A gas-fired multi-component thermal fluid oilfield thermal recovery equipment

Abstract

The present invention provides a gas-fired multi-component thermal fluid oilfield thermal recovery equipment, which relates to the field of oilfield thermal recovery. It includes an ignition component, an air intake component, a water intake component, and a preheating component. The ignition component includes a combustion cylinder, a mounting shell, and an injection pipe fixed as one. An igniter and a gas nozzle are fixedly installed at the rear of the combustion cylinder. The gas nozzle can generate a mixed gas of gas and air with a circular motion trajectory. The water intake component includes a water intake plate fixedly installed on the combustion cylinder, a water storage shell is fixedly connected to the water intake plate, and a plurality of water nozzles are installed on the water storage shell. The water nozzle can generate water mist in the opposite direction to the gas sprayed by the gas nozzle. By setting the ignition component and the water intake component, the water vapor and air and gas mixture with opposite rotation directions can be offset to form a good mixing effect and ensure the uniformity of the multi-component thermal fluid.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield thermal recovery, in particular to a gas-fired multi-component thermal fluid oilfield thermal recovery equipment. Background Art

[0002] Thermal recovery in oil fields is a mining 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 improves its fluidity, thereby increasing the recovery rate of crude oil by injecting hot fluid (such as steam) into the oil reservoir or causing the oil layer to burn on site to form a mobile heat flow.

[0003] In the existing technology, a multi-component thermal fluid generator is often used to generate a high-temperature and high-pressure multi-component mixed thermal fluid. The multi-component mixed thermal fluid is injected into the oil layer to achieve the purpose of increasing the recovery rate of crude oil. Among them, the multi-component mixed thermal fluid usually includes natural gas, water, and air. When the commonly used multi-component thermal fluid generator is working, the natural gas and air mixture is first ignited and burned to generate a high-temperature and high-pressure mixture, and the high temperature is used to vaporize the water into water vapor, and then the mixture is mixed. However, the water vapor is not mixed sufficiently with the natural gas and air, which affects the uniformity of the multi-component thermal fluid. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a gas-fired multi-component thermal fluid oilfield thermal recovery equipment, which solves the problem that water vapor is not sufficiently mixed with natural gas and air, affecting the uniformity of the multi-component thermal fluid.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A gas-fired multi-component thermal fluid oilfield thermal recovery equipment, comprising:

[0008] An ignition assembly, the ignition assembly comprising a combustion cylinder, a mounting shell, and an injection pipe fixed as one, an igniter and a gas nozzle fixedly mounted at the rear of the combustion cylinder, and the gas nozzle can generate a mixed gas of fuel gas and air in a circular motion trajectory;

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

[0010] A water inlet assembly, the water inlet assembly comprising a water inlet plate fixedly mounted on the combustion cylinder, a water container shell fixedly connected to the water inlet plate, a plurality of water nozzles mounted on the water container shell, the water nozzles being capable of generating water mist in a direction opposite to that of the gas nozzles;

[0011] A preheating component is installed in a water-containing shell, and includes a heating element for heating the water flow and a filtering element for filtering the water flow. Through the ignition component and water inlet component, water vapor and air-gas mixture with opposite rotation directions can be offset to form a good mixing effect, ensuring the uniformity of the multi-component thermal fluid, and the heat generated by the ignition of air and gas can be used to heat the water flow, which plays a role of full preheating, shortens the time for the water flow to be heated and vaporized, and improves the mixing efficiency; through the air inlet component, the air and gas can be mixed and filtered to avoid the gas nozzle from being blocked and ensure smooth ignition; the preheating component can preheat the water flow, cooperate with the heat generated by the ignition of the gas, and further shorten the preheating time of the water flow.

[0012] Preferably, the installation shell is located outside the combustion cylinder, the injection pipe is located at the front of the installation shell, a mounting cavity is provided in the installation shell, the injection pipe is communicated with the combustion cylinder, a guide spiral groove is provided on the inner wall of the combustion cylinder, and the gas nozzle is communicated with the installation cavity. The guide spiral groove is used to guide the airflow to form a spiral airflow motion trajectory, and a certain airflow velocity is provided by utilizing the expansion of the mixed gas and the airflow direction to facilitate subsequent mixing with water vapor.

[0013] Preferably, the air intake assembly includes a mounting flange that can be detachably mounted on the mounting shell, a filter housing is fixedly connected to the mounting flange, a gas inlet pipe and an air inlet pipe are mounted on the end surface of the mounting flange, and the ends of the gas inlet pipe and the air inlet pipe extending into the filter housing are both provided with horizontal air outlets in the same direction. External high-pressure air enters the filter housing from the air inlet pipe, and external high-pressure gas enters the filter housing from the gas inlet pipe. The air and gas are discharged in the same direction from the horizontal air outlet, and the air and gas will collide with each other for preliminary mixing.

[0014] Preferably, a heat conducting member is fixedly mounted on the water housing, a dispersing member for dispersing water flow is concentrically arranged in the water housing, the dispersing member comprises a dispersing rod fixedly mounted in the water housing, a dispersing shell is evenly fixedly connected to the dispersing rod, and a dispersing tip is fixedly connected to the water inlet end of the dispersing rod. The dispersing tip is used to reduce the resistance of the water flow inflow, and the dispersing shell is used to disperse the water flow so that the water flow contacts the electric heating pipe evenly.

[0015] Preferably, the heating element comprises a preheating mounting plate detachably mounted on the water inlet plate, and an electric heating pipe is fixedly mounted on one side of the preheating mounting plate close to the water housing. The electric heating pipe is used to preheat the water flow.

[0016] Preferably, the filter component comprises a filter housing fixedly mounted on the center of one side of the preheating mounting plate away from the water housing, a filter element is placed in the filter housing, a disassembly cover is threadedly connected to one 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, which is convenient for replacing the filter element and facilitating later maintenance and use.

[0017] Preferably, there are at least two electric heating tubes, which are evenly arranged in a circle, and the electric heating tubes are located outside the dispersion member to provide multiple heating positions.

[0018] Preferably, the dispersion shell is in the shape of a hemispherical shell, the heat conducting member is provided with an air-letting notch, and the heat conducting member and the water body nozzle are arranged alternately. The air-letting notch is used for air flow, reducing the influence of the heat conducting member on the air flow movement.

[0019] (III) Beneficial effects

[0020] The present invention provides a gas-fired multi-element thermal fluid oilfield thermal recovery equipment, which has the following beneficial effects:

[0021] 1. The present invention, through the ignition assembly and water inlet assembly, can offset the water vapor and air and gas mixture with opposite rotation directions to form a good mixing effect, ensure the uniformity of the multi-component thermal fluid, and use the heat generated by the ignition of air and gas to heat the water flow, play a role of sufficient preheating, shorten the time for the water flow to be heated and vaporized, and improve the mixing efficiency.

[0022] 2. The present invention can mix and filter air and fuel gas through the air intake assembly, thereby avoiding the gas nozzle from being blocked and ensuring smooth ignition.

[0023] 3. The water flow can be preheated by setting up the preheating component, which cooperates with the heat generated by the ignition of the gas to further shorten the preheating time of the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall stereogram of the present invention;

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

[0026] Figure 3 A perspective view of an ignition assembly of the present invention;

[0027] Figure 4 is a three-dimensional diagram of an air intake assembly of the present invention;

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

[0029] Figure 6 is a three-dimensional diagram of the water inlet assembly of the present invention;

[0030] Figure 7 A three-dimensional diagram of a dispersing member of the present invention;

[0031] Figure 8 is a three-dimensional diagram of the heat conducting member of the present invention;

[0032] Fig. 9 is a three-dimensional diagram of a preheating assembly of the present invention;

[0033] Fig.10 It is a cross-sectional view of the whole of the present invention.

[0034] Among them, 1. ignition component; 2. air intake component; 3. water intake component; 4. preheating component; 101. combustion cylinder; 102. injection pipe; 103. installation shell; 104. installation cavity; 105. igniter; 106. gas nozzle; 107. guide spiral groove; 201. installation flange; 202. filter mesh shell; 203. air inlet pipe; 204. gas inlet pipe; 205. horizontal air outlet; 301. water inlet plate; 302. water housing; 303. heat conducting part; 3031. air gap; 304. water nozzle; 305. dispersion part; 3051. dispersion rod; 3052. dispersion shell; 3053. dispersion tip; 401. electric heating tube; 402. preheating installation plate; 403. filter shell; 404. filter part; 405. water inlet pipe; 406. disassembly cover. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides a gas-fired multi-component thermal fluid oilfield thermal recovery equipment, comprising:

[0037] An ignition assembly 1, the ignition assembly 1 comprises a combustion cylinder 101, a mounting shell 103, and an injection pipe 102 fixed as one body, an igniter 105 and a gas nozzle 106 are fixedly mounted at the rear of the combustion cylinder 101, the gas nozzle 106 can generate a mixture of fuel gas and air in a circular motion trajectory, the mounting shell 103 is located outside the combustion cylinder 101, the injection pipe 102 is located at the front of the mounting shell 103, a mounting cavity 104 is arranged in the mounting shell 103, the injection pipe 102 is communicated with the combustion cylinder 101, a guiding spiral groove 107 is arranged on the inner wall of the combustion cylinder 101, and the gas nozzle 106 is communicated with the mounting cavity 104;

[0038] refer to Figure 3 The gas nozzle 106 produces a mixed gas of fuel gas and air in a circular motion trajectory, which is ignited by the igniter 105. Then, the high-temperature and high-pressure gas forms a spiral airflow motion 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 to facilitate subsequent mixing with water vapor. The installation of the shell 103 can improve the thermal insulation 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 fuel gas, thereby facilitating the ignition of the mixed gas.

[0039] An air intake assembly 2, which can be detachably mounted in the mounting shell 103, and is used to introduce a high-pressure mixed gas of gas and air. The air intake assembly 2 includes a mounting flange 201 detachably mounted on the mounting shell 103, a filter screen housing 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 surface of the mounting flange 201, and one end of the gas inlet pipe 204 and the air inlet pipe 203 extending into the filter screen housing 202 are both provided with a horizontal air outlet 205 in the same direction;

[0040] refer to Figure 4 , Figure 5 , external high-pressure air enters the filter mesh shell 202 from the air inlet pipe 203, and external high-pressure gas enters the filter mesh shell 202 from the gas inlet pipe 204. The air and gas are discharged from the horizontal air outlet 205 in the same direction. The airflow of the upper horizontal air outlet 205 flows toward the side of the air inlet pipe 203, and the airflow of the lower horizontal air outlet 205 flows toward the side of the gas inlet pipe 204. The air and gas will collide with each other for preliminary mixing, and then be sprayed out by the gas nozzle 106 to facilitate subsequent ignition operations. Among them, the filter mesh shell 202 provides a gas filtering function, and can also absorb the heat in the installation shell 103, thereby improving the utilization rate of the heat of the combustion of the mixed gas inside the combustion cylinder 101.

[0041] The water inlet assembly 3 comprises a water inlet plate 301 fixedly mounted on the combustion cylinder 101, a water housing 302 fixedly connected to the water inlet plate 301, a plurality of water nozzles 304 mounted on the water housing 302, the water nozzles 304 can generate water mist in the opposite direction of the gas ejected from the gas nozzle 106, a heat conducting member 303 fixedly mounted on the water housing 302, the heat conducting member 303 and the water nozzles 304 are staggered, a dispersing member 305 for dispersing water flow is concentrically arranged in the water housing 302, the dispersing member 305 comprises a dispersing rod 3051 fixedly mounted in the water housing 302, a dispersing shell 3052 is evenly fixedly connected to the dispersing rod 3051, the dispersing shell 3052 is in the shape of a hemispherical shell, a wind-allowing notch 3031 is arranged on the heat conducting member 303, and a dispersing tip 3053 is fixedly connected to the water inlet end of the dispersing rod 3051;

[0042] refer to Figure 6 , Figure 7 , Figure 8 The water-containing shell 302 is used to contain the incoming high-pressure water flow, and the water body nozzle 304 is used to spray the water flow. After the water flow is atomized, it is opposite to the direction of the gas sprayed by the gas nozzle 106, so that the water flow and the air and gas mixture gas can be counter-mixed to form a stable and uniform multi-component thermal fluid, wherein the dispersion tip 3053 is used to reduce the resistance of the water flow inflow, the dispersion shell 3052 is used to disperse the water flow so that the water flow is in uniform contact with the electric heating tube 401, and the heat conductive member 303 is used to absorb a part of the high temperature of the combustion of the air and gas mixture, and transfer the heat to the water-containing shell 302, which is used to preheat the water flow, facilitate the subsequent water mist vaporization, and allow the wind gap 3031 to be used for the flow of air flow;

[0043] When water flows in, the dispersion tip 3053 first disperses the water flow, making the water flow in an umbrella-shaped dispersion state, and then encounters the dispersion shell 3052. Since the dispersion shell 3052 is in the shape of a hemispherical shell, the water flow on its surface is further dispersed and becomes an umbrella-shaped 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 electric heating tube 401 is increased, the contact is more thorough, the water flow is preheated more quickly, and the preheating efficiency is higher, thereby being able to form a multi-element thermal fluid more quickly; the heat conductor 303 can absorb and transfer heat without affecting the flow of air, thereby accelerating the vaporization of water mist.

[0044] A preheating component 4 is installed in the water holding shell 302, and includes a heating element for heating the water flow and a filtering element for filtering the water flow. The heating element includes a preheating mounting plate 402 detachably mounted on the water inlet plate 301. An electric heating tube 401 is fixedly mounted on the side of the preheating mounting plate 402 close to the water holding 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 on the outside of the dispersion element 305. The filtering element includes a filtering shell 403 fixedly mounted on the preheating mounting plate 402 at the center of a side away from the water holding shell 302. A filtering element 404 is placed in the filtering shell 403. A disassembly cover 406 is threadedly connected to one end of the filtering shell 403 away from the preheating mounting plate 402, and a water inlet pipe 405 is fixedly connected to the disassembly cover 406.

[0045] refer to Fig. 9 , Fig.10 The water 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 housing 302. The filter element 404 can be selected with fiber filter material. The electric heating tube 401 is used to heat the water flow, and the disassembly cover 406 can be removed from the filter housing 403 to facilitate the replacement of the filter element 404 and facilitate later maintenance.

[0046] Working principle: external high-pressure air enters the filter mesh shell 202 from the air inlet pipe 203, and external high-pressure gas enters the filter mesh shell 202 from the gas inlet pipe 204. The air and gas are discharged in the same direction from the horizontal air outlet 205. The air and gas will collide with each other and perform preliminary mixing, and then be sprayed out by the gas nozzle 106 to facilitate subsequent ignition operations. Among them, the filter mesh shell 202 provides a gas filtering function, and can also absorb the heat in the installation shell 103 to improve the utilization rate of the heat of the mixed gas combustion inside the combustion cylinder 101. The gas nozzle 106 produces a mixed gas of gas and air with a circular motion trajectory, which is ignited by the igniter 105, and then the high-temperature and high-pressure gas, under the guidance of the guide spiral groove 107, forms a spiral airflow motion trajectory, and utilizes the expansion of the mixed gas and the direction of the airflow to provide a certain airflow speed, which is convenient for subsequent mixing with water vapor. The installation shell 103 can improve the thermal insulation performance of the combustion cylinder 101, and utilize the combustion heat of the mixed gas in the combustion cylinder 101 to ignite the incoming air and gas. Preheating is convenient for the mixed gas to ignite the operation; the water inlet pipe 405 is used for the high-pressure water to enter, the high-pressure water is first filtered by the filter element 404, and then enters the water housing 302, the filter element 404 can be selected with fiber filter material, the electric heating pipe 401 is used to heat the water flow, and the disassembly cover 406 can be removed from the filter housing 403, which is convenient for replacing the filter element 404 and facilitating the later maintenance and use. The water housing 302 is used to hold the incoming high-pressure water flow, and the water body nozzle 304 is used to spray the water flow. After the water flow is atomized, it is sprayed with the gas nozzle 106. The gas outlet directions are opposite, so that the water flow can be counter-mixed with the air and gas mixture to form a stable and uniform multi-component thermal fluid, wherein the dispersion tip 3053 is used to reduce the resistance of the water flow inflow, the dispersion shell 3052 is used to disperse the water flow so that the water flow is in uniform contact with the electric heating tube 401, and the heat conductor 303 is used to absorb a part of the high temperature of the combustion of the air and gas mixture, and transfer the heat to the water containing shell 302, which is used to preheat the water flow, facilitate the subsequent water mist vaporization, and allow the wind gap 3031 to be used for the flow of air.

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

Claims

1. A gas-fired multi-component thermal fluid oilfield thermal recovery equipment, characterized in that: include: An ignition assembly (1), the ignition assembly (1) comprising a combustion cylinder (101), a mounting shell (103), and an injection pipe (102) fixedly mounted in one body, an igniter (105) and a gas nozzle (106) fixedly mounted at the rear of the combustion cylinder (101), the gas nozzle (106) being capable of generating a mixture of fuel gas and air in a circular motion trajectory; An air intake assembly (2), the air intake assembly (2) being detachably mounted in the mounting housing (103), the air intake assembly (2) being used to introduce a mixture of high-pressure fuel gas and air; A water inlet assembly (3), the water inlet assembly (3) comprising a water inlet plate (301) fixedly mounted on the combustion cylinder (101), the water inlet plate (301) being fixedly connected to a water storage shell (302), the water storage shell (302) being mounted with a plurality of water nozzles (304), the water nozzles (304) being capable of generating water mist in a direction opposite to that of the gas sprayed by the gas nozzle (106); A heat conducting member (303) is fixedly mounted on the water holding shell (302), a dispersing member (305) for dispersing water flow is concentrically arranged in the water holding shell (302), the dispersing member (305) comprises a dispersing rod (3051) fixedly mounted in the water holding shell (302), a dispersing shell (3052) is evenly fixedly connected to the dispersing rod (3051), and a dispersing tip (3053) is fixedly connected to the water inlet end of the dispersing rod (3051); A preheating component (4), the preheating component (4) being installed in the water-containing housing (302), and comprising a heating element for heating the water flow and a filtering element for filtering the water flow; The heating element comprises a preheating installation plate (402) detachably mounted on the water inlet plate (301), and an electric heating pipe (401) is fixedly mounted on a side of the preheating installation plate (402) close to the water containing shell (302).

2. A gas-fired multi-component thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The installation shell (103) is located outside the combustion cylinder (101), the injection pipe (102) is located at the front of the installation shell (103), a installation cavity (104) is provided in the installation shell (103), the injection pipe (102) and the combustion cylinder (101) are in communication with each other, a guiding spiral groove (107) is provided on the inner wall of the combustion cylinder (101), and the gas nozzle (106) and the installation cavity (104) are in communication with each other.

3. The gas-fired multi-component thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The air intake assembly (2) comprises a mounting flange (201) detachably mounted on a mounting shell (103); a filter screen housing (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 surface of the mounting flange (201); and the ends of the gas inlet pipe (204) and the air inlet pipe (203) extending into the filter screen housing (202) are both provided with horizontal air outlets (205) in the same direction.

4. The gas-fired multi-component thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The filter component comprises a filter housing (403) fixedly mounted on the center of a side of the preheating mounting plate (402) away from the water housing (302), a filter element (404) being placed in the filter housing (403), a disassembly cover (406) being threadedly connected to one end of the filter housing (403) away from the preheating mounting plate (402), and a water inlet pipe (405) being fixedly connected to the disassembly cover (406).

5. The gas-fired multi-component thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The number of the electric heating tubes (401) is at least two and they are evenly arranged in a circle, and the electric heating tubes (401) are located outside the dispersion member (305).

6. The gas-fired multi-component thermal fluid oilfield thermal recovery equipment according to claim 1, characterized in that: The dispersion shell (3052) is in the shape of a hemispherical shell, the heat conducting member (303) is provided with an air letting notch (3031), and the heat conducting member (303) and the water body nozzle (304) are arranged in an alternating manner.

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