193 results about "Wax precipitation" patented technology

The invention discloses an exploitation method for a wax precipitation oil reservoir. The method comprises the step of adding a chemical agent and thermal fluid into an oil layer to make crude oil in the oil layer smoothly seep into an oil well and then rise to the ground surface. The method has the advantages of effectively solving the problem of wax precipitation of the crude oil in the oil layer and exploiting the wax precipitation oil reservoir, greatly reducing the exploitation cost of the wax precipitation oil reservoir, prolonging the production period and increasing the yield of the oil well and enhancing the final recovery efficiency of the oil reservoir, along with easy implementation, safety and reliability and obvious economic benefit.

The invention relates to a microemulsion heavy wax crystal emulsifying dispersant applied to an oil well for tertiary oil recovery, and is mainly used for solving the problem that the oil production rate is influenced due to the high return pressure and the short thermal washing period of the oil recovery well caused by that serious wax precipitations are generated by the oil well which contains thickened oil and is high in polymer flooding and viscosity. The emulsifying dispersant is prepared from the following components by weight percent: 1% to 3% of high-molecular polymer wax inhibitor, 13% to 25% of organic aromatic solvent, 1% to 3.5% of emulsifying agent, 8% to 12% of sulfonate, 10% to 12.5% of alcohol, 10% to 20% of demulsifier and 25% to 35% of water. The emulsifying dispersant has the dual effects of eliminating and preventing the waxy bitumen colloid precipitations with long molecular chains or high carbon number in crude oil from being precipitated, so that the wall sticking quantity of condensate oil is greatly decreased; the running load of the oil well is reduced; and the well washing period is prolonged. Thus, the oil production rate is improved.

A soluble antiscale wax control ball is disclosed. The soluble antiscale wax control ball comprises surfactants, wax cleaning agents and an antiscale agent RX-613. The surfactants comprise sodium alkylbenzenethiosulphonate, Ninol and polyoxyethylene alkyl ether. The wax cleaning agents comprise ethylene-vinyl acetate copolymer and polyethylene. The soluble antiscale wax control ball is advantaged by being soluble and having functions of preventing scaling and wax precipitation of pipelines, being capable of not blocking pipelines, and the like. The soluble antiscale wax control ball can dissolve old scale into crude oil and can prevent crude oil components from scaling onto walls of pipelines, and therefore problems of mechanical wax-cleaning antiscale balls at present, such as pipeline blockage and high running costs, which are caused by pipeline transfiguration, and the like are overcome. Experiment research shows that the soluble antiscale wax control ball can achieve wax-cleaning effects of rubber balls in site and has multiple functions comprising chemical wax cleaning and scale prevention, the comprehensive wax cleaning rate is 85.2%, and the antiscale rate is 82.18%.

Disclosed is a FT-IR spectroscopy method for the determination of the wax precipitation temperature, and the estimation of the amount of precipitated solid wax material (both crystalline and amorphous) present in a liquid hydrocarbon, such as a petroleum crude oil.

The present invention provides an experimental apparatus and a method for petroleum pipe scaling and wax precipitation, the apparatus comprises a liquid storage tank, a variable frequency motor, a screw pump, a constant temperature water bath tank, a first test tube, a second test tube, a cover plate and a lacing film test sample. The liquid storage tank is used for containing oil water needed for the experiment, and is connected with a temperature control system and a heater to ensure oil water temperature is constant at a preset value; a predetermined flow rate of oil output can be achieved by the variable frequency motor and the screw pump, the constant temperature water bath tank is used for simulation of test tube section wall temperature to study changing laws and mechanisms of sediment characteristics along with pipe wall temperature differences; the first test tube is a full size pipe segment, and is used for fully simulating pipe scaling and wax precipitation, and the second test tube is a pipe segment with an opening, and is used for study on the laws and mechanisms of the sediment characteristics along with time. The experimental apparatus and method can provide new methods and supports for research and development and evaluation of measures scaling and wax removal and prevention, and can ensure the petroleum pipe safe, economic and efficient operation.

The invention relates to a refrigerator oil composition. According to the invention, deep hydrorefined cycloalkane-based base oil and/or paraffin-based mineral oil is adopted as a base oil; a sulfur type, a phosphorus type or a sulfur-phosphorous type anti-scuff agent which takes 1.0-2.5% of every gram of the base oil by weight, and a silicon type, a non-silicon type or a composite type anti-foaming agent which takes 5-25mug of every gram of the base oil by weight are added to the base oil. The refrigerator oil composition provided by the invention has a good pour point depression and dewaxing effect, an excellent fluidity, and a low wax precipitation tendency. A pour point of the base oil with a kinematical viscosity of 35-45mm<2>/s under a temperature of 40 DEG C can be lower than -45 DEG C, and a floc point can be reduced to a value below -42 DEG C. Therefore, heat transferring efficiency reduction caused by refrigerator oil retention at low-temperature positions such as a compressor expansion valve or an evaporator can be prevented. The refrigerator oil composition has sulfur and nitrogen content below 10ppm, a %CA value close to 0, arene content below 1%, and excellent heat/chemical stability and corrosion resistance. With the refrigerator oil composition, a high-power air-conditioner compressor with R22 (monochlorodifluoromethane) as a refrigeration agent can stably operate for a long time.

The invention discloses an oil layer wax precipitation type oil resource exploitation method which is progressed cyclically by the following steps: 1. 0.1-500 tons of pour point and viscosity depressant are injected into oil layers through an oil well; 2. 1-10000 tons of thermal fluids mixed with 30-400 DEG C of pour point and viscosity depressant are injected into the oil layers through an oil well; in the thermal fluids mixed with pour point and viscosity depressant, the weight proportion of the thermal fluids and the pour point and viscosity depressant is 100:0.001-10; 3. the oil well is closed, reacting for 2-240 hours when the well is closed; 4. a mixture of oil and water is sprayed through the oil well; 5. the oil is produced normally by a pumping unit. The exploitation method can effectively exploit the oil layer wax precipitation type oil resource, which greatly reduces the production cost, prolongs the production cycle of the oil well, improves the oil well production and increases the final recovery rate of the oil resource. Moreover, the exploitation method has the advantages of easy operation, safety and reliability and significant economic benefits.

The invention discloses a production method and a production system of an ultrahigh molecular weight polyethylene compound oil pipe. The method utilizes the memory property of the ultrahigh molecular weight polyethylene material and a special composite technology: conducting hole shrinkage treatment on an ultrahigh molecular weight polyethylene lining pipe with outer diameter larger than the inner diameter of a steel pipe, sheathing in the steel pipe, heating to restore inner diameter of the ultrahigh molecular weight polyethylene lining pipe, and forming the lining pipe with the steel pipe into an integral structure to reach a compactness and firmness without layering and stripping. By introducing additives, the invention greatly improves liquidity of the ultrahigh molecular weight polyethylene in order to produce the inner lining pipe with small wall thickness and reduce cost. The ultrahigh molecular weight polyethylene compound oil pipe provided by the invention comprehensively reserves specific superior performances of good memory property, high impact resistance, good temperature resistance, wear resistance, corrosion resistance, wax precipitation and fouling resistance of ultrahigh molecular weight polyethylene pipe. The invention also discloses a production system supporting the production method.

The invention discloses a method and a device to test anti-scaling and anti-wax precipitation properties of tubular products. A corrosion resistant centrifugal pump through one end of a conveying pipe is communicated with the other end of a test medium tank and a test tube; the other end of the test tube through a conveying pipe is communicated with the test medium tank; a flow control valve and a digital display fluid flowmeter are arranged on the conveying pipe between the corrosion resistant centrifugal pump and the test tube; a temperature control system for the control of test medium temperature is arranged in the test medium tank; by setting the flow control valve and the digital display fluid flowmeter, the effect of the medium velocity on the anti-scaling and anti-wax precipitation properties of the tubular product can be inspected; and by adding the temperature control system, the effect of medium temperature on the anti-scaling and anti-wax precipitation properties of the tubular product can be inspected. The invention fully considers the simulation of the actual scaling and wax precipitation conditions of tubular products, and has the characteristics of reasonable design, simple structure of test device, convenient operation, fastness and intuition.

The invention relates to a urushiol-silicon nano anticorrosive coating and its preparing method, mainly solving the problem of worse hydrophobic and oleophobic properties of existing metal anticorrosive coatings. Its characteristic: it includes the following components in weight percent: urushiol-silicon resin 30%-40%, epoxy resin 1%-3%, and nano rutile 1%-3%. It has the resistance to strong acid, strong base and salt solution, high rigidity, shock resistance and temperature resistance, and low hydrophobic and oleophobic properties of the surface, i.e. it has the properties of prevent wax precipitation and fouling.

The invention relates to a micro paraffin inhibitor used for a high-temperature high-salt oil well and a preparation method thereof. The microbe antiwax remover comprises the following components in percentage by weight: 15.0%-25.0% of industrial salt; 4.0%-8.0% of inorganic ammonium salt; 2.0%-4.0% of inorganic phosphorus salt; 10.0%-20.0% of starch; 5.0%-15.0% of bacillus strains and the balance of water. The raw materials and water are added into a fermentation tank with stirring, temperature control and vacuum systems according to a certain proportion, are uniformly stirred, heated to 121 DEG C for sterilization for 30 minutes, then slowly cooled to 95 DEG C, the bacillus strains are added into the fermentation tank according to proportion, then the temperature is reduced to 55-60 DEG C, and heating is stopped after 48 hours of fermentation; and the mixture in the fermentation tank is cooled to a normal temperature when being stirred so as to obtain the needed microbe antiwax remover. The microbe antiwax remover disclosed by the invention can effectively control the wax precipitation of the high-temperature high-salt oil well, and has strong reliability in use, a good effect and high economic benefits.

The invention reduces wax precipitation temperature when using refrigerator oil with main components of low level hydrocarbon refrigerant and hydrocarbon-based oil. The invention is refrigerator oil for hydrocarbon refrigerant. The refrigerator oil is used for hydrocarbon refrigerant with 1 to 5 carbon atoms, characterized in that the refrigerator oil contains at least one of the hydrocarbon-based oil of 100 mass parts, vulcanized grease and vulcanized olefin of 0.001 mass part to 0.05 mass part. Preferably, the hydrocarbon-based oil is mineral oil with %Cp greater than 40, flow point less than or equal to -27.5 deg C and kinematic viscosity 40 deg C. In addition, the refrigerant is preferably propane or isobutene.

The invention relates to a delivery pipe cleaning device, which comprises a ball storage drum. The upper end of the ball storage drum is communicated with an oil inlet pipeline; the upper end of the ball storage drum is provided with a quick assembly joint for connecting a hydraulic tool; the hydraulic tool is used for filling a pipe cleaning ball into the ball storage drum; the lower end of the ball storage drum is communicated with an oil outlet pipeline; and the lower end of the ball storage drum is provided with delivery equipment for delivering the pipe cleaning ball into the oil outlet pipeline from the ball storage drum. The delivery equipment comprises a motor and a delivery executor which are connected, wherein the motor drives the delivery executor to run; and the delivery executor is communicated with the oil outlet pipeline and delivers the pipe cleaning ball into the oil outlet pipeline from the ball storage drum. The device avoids the problems of wax precipitation and blockage caused by cooling crude oil; and the ball storage pipeline does not need to be heated for freeze protection, so the device is simple to maintain. Moreover, the device can deliver the ball under the conditions of no emptying, oil release and pressure release, and ensure a healthy, safe and environment-friendly delivery operating process.

The invention provides an electromagnetic paraffin-inhibiting viscosity reducer comprising a power supply control cabinet and a magneto-calorific generator which are connected with each other through a cable. The electromagnetic paraffin-inhibiting viscosity reducer is characterized in that the magneto-calorific generator comprises an inner tube, a coil is wound on the external circle of the inner tube, and a temperature sensor is arranged in the outermost layer of the coil; a housing is arranged outside the inner tube, end screw plates are arranged at two ends of the housing, and a junction box is arranged at the external circle of the housing and connected with the coil, the temperature sensor and one end of the cable. According to the electromagnetic paraffin-inhibiting viscosity reducer provided by the invention, the defect of the prior art is overcome, a certain electromagnetic force and temperature can be generated, the crude oil flowing through the electromagnetic paraffin-inhibiting viscosity reducer can be physically modified, the wax precipitation and the deposition of crude oil in the tube are prevented, the viscosity of the crude oil is reduced, and thus, the oil extraction yield and the pipeline transport efficiency are increased, and the periods of pump detection and pipeline paraffin cleaning are prolonged.

The invention provides equipment and a method for measuring the temperature of a wax precipitation point of crude oil. The equipment comprises a high-pressure container for bearing crude oil to be measured, a heat preservation device, a first ultrasonic probe for transmitting ultrasonic waves, a second ultrasonic probe for receiving ultrasonic waves, an ultrasonic transmitter-receiver and a temperature sensor for monitoring the temperature in the high-pressure container in real time. The first ultrasonic probe and the second ultrasonic probe are arranged in the high-pressure container, and the tail part of the first ultrasonic probe and the tail part of the second ultrasonic probe penetrate out of the outer wall of the high-pressure container; the tail part of the first ultrasonic probe and the tail part of the second ultrasonic probe are connected with the ultrasonic transmitter-receiver. According to the equipment and the method provided by the invention, an acoustic parameter variation curve diagram in a crude oil cooling process is obtained by using an ultrasonic technology so as to obtain the temperature of the wax precipitation point of the crude oil to be measured according to the acoustic parameter variation curve diagram, and thus the temperature of the wax precipitation point of gas-containing crude oil of a high-temperature and high-pressure stratum is accurately measured.

A vortex oil and gas mixed delivery system with a function of casing natural gas recycling and crude oil delivering for oil wells relates to the recycling and delivering technology of casing natural gas and crude oil at wellheads and is applied to recycling casing natural gas, reducing kinematic viscosity in crude oil delivery, realizing uniform delivery of the natural gas and the crude oil in the same pipeline and reducing wax precipitation and blockage in crude oil delivery during crude oil exploration. By recycling the natural gas generated during crude oil exploration and pressurizing, the crude oil and the natural gas can be delivered mixedly, benefit of crude oil exploration is maximized, benefits and safety are guaranteed by the aid of pressurizing delivery of a gas delivery pump, flow-state optimization of a vortex mixer, full-automatic working control and safety protection.

The invention relates to special oil extraction equipment for oilfields, in particular to a nonmetal composite continuous tube and an electrical submersible pump system. The technical scheme of the nonmetal composite continuous tube includes that a cable is embedded in the wall of the nonmetal tube, the wall of the nonmetal tube successively consists of an inner tube (9), an inner-layer steel wire mesh (10), an embedding layer (11), an outer-layer steel wire mesh (12), a protecting layer and the like from inside to outside, and the cable is located in the embedding layer (11). The electrical submersible pump system comprises the nonmetal composite continuous tube, and mainly consists of the nonmetal composite continuous tube, a wellhead device and an underground unit. Due to application of the nonmetal composite continuous tube and the electrical submersible pump system, complexity degree of pump descending and ascending operation can be reduced, and viscosity of produced liquid can be reduced and wax precipitation of the wall of the tube can be prevented by the aid of heat of the cable.

The invention discloses a heating device of a diesel oil filter. In a technical scheme provided by the invention, the heating device of the diesel oil filter comprises a heating base and a shunting device, wherein the heating base is internally provided with a heating pipe; by means of a heat exchange effect between ceaseless hot water in the heating pipe and diesel oil in an oil filter shell, the temperature of the diesel oil to be introduced into an engine combusting system is increased, so that high-grade fuel oil under a low-temperature environment can be prevented from the phenomena of thickness and even wax precipitation to block a filter screen. The heating base not only has a heating function but also has sealing, mounting and other functions as common filter top cover. The heating device disclosed by the invention has the advantages of ingenious conception, simple structure, good sealing performance, low cost, superior performance, convenience in use, energy-saving and emission-reduction performance, and the like.

The invention provides an electromagnetic paraffin prevention paraffin viscosity reduction device capable of changing frequency and a strong field. The electromagnetic paraffin prevention paraffin viscosity reduction device is characterized by comprising a magnetic field generating device. The magnetic field generating device comprises an inner tube arranged in the middle of an outer shell, a coil is wound on the periphery of the inner tube, a wire connecting box is arranged on the outer shell, terminals are arranged inside the wire receiving box and connected with the coil and one end of a cable, and the other end of the cable is connected with a power supply control box. The electromagnetic paraffin prevention paraffin viscosity reduction device capable of changing the frequency and the strong field overcomes the defects in the prior art, can generate an electromagnetic field of set frequency and intensity alternation, meanwhile, due to the fact that a winding form of the inductance coil is in a step shape, magnetic field intensity in the inner tube is distributed in a stair-step-shaped mode, the electromagnetic paraffin prevention paraffin viscosity reduction device capable of changing the frequency and the strong field can physically change property of crude oil, an optimal effect is achieved, the phenomena of wax precipitation and sinking of the crude oil in the pipeline are effectively prevented, viscosity of the crude oil is reduced, and therefore oil production quantity and pipeline transport efficiency are improved, and periods of pump inspection of an oil pump and wax removing of a pipeline are prolonged.

The invention relates to a dynamic simulation and evaluation device for a chemical paraffin remover and an evaluation method. According to the technical scheme, an experiment simulation pipeline is fixed in an inner cavity of a constant-temperature water bath through a pipeline fixing bracket, the lower end of the experiment simulation pipeline is connected to a piston pump, and the piston pump is driven by a motor and connected with a sample tank; a liquid drainage pipe is connected to the upper end of the experiment simulation pipeline, a liquid drainage port plug valve is arranged at the tail end of the liquid drainage pipe, and a recovery tank is arranged below the liquid drainage port plug valve. The dynamic simulation and evaluation device has the benefits as follows: pressure, temperatures, flow, the flow speed and the like can be adjusted and controlled by means of the experiment simulation pipeline to simulate the dynamic process of petroleum and the paraffin remover in the pipeline; a pipe diameter, wax precipitation composition and other parameters are adjusted, the actual technological parameters in the field application process are simulated, dynamic simulation and evaluation of the paraffin remover are realized, the field application effect of the paraffin remover is relatively directly reflected, and the research time of the paraffin remover is shortened.

An oil well alloy superconducting wax and pressure-measuring and temperature-measuring device comprises a cable body and a control system, wherein the cable body penetrates into a hollow oil pumping rod; temperature sensors for measuring different depth sections of an underground wax precipitation area are distributed in the cable body; a pressure transmitter is arranged at the bottom of the cable body; the temperature sensors and the pressure transmitter are electrically connected with the overground control system through leads which penetrate into the cable body; the control system comprises a controller; the input end of the controller is connected with the temperature sensors and the pressure transmitter; a superconducting alloy wire is arranged in the cable body and is electrified with power-frequency or medium-frequency alternating current. On one hand, the oil well alloy superconducting wax and pressure-measuring and temperature-measuring device can generate high heat, can heat crude oil of the wax precipitation section in an oil pipe in the whole process, effectively prevents the crude oil in the oil pipe from being subjected wax precipitation and does not influence the service life of the cable body; on the other hand, the measuring precision of each sensor can be greatly improved.

The invention discloses a mechanical petroleum pipeline inner wall impurity cleaning device which comprises a frame table plate, a positioning mechanism, a driving gearbox and a servo motor. A first lead screw is mounted on the frame table plate through a plurality of lead screw seats, the servo motor drives the first lead screw to rotate, a first lead screw nut is mounted on the first lead screw,the first lead screw nut and the first lead screw form screw pair transmission, the driving gearbox is fixedly mounted on the first lead screw nut, a motor is mounted in the driving gearbox, a rotating shaft is connected with an output end of the motor, a second lead screw is arranged outside the rotating shaft in a sleeving manner, and the rotating shaft and the second lead screw synchronously rotate through a synchronous block. The cleaning device has the advantages that the second lead screw nut pushes two connecting rods to approach each other, so that a plurality of cutting blades are expanded outwards relative to the rotating shaft under the action of the connecting rods, cutting teeth contact with the inner wall of a petroleum transmission pipeline, wax precipitation is efficientlytreated, and the device can automatically adapt to petroleum transmission pipelines with different pipe diameters and is convenient to operate and high in cleaning efficiency.