66 results about "Wax precipitation" patented technology

The invention discloses an oil pipeline simulation analysis system, relates to the technical field of oil pipelines, and provides accurate data support for subsequent dynamic monitoring and pipeline cleaning decision by constructing a three-dimensional visual model and identifying wax precipitation temperature and deposition risk in time. Through the risk identification module, the system can analyze and calculate the wax precipitation temperature based on the oil product attribute data obtained in real time, and timely judge whether the deposition risk exists in the oil pipeline or not. After receiving a dynamic tracking instruction, the dynamic analysis module can obtain the deposition thickness of each position in a pipeline in real time and analyze the influence of oil temperature and flow velocity changes on deposition distribution, the analysis provides important input data for the pipe cleaning module, the deposition thickness and a heat loss coefficient are fitted through a deep learning technology, and the deposition thickness and the heat loss coefficient are matched with each other. The system may automatically calculate a delivery stability score. When the conveying stability score exceeds a set threshold value, the system can automatically start a pigging measure execution mechanism.

The invention provides a shaft paraffin removal period prediction method, and belongs to the field of petroleum and natural gas industry. The method comprises the following steps: firstly, collecting wax deposition experimental data of the carbon dioxide flooding production well under a simulated working condition and calculating a wax deposition rate experimental value; secondly, preprocessing the sample data; constructing an initial random forest regression model, and optimizing hyper-parameters in the model by using a Bayesian algorithm; training the optimized random forest model by using the processed sample data of the carbon dioxide flooding production well under the simulated working condition; then wax precipitation real-time data of the working condition of the carbon dioxide flooding production well is obtained; inputting real-time wax deposition data into the trained random forest model, and predicting a real-time wax deposition rate; and finally predicting the paraffin removal period according to the paraffin deposition rate. By adopting the method, the prediction precision of the wax deposition rate can be improved, and accurate guidance is provided for determining the paraffin removal period of the shaft.

The invention discloses a transformer oil tank, and relates to the technical field of power transformers, the transformer oil tank comprises an oil tank body and a plurality of groups of fin mechanisms, and each group of fin mechanism comprises radiating fins with cavities formed inside. The cooling fins with the cavities are arranged on the outer side of the oil tank body, the slidable adjusting plate and the driving assembly are matched, the effective oil storage volume of the cooling fins can be flexibly adjusted according to the environment temperature, the maximum cooling area is guaranteed in the non-low-temperature environment so that efficient cooling can be achieved, the cooling contact area is reduced in the low-temperature environment, and the service life of the oil tank is prolonged. Wax precipitation and viscosity increase caused by excessive cooling of the cooling oil are avoided, so that the insulating property and the circulating fluidity of the cooling oil are maintained, the circulating stirring mechanism can promote efficient circulation of the cooling oil between the oil tank and the fins under driving of the driving mechanism, and the heat dissipation efficiency is further improved; the problems of heat dissipation and insulation performance of the oil-immersed transformer in a low-temperature environment are effectively solved, and the operation reliability and environmental adaptability of equipment are improved.

The utility model relates to the field of oil exploitation, in particular to a heating type wellhead for oil exploitation, which comprises a conveying pipeline and a plurality of oil way control valve assemblies connected to the top of the conveying pipeline, and an adjustable electromagnetic heating sleeve mechanism is mounted on the surface of the conveying pipeline. The top and the bottom of the adjustable electromagnetic heating sleeve mechanism are connected with fixing mechanisms correspondingly, the fixing mechanisms are installed on the surface of the conveying pipeline, the adjustable electromagnetic heating sleeve mechanism comprises a heat preservation installation sleeve and an electric heating coil connected to the inner side of the heat preservation installation sleeve, and a temperature sensor is installed on the heat preservation installation sleeve. And one end of the temperature sensor extends into the heat preservation mounting sleeve. When the electric heating coil is used, the temperature of crude oil in the conveying pipeline is rapidly increased, the flowing efficiency of the crude oil is improved, wax precipitation is prevented, and when the position of the heat preservation installation sleeve is adjusted, the universal ball rolls on the surface of the conveying pipeline, so that the heating position is changed, and the heating position of a pipe opening can be adjusted; and the crude oil extraction and transportation efficiency can be improved.

The invention discloses an experimental device and method for researching a wax precipitation rule in a porous medium in a near wellbore area, and belongs to the technical field of wax precipitation experiments.The experimental device comprises a wax deposition visualization model, a multi-stage temperature control module, a liquid injection and cleaning module, a confining pressure adjusting module, a back pressure control module, a product recovery module and an image acquisition module; a natural rock core slice with a pore throat structure is simulated through a wax deposition visual model, a multi-stage temperature control module is utilized to perform graded local heating to simulate complex temperature conditions of a stratum, confining pressure is provided through a confining pressure adjusting module, and model outlet pressure is adjusted through a back pressure control module to simulate flowing bottomhole pressure. Crude oil and cleaning fluid are injected into the liquid injection and cleaning module, and an oil displacement experiment and cleaning after the oil displacement experiment is completed. The image acquisition module and the visual clamping module are used for visually observing the wax precipitation process in the model, the wax crystal phase change process in the experiment process is analyzed, and the wax step-by-step precipitation law is represented through wax precipitation formulas of different parts of the model.

The embodiment of the invention provides a wax precipitation point testing device and method.The wax precipitation point testing device comprises a nuclear magnetic resonance spectrometer, a constant temperature box, a first high-precision displacement pump, a second high-precision displacement pump, a third high-precision displacement pump, a back-pressure valve, a fourth high-precision displacement pump and a vacuum pump; the thermotank comprises a high-temperature high-pressure kettle, a first intermediate container and a second intermediate container, and the first intermediate container and the second intermediate container are internally provided with non-magnetic fluid. Based on the principle that the magnetization intensity of hydrogen atoms in crude oil has decreasing rate difference before and after the wax precipitation point, the wax precipitation point under different pressures is accurately obtained by adopting a nuclear magnetic resonance technology, so that the conventional wax precipitation point testing technology under high-temperature and high-pressure conditions is supplemented; and adverse effects caused by paraffin precipitation in oil and gas production operation are reduced, and efficient development of high-wax-content oil reservoirs is assisted.

The invention relates to a micro-fluidic chip pour point depressant intelligent screening and optimizing device and method integrating multi-parameter detection, and the micro-fluidic chip pour point depressant intelligent screening and optimizing device integrating multi-parameter detection comprises an experiment module, a data acquisition module and a data analysis and control module, the experimental module comprises a power area, a conveying area, a temperature control area, an imaging area and a recovery area, the imaging area comprises a polarizing microscope and a micro-fluidic chip, the micro-fluidic chip comprises a sample introduction channel, a storage chamber, a micro-mixing chamber, a wax precipitation chamber and a temperature control system, and the micro-mixing chamber realizes efficient mixing of a pour point depressant and crude oil; the wax precipitation chamber simulates the complex flow state environment of a real oil pipeline, a wax crystal morphology observation area, a wax crystal motion behavior observation area and a wax crystal dynamic behavior observation area are arranged, the wax crystal flow state is observed, and wax crystal dynamic parameters are collected; through dynamic time sequence modeling of LSTM and strategy gradient optimization of PPO, efficient dynamic adjustment of a pour point depressant formula is realized.

The invention relates to the technical field of oil and gas transportation, and discloses a wax-bearing shale oil and gas double-pipe gathering and transportation system and process. According to the system, a double-oil-outlet gathering pipeline is adopted from a well site / platform to a centralized processing station to adapt to full-life-cycle production, high-pressure and low-pressure oil and gas conveying paths are not distinguished in the initial stage of wax-bearing shale oil production, and parallel production of a first oil and gas conveying path and a second oil and gas conveying path adapts to the maximum productivity scale to reach a flat peak; in the wax-bearing shale oil stable production period, oil and gas produced by a high-pressure single well and a low-pressure single well are conveyed in a separated mode, the oil and gas conveying efficiency from a well site / platform to a centralized processing station is improved, a middle two-way communication path is arranged, high-pressure oil and gas are guided into a low-pressure oil and gas conveying path, and the situation that the low-pressure oil and gas conveying path is too low in flow speed and prone to wax precipitation is avoided. The good low-temperature flowing property of the wax-containing shale oil is fully utilized, the purposes of improving the gathering and transportation pipeline efficiency and saving energy consumption are achieved, and energy consumption reduction and cost reduction of the whole life cycle of the wax-containing shale oil gathering and transportation system are achieved.

The invention provides a shale oil well wax precipitation inhibitor based on fracturing fluid flowback as well as a preparation method and a use method thereof, and belongs to the technical field of wax precipitation prevention and control. The wax crystal inhibitor is used for inhibiting the precipitation of waxy substances in crude oil and reducing the formation of wax crystals; the dispersing agent is used for dispersing the wax crystals in the fluid so as to prevent the wax crystals from agglomerating into blocks and depositing; the rheological modifier is used for optimizing the rheological property of the fracturing fluid and enhancing the dispersity of the wax precipitation inhibitor in the fracturing fluid; the temperature regulator is used for regulating the activity of the paraffin precipitation inhibitor according to the change of the oil well temperature; and the solvent is used for ensuring the uniform dispersion of the raw material components. The paraffin inhibitor can effectively solve the problem of paraffin precipitation in the shale oil well fracturing fluid flowback process in the prior art, and has wide adaptability and excellent paraffin inhibition effect.

The oil supply system comprises a main oil tank, an auxiliary oil tank and a heating module, a first kind of fuel oil is contained in the main oil tank, a second kind of fuel oil is contained in the auxiliary oil tank, and the heating end of the heating module is arranged in the main oil tank. The heating module heats the first type of fuel oil in the main oil tank, and the engine can work according to the second type of fuel oil or the heated first type of fuel oil. According to the oil supply system, the engine of the excavator can be firstly started through the second type of fuel oil in the auxiliary oil tank, and then the first type of fuel oil with lower cost in the main oil tank is heated through the heating module, so that the problem of wax precipitation of the first type of fuel oil in a subzero low-temperature environment is avoided; and then the first type of fuel oil is switched to serve as an oil supply source of the engine, so that the working cost of the excavator in the subzero low-temperature environment is reduced, and the working performance of the engine in the subzero low-temperature environment is improved.

The invention relates to the technical field of oil exploitation, in particular to an oil well automatic regulation and control dosing method and system, and the method comprises the steps: arranging a plurality of temperature sensors on an oil pipeline in an oil well, and collecting data points; clustering all the data points to obtain category labels of all the data points, communicating according to a spatial sequence based on an obtained category label sequence, and outputting M spatially continuous dosing segments; and acquiring wax precipitation characteristic parameters of the first dosing section, inputting the acquired wax precipitation characteristic parameters into a pre-constructed wax inhibitor concentration demand prediction model, and outputting the wax inhibitor concentration demand of the first dosing section. According to the invention, the addition amount of the wax inhibitor is accurately controlled according to the actual flowing state and temperature distribution of the oil body, so that the agent is fully mixed in the pipeline and reaches the target concentration, insufficient or waste of local agent addition is avoided, and the wax inhibition effect and the drug use economy are obviously improved.

The application embodiment provides a wax precipitation point testing device and method, which comprises a nuclear magnetic resonance instrument, an incubator, a first high-precision displacement pump, a second high-precision displacement pump, a third high-precision displacement pump, a back pressure valve, a fourth high-precision displacement pump and a vacuum pump, the nuclear magnetic resonance instrument is internally provided with a core holder, the incubator comprises a high-temperature high-pressure kettle, a first intermediate container and a second intermediate container, and the first intermediate container and the second intermediate container are internally provided with non-magnetic fluids. Based on the principle that the hydrogen atom magnetization intensity in crude oil has a difference in the decrement rate before and after the wax precipitation point, the nuclear magnetic resonance technology is used to accurately obtain the wax precipitation point under different pressures, the existing wax precipitation point testing technology under high-temperature high-pressure conditions is supplemented, the adverse effects caused by the wax precipitation in oil and gas production operation are reduced, and the efficient development of high-wax-content reservoirs is facilitated.

The invention relates to the technical field of fluid phase analysis, and provides a method and device for determining the wax precipitation amount in the oil and gas conveying process, and the method comprises the steps: carrying out a single-phase stability test on a conveyed fluid to generate a single-phase stability test result; if the system corresponding to the wax-containing one-phase stability test result is unstable, performing wax-containing two-phase flash evaporation calculation on the wax-containing one-phase stability test result to determine a first wax precipitation amount; if the system corresponding to the single-phase stability test result is unstable, performing gas-liquid two-phase flash evaporation calculation on the single-phase stability test result, and performing wax-containing two-phase stability test on the gas-liquid two-phase flash evaporation calculation result; and if the system corresponding to the wax-containing two-phase stability test result is unstable, performing gas-liquid wax three-phase flash evaporation calculation on the wax-containing two-phase stability test result to determine a second wax precipitation amount. According to the method, the change condition of the wax precipitation content along with the temperature in the oil and gas transmission process, especially under the under-pressure working condition, can be accurately predicted, and the calculation robustness is improved.

The utility model discloses a methanol synthesis system capable of reducing paraffin precipitation, which comprises a fresh gas-oil separator, an exhaust port of the fresh gas-oil separator is connected with a gas inlet of a fine desulfurization tower, an exhaust port of the fine desulfurization tower is connected with an inlet of a tower-front preheating gas inlet pipe, an outlet of the tower-front preheating gas inlet pipe is connected with a cold source inlet of a tower-front preheater, and a cold source outlet of the tower-front preheater is connected with a cold source outlet of the fine desulfurization tower. A cold source outlet of the pre-tower preheater is connected with an inlet of the methanol synthesis tower, an outlet of the methanol synthesis tower is connected with a heat source inlet of the pre-tower preheater, and a heat source outlet of the pre-tower preheater is connected with an inlet of the methanol separation section. The heat of the deoxidation reactor and the methanol synthesis tower is utilized, and fresh gas fed into the deoxidation reactor and synthesis gas fed into the methanol synthesis tower are preheated through the front preheater and the deoxidation preheater respectively, so that the temperature of the whole methanol synthesis system is increased, and the wax precipitation condition in winter is reduced; the problems of reduction of heat transfer efficiency, increase of fluid resistance and the like caused by wax precipitation are effectively avoided, and continuous operation of a production system can be guaranteed.

The invention relates to a rodless pump well fiber paraffin control and removal device which comprises an outer pipe oil pipe, and the inner side wall of the outer pipe oil pipe is evenly connected with a plurality of active paraffin precipitation device fibers and paraffin catcher ropes. A lifting cable is fixedly connected to the middle of the upper end of the paraffin removal connecting device, and the paraffin removal connecting device is movably inserted into the outer oil pipe. According to the equipment provided by the embodiment of the invention, the wax catcher cotton rope and the active wax precipitation device fiber, namely a fibrous or woolen yarn-like structure, are mounted on the inner wall of the oil pipe, namely a wax crystal or wax molecule adsorption fiber material or adsorption cotton rope, and are lowered into a well along with the oil pipe and below a wax precipitation point during oil well operation, so that when the oil well is in production, if the oil contains wax, the wax crystal or wax molecule adsorption fiber material or adsorption cotton rope is not damaged; and the wax can be easily captured and gathered by the rope of the wax catcher and the fiber of the active wax precipitation device, equivalently, the wax is removed from the oil, so that the wax is more conveniently and quickly captured and removed from the oil liquid.

The utility model relates to the technical field of liquid conveying, and discloses an environment-friendly rubber tube heating device which comprises a temperature controller and a sleeving hose arranged on the outer side of a rubber tube, a heating cable is embedded in the inner wall of the sleeving hose, the heating cable is attached to the outer wall of the rubber tube, and the heating cable is electrically connected with an external power source through the temperature controller. A heat preservation layer is arranged on the outer side of the sleeving hose. When the weather is cold, the outer side of the rubber pipe is sleeved with the sleeving hose, the heating cable in the sleeving hose is attached to the outer wall of the rubber pipe, the rubber pipe is heated by being powered on under the control of the temperature controller, meanwhile, heat leakage can be reduced through the arrangement of the heat preservation layer, and the energy-saving and environment-friendly effects are achieved; according to the device, the phenomena of poor fluidity and even icing and wax precipitation caused by too low temperature of oil in the rubber pipe can be prevented, the influence on the oil filling speed is avoided, meanwhile, the device is buckled to the outside from the side wall of the rubber pipe due to the arrangement of the sleeving hose notch and the buckling piece, and disassembly and assembly are more convenient.

The invention discloses a device and a method for simulating a wax deposition test in a flowing process of crude oil with different components. The device comprises a gas supply tank, a mixing tank, a centrifugal pump I, a wax deposition test system and a dosing and mixing tank, an outlet of the gas supply tank is connected with a mixing tank, an outlet of the mixing tank is connected with a centrifugal pump I, the centrifugal pump I is connected with a test sample inlet of a wax deposition test system through a test sample input pipeline, a test sample outlet of the wax deposition test system is connected with an inlet of a dosing mixing tank, and an outlet of the dosing mixing tank is connected with a recovery pipeline; a recovery tank is connected to the recovery pipeline, and the recovery pipeline is communicated with the test sample input pipeline. Different from the situation that the wax precipitation rule test result cannot be reproduced due to the fact that wax sample components in crude oil are reduced along with the prolonging of test time in the conventional large-size wax precipitation simulation test, the test method has very small influence on the wax components in the oil sample, and can be used for testing multiple parameters by using the same oil sample, so that the consistency of the test sample composition is ensured, and the test efficiency is improved. And the test result reproducibility is good.

The invention discloses an oil increasing device for an oil field, and relates to the technical field of oil exploitation. The oil field oil increasing device comprises a shell, an oil inlet is formed in the bottom of the shell, permanent magnet moving equipment is movably connected to the top of the oil inlet, and an oil outlet pipe is fixedly connected to the interior of the shell; a first pushing block is slidably connected to the upper portion of an internal permanent magnet of the permanent magnet moving equipment, a first hydraulic ring is slidably connected to the upper portion of the first pushing block, the side face of the first hydraulic ring is fixedly connected with one end of a first hose, the other end of the first hose is fixedly connected with a first hydraulic block, and a second pushing block is slidably connected to the top of the first hydraulic block. The top of the second push block is fixedly connected with a valve, the bottom of the valve is fixedly connected with a dosing box, and the spherical nozzle is movably connected with the first hydraulic ring through a transmission piece. According to the oil increasing device for the oil field, permanent magnet moving equipment moves up and down and is matched with a first push block, a first hydraulic ring, a first hose, a transmission piece, a valve and a spherical spray head, so that an active agent is uniformly sprayed, and the wax precipitation phenomenon is relieved.

The present application belongs to the technical field of oil production matching technology, and discloses a high-coagulation heavy oil reservoir cold damage evaluation method, which utilizes physical simulation and numerical simulation methods to analyze the reservoir cold damage degree, reversibility, the minimum temperature for avoiding cold damage and the reservoir temperature recovery time from quantitative and qualitative aspects, wherein the physical simulation firstly determines the crude oil properties through the crude oil viscosity-temperature and wax precipitation experiments, then utilizes the core to carry out breakthrough pressure experiments to determine the occurrence temperature of the reservoir cold damage, startup pressure experiments to determine the minimum temperature for avoiding damage, relative permeability experiments to determine the influence degree of the cold damage on the reservoir percolation capacity, mercury injection experiments to analyze the influence of the cold damage on the reservoir pore structure, and two-dimensional nuclear magnetic experiments and laser confocal experiments to determine whether the cold damage is reversible and the reversible temperature; the numerical simulation is utilized to analyze the recovery time required for different liquid amounts and different temperature working liquids to enter the formation, so as to finally achieve the purposes of reducing the development cost of the high-coagulation oil reservoir and improving the development effect.

The invention discloses a CO2 drive reservoir producing well shaft phase change point calculation method. The method comprises the following steps that S1, a bubble point temperature-pressure relation curve and a wax precipitation temperature-pressure relation curve of a target well are calculated; s2, calculating a temperature-well depth relation curve and a pressure-well depth relation curve of the target well under different working conditions; s3, calculating a bubble point temperature-well depth relation curve and a wax precipitation temperature-well depth relation curve under different working conditions; s4, calculating gas-liquid phase change point depths and wax precipitation phase change point depths under different working conditions; s5, obtaining a calculation formula and a calculation formula through multiple linear regression; s6, the actually-measured production conditions of the target well are substituted into the calculation formula, and the phase change point of the target well under the production conditions can be calculated. According to the method, rapid and accurate prediction of the phase change point of the shaft of the CO2 flooding producing well is realized.

The invention relates to the technical field of oil and gas field development, and discloses a method, a system, equipment and a medium for evaluating the influence of wellbore dirt on organic solid phase deposition. The method comprises the steps of determining temperature fields corresponding to different wellbore positions of a single well, correspondingly setting a first temperature according to the temperature fields where the different wellbore positions are located, cooling at a set speed according to the first temperature, recording the change condition of differential heat flow to the temperature in real time, and drawing differential scanning calorimetry curves under the different wellbore positions when a second temperature is reached, determining a wax precipitation point and an interpolation base line of a wellbore temperature interval based on differential scanning calorimetry curves at different wellbore positions, further determining the wax content in the process from the well bottom to the wellbore, further obtaining the organic solid phase deposition in the crude oil at different wellbore positions, and calculating the organic solid phase deposition in the crude oil based on the organic solid phase deposition in the crude oil at different wellbore positions. And evaluating the influence of wellbore dirt on organic solid-phase deposition in crude oil. The method truly and accurately simulates the influence of different shaft positions on organic solid phase deposition.

The application provides a pipeline wax deposition effect testing system and method, the testing system comprising: a wax precipitation device, a sonar detection device and a processing device; the wax precipitation control device is used for controlling the wax precipitation process in the pipeline, the wax precipitation process is the process that the wax is precipitated and deposited in the pipeline; the sonar detection device is used for emitting a first sound wave into the pipeline after the end of the wax precipitation process, and recovering a second sound wave corresponding to the first sound wave, and sending the data of the first sound wave and the second sound wave to the processing device; the processing device is used for determining the form of the wax deposition in the pipeline according to the data of the first sound wave and the second sound wave. The application can effectively obtain the characteristics of the wax deposition.

The invention relates to the technical field of oilfield chemistry, in particular to a wax crystal inhibitor for oil and gas production and a preparation method thereof, and the wax crystal inhibitor for oil and gas production comprises the following raw materials in parts by mass: 60-65 parts of an oily solvent, 10-15 parts of a wax crystal modifier, 5-10 parts of a penetrant and 10-15 parts of a surfactant. Through interaction of the components in the raw materials, the wax crystal inhibitor for oil and gas production enters a wax crystal molecular structure before oil well wax precipitation, wax crystal scaling is destroyed, wax aggregation, growth and precipitation are prevented, the problem that oil well production and conveying are difficult due to wax precipitation of a high-wax-content oil well is effectively solved, wax crystal aggregation and adsorption are prevented, and the oil production efficiency is improved. And the wax is extracted along with the liquid flow. Meanwhile, the demulsifying agent has good compatibility with a field demulsifying agent and does not influence crude oil dehydration.

The invention discloses an intelligent monitoring, predicting and cleaning integrated robot for well wall wax precipitation. Relates to the technical field of oil exploitation equipment. A non-contact laser distance measuring sensor is arranged in a detector fixing box; the rotating mechanism comprises a rotating rod, a rotating base and a rotating motor, the detector fixing box is connected with the rotating rod, and the output end of the rotating motor is meshed with a transmission gear on the rotating rod through a transmission gear; the middle walking mechanism comprises a main support, a spring compression assembly and a walking wheel installation sheet. The tail cleaning mechanism comprises a mounting base and a scraper, and the mounting base is connected with the end, away from the detector fixing box, of the rotating rod. The intelligent monitoring, predicting and cleaning integrated robot for well wall wax precipitation has good self-adaptive capacity and structural stability, is suitable for continuous operation under various complex pipe diameter conditions caused by wax precipitation in the oil and gas well production process, achieves intelligent real-time monitoring, scientific prediction and autonomous cleaning, and is high in practicability and high in practicability. And the oil field maintenance efficiency and economic benefits are obviously improved.

The present application relates to a kind of methods for extracting oil and rubber oil dewaxing, it is characterized in that using the composite solvent of polar solvent and solubilizer is dewaxing solvent, polar solvent uses N-methyl pyrrolidone, solubilizer is the mixture of one, two or three of benzene, toluene, xylene, above wax precipitation temperature, the composite solvent is mixed with extracting oil or rubber oil, then crystallization is cooled, filtration is obtained wax cream and filtrate, wax cream and filtrate are respectively heated and evaporated to recover solvent and obtain wax and dewaxed oil.

The invention belongs to the field of pipeline cleaning, and particularly relates to an oil field pipeline cleaning mechanism which comprises transition pipes communicating with the two ends of a pipeline needing to be cleaned and an impurity removing device used for cleaning the pipeline. The two transition pipes are located on the inner sides of the pipeline switch valves respectively, the transition pipes are Y-shaped bypass short sections welded to the pipelines, and cleaning channels are formed between the bypass short sections of the two transition pipes and the pipelines communicated with the bypass short sections. The guide rope is reserved in the pipeline, when the interior of the pipeline needs to be cleaned, only the first flange of the transition pipe bypass short section needs to be opened, the fixing device for limiting the guide rope needs to be removed, then the connector at one end of the guide rope is connected with one winch through the scraper, and the connector at the other end of the guide rope is directly connected with a lead of the other winch. And then the winches are started, the two winches work alternately, so that the purpose that the scrapers efficiently clean impurities in the pipeline is achieved, the problems of internal scaling and pipe blockage caused by wax precipitation are solved, the structure is simple, cost is low, and environmental protection is achieved.

The utility model discloses a rodless oil extraction heating system, relates to the technical field of rodless oil extraction, and mainly aims to provide the rodless oil extraction heating system which works without stopping production and can prevent wax precipitation on the inner wall of an oil pipe. According to the main technical scheme, the rodless oil extraction heating system comprises a heating component and a heating component, the upper end part is detachably connected to the lower end part, the lower portion of the lower end part is connected to a Christmas tree, the lower end part is provided with a first channel, the clamping part is arranged between the upper end part and the lower end part, the upper end part is provided with a second channel, and the sealing part is arranged on the upper portion of the second channel. The heating part sequentially penetrates through the sealing piece, the second channel, the clamping part, the first channel and the Christmas tree and extends into the oil pipe; the control component and the main control component are connected to the modulation component, the power supply component and the isolation transformer are connected to the modulation component, and the isolation transformer is connected to the heating component. The rodless oil extraction device is mainly used for rodless oil extraction.

The utility model discloses an intelligent diesel oil management system capable of preventing diesel oil from wax precipitation, which relates to the technical field of diesel oil vehicles and comprises an engine body, a fine filter, a rough filter, a heating oil tank and a heating oil pipe, and diesel oil in the heating oil tank passes through the heating oil pipe, is sequentially filtered by the rough filter and the fine filter and then is fed into the engine body. The diesel oil heating device further comprises an oil return mechanism, an oil outlet of an oil return pipeline is connected to the heating oil tank, the fine filter and the coarse filter are respectively provided with an oil return opening, oil pumping assemblies are installed on the oil return openings, and the two sets of oil pumping assemblies are used for pumping diesel oil in the fine filter and the coarse filter back to the heating oil tank. The diesel oil in the filter element can be pumped back into the heating oil tank through the arranged oil return mechanism, so that the phenomenon that the filter element is blocked due to wax precipitation of the diesel oil in the filter element is avoided.

The invention discloses an oil pipe wax removal device which comprises adsorption pipes and connecting rods, the adsorption pipes with the proper number can be selected according to the length of a to-be-dewaxed area in an oil extraction pipe, the multiple sets of adsorption pipes are connected through the connecting rods to form an adsorption chain, the adsorption chain is placed in the to-be-dewaxed area in the oil extraction pipe, and wax crystals in oil are attached to the adsorption pipes. And the adsorption surface of the adsorption pipe is provided with the bulges and the recesses, so that the adsorption capacity of the adsorption pipe is enhanced, and the adsorption chain has a better paraffin removal effect. The paraffin removal operation can be synchronously carried out along with the oil extraction operation, when the oil extraction equipment is maintained, the adsorption chain can be taken out, the replaced paraffin-deposited adsorption chain can be cleaned outside a well, and the oil extraction operation is not affected. Wax precipitation cleaning operation can be synchronously carried out outside a well, so that time loss caused by pause of oil extraction operation during wax precipitation cleaning is reduced; meanwhile, damage to the inner wall of the oil pipe caused by physical paraffin scraping is avoided. The invention further provides an oil pipe wax removal method.

The invention belongs to the technical field of oil exploitation, and discloses a condensate gas well wax precipitation prediction method and application thereof.The method comprises the steps that a dynamic shaft gas-liquid wax precipitation prediction model is established through a basic diffusion deposition equation by considering the influence of an oil wax structure and gas high shear force, and the total model is shown in the formula (6); and the # imgabs0 # brings basic data of an oil and gas well into the model, calculation is carried out, and a wax precipitation chart is established. According to the invention, the paraffin precipitation position and the paraffin precipitation speed of the oil well can be predicted more accurately. According to the method, a gas-liquid two-phase wax deposition dynamic model is established by considering wax deposition mechanism influences such as flow patterns, gas high shear force and oil wax structures. The model is applied to establish a paraffin precipitation prediction chart of a certain condensate gas field, and has guiding significance on field paraffin precipitation problem treatment.