Gas-fired multi-component thermal fluid thermal recovery apparatus for oilfield

Abstract

The present invention relates to the field of oilfield thermal recovery, and provides a gas-fired multi-component thermal fluid thermal recovery apparatus for an oilfield. The apparatus comprises an ignition assembly, a gas inlet assembly, a water inlet assembly, and a preheating assembly. The ignition assembly comprises a combustion cylinder, a mounting housing and an injection pipe which are fixed as one piece, wherein an igniter and a gas nozzle are fixedly mounted at a rear portion of the combustion cylinder, and the gas nozzle allows for the creation of a mixture of gas and air with a circular motion trajectory. The water inlet assembly comprises a water inlet plate fixedly mounted on the combustion cylinder, wherein the water inlet plate is fixedly connected to a water-containing housing, a plurality of water nozzles are mounted on the water-containing housing, and the water nozzles allow for the creation of water mist in a direction opposite the direction in which the gas nozzle sprays the gas. By means of providing the ignition assembly and the water inlet assembly, water vapor and the mixture of air and gas in opposite rotation directions can impinge against each other, thereby achieving a good mixing effect and ensuring the uniformity of the multi-component thermal fluid.

Description

A gas-fired multi-element thermal fluid oilfield thermal recovery device Technical Field

[0001] This invention relates to the field of oilfield thermal recovery technology, specifically to a gas-fired multi-element thermal fluid oilfield thermal recovery device. Background Technology

[0002] Thermal recovery of oilfields is an extraction technology used to increase the production of heavy oil or high-viscosity crude oil. Also known as thermal oil recovery, it reduces the viscosity of crude oil and increases its fluidity by injecting hot fluids (such as steam) into the reservoir or by causing the oil layer to burn in situ to form a moving heat flow, thereby increasing the recovery rate of crude oil.

[0003] In existing technologies, multi-component thermal fluid generators are commonly used to produce high-temperature, high-pressure multi-component mixed thermal fluids. Injecting these multi-component mixed thermal fluids into the oil reservoir can increase the recovery rate of crude oil. These multi-component mixed thermal fluids typically include natural gas, water, and air. When a commonly used multi-component thermal fluid generator is working, it first ignites and burns a mixture of natural gas and air to produce a high-temperature, high-pressure mixture. The high temperature is then used to vaporize water into steam, which is then mixed. However, the water vapor is not mixed sufficiently with the natural gas and air, affecting the uniformity of the multi-component thermal fluid. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a gas-fired multi-element thermal fluid oilfield thermal recovery device, which solves the problem of insufficient mixing of water gas with natural gas and air, affecting the uniformity of the multi-element thermal fluid.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a gas-fired multi-element thermal fluid oilfield thermal recovery device, comprising:

[0008] The ignition assembly includes a combustion cylinder, a mounting shell, and an injection pipe, all fixed together. An igniter and a gas nozzle are fixedly installed at the rear of the combustion cylinder. The gas nozzle can generate a mixture of combustion gas and air with a circular motion trajectory.

[0009] An intake assembly, which is detachably installed in a mounting housing, is used to introduce a high-pressure mixture of fuel gas and air.

[0010] The water inlet assembly includes a water inlet plate fixedly installed on the combustion cylinder, a water-holding shell fixedly connected to the water inlet plate, and multiple water nozzles installed on the water-holding shell. The water nozzles can produce water mist in the opposite direction to the gas ejected by the gas nozzles.

[0011] A preheating component, installed within a water-containing shell, includes a heating element for heating the water flow and a filtering component for filtering the water flow. The ignition component and water inlet component counteract the opposing rotation of the water vapor and air / gas mixture, achieving a good mixing effect and ensuring the uniformity of the multi-component thermal fluid. Furthermore, the heat generated by the ignition of air and gas can be used to heat the water flow, providing thorough preheating, shortening the water's vaporization time, and improving mixing efficiency. The air inlet component mixes and filters air and gas, preventing gas nozzle blockage and ensuring smooth ignition. The preheating component preheats the water flow, working in conjunction with the heat from gas ignition to further shorten the water preheating time.

[0012] Preferably, the mounting housing is located outside the combustion cylinder, the injection pipe is located at the front of the mounting housing, the mounting housing has a mounting cavity, the injection pipe is interconnected with the combustion cylinder, the inner wall of the combustion cylinder has a guiding spiral groove, and the gas nozzle is interconnected with the mounting cavity. The guiding spiral groove is used to guide the airflow, forming a spiral airflow trajectory, utilizing the expansion of the mixed gas and the airflow direction to provide a certain airflow velocity, facilitating subsequent mixing with water and air.

[0013] Preferably, the air intake assembly includes a mounting flange detachably mounted on the mounting housing. A filter screen is fixedly connected to the mounting flange. A gas inlet pipe and an air inlet pipe are mounted on the end face of the mounting flange. Both the gas inlet pipe and the air inlet pipe have horizontally oriented air outlets at their ends that extend into the filter screen. External high-pressure air enters the filter screen through the air inlet pipe, and external high-pressure gas enters the filter screen through the gas inlet pipe. The air and gas are discharged in the same direction from the horizontally oriented air outlets, and they will initially mix by opposing each other.

[0014] Preferably, a heat-conducting component is fixedly installed on the water-containing shell, and a dispersing component for dispersing water flow is concentrically arranged inside the water-containing shell. The dispersing component includes a dispersing rod fixedly installed inside the water-containing shell, and dispersing shells are uniformly fixedly connected to the dispersing rod. A dispersing tip is fixedly connected to the water inlet end of the dispersing rod. The dispersing tip is used to reduce the resistance to the inflow of water, and the dispersing shells are used to disperse the water flow, so that the water flow is in uniform contact with the heating element.

[0015] Preferably, the heating element includes a preheating mounting plate detachably mounted on the water inlet plate, and an electric heating element is fixedly mounted on the side of the preheating mounting plate near the water-containing shell. The electric heating element is used to preheat the hot water flow.

[0016] Preferably, the filter component includes a filter housing fixedly installed at the center of the preheating mounting plate on the side away from the water-containing shell. A filter element is placed inside the filter housing. A disassembly cover is threadedly connected to the end of the filter housing away from the preheating mounting plate, and a water inlet pipe is fixedly connected to the disassembly cover. The disassembly cover can be unscrewed from the filter housing for easy replacement of the filter element and convenient maintenance.

[0017] Preferably, there are at least two heating elements, which are evenly arranged in a circular pattern and located outside the distribution element. This provides multiple heating positions.

[0018] Preferably, the dispersion shell is hemispherical, and the heat-conducting element has an air-receiving notch. The heat-conducting element and the water nozzle are staggered. The air-receiving notch is used for airflow, reducing the influence of the heat-conducting element on the airflow.

[0019] (III) Beneficial Effects

[0020] This invention provides a gas-fired multi-element thermal fluid oilfield thermal recovery device. It has the following beneficial effects:

[0021] 1. The present invention, through the setting of the ignition component and the water inlet component, can counteract the water vapor and air and gas mixture with opposite rotation, forming a good mixing effect, ensuring the uniformity of the multi-element heat fluid, and can use the heat generated by the ignition of air and gas to heat the water flow, playing a role in sufficient preheating, shortening the time for the water flow to be heated and vaporized, and improving the mixing efficiency.

[0022] 2. The present invention, through the air intake component, can mix and filter air and gas, avoid clogging of the gas nozzle, and ensure smooth ignition.

[0023] 3. The preheating component can preheat the water flow, which works in conjunction with the heat from the gas ignition to further shorten the water flow preheating time. Attached Figure Description

[0024] Figure 1 is an overall perspective view of the present invention;

[0025] Figure 2 is an overall exploded view of the present invention;

[0026] Figure 3 is a perspective view of the ignition assembly of the present invention;

[0027] Figure 4 is a perspective view of the air intake assembly of the present invention;

[0028] Figure 5 is a structural schematic diagram of the horizontal air outlet portion of the present invention;

[0029] Figure 6 is a perspective view of the water inlet assembly of the present invention;

[0030] Figure 7 is a perspective view of the dispersion component of the present invention;

[0031] Figure 8 is a perspective view of the heat-conducting component of the present invention;

[0032] Figure 9 is a perspective view of the preheating component of the present invention;

[0033] Figure 10 is a cross-sectional view of the entire invention.

[0034] The components include: 1. Ignition assembly; 2. Air intake assembly; 3. Water intake assembly; 4. Preheating assembly; 101. Combustion cylinder; 102. Injection pipe; 103. Mounting housing; 104. Mounting cavity; 105. Igniter; 106. Gas nozzle; 107. Guide spiral groove; 201. Mounting flange; 202. Filter screen; 203. Air inlet pipe; 204. Gas inlet pipe; 205. Horizontal air outlet; 301. Water inlet plate; 302. Water-filled housing; 303. Heat-conducting component; 3031. Air vent; 304. Water nozzle; 305. Dispersing component; 3051. Dispersing rod; 3052. Dispersing shell; 3053. Dispersing tip; 401. Heating element; 402. Preheating mounting plate; 403. Filter housing; 404. Filter component; 405. Water inlet pipe; 406. Removal cover. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] As shown in Figures 1-10, embodiments of the present invention provide a gas-fired multi-element thermal fluid oilfield thermal recovery device, comprising:

[0037] Ignition assembly 1 includes a combustion cylinder 101 fixed as one piece, a mounting housing 103, and an injection pipe 102. An igniter 105 and a gas nozzle 106 are fixedly mounted on the rear of the combustion cylinder 101. The gas nozzle 106 can generate a mixture of gas and air with a circular motion trajectory. The mounting housing 103 is located outside the combustion cylinder 101, and the injection pipe 102 is located at the front of the mounting housing 103. The mounting housing 103 has a mounting cavity 104 inside. The injection pipe 102 is interconnected with the combustion cylinder 101. The inner wall of the combustion cylinder 101 has a guide spiral groove 107. The gas nozzle 106 is interconnected with the mounting cavity 104.

[0038] Referring to Figure 3, the gas nozzle 106 generates a mixture of gas and air with a circular motion trajectory, which is ignited by the igniter 105. Then, the high-temperature and high-pressure gas forms a spiral airflow trajectory under the guidance of the guide spiral groove 107. The expansion of the mixed gas and the airflow direction provide a certain airflow velocity, which facilitates subsequent mixing with water and gas. The mounting shell 103 can improve the heat preservation performance of the combustion cylinder 101 and use the combustion heat of the mixed gas in the combustion cylinder 101 to preheat the incoming air and gas, which facilitates the ignition of the mixed gas.

[0039] The intake assembly 2 is detachably installed in the mounting housing 103. The intake assembly 2 is used to introduce a high-pressure mixture of gas and air. The intake assembly 2 includes a mounting flange 201 detachably installed on the mounting housing 103. A filter screen 202 is fixedly connected to the mounting flange 201. A gas inlet pipe 204 and an air inlet pipe 203 are installed on the end face of the mounting flange 201. The ends of the gas inlet pipe 204 and the air inlet pipe 203 that extend into the filter screen 202 are both provided with horizontal air outlets 205 in the same direction.

[0040] Referring to Figures 4 and 5, external high-pressure air enters the filter housing 202 through the air inlet pipe 203, and external high-pressure gas enters the filter housing 202 through the gas inlet pipe 204. The air and gas are discharged in the same direction from the horizontal outlet 205. The airflow from the upper horizontal outlet 205 flows towards the air inlet pipe 203, and the airflow from the lower horizontal outlet 205 flows towards the gas inlet pipe 204. The air and gas will collide with each other and undergo preliminary mixing before being sprayed out by the gas nozzle 106, which facilitates subsequent ignition. The filter housing 202 provides gas filtration and can also absorb heat from the housing 103, improving the utilization rate of the heat from the combustion of the mixed gas inside the combustion cylinder 101.

[0041] The water inlet assembly 3 includes a water inlet plate 301 fixedly installed on the combustion cylinder 101. A water-holding shell 302 is fixedly connected to the water inlet plate 301. Multiple water nozzles 304 are installed on the water-holding shell 302. The water nozzles 304 can generate water mist in the opposite direction to the gas ejected by the gas nozzles 106. A heat-conducting component 303 is fixedly installed on the water-holding shell 302. The heat-conducting component 303 and the water nozzles 304 are arranged alternately. A dispersing component 305 for dispersing water flow is concentrically provided inside the water-holding shell 302. The dispersing component 305 includes a dispersing rod 3051 fixedly installed inside the water-holding shell 302. A dispersing shell 3052 is uniformly fixedly connected to the dispersing rod 3051. The dispersing shell 3052 is hemispherical. An air-passing notch 3031 is provided on the heat-conducting component 303. A dispersing tip 3053 is fixedly connected to the water inlet end of the dispersing rod 3051.

[0042] Referring to Figures 6, 7, and 8, the water-holding shell 302 is used to hold the incoming high-pressure water flow, and the water nozzle 304 is used to spray the water flow. After the water flow is atomized, it sprays the gas in the opposite direction to the gas sprayed by the gas nozzle 106, which can make the water flow mix with the air and gas mixture to form a stable and uniform multi-element heat fluid. The dispersing tip 3053 is used to reduce the resistance of the water flow, the dispersing shell 3052 is used to disperse the water flow so that the water flow is in uniform contact with the heating element 401, and the heat-conducting element 303 is used to absorb part of the high temperature of the air and gas mixture combustion and transfer the heat to the water-holding shell 302 for preheating the water flow to facilitate subsequent water atomization. The air gap 3031 is used for airflow.

[0043] When water flows in, the dispersing tip 3053 first disperses the water flow, making it in an umbrella-shaped dispersion state. Then, when it encounters the dispersing shell 3052, since the dispersing shell 3052 is hemispherical, the water flow on its surface is further dispersed into an umbrella shape with a larger radius, ensuring that the water flow can be fully dispersed. Compared with the undispersed water flow, the contact area between the water flow and the heating tube 401 is increased, the contact is more thorough, the water flow is preheated more quickly, and the preheating efficiency is higher, so that the multi-element heat fluid can be formed more quickly. The heat-conducting element 303 can absorb and transfer heat without affecting the airflow, accelerating the vaporization of water mist.

[0044] The preheating component 4 is installed inside the water-containing shell 302 and includes a heating element for heating the water flow and a filtering component for filtering the water flow. The heating element includes a preheating mounting plate 402 that is detachably installed on the water inlet plate 301. An electric heating tube 401 is fixedly installed on the side of the preheating mounting plate 402 near the water-containing shell 302. There are at least two electric heating tubes 401, which are evenly arranged in a circle. The electric heating tubes 401 are located outside the dispersing component 305. The filtering component includes a filter shell 403 that is fixedly installed at the center of the side of the preheating mounting plate 402 away from the water-containing shell 302. A filter element 404 is placed inside the filter shell 403. A disassembly cover 406 is threadedly connected to the end of the filter shell 403 away from the preheating mounting plate 402. A water inlet pipe 405 is fixedly connected to the disassembly cover 406.

[0045] Referring to Figures 9 and 10, the inlet pipe 405 is used for high-pressure water to enter. The high-pressure water is first filtered by the filter element 404 and then enters the water holding shell 302. The filter element 404 can be made of fiber filter media. The electric heating tube 401 is used to heat the water flow. The disassembly cover 406 can be removed from the filter shell 403 to facilitate the replacement of the filter element 404 and facilitate future maintenance.

[0046] Working Principle: External high-pressure air enters the filter housing 202 through the air inlet pipe 203, and external high-pressure fuel enters the filter housing 202 through the fuel inlet pipe 204. Air and fuel are discharged in the same direction from the horizontal outlet 205, where they initially mix by opposing forces before being ejected by the gas nozzle 106 for subsequent ignition. The filter housing 202 provides gas filtration and absorbs heat from the mounting housing 103, improving the utilization rate of the combustion heat of the mixed gas inside the combustion chamber 101. The gas nozzle 106 generates a circular motion trajectory of the fuel-air mixture, which is ignited by the igniter 105. The high-temperature, high-pressure gas, guided by the spiral groove 107, forms a spiral airflow trajectory. The expansion of the mixed gas and the airflow direction provide a certain airflow velocity, facilitating subsequent mixing with water. The mounting housing 103 improves the insulation performance of the combustion chamber 101 and utilizes the combustion heat of the mixed gas inside the combustion chamber 101 to heat the incoming air and fuel. Preheating facilitates the ignition of the mixed gas; the water inlet pipe 405 allows high-pressure water to enter, which is first filtered by the filter element 404 before entering the water-holding housing 302. The filter element 404 can be made of fiber filter media. The electric heating element 401 is used to heat the water flow, and the disassembly cover 406 can be removed from the filter housing 403 for easy replacement of the filter element 404 and convenient maintenance. The water-holding housing 302 holds the incoming high-pressure water flow, and the water nozzle 304 sprays the water flow. After being atomized, the water flow mixes with the gas nozzle 106. The opposite gas flow direction allows the water flow to collide and mix with the air and gas mixture, forming a stable and uniform multi-element thermal fluid. The dispersion tip 3053 is used to reduce the resistance of the water flow, the dispersion shell 3052 is used to disperse the water flow, so that the water flow is in uniform contact with the heating element 401, the heat-conducting element 303 is used to absorb part of the high temperature of the air and gas mixture combustion and transfer the heat to the water-containing shell 302 for preheating the water flow, which facilitates the subsequent water mist vaporization, and the air gap 3031 is used for airflow.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas-fired multi-element thermal fluid oilfield thermal recovery device, characterized in that, include: Ignition assembly (1), the ignition assembly (1) includes a combustion cylinder (101) fixed as one piece, a mounting shell (103) and an injection pipe (102), an igniter (105) and a gas nozzle (106) fixedly installed at the rear of the combustion cylinder (101), the gas nozzle (106) can generate a mixture of gas and air with a circular motion trajectory; An intake assembly (2) is detachably installed in a mounting housing (103) and is used to introduce a high-pressure mixture of fuel gas and air. The water inlet assembly (3) includes a water inlet plate (301) fixedly installed on the combustion cylinder (101), a water holding shell (302) fixedly connected to the water inlet plate (301), and a plurality of water nozzles (304) installed on the water holding shell (302). The water nozzles (304) can generate water mist in the opposite direction to the gas ejected by the gas nozzles (106). A preheating component (4) is installed inside a water-containing shell (302), which includes a heating element for heating the water flow and a filtering component for filtering the water flow.

2. The gas-fired multi-element thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The mounting housing (103) is located outside the combustion cylinder (101), the injection pipe (102) is located at the front of the mounting housing (103), the mounting housing (103) is provided with a mounting cavity (104), the injection pipe (102) is connected to the combustion cylinder (101), the inner wall of the combustion cylinder (101) is provided with a guide spiral groove (107), and the gas nozzle (106) is connected to the mounting cavity (104).

3. The gas-fired multi-element thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The air intake assembly (2) includes a mounting flange (201) detachably mounted on the mounting housing (103). A filter screen (202) is fixedly connected to the mounting flange (201). A gas inlet pipe (204) and an air inlet pipe (203) are mounted on the end face of the mounting flange (201). The ends of the gas inlet pipe (204) and the air inlet pipe (203) that extend into the filter screen (202) are each provided with horizontal air outlets (205) in the same direction.

4. The gas-fired multi-element thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: A heat-conducting component (303) is fixedly installed on the water-containing shell (302). A dispersing component (305) for dispersing water flow is concentrically arranged inside the water-containing shell (302). The dispersing component (305) includes a dispersing rod (3051) fixedly installed inside the water-containing shell (302). A dispersing shell (3052) is uniformly fixedly connected to the dispersing rod (3051). A dispersing tip (3053) is fixedly connected to the water inlet end of the dispersing rod (3051).

5. A gas-fired multi-element thermal fluid oilfield thermal recovery device according to claim 1, characterized in that: The heating element includes a preheating mounting plate (402) that is detachably mounted on the water inlet plate (301), and an electric heating tube (401) is fixedly mounted on the side of the preheating mounting plate (402) near the water-containing shell (302).

6. A gas-fired multi-element thermal fluid oilfield thermal recovery device according to claim 5, characterized in that: The filter component includes a filter housing (403) fixedly installed on the center of the side of the preheating mounting plate (402) away from the water-containing shell (302). A filter element (404) is placed inside the filter housing (403). A disassembly cover (406) is threadedly connected to one end of the filter housing (403) away from the preheating mounting plate (402). A water inlet pipe (405) is fixedly connected to the disassembly cover (406).

7. A gas-fired multi-element thermal fluid oilfield thermal recovery device according to claim 5, characterized in that: The number of heating elements (401) is at least two, and they are evenly arranged in a circle. The heating elements (401) are located outside the dispersing member (305).

8. A gas-fired multi-element thermal fluid oilfield thermal recovery device according to claim 4, characterized in that: The dispersion shell (3052) is hemispherical in shape, and the heat-conducting component (303) is provided with an air-passing notch (3031). The heat-conducting component (303) and the water nozzle (304) are arranged alternately.

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