61results about How to "Prevent waxing" patented technology

A fuel heater for a tank includes an elongated member that fits through an opening in the tank. The elongated member includes a first tube that defines a fuel channel and ends with a bottom fuel intake. Fuel may be drawn from the tank and conveyed by a supply side line coupled to the first tube. A second tube of the elongated member is coupled to a return side line that conveys warmed fuel back to the tank. A third tube substantially coaxially surrounds the first tube, and an outlet of the second tube enters the third tube. A heat trace may be employed to warm the fuel. Accordingly, the temperature of fuel in the tank may be maintained above the cloud point temperature.

A shell in shell hearing aid system and hearing aid wax guard apparatus. The hearing system includes a hearing aid electronic and transducer unit having a housing and stem. The system further includes a custom shell component that is formed for affixation around the stem. The system further includes an end cap that connects to the end of the stem and holds the custom shell around the stem. The end cap can be the hearing aid wax guard apparatus having a series of flap seals, a bell-shaped dome and tear drop speaker opening.

The invention discloses a technology for synthesizing methanol. The technology comprises the following steps: generating methanol by a methanol synthesis gas containing fresh gas through a first reactor; exchanging the heat of the mixed gas containing the synthesis gas and methanol steam with the heat of the synthesis gas containing fresh gas to be fed into the first reactor and then generating methanol through a second reactor; cooling the synthesis gas in higher methanol concentration after the reaction, and then guiding into a methanol separator and separating methanol; mixing the synthesis gas after separating methanol with fresh gas, thereby acquiring the synthesis gas containing fresh gas; guiding the synthesis gas containing fresh gas into the first reactor again; utilizing a valve A to directly guide a part of fresh gas into the second reactor and controlling the hot-spot temperature of a catalyst bed of the second reactor within 250 DEG C; keeping a part of synthesis gas containing fresh gas free from heat exchange and directly introducing into the first reactor by a valve B; controlling the gas inlet temperature of the second reactor at 200-240 DEG C. According to the invention, the use ratio of the catalyst is increased, the quality of the methanol product is improved and the running stability of the production device is improved.

The invention relates to an emulsion type paraffin remover and inhibitor and a preparation method thereof, and belongs to the technical field of oil exploitation. The emulsion type paraffin remover and inhibitor includes, by weight, 45%-60% of 150# solvent oil, 4.5%-6% of octylphenol polyoxyethylene ether, 4.5%-6% of fatty alcohol-polyoxyethylene ether, 2.25%-3% of polyoxyethylene sorbitan monostearate, 3%-4% of ether cosolvent, and the balance water or synthetic brine. According to the emulsion type paraffin remover and inhibitor, the paraffin dissolution rate is more than 0.022 g / min, the paraffin inhibition rate is more than 75%, and oil well paraffinication can be effectively prevented. The emulsion type paraffin remover and inhibitor has good paraffin removing and inhibiting effects.

The invention belongs to the field of oil extraction equipment in oil fields, and in particular relates to a constant-temperature heat tracing carbon fiber continuous sucker rod, and a preparation device and a preparation method thereof. The sucker rod comprises a carbon fiber core, a glass fiber layer coating the outer side of the carbon fiber core, and an epoxy resin layer coating the outer side of the glass fiber layer, wherein an electric heating strip A is arranged at the center of the carbon fiber core, the carbon fiber core is formed by carbon fiber bundles adhered by resin, the glass fiber layer is composed of a glass fiber winding layer and a longitudinal glass fiber layer, the glass fiber winding layer is wound on the outer side of the carbon fiber core, and glass fibers and carbon fibers forming the longitudinal glass fiber layer are arranged in parallel. The sucker rod provided by the invention is simple in technology and reasonable in layout; according to the preparation method provided by the invention, the multi-layer friction-resistant continuous sucker rod with a constant-temperature heating function and being capable of preventing paraffin precipitation can be produced, and the produced sucker rod has the multiple advantages of light weight, friction resistance, and high torsional strength, shearing strength and tensile strength.

The invention discloses rod blockage prevention liquid for carbon dioxide huff-puff enhanced oil recovery and an injection method thereof, which mainly solve the problem of well blockage caused by a large quantity of paraffin deposits on the inner wall of an oil pipe during carbon dioxide huff-puff enhanced oil recovery operation. The rod blockage prevention liquid comprises the following components in percentage by mass: 40 to 50 percent of glycol, 3 to 5 percent of carbon dioxide corrosion inhibitor, 5 percent of anti-expanding agent, 2 percent of anti-scaling agent, 2 percent of surfactantand the balance of water. A pressure gauge (1), a one-way valve (2), a valve (3) and an agent feeder are arranged at the port of a well mouth casing; the rod blockage prevention liquid is injected into a well through the agent feeder; a pumping unit is not stopped during the injection of the agents; when a large amount of rod blockage prevention liquid occurs at the well mouth, the pumping unit is stopped at a lower dead point; and an agent injection device is disassembled and the port of the well mouth casing is closed well. The rod blockage prevention liquid can soften the paraffin depositsin the oil pipe and prevent well blockage; and the injection method of the rod blockage prevention liquid is simple, is easy to operate and is low in cost.

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 relates to the field of oil well oil pumping equipment and particularly relates to a viscosity reduction treatment tank for oil pumping of an oil well. The viscosity reduction treatmenttank comprises two oil pumping devices, a treatment tank, a stirring viscosity reduction mechanism, an oil filtering pipe, a heat-exchange viscosity reduction pipe, a driving motor, a rotary stirrer and a transmission wheel, wherein the treatment tank comprises a tank body, a tank cover and two oil pumping pipes; the tank cover is connected to the top end of the tank body in a sealing manner; theoil pumping pipe is fixedly connected and communicated to each of two sides of the bottom end of the tank body; the upper ends of the two oil pumping devices are rotatably and cooperatively connectedto the inner side of the tank body, and the lower ends of the two oil pumping devices are respectively connected to the inner sides of the oil pumping pipes; and the upper ends of the oil pumping devices are meshed and connected to the inner ends of the transmission wheel, and a plurality of rotary stirrers are in transmission connection to the outer end of the transmission wheel. According to theviscosity reduction treatment tank, multiple works of raw oil pumping, stirring viscosity reduction, oil liquid filtration, heat-exchange viscosity reduction and the like can be realized, the raw oilpumping efficiency is improved, and the viscosity of the raw oil is effectively decreased.

The invention relates to a rare earth high-efficiency strong-magnetism anti-scaling device which comprises a coupler, a rare earth strong-magnetism array and a pressurizer which are connected in series through a hollow pipe. The coupler is used for assembling the rare earth high-efficiency strong-magnetism anti-scaling device on the pipe in front of a pump body. The rare earth strong-magnetism array comprises a plurality of groups of rare earth strong magnets which are evenly arranged around the pipe, each group of rare earth strong magnets comprise an even number of arc magnets evenly arranged around the outer peripheral face of the pipe, the magnetic poles are pointed at the arc circle center, and a strong magnetic field is formed on the cross section of the pipe. A plurality of flow guide holes not arranged on the same plane as the pipe central axis are formed on the pressurizer, and the flower guide holes are sequentially inclined through a certain angle towards the same direction around the pipe central axis. Fluid output from the pressurizer enters the pipe provided with the rare earth strong-magnetism array in a multi-strand spiral rising mode to be magnetized by the formed strong magnetic field, and physical property change of the fluid occurs accordingly.

The invention discloses an intelligent water content detecting device for a wellhead. The intelligent water content detecting device comprises a production pipeline and a metering pipeline which communicates with the production pipeline, wherein an inlet end of the metering pipeline communicates with an inlet of the production pipeline through a three-way valve; an outlet of the metering pipelinecommunicates with an outlet of the production pipeline through a valve; a heating device is arranged on the outer side wall of the metering pipeline; and a detector which extends to the lower end of the metering pipeline from the upper end of the metering pipeline and is distributed with a plurality of water-oil sensors is mounted at the inner side of the metering pipeline. The intelligent water content detecting device avoids inaccurate sampling through an integral sampling mode of the metering pipeline, can be used for directly heating the metering pipeline, and prevents a probe from the scaling problem and the wax-precipitating problem. An oil-water interface of a sealing tube section is measured through the water-oil sensors, so that influences, on water content measuring, of an oil-in-water state and a water-in-oil state are prevented.

The invention relates to an anti-waxing coating for oil pipelines. The anti-waxing coating is composed of primer and finish paint, wherein the weight ratio of the primer to the finish paint is 100:(2-5); the primer comprises 10-30% of polyurethane, 5-15% of epoxy resin, 5-15% of unsaturated polyester, 1-8% of inorganic fillers, 2-10% of a flatting agent, 0.05-2% of a defoaming agent and the balance of a solvent; the finish paint is a perfluorinated polyether derivative. The invention further provides a preparation method of the anti-waxing coating for oil pipelines. The anti-waxing coating is hydrophobic, oleophobic, corrosion-resistant, low in surface energy, high in anti-waxing efficiency and high in bonding strength with a substrate, can be used for solving the problems of waxing prevention of inner walls of oil storing equipment and oil refining equipment, and can further be used for solving the problems of antifouling and algae prevention of ships, racing boats or submarines, as well as antifouling and algae prevention of buildings.

The invention discloses a non-return temperature-control valve. The non-return temperature-control valve comprises a valve seat and a bonnet; a valve plate is tightly pressed against an annular supporting seat by a spring so as to seal a lower-part round pipe when the spring is in the free relaxed state; double metal sheets are arranged inside an upper cavity; when the temperature at a bonnet oiloutlet is higher than 58 DEG C, the double metal sheets bulge upwards and seal an annular sealing bulge; and when the temperature at the bonnet oil outlet is lower than 28 DEG C, the double metal sheets bulge downwards and are separated from the annular sealing bulge. The invention further discloses a modular environment-friendly fuel filter adopting the non-return temperature-control valve. The fuel filter comprises a casing; a top cover is arranged at the top of the casing; a manual oil pumping structure is arranged inside the top cover; a straight-through type filter element is arranged atthe upper part inside the casing; and a float water-level alarm and the non-return temperature-control valve are arranged inside the casing and located below the straight-through type filter element.By the aid of the non-return temperature-control valve and the fuel filter, air is removed through manual oil pumping, fuel is filtered, the fuel inside the fuel filter is heated by the aid of returned oil of an engine, blockage of the filter element due to inside wax precipitation of the fuel is prevented, and energy is saved.

The invention relates to the field of petroleum exploitation equipment, in particular to ultrasound wax prevention and viscosity reduction equipment for an oil-well wellhead. The equipment includes anoil inlet cylinder, a stirring and wax prevention cylinder, a stirrer, multiple vibrators, an ultrasound viscosity reduction cylinder, ultrasonic transducers, a front bracket, a rear bracket and a base plate. The oil inlet cylinder is fixedly connected with the front side of the top of the base plate through the front bracket, the rear end of the oil inlet cylinder is sealingly connected and communicated with the stirring and wax prevention cylinder, the rear end of the stirring and wax prevention cylinder is sealingly connected and communicated with the ultrasound viscosity reduction cylinder, the stirrer is rotatably and cooperatedly connected with the inner side of the stirring and wax prevention cylinder, the inner side face of the stirring and wax prevention cylinder is uniformly andfixedly connected with several vibrators, and the inner side of the ultrasound viscosity reduction cylinder is fixedly connected with the several ultrasonic transducers. The equipment can be used forjet-stream whirl, stirring and viscosity reduction, vibration crushing and ultrasonic wax prevention processes of crude oil, and can effectively prevent wax deposition in the extraction or transportation processes of the crude oil, the viscosity of the crude oil is reduced and the transportation efficiency is easily improved.

The invention discloses a gas-preventing oil well lifting system and belongs to the field of oil recovery. The gas-preventing oil well lifting system comprises a casing and an oil pipe. The oil pipe is arranged in the casing in a sleeving manner. The system also comprises a heavy ball pump, a gas-preventing device and a tail pipe separately located in the casing; the lower port of the oil pipe communicates to a liquid outlet of the heavy ball pump and a gas lifting valve is arranged at the lower port; the gas-preventing device is used for separating crude oil and gas in an annulus of an oil jacket, and is provided with an inlet, an exhaust port and an oil drain outlet communicating to the liquid inlet of the heavy ball pump; the upper port of the tail pipe is connected to the gas-preventing device and the lower port is closed. The gas-preventing oil well lifting system can separate the crude oil and the gas in the annulus of the oil jacket effectively through the gas-preventing device,not only can prevent the gas from entering into the heavy ball pump, improve the pressure at the pump inlet so as to improve the pump filling coefficient and the pump efficiency, but also can feed the separated gas into the oil pump to be mixed with the crude oil in the oil pipe, so that lifting-assisting and load-reducing action is exerted.

The invention particularly provides a downhole ray type water content monitor which comprises a shell. The upper end and the lower end of the shell are provided with an upper connector and a lower connector respectively. A central passageway vertically penetrates through the shell. A radioactive source installation base, a radioactive source, a transmission detector, a scattering detector, a circuit board and a battery pack are arranged between the shell and the central passageway. The radioactive source is installed on the radioactive source installation base obliquely. The transmission detector is arranged on a light ray circuit of the radioactive source and located on the side opposite to the radioactive source. The scattering detector is arranged above the radioactive source, and the included angle between the scattering detector and the light ray circuit of the radioactive source is 90 degrees. The battery pack is installed at the lower end of the shell. The circuit board is arranged between the scattering detector and the battery pack. The radioactive source and the circuit board are electrically connected with the battery pack. By means of the downhole ray type water content monitor, errors which are caused by contained water to water content measurement are eliminated, the water contents of all layer sections of a tubular column multi-section fracturing horizontal well are monitored and rapidly measured, the water content measuring cycle is shortened, and the water content measuring accuracy is improved.

The invention relates to the technical field of vehicle fuel systems, and discloses a fuel temperature control valve. The fuel temperature control valve comprises a first joint, a second joint and a third joint which communicate with one another, wherein a wax type sensor is installed in a hole of the first joint, an induction end of the wax type sensor extends out of the first joint, and the other end of the wax type sensor is provided with a push rod; the push rod abuts against a valve which slides in the hole of the first joint, the other end of the valve is provided with a first spring abutting against the valve, a first valve port cooperating with the valve is arranged in the first joint, a pressure valve and a second valve port cooperating with the pressure valve are arranged in thesecond joint, and a second spring which inwards abuts against the pressure valve is arranged in the second joint; and the invention further discloses fuel temperature control system of a vehicle usingthe fuel temperature control valve. According to the fuel temperature control valve and the vehicle fuel temperature control system, the high-temperature returned oil is controlled to enter a filteror a fuel tank according to the temperature of the fuel in the filter, so that the whole performance of the whole vehicle is improved.

The invention provides a suspension type underground hydraulic rod type pumping production device which comprises a hydraulic cylinder, a hydraulic pipe communicated with the hydraulic cylinder, a hydraulic control cabinet and a rod type oil-well pump. A hollow sucker rod is communicated to the upper end of the hydraulic cylinder. The hollow sucker rod and the other end of the hydraulic pipe are connected with the hydraulic control cabinet. The rod type oil-well pump is connected with the hydraulic cylinder. The rod type oil-well pump is arranged in an oil pipe. The hydraulic cylinder is arranged above the oil pipe. The lower portion of the oil pipe is provided with a supporting slip. The oil pipe is sleeved with a packer. Pipe rod eccentric wear is eliminated, and the oil well maintenance-free period can be prolonged; the hollow sucker rod is adopted as a hydraulic transmission pipe, the heat of high-temperature hydraulic oil can be transferred to a well shaft, and paraffinning is effectively prevented. The device adopts a casing pipe oil extraction mode, only one or two oil pipes are needed, the operation process is simplified, and the operation cost is reduced.

The invention discloses a composite coating for a downhole oil pipe and an applying method thereof, and belongs to the technical field of oil field oil production. The composite coating for the downhole oil pipe comprises epoxy resin primer, an aerogel composite coating intermediate heat preservation layer and glass flake paint finish paint; an aerogel composite coating comprises, by weight, 10-20parts of silicon dioxide aerogel, 60-120 parts of a self-crosslinking acrylic emulsion, 15-30 parts of glass wool, 5-15 parts of titanium dioxide, 3-10 parts of hydroxyethyl cellulose, 10-30 parts ofsodium polyacrylate and 10-20 parts of ammonium hydroxide; and glass flake paint comprises, by weight, 40-50 parts of modified epoxy resin, 30-35 parts of glass flakes, 3-5 parts of a silane couplingagent, 5-10 parts of a diluent, 5-10 parts of alundum powder and 10-20 parts of an epoxy hardener. According to the composite coating for the downhole oil pipe, the problems that when an aerogel coating is applied to the downhole oil pipe, moisture absorbing and cracking under the influence of water are prone to occurring are solved.

The invention relates to the industry of petroleum exploitation and provides a high efficient wax-prevention viscosity reduction and oil increasing apparatus applied to underwell oil pumping. The apparatus comprises an oil pumping pipe and an oil pumping rod, wherein the lower end of the oil pumping rod is equipped with an oil pump; and the lower end of the oil pump is connected with a primary wax-prevention viscosity reduction oil increasing device. The high efficient wax-prevention viscosity reduction and oil increasing apparatus is characterized in that at least one sleeve rod type eddy flow strong magnetic device is inserted into a place where the lower section of the oil pumping rod is close to the oil pump; the rod type eddy flow strong magnetic device is provided with a connection rod; the middle part of the connection rod is covered with a magnetic ring set; the magnetic ring set is formed by at least three overall magnetic rings overlapped; same magnetic poles of opposite surfaces of each two overall magnetic rings are arranged; a splicing magnetic ring is inserted in each two overall magnetic rings; the same magnetic rings of two sector-shaped magnetic blocks oppositely arranged are arranged facing each other; and a coat is arranged outside the magnetic ring set to integrate all the magnetic rings into one. By the use of the high efficient wax-prevention viscosity reduction and oil increasing apparatus, crude oil viscosity can be reduced, wax precipitation can be prevented, flow capability can be increased and oil well production amount can be increased, so the apparatus is suitable for various oil production wells, such as plumb wells, inclined wells and horizontal wells.

The invention discloses a biological enzyme fracturing technology for oil fields and oil wells. The technology comprises the following steps of: connecting a ground pipeline, testing the pressure of a high-pressure pipeline, backwashing a well, starting a pump for fracturing till a fracturing pressure is displayed, and starting injection after the pressure is stable, wherein the injection has the sequence of: injecting an ahead fluid, injecting a base fluid, adding a cross-linking agent and a propping agent at the same time of injecting the base fluid, injecting a gel breaker, closing the mounting wellhead to build the pressure, controlling blow-out of a pressure oil pipe, and pulling out a shaft pipe column after the pressure of the wellhead is dispersed. The technology solves the problems of cold damage, water damage and residue damage, and has the advantages of good environmentally-friendly effect, wide application range, high compatibility, thorough gel breakage, simplicity in operation and high cost performance.

The invention discloses an oil well long-distance wireless monitoring system which comprises a programmable logic controller (PLC), wherein the PLC is connected with an oil well oil temperature detector, a big station water temperature detector, a converging pipe oil temperature detector, a converging pipe oil pressure detector and a metering room inflammable gas detector, and the PLC is provided with a signal transformation sending device, a signal transformation device and a comparator which is connected with a warning device. The oil well long-distance wireless monitoring system further comprises a well area centralized monitoring host used for receiving oil well related data information sent by the signal transformation sending device of the PLC through a wireless bridge, wherein the well area centralized monitoring host is provided with a decoder and a comparator which is connected with the warning device. By means of the operation of computer programs of the PLC and the well area centralized monitoring host, whether numerical indicators of an oil well are out of scope or not can be judged, and then whether the warning device is started or not can be determined. Therefore, labor intensity can be greatly reduced, and the operation states of the oil well in a well area can be well monitored.

The invention belongs to the field of oil extraction equipment in the oil field and especially relates to an intelligent driving device for an oil-well pump and a winding type pumping unit system. The intelligent driving device comprises a motor, a speed reducer, a winch, a wellhead bracket, a sucker rod and a frequency converting control device, wherein the sucker rod is divided into two sections which are respectively called as an upper sucker rod section and a lower sucker rod section; the two sucker rod sections are connected with each other through a sucker rod joint; the upper sucker rod section is arranged as a glass fiber rod; the lower sucker rod section is arranged as a steel sucker rod or a carbon fiber rod; communication cables and ribbon heaters are arranged in both of the upper sucker rod section and the lower sucker rod section; the communication cables and the ribbon heaters are butt-jointed through an electric connector at the sucker rod joint; the communication cables and the ribbon heaters are arranged in both of the upper sucker rod section and the lower sucker rod section. A flexible sucker rod in the intelligent driving device has a two-section type structure; the upper sucker rod section is made of a glass fiber rod with the minimal bending radius being less than that of the other material; compared with a carbon fiber rod, the glass fiber rod has the minimal bending radius which can reach about 0.5 m, so that the size of the winch can be effectively reduced.

The invention relates to the technical field of development of geothermal energy, in particular to a method for co-mining of terrestrial heat and oil gas in oil or gas mining. The method comprises thefollowing process flows: drilling a producing well, then running a casing and performing cementing, performing heat conduction cementing in a stratum high-temperature segment, and performing heat insulation cementing in a stratum low-temperature segment; performing perforation and fracture from the casing in an oil layer or a gas layer and taking as production channels, performing segmented perforation and fracture from the casing to a rock stratum within different heights, positioned in the stratum high-temperature segment, above the oil layer or the gas layer, and filling cracks with heat conductive fillers so as to form heat conduction bands extending from the casing to the rock stratum; running short pipes into positions of segmented perforation, and enabling expanding pipes to seal through holes ejected from the casing; putting a conveying pipe into the casing, and enabling the bottom end of the conveying pipe to stretch into the oil layer or the gas layer; installing packers below segmented perforation segments above the oil layer or the gas layer; and finally installing a condensing segment of a gravity heat pipe heat exchanger butted with the casing on the ground, and enabling the conveying pipe to go through the gravity heat pipe heat exchanger.

A downhole oil pipe and sucker rod heating device relates to the field of oil field exploitation, and aims to solve the problem of high power consumption of the existing downhole oil pipe and sucker rod heating methods. The invention includes an intermediate frequency heating power supply, an intermediate frequency transformer, a first metal layer arranged on the inner wall of the oil pipe, several guide plates arranged on the inner wall of the oil pipe, a second metal layer arranged on the surface of the guide plate, and a layer and the second metal layer power supply; the lower surface of the guide plate is in an inclined state along the circumferential direction, and the inclination directions of all the guide plates are consistent, and the whole is spiral along the inner wall of the oil pipe; the lower surface of the guide plate is along the diameter It is inclined in the direction and gradually rises along the inner wall of the oil pipe to the center of the oil pipe. The present invention can avoid waxing on the inner wall of the oil pipe as long as the temperature of the inner wall of the oil pipe is maintained. Compared with the traditional heating method, the power consumption is significantly reduced. Possibility of layered wax.

The invention relates to an over-long threaded heat pipe of a sucker rod, mainly solving the problems of heat transfer barrier of the inner part of the heat pipe and difficulty of effectively forming good single-phase flow heat transfer on the outer side of the heat pipe because the inner side of the heat pipe with a smooth wall surface in the prior art is difficult to effectively produce good two-phase boiling and condensation heat transfer. The heat pipe is characterized in that a cavity of a sealing cavity (12) is of a threaded pipe shape; the sealing cavity (12) comprises an upper blocking cover (5), a lower blocking cover (1) and the heat pipe of the sucker rod (2), wherein the upper blocking cover (5) is closely installed on the upper end of the sucker rod; the lower blocking cover (1) is closely installed in the lower part of the sucker rod; and the heat pipe of the sucker rod (2) is provided with working media between the upper blocking cover and the lower blocking cover. Because the inner surface and the outer surface of the pipe wall have threads which increase the area of heat transfer, the over-long threaded heat pipe of the sucker rod reduces the heat transfer barrier of the inner part of the heat pipe, strengthens the single-phase flow heat transfer on the outer side of the heat pipe, ensures the high-efficiency heat transfer of the heat pipe of the sucker rod, inhibits the wax precipitation of crude oil, reduces the viscosity of the crude oil, and ensures the normal operation of an oil sucking machine.

The invention relates to an airtight type fuel air heater. The heater comprises a machine box shell body, wherein a cold air inlet is formed in one side face of the machine box shell body, a hot air outlet is formed in the top surface of the machine box shell body, an electric part assembly is arranged in the middle of the machine box shell body, the electrical part assembly comprises an electrical part mounting board, the electrical part mounting board is provided with a transformer, a controller, a rectifier bridge and a filtering capacitor, a heater core assembly is arranged at the lower part of the machine box shell body, one end of the heater core assembly is connected with a fan, the fan is arranged at one end, close to the cold air inlet, of the heater core assembly, the other end of the heater core assembly is connected with the hot air outlet through a pipeline, an oil tank assembly and an electromagnetic pump assembly are arranged outside the machine box shell body, and the electromagnetic pump assembly is arranged below the oil tank assembly. The airtight type fuel air heater has the beneficial effects that the labor intensity of workers is reduced, the structure of theheater box body is good in overall gas tightness, the heating value is large, the overall stability is good, the shock resistance is good, the heater can realize remote operation to facilitate the operation of the personnel.

The invention relates to the related field of oil exploitation, in particular to an oil well paraffin removal device adopting centralized cooling. The oil well paraffin removal device comprises a machine body, the machine body is buried underground, a solidification cavity is formed in the machine body, and material conveying pipes penetrating through the upper end wall and the lower end wall of the machine body are fixedly connected in the end walls of the upper side and the lower side of the solidification cavity. A material conveying cavity communicating with the solidification cavity and the upper end and the lower end of the machine body is formed in the material conveying pipes. Oil can be conveyed from bottom to top through the material conveying cavity during actual work. A coolingdevice used for cooling oil is arranged in the material conveying cavity, and oil is cooled when passing through the device in the oil exploitation process. After the oil temperature is low to the paraffin deposition temperature, paraffin deposition can be performed on the inner wall in the device, and therefore paraffin components in oil are greatly reduced in the device, and paraffin depositionin a well wall during subsequent paraffin transportation is avoided; and paraffin on the inner wall can be scraped off after paraffin deposition is carried out for a certain period of time, paraffincan serve as accessory products of oil exploitation after being recycled in equipment, and the utilization rate of resources is increased.

The invention provides a solid polymer slow-release paraffin control ball and a preparation method and a use method thereof. The solid polymer slow-release paraffin control ball is formed by a high-molecular polymer, a surfactant, a density regulator and an oil auxiliary agent through high-temperature and high-pressure blending injection molding, and paraffin precipitation of a wellbore pipe rod of a producing well is delayed and prevented through the combined action of the high-molecular polymer and the surfactant, the high-molecular polymer has a long-chain alkyl structure similar to a wax molecule, and a polar chain link part of the high-molecular polymer enables a wax crystal and a crystal form to be distorted, so that the wax crystal is prevented from continuously depositing and growing; and the surfactant is adsorbed on the wax crystal surface or the wax precipitation surface, so that the polarity of the wax crystal surface is reversed, and the wax control effect is achieved. Thesolid polymer slow-release paraffin control ball is periodically and quantitatively added into an oil jacket annulus from a wellhead manually or in cooperation with automatic filling equipment, can directly reach an oil layer or a designed position, slowly and stably releases effective components in the oil well produced liquid soaking process, prolongs the paraffin removal period, reduces the oil well production cost, and guarantees the production efficiency and the crude oil yield.