention relates to the field of oil pumping unit control system technology, and particularly to an intelligent control method and system for a rotary motor commutating oil pumping unit. An intelligent control method for a rotary motor commutating oil pumping unit includes the following steps: S1: During the process of the oil pumping unit collecting high-wax crude oil, downhole environmental data and oil pumping unit operating data are collected in real time; S2: A pressure wax precipitation model is constructed based on the downhole environmental data, and a wax precipitation risk index is calculated based on the pressure wax precipitation model; S3: The pumping unit's resistance strength index is calculated based on the pumping unit operating data and the wax precipitation risk index; S4: The target operating stroke of the pumping unit is optimized based on the resistance strength index; S5: The rotary motor is commutated based on the target operating stroke. This invention can achieve a dynamic balance between fluid supply capacity utilization and wax deposition suppression, and can dynamically adapt to different oil well geological conditions and crude oil wax precipitation characteristics.

The application discloses an oil-in-water emulsion type wax remover and a preparation method and application thereof. The oil-in-water emulsion type wax remover comprises the following components in percentage by mass: 40-50% of an organic solvent; 0.3-0.51% of a surfactant; 5-10% of a mutual solvent; 0.5-1.0% of an alkaline regulator; and the balance of distilled water. The organic solvent comprises kerosene and an aromatic hydrocarbon solvent, and the aromatic hydrocarbon solvent comprises dimethylbenzene and a high-boiling-point aromatic hydrocarbon solvent. The oil-in-water emulsion type wax remover has suitable component formula, good synergy and strong wax removal capacity. The oil-in-water emulsion type wax remover can be used for removing wax deposition in a gas well wellbore and wax deposition in an oil well wellbore, and has the characteristics of fast wax removal rate, safe use, low toxicity and environmental protection.

The invention discloses an oil-based wax deposition inhibitor as well as a preparation method and application thereof. The oil-based wax deposition inhibitor comprises the following raw materials in parts by weight: 1-25 parts of an oil-based heavy component; 2 to 15 parts of an oil-based active component; 100 parts of a dissolving dispersant; wherein the oil-based heavy component is obtained by taking furfural extract oil as a raw material; the oil-based active component is obtained by taking vacuum residue as a raw material. The wax deposition inhibitor can significantly reduce the wax deposition quality, and has the advantages of excellent performance, low cost and small dosage of chemical reagents.

The invention discloses an oil pipeline paraffin remover in the technical field of crude oil production, and relates to an infrared paraffin melting self-powered oil pipeline paraffin remover and an operation method. An infrared wax melting self-powered oil pipeline paraffin remover comprises a ceramic ball, a ceramic electrical bar, a switch, a high-energy battery and the like. The high-energy battery is used for supplying power to the ceramic electrical bar, so that the ceramic electrical bar is heated, the generated heat energy heats the paraffin deposits through the multi-air-gap ceramic ball in a conduction and infrared radiation mode, the paraffin deposits are melted and then discharged out of an oil conveying pipeline along with crude oil, and therefore the purposes of removing paraffin and dredging the pipeline are achieved. The invention essentially belongs to a thermal method, is a pure physical method, does not influence the original physicochemical properties of crude oil, and has the advantages of self-regulation of heat source temperature reduction during smooth oil transportation and heat source temperature rise during blockage, small useless heat loss, high heat energy utilization rate, simplicity and convenience in production, debugging, use and operation and the like; the defects and deficiencies existing in the prior art are overcome.

The invention discloses a crude oil pipeline wax deposition thickness prediction method and system based on Optuna optimized L-LSTM, and the method comprises the steps: obtaining the operation data of a crude oil pipeline, the oil physical property data and the basic parameters of the pipeline, and carrying out the back calculation through a Schhoff temperature drop formula and a Babing friction formula, and obtaining the average wax deposition thickness; constructing a Huangkou kinetic wax deposition kinetic model, calculating to obtain a wax deposition thickness true value, and comparing the average wax deposition thickness with the wax deposition thickness true value to obtain a residual sequence; constructing an LSTM neural network model, optimizing hyper-parameters of the LSTM model through an Optuna framework to obtain an optimal residual error correction model, and obtaining a residual error correction value by using the optimal residual error correction model; and superposing the average wax deposition thickness and the residual error correction value to obtain a final prediction value of the wax deposition thickness of the crude oil pipeline. The method solves the problems of low wax deposition thickness prediction precision and insufficient generalization ability, and realizes final prediction of the wax deposition thickness of the crude oil pipeline.

This invention provides an evaluation method for ensuring the flow of crude oil in a pipeline, relating to the technical field of oil extraction. The method includes: obtaining pipeline design parameters, basic crude oil physical properties, environmental parameters of the pipeline location, and equipment design parameters; constructing a mathematical model of pipeline temperature during shutdown and a soil heat transfer model; obtaining heat loss and soil heat transfer loss during shutdown based on the pipeline design parameters, basic crude oil physical properties, environmental parameters of the pipeline location, equipment design parameters, the mathematical model of pipeline temperature during shutdown, and the soil heat transfer model; obtaining the pipeline end temperature based on the heat loss and soil heat transfer loss during shutdown; obtaining a first threshold and determining whether the first threshold is lower than the pipeline end temperature. This invention provides an effective and accurate evaluation method for assessing the flowability of crude oil in pipelines, preventing wax deposition, and determining a reasonable crude oil outlet temperature.

This invention relates to the field of oilfield production technology, and in particular to a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells. It mainly addresses the problems of large errors in measuring wax deposition and inaccurate detection of the wax-preventing effect of existing wax deposition simulation devices. A back pressure valve (21) is installed at the inlet of the raw oil tank (1). The outlet of the raw oil tank (1) is connected to a power pump (5) via a pipeline (14). A wax deposition simulation cylinder (7) is connected to the pipeline (14) at the outlet of the power pump (5). The outlet of the wax deposition simulation cylinder (7) is connected to a valve group (12) via a pipeline (14), and a temperature sensor (11) is connected to the pipeline (14) at the outlet of the wax deposition simulation cylinder (7). The outlet of the valve group (12) is connected to the back pressure valve (21) via a pipeline (14). This device can simulate wax deposition in oil wells and detect wax removal and prevention tools and technologies, which is of great significance for energy saving and consumption reduction in mechanized wells and for defining the application scope of wax prevention tools and technologies.