594 results about "Steam injection" patented technology

The invention relates to a steam-jet pump system and a control method thereof, in particular to a variable-stage steam-jet pump system and a control method thereof, and solves the technical problems that an existing steam-jet pump system is difficult to realize switching of different working conditions and energy consumption is difficult to reduce. The variable-stage steam jet pump system comprises a gas collecting chamber and a gas jet pump unit connected with the gas collecting chamber, and the gas jet pump unit comprises a vacuum suction pipeline, a first-stage vacuum jet pump, a first-stage condenser, a second-stage vacuum jet pump, a second-stage condenser and a third-stage vacuum jet pump which are sequentially connected with the gas collecting chamber in the gas flow direction. The system further comprises a three-stage variable pump, a four-stage vacuum jet pump, a steam conveying unit and a cooling water conveying unit. The water supply reliability is greatly improved, and the long-time operation stability of the steam-jet pump system is guaranteed. According to the control method, ignition tests of engines with multiple thrust magnitudes and multiple working heights can be completed.

A molten salt heating direct-flow type wet saturated steam generation system, comprising an evaporation device, a molten salt conveying device, a preheating device, a softened water conveying device, and a dryness adjustment device. The evaporation device is provided with a first heat exchange pipeline and a second heat exchange pipeline; the molten salt conveying device comprises a molten salt conveying apparatus and a molten salt recovery apparatus; the preheating device is provided with a first preheating pipeline, and an outlet of the second heat exchange pipeline is connected to a steam output pipeline; and the dryness adjustment device comprises an adjustment member and a dryness measurement apparatus. According to the steam generation system provided by the present invention, the temperature of softened water and the temperature of molten salt can be adjusted to appropriate ranges, avoiding the crystallization of the molten salt; moreover, the dryness of wet saturated steam can be controlled by means of coarse adjustment and fine adjustment, and the direct-flow type evaporation device is suitable for softened water having poor quality so as to meet the steam injection requirements of oil fields.

The invention discloses an adjustable critical flow injection allocation valve suitable for a thermal production well and a regulation and control method of the adjustable critical flow injection allocation valve. The technical problems that the tool preparation efficiency is low and the like are solved. The device comprises a supporting body, a plurality of mounting grooves are formed in the supporting body, a steam injection valve is arranged in at least one mounting groove, sealing plugs are arranged in the other mounting grooves respectively, an annular steam flow channel is formed in the inner wall of the supporting body, and the mounting grooves communicate with the steam flow channel; the steam injection valve comprises a valve body, a Venturi nozzle, a valve rod, a limiting part and a reducing part, step faces with the outer diameters sequentially reduced from top to bottom are formed on the surface of the reducing part, the different step faces are aligned to the pore throat face by adjusting the position of the valve rod, the area of an annular flow channel can be adjusted, and therefore the injection allocation amount is adjusted. According to the injection allocation valve, the injection allocation amount can be adjusted, secondary punching machining does not need to be conducted on parts, nozzles of multiple specifications and sizes do not need to be prepared either, the tool preparation efficiency is improved, and therefore the operation time efficiency is improved.

The invention discloses a steam reinjection type gas-steam combined cycle system for waste heat recovery. The system comprises a gas turbine FGH / TCA system, a combustion chamber steam reinjection device and a waste heat boiler combined heat exchange module. The gas turbine FGH / TCA system is provided with an FGH heat exchanger and a TCA heat exchanger; a cold side inlet of the FGH heat exchanger is connected with a cold natural gas pipeline, and an outlet is connected with the combustion chamber; the hot side is communicated with a waste heat boiler water pumping and guiding pipeline. The hot side of the TCA heat exchanger is connected with a gas compressor pumping pipeline, and the cold side is communicated with a hot side outlet of the FGH heat exchanger. Part of outlet water from a high-pressure coal economizer and a medium-pressure coal economizer of the waste heat boiler heats cold natural gas to a set temperature in the FGH, then the cold natural gas is fed into the cold side of the TCA heat exchanger to absorb air exhaust heat of an air compressor to become superheated steam, and the superheated steam is injected into a combustion chamber and a cold reconnection box. The problem of unbalanced heat of the FGH / TCA system is solved, the combustion chamber is subjected to steam injection transformation, and the output power and efficiency of the system are improved.

The invention relates to the technical field of natural gas separation, in particular to a natural gas pipeline oil mist separation system which comprises a gas inlet end, an oil mist separation mechanism, an exhaust end and an oil dirt discharge mechanism, the gas inlet end comprises a natural gas inlet main pipe and two natural gas inlet branch pipes, and the natural gas inlet branch pipes are connected with a filtering device; the two groups of oil mist separation mechanisms are fixedly mounted on the filtering device and are used for separating and removing oil mist in the natural gas; the exhaust end comprises a natural gas outlet main pipe and two natural gas outlet branch pipes; and the oil mist discharging mechanism is connected with the oil mist separating mechanism and is used for recovering and treating the oil mist. The filtering device comprises a filter, and a filtering assembly composed of a filter element support, a coalescence sintering type filter element and a bearing is arranged in the filtering device. The oil mist separation mechanism comprises a high-pressure steam source, a steam conveying pipe, a steam branch pipe and a blade, and oil mist separation is achieved through steam injection. Oil mist in natural gas can be effectively separated, and the filtering efficiency and the natural gas quality are improved.

The invention relates to the technical field of chemical reaction equipment, in particular to a pulse intermittent water vapor bottom blowing coupling mechanical stirring enhanced mixing device which comprises a tank body, a sealing cover is mounted on the top surface of the tank body, a stirring assembly used for stirring the interior of the tank body is mounted on the sealing cover, the stirring assembly extends into the tank body, and the stirring assembly is connected with the tank body. An air outlet head is arranged at the bottom in the tank body, the air outlet head is communicated with a steam generation unit through an air supply pipe, and the steam generation unit is electrically connected with a pulse control unit used for sending variable frequency signals with adjustable pulse frequency to the steam generation unit. The steam injection frequency is controlled through the pulse control unit, the use amount of the steam is reduced, local high temperature generated by the system during continuous injection is avoided, the temperature is more uniform, meanwhile, convection can be further strengthened through nonlinear input, the periodic structure of the system is damaged, and the service life of the system is prolonged. And more chaotic flow regions are formed to enhance mixing and heat transfer efficiency, so that the production efficiency is improved, and the energy loss is reduced.

The invention discloses a uniform steam injection oil extraction pipe column which comprises an oil pipe, packers are arranged at the top and the bottom of each oil layer, the packers are located between the oil layers and a sleeve, the packers are fixedly connected with the oil pipe, one end of an adjusting screen pipe is connected with the packers, the other end of the adjusting screen pipe is connected with the oil pipe, an oil extraction valve is fixedly connected with the oil pipe, and a first screwed plug is installed at one end of the oil pipe. Oil layers are sleeved outside the oil pipe, and packers are arranged at the two ends of each oil layer; a first screwed plug is installed at one end of the oil pipe. According to the invention, the integration of injection and production is realized, the utilization time rate of an oil well is improved, the operation cost is reduced, and the adverse effect on the ground environment in the operation process is further reduced. Mutual interference between the high-pressure oil layer and the low-pressure oil layer in the oil extraction process is avoided, the reasonable steam injection amount of an oil reservoir is achieved, the oil reservoir development effect is greatly improved, and certain reference significance is achieved for development of complex oil reservoirs.

The embodiment of the invention provides a cascade heating superheated steam generation system and a control method thereof, and belongs to the technical field of energy engineering and thermal power. The system comprises: an evaporation device provided with a plurality of heat exchangers, wherein the evaporation device is used for treating preheated produced water into wet saturated steam; wherein the series-parallel connection relation between the heat exchangers in the evaporation device is adjusted based on real-time heat supply demand information; the steam conversion device is used for converting the wet saturated steam into superheated steam for steam injection; the control device is used for determining the serial numbers of the heat exchangers participating in heat exchange and the series-parallel connection relation of the heat exchangers participating in heat exchange based on the real-time heat supply demand information; the fused salt conveying device sequentially passes through the steam conversion device and the evaporation device and is used for providing a heat source for the steam conversion device and the evaporation device. According to the scheme, the method adapts to complex heat supply demand scenes, and therefore an efficient, flexible and intelligent solution is provided for thick oil steam injection.

The invention provides a steam ejector and an ejection method, and relates to the technical field of vacuum suction, the steam ejector comprises a negative suction pipeline, a steam ejection pipe is mounted on a square flange on the negative suction pipeline, a steam generation assembly is mounted at one end of the steam ejection pipe, and a noise elimination and speed reduction assembly is mounted at the other end of the steam ejection pipe; and the steam adjusting assembly is used for adjusting steam injected into the steam injection pipe. The technical problem that a steam ejector lacks a structure for reducing the temperature, flow velocity and noise of output steam is solved.

A water injection tubular column is installed in a sleeve, a water injection packer is arranged between the inner wall of the sleeve and the outer wall of the water injection tubular column, a steam injection tubular column is installed in the water injection tubular column, and the lower portion of the steam injection tubular column extends out of the bottom end of the water injection tubular column. A steam injection packer is arranged between the outer wall of the steam injection tubular column and the inner wall of the sleeve, the bottom of the steam injection tubular column is connected with a rod pump seat, and a pen point is installed at the bottom of the rod pump seat. A sucker rod is installed in the steam injection tubular column, the bottom of the sucker rod is connected with a rod pump, and the rod pump is installed on a rod pump base. By designing the water injection and steam injection huff and puff collaborative oil extraction concentric pipe column, water injection is carried out on a thin oil layer, steam huff and puff is carried out on a thick oil layer, and then pumping conversion production is carried out, so that two sets of different development layer series are used at the same time in one oil well, the well spacing number is reduced, and the block oil extraction speed is increased. Meanwhile, the tubular column further has a negative pressure oil extraction function, and the liquid production capacity of an oil well is improved.

The invention provides a method and a device for predicting a steam cavity in steam flooding by using an overlap factor, and belongs to the technical field of oil field oil extraction. The method comprises the following steps: determining an incidence relation between wellhead production characteristics of a first production well and a well bottom average temperature value, and determining a well bottom average temperature value of a second production well according to wellhead production characteristics of the second production well by utilizing the incidence relation; determining overlap factors of different displacement layer sections of the first production well; weighting the well bottom average temperature value of the second production well by using the overlay factor of each displacement layer section, and obtaining the well bottom correction temperature of each displacement layer section in the second production well in a one-to-one correspondence manner; and comparing the well bottom correction temperature of the second production well with the well bottom temperature of the steam injection well in the well group where the second production well is located, comparing the well bottom pressure of the second production well with the well bottom pressure of the steam injection well, and identifying the steam cavity of each displacement layer section of the second production well. By means of the method, rapid, accurate and low-cost recognition of the steam cavity is achieved.

Refrigerant circuit of a combined refrigeration system and heat pump with integrated steam injection circuit, wherein a 3-way valve (2) is arranged as a distribution point in the refrigerant circuit after a compressor (1), and an outdoor condenser / gas cooler (3), a main internal heat exchanger (5) and a check valve (6) as well as a connection point (19) are arranged in a refrigeration system line, and an indoor condenser / gas cooler (4) and a check valve (6) are arranged in a heat pump line,after which the heat pump line is joined to the refrigeration system line at the connection point (19) and the condensed or cooled refrigerant is subsequently led via an expansion device vapor injection (7) via the cold side of a secondary internal heat exchanger (8) to a medium-pressure chiller (9) and subsequently via a direct steam injection connection (18) into the compressor (1) and / or the condensed or cooled refrigerant is led via the warm side of the secondary internal heat exchanger (8) to an evaporator (12) and / or to a low-pressure chiller (13) before the refrigerant vapor is led via a liquid separator suction side (14) and the main internal heat exchanger (5) on the cold side to the suction side of the compressor (1).

The invention discloses an immovable string steam injection oil and gas production hydraulic lifting process, and relates to the technical field of mechanical oil and gas production equipment. According to the immovable tubular column steam injection oil and gas production hydraulic lifting technology, the working process of the immovable tubular column steam injection oil and gas production hydraulic lifting technology comprises the following steps that S1, in the ground working stage, ground equipment is composed and acts; and S2, the underground working stage is divided into an oil pumping process and a steam injection process, and the oil pumping process can also be divided into an upstroke stage and a downstroke stage. The frequency converter is adopted to adjust the frequency, a double-channel structure is adopted, resetting of the hydraulic lifting device is completed, the reciprocating mode achieves pumping of crude oil, due to the fact that a sucker rod is not arranged, the sucker rod is not stretched and shortened, and meanwhile when a pipe column is stretched and shortened, the feedback oil well pump is stretched and shortened as well, the effective stroke of the feedback oil well pump is prolonged, and the oil pumping efficiency is improved. The effective discharge capacity of the pump is improved, the tripping-in depth of the oil well pump can be effectively increased, and then the production potential of an oil well can be fully exerted.

The invention discloses a flue gas water-based three-phase foam system and a profile control method, the flue gas water-based three-phase foam system comprises dispersed-phase gas, suspended-phase solid particles and continuous-phase liquid, the liquid comprises the following components in percentage by weight: 0.5-2.0 wt% of a foaming agent, 0.05-0.5 wt% of a stabilizer, 0.05-0.2 wt% of a thickening agent, 0.1-0.8 wt% of a suspending agent, 0.3-1.0 wt% of inorganic salt and the balance of liquid preparation water; the gas comprises flue gas or mixed gas of one or at least two of nitrogen, natural gas, carbon dioxide, air and flue gas and the flue gas; the solid particles comprise one or a mixture of at least two of silicon dioxide particles, montmorillonite particles, bentonite particles, kaolin particles and fly ash particles, and the particle sizes of the solid particles are from nanometer to micrometer. According to the method, the flue gas discharged by the steam-injection boiler is captured and treated and then is injected into the stratum together with the water-based three-phase foam system and the steam segmented plug according to a certain proportion to assist in steam recovery of the thickened oil, so that the recovery rate of the thickened oil can be increased, the emission of greenhouse gases can be reduced, the capture, storage and utilization of CO2 can be realized, and the environmental protection situation requirements of carbon peak reaching and green development are met.

A water injection pipe column and a steam injection heat insulation pipe are installed in a casing pipe in parallel, a horn opening is formed in the bottom of the water injection pipe column, and an oil pipe centralizer is arranged between the water injection pipe column and the outer wall of the steam injection heat insulation pipe; a double-pipe packer is arranged among the inner wall of the casing pipe, the outer wall of the water injection tubular column and the outer wall of the steam injection heat insulation pipe, an eccentric packer is arranged between the outer wall of the steam injection heat insulation pipe and the inner wall of the casing pipe, the bottom of the steam injection heat insulation pipe is connected with a rod type pump seat, and a pen point is installed at the bottom of the rod type pump seat. A sucker rod is installed in the steam injection heat insulation pipe, the bottom of the sucker rod is connected with a rod pump, and the rod pump is installed on a rod pump base. Water injection is carried out on a thin oil layer, steam huff and puff is carried out on a thick oil layer, then rotary pumping production is carried out, the well spacing number is reduced, and the block oil extraction speed is increased. Meanwhile, the tubular column further has the functions of negative pressure oil extraction and strong oil pipe righting, liquid production of an oil well is improved, and oil pipe winding is prevented.

The invention relates to a method for treating shale oil crack wall surfaces by using carbon nanotubes to increase the heat transfer capacity of a reservoir, a plurality of horizontal wells are drilled from the ground, the horizontal sections of the horizontal wells form three parallel well rows, the uppermost well row and the lowermost well row are heating wells, and the middle well row is a production well. The fracturing fluid carrying the proppant is injected into the heating well and the production well with the displacement greatly exceeding the stratum absorption capacity, the bottom hole pressure is larger than the stratum fracture pressure, hydraulic fracturing is carried out, a tensional fracture area and a communication well group are generated, and meanwhile it is guaranteed that fractures are not closed after the proppant is filled. Under the condition that the pressure is lower than the formation fracture pressure, a weak acid solution is slowly squeezed into the heating well and the production well, the well wall and the crack wall face are treated, and a large number of corrosion micropores are formed. And under the condition that the pressure is lower than the stratum fracture pressure, a weak acid solution added with the carbon nano tubes is squeezed into the heating well and the production well, so that the carbon nano tubes are adsorbed or filled in the corrosion micropores, and the micropores where the carbon nano tubes are attached are formed. And high-temperature steam is circularly introduced into the heating well and the production well to heat the oil shale stratum. After heating for a certain time, stopping steam injection of the production well, and changing into production; and continuously injecting steam into the heating well. The method is suitable for an oil shale underground in-situ conversion exploitation technology, and is also suitable for geothermal exploitation and heavy oil thermal exploitation.

The invention relates to the technical field of boiler operation management, in particular to a boiler soot blowing steam consumption multi-dimensional data analysis system which comprises a dynamic database construction module, a steam consumption calculation model construction module, an evaluation module and an optimization strategy generation module. The dynamic database construction module is used for cooperatively acquiring the ash scale thickness value of the heating surface partition of the boiler through an infrared thermal imager and a sound wave thickness measuring device, and realizing structured time sequence data fusion in combination with steam parameters and working condition parameters; the steam consumption calculation model building module is used for building a multi-dimensional consumption data set based on space, time and energy efficiency dimensions; the evaluation module outputs a unit ash scale removal steam consumption value, an invalid steam injection proportion value and a regional energy efficiency deviation coefficient value; the optimization strategy generation module generates a soot blowing pressure gradient adjustment strategy and a steam saturation temperature compensation strategy through index correlation analysis, fine evaluation and control optimization of soot blowing energy efficiency can be achieved, and the boiler operation efficiency and the steam utilization rate are improved.

A first heating pipe, a second heating pipe and a third heating pipe are arranged in the device in the radial direction, each heating pipe comprises a wire section and a resistance section, the wire section is used for transmitting electric energy and comprises a high-temperature wire and a first mineral insulating material which are located in a protection pipe, and the resistance section is used for transmitting resistance to the high-temperature wire. The first mineral insulation material is filled in the protection tube and is used for insulation and heat conduction between the high-temperature wire and the tube wall; the resistance section is a heating section and comprises a high-temperature resistance wire located in the protection tube and a first mineral insulation material, and the first mineral insulation material is filled in the protection tube and used for insulation and heat conduction between the high-temperature resistance wire and the tube wall; the high-temperature wire is connected with the high-temperature resistance wire; and the tail ends of the three high-temperature resistance wires are connected to form a three-phase star-shaped balanced heating circuit, so that uniform heating is realized. And the protection tube is arranged, so that higher temperature and higher heating power can be borne, and the high-temperature wire and the high-temperature resistance wire are protected.

The utility model relates to a thermal recovery layered injection-production pipe column suitable for a highly-inclined directional well, which comprises a casing pipe, a heat insulation oil pipe, a jet pump, a high-temperature deep well safety valve, a high-temperature deep well thermal recovery packer, a heat insulation type compensator, an oil pipe and a plurality of target horizon combinations connected through the oil pipe, wherein the heat insulation oil pipe, the jet pump, the high-temperature deep well safety valve, the high-temperature deep well thermal recovery packer, the heat insulation type compensator and the oil pipe are arranged in the casing pipe and sequentially connected. Separation sealing combinations are arranged among the target layer combinations, and a thermal recovery exhaust valve is arranged on the high-temperature deep well thermal recovery packer and connected with an external control system through a hydraulic control pipeline. The thermal recovery layered injection and production pipe column suitable for the highly-deviated directional well can be safely lifted under the highly-deviated well condition, two different working conditions of steam injection and adoption are met, and a solution of layered steam injection, shaft heat insulation, shaft safety and injection and production integration is provided.

The embodiment of the invention provides a deep super heavy oil reservoir SAGD injection and production method and device and computer equipment, the method comprises the steps that a horizontal well and vertical wells in a vertical and horizontal combined well pattern are preheated, the vertical and horizontal combined well pattern comprises one horizontal well and a plurality of vertical wells, and the vertical wells are symmetrically distributed on the two sides of the horizontal well; judging whether preheating treatment is completed or not; and when preheating treatment is completed, steam is injected into at least part of the multiple vertical wells in turns, and SAGD oil extraction is conducted through the horizontal wells. According to the method provided by the embodiment of the invention, heat loss caused by burial depth during exploitation of the deep super heavy oil reservoir can be made up; the rising speed and overlying height of the steam cavity of an individual steam injection well point are effectively controlled, steam single-point breakthrough is prevented, and development of the steam cavity is improved; exploiting of the deep super heavy oil reservoir is achieved, and the recovery rate of the deep-layer-like oil reservoir is greatly guaranteed.

The embodiment of the invention provides a steam generation system based on solid heat storage and fused salt heating and a control method of the steam generation system, and belongs to the technical field of oil exploitation equipment. The system comprises a preheating device connected with the water supply device and used for preheating softened water; the steam generating device is connected to the outlet end of the preheating device and is used for performing multi-stage evaporation on the preheated softened water so as to obtain wet saturated steam for steam injection; wherein the steam generation device and the fused salt heat storage device are correspondingly arranged, and the steam generation device executes heat exchange with high-temperature fused salt in the fused salt heat storage device so as to obtain wet saturated steam used for steam injection; and the control device is used for generating a linkage control scheme of the water supply device, the preheating device and the steam generation device based on the real-time steam injection requirement. According to the scheme, the problems of slow starting response and poor linkage in the prior art are solved, and the operation efficiency and energy efficiency of the steam generation system are remarkably improved.

The invention provides an underground gas-steam generator for heavy oil thermal recovery and a medium flow calculation method.The generator comprises a combustion system and a water vapor system and mainly comprises a gas inlet device, a mixer, an ignition device, a combustion chamber, a vaporizing chamber, a cooling device, a mixed gas outlet and the like. The gas-steam generator is arranged underground, water is directly sprayed into smoke generated by combustion of fuel and a combustion improver through a ground pipeline at the well bottom, the fuel and the combustion improver are input underground through the ground pipeline, and smoke exhaust heat loss and transmission heat loss generated in the steam injection process of a conventional ground boiler are eliminated; the ceramic layer with the heat insulation effect is arranged on the outer wall face of the combustion chamber, cooling water enters from the rear end of the combustion chamber, a cooling water film is formed on the outer wall face of the ceramic layer and used for cooling the combustion chamber of the gas-steam generator, and safe operation of the gas-steam generator is guaranteed.

The invention provides a steam-gas mixed medium high-vacuum low-energy-consumption intelligent control system and a control method. Comprising a vapor phase precondenser, a vapor phase precondenser steam extraction opening pressure sensor, a vapor phase precondenser cooling water inlet control valve, a vapor phase precondenser cooling water inlet pressure sensor, a multi-channel efficient steam jet vacuum pump, a multi-channel efficient steam jet vacuum pump steam extraction opening pressure sensor and a multi-channel efficient steam jet vacuum pump injection steam inlet control valve. The system comprises a multi-channel efficient steam jet vacuum pump, a steam jet pressure sensor, a steam phase final cooler, a steam phase final cooler pressure sensor, a steam phase final cooler cooling water inlet control valve, a steam phase final cooler water inlet pressure sensor, a low-power-consumption auxiliary pump, a low-power-consumption auxiliary pump extraction opening control valve and a system controller. The system is designed according to the vacuum suction characteristic of a steam-gas mixed medium, the vacuum degree of the system can be remarkably improved, the energy consumption can be remarkably reduced, and therefore the heat energy utilization efficiency and the self-control capacity of a front-end system can be remarkably improved, the production efficiency is improved, the yield is increased, the efficiency is improved, and remarkable economic benefits are created.

The invention relates to the technical field of heavy oil field oil extraction processes, in particular to a multi-layer and casing leakage heavy oil well steam injection tubular column and a huff and puff yield increasing method. A steam injection huff-puff process technology is implemented on a gasoline injection layer of a multi-layer heavy oil well and a gasoline injection layer of a casing leakage heavy oil well by designing a multi-layer and casing leakage heavy oil well steam injection tubular column and applying the multi-layer and casing leakage heavy oil well steam injection tubular column. The method is applied to oil field heavy oil well exploitation, huff and puff steam injection is achieved through clamping and sealing of the high-temperature packer, the input cost is low, the potential layer reserve utilization degree can be greatly improved, normal steam injection of a multi-layer and casing leakage heavy oil well is guaranteed, the contradiction between layers and the plane contradiction of the heavy oil well are solved, the crude oil yield is increased, and the crude oil recovery rate of a heavy oil block is increased.

The invention discloses a steam injection well underground heating and testing integrated device, a plurality of heating pipes are arranged in the device in the radial direction, each heating pipe comprises a wire section and a resistance section, and the wire section is used for transmitting electric energy and comprises a high-temperature wire and a mineral insulating material which are located in a first protection pipe; the resistance section is a heating section and comprises a high-temperature resistance wire and a mineral insulating material which are positioned in a first protection tube; the high-temperature wire and the high-temperature resistance wire are connected through a connector; ground steam does not need to be injected into a well from a steam injection pipe column, but directly enters an inner channel of the device through an injection port in the ground end, when the steam flows through a heating section, the injected steam is continuously heated along the way, and after the steam dryness is improved, the steam is directly injected into a stratum; meanwhile, by monitoring underground temperature and pressure changes, the working state of the heating section can be reasonably adjusted, the optimal steam heating effect is achieved, the electric heating efficiency can be maximized, and the development problems of medium-deep SAGD, steam drive and steam huff and puff wells are effectively solved.

The present invention provides a water-vapor heat exchange system, a movable steam injection boiler and a steam injection method thereof, which include a water heat exchanger located between a water pump and the convection section of the boiler, a flue gas heat exchanger located in the convection section of the boiler, and a radiation section heat exchanger located in the radiation section of the boiler. The water heat exchanger includes an inner heat exchanger tube and an outer heat exchanger tube that exchange heat with each other and are respectively used for the circulation of water medium. The inner heat exchanger tube, the flue gas heat exchanger, the outer heat exchanger tube and the radiation section heat exchanger are sequentially connected along the direction of water medium circulation. After the water medium absorbs heat in the convection section, it enters the water heat exchanger as a heat source to heat the water medium that has not entered the convection section, so that its temperature rises and exceeds the dew point temperature, so as to avoid the low-temperature corrosion of the finned tube by the flue gas. A superheat section is connected at the flue gas outlet of the radiation section, and a superheat section heat exchanger for further heating and evaporating the water medium is arranged in the superheat section. The wet saturated steam coming out of the radiation section is continuously heated and evaporated through the superheat section heat exchanger, ensuring the steam injection effect on the oil well.

The utility model discloses a thermal recovery pipeline connecting device, which relates to the technical field of oil field steam injection and comprises a communicating pipe, a first connecting pipe, a second connecting pipe, a first elastic ring, a second elastic ring, a first elastic hoop and a second elastic hoop. The first end of the first connecting pipe is used for being fixedly connected and communicated with one end of the air inlet main pipe, and the first elastic hoop can clamp the second end of the first connecting pipe, the first elastic ring and the first end of the communicating pipe; the first end of the second connecting pipe is used for being fixedly connected and communicated with one end of the main exhaust pipe, and the second elastic hoop can clamp the second end of the second connecting pipe, the second elastic ring and the second end of the communicating pipe; a series of problems caused by length expansion and contraction due to temperature change of the pipeline can be eliminated, and the service life of the thermal recovery pipeline is prolonged.

The invention provides a method for improving the recovery ratio in the middle and later periods of SAGD (Steam Assisted Gravity Drainage) of a heterogeneous super heavy oil reservoir and an injection-production well pattern. The method comprises the steps that steam is injected after circulating preheating is conducted on an SAGD well pair, and after huff-puff preheating and electric heating preheating are conducted on an electric heating horizontal well, long-pipe steam injection and short-pipe oil extraction are conducted; when the recovery degree is 30-35%, a catalytic modifier is injected into the electrically-heated catalytic modification branch well, non-condensate gas is injected into the injection well of the SAGD well pair in an accompanying mode, the injection amount of the non-condensate gas is increased while the steam injection amount is gradually reduced according to a set proportion, and the injection amount of the non-condensate gas is increased while the steam injection amount is gradually reduced according to the set proportion; the ground volume ratio of the injection amount of the steam to the injection amount of the non-condensate gas reaches a preset ratio; the electric heating horizontal well is converted into continuous oil extraction, and electric heating auxiliary production is carried out; when the recovery degree is 55-60%, reducing the water equivalent steam with the preset mass, and additionally injecting non-condensate gas until gas drive is converted; and in the gas injection oil extraction production stage, non-condensate gas is continuously injected till the yield reduction value of the SAGD well pair is the lowest yield threshold value.

The invention relates to a boiler operation parameter optimization method and system for multi-fuel combustion of multiple solid wastes, and the method comprises the following steps: (1) multi-source data collection: obtaining the heat value, the water content, the chlorine-sulfur ratio and the heavy metal content of the solid wastes in real time through a spectrum analyzer, a visual recognition system and an online sensor; (2) intelligent compatibility optimization: calculating a solid waste mixing ratio by adopting a genetic algorithm based on calorific value balance and pollutant inhibition targets, and controlling a Cl / S molar ratio to be 1.2-1.8 and the alkali metal content to be 1t; 50%; (3) pretreatment and drying: the water content gt; and carrying out microwave-steam combined drying on 25% of solid waste, and dynamically adjusting microwave power, steam injection time and the like. The method has the advantages that through the technical integration of multi-source data fusion, intelligent algorithm optimization and digital twinborn verification, a solid waste co-combustion full-process optimization system is constructed, and ultralow emission of pollutants and safe and economical operation are achieved while the energy utilization rate is increased.

The invention discloses a multiphase flow steam injection simulation experiment device for a long horizontal well, which relates to the technical field of horizontal well exploitation and comprises N sections of reservoir box bodies arranged in sequence, horizontal steam injection pipe simulation devices arranged in the N sections of reservoir box bodies, and a steam injection simulation system communicated with the first section of horizontal steam injection pipe simulation device, the transparent visual observation section is arranged on a pipeline at an outlet of the horizontal steam injection pipe simulation device, the high-speed camera shooting system is used for shooting fluid in the transparent visual observation section at a high speed, and the control terminal is used for performing flow pattern analysis on information acquired by the high-speed camera shooting system. According to the method, the N sections of mutually independent reservoir box structures are adopted, differential geological parameters can be synchronously loaded to the boxes, the influences of different reservoir physical properties on the development effect can be synchronously compared, and the optimal mining scheme can be rapidly screened through parameter combination optimization. And a key theoretical basis and an engineering verification means are provided for refined regulation and control of a heavy oil thermal recovery process through flow pattern analysis.