An integrated downhole multi-fluid generator head

Abstract

The application discloses an integrated downhole multi-element heat fluid generator head, which comprises a head body, a threaded hole one and a threaded hole two and a nozzle body which are sequentially arranged along an axial direction, a plurality of water channels are circumferentially arranged on the outer periphery of the head body, a water check valve is arranged in the water channel, a water nozzle is arranged at the rear end of the water channel, a fuel channel is arranged in the nozzle body, a plurality of air channels are circumferentially arranged on the rear end of the head body and surround the outer periphery of the nozzle body, and an air pressure sensor, a water pressure sensor, an oil pressure sensor and an igniter are arranged on the head body. The front end of the generator head can be directly connected with water pipelines, air pipelines and oil pipelines with different inner diameter sizes. The water channels can take away the heat of the generator head to the maximum extent, so that the overheating of the generator head is avoided. The generator head has high integration degree and small volume, and the leakage hidden danger of the connection interface and the interface position is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of heavy oil thermal recovery equipment technology in petroleum engineering, specifically to an integrated downhole multi-element thermal fluid generator head. Background Technology

[0002] Multi-element thermal fluid technology is a highly efficient new technology for the thermal extraction of heavy oil. It has the advantages of high combustion efficiency, zero carbon injection, environmental protection and energy saving. The high-temperature multi-element thermal fluid output by the multi-element thermal fluid technology has a comprehensive oil enhancement mechanism, which can significantly improve the production capacity of single wells and increase the crude oil recovery rate.

[0003] Multi-element thermal fluid technology is used in oil sands extraction, and its core equipment is the downhole generator. The downhole generator is a new type of oilfield enhancement equipment based on the surface multi-element thermal fluid generator. This equipment miniaturizes and integrates the surface-mounted multi-element thermal fluid generator, placing it into the oil well to directly generate high-temperature, high-pressure multi-element thermal fluids to improve oil recovery. However, because the downhole generator is installed inside the oil well casing, its maximum outer diameter is limited to 160mm due to the internal space constraints. Furthermore, the small inner diameter of the casing prevents the generator head from being connected to the tubing using existing flanges. In existing downhole generators, water check valves, air pressure sensors, water pressure sensors, and oil pressure sensors are all located on their respective pipelines, resulting in numerous interface locations and potential leakage risks. Summary of the Invention

[0004] The purpose of this invention is to overcome the deficiencies in the existing technology and provide an integrated downhole multi-element thermal fluid generator head. Based on a concentric tube design, two coaxially adjacent threaded holes (one and two) are designed at the front end to allow direct connection of a concentric tube composed of air and water pipelines with different inner diameters to the generator head. Several water channels are circumferentially distributed on the outer periphery of the head body, maximizing the removal of heat from the generator head by the flowing water, thus preventing overheating. A water check valve, air pressure sensor, water pressure sensor, and oil pressure sensor are all integrated inside the head body, making the generator head an integrated unit. With high precision and significantly reduced size, compared to the method of connecting water check valves, air pressure sensors, water pressure sensors, and oil pressure sensors to pipelines, the number of connection interfaces is significantly reduced, thus reducing the risk of leakage at the interface locations. The oil channel is located on one side of the head body and is connected to a continuous oil pipe through a threaded hole, which is simple to connect and does not interfere with air and water pipelines. The air flowing out of the air channel and the diesel flowing out of the rear outlet of the fuel channel are fully mixed at the rear end of the generator head before being sprayed out, ensuring that the diesel-air mixture sprayed from the generator head is fully combusted in the burner. The structural design is simple and reasonable, with high feasibility for preparation and implementation, and strong practicality.

[0005] To achieve the above object, the technical scheme of the present application is to design an integrated downhole multi-element thermal fluid generator head, comprising a head body, the head body is provided with thread hole one, thread hole two and nozzle body in sequence from front to back along the axial direction, the nozzle body is fixedly arranged in the center hole of the rear end of the head body, the inner diameter of the thread hole one is larger than that of the thread hole two, a plurality of water channels are arranged on the outer periphery of the head body in a ring shape, the front end of the water channel is distributed on the outer periphery of the bottom surface of the thread hole one in a ring shape, the rear end is distributed on the outer periphery of the rear end surface of the head body in a ring shape, a water check valve is arranged in the water channel, and a water nozzle is arranged at the rear end of the water channel;

[0006] The nozzle body is provided with a fuel channel in the axial direction, the front end of the fuel channel is closed, and the rear end is provided with a plurality of nozzle channels penetrating the outer part of the rear end of the head body, an oil channel is formed in the head body, the front end of the oil channel is provided with a thread hole three located on the outer periphery of the front end surface of the head body, and the rear end of the oil channel is connected with the fuel channel;

[0007] A plurality of air channels are arranged on the rear end of the head body in a ring shape and surround the outer periphery of the nozzle body, the front end of the air channel penetrates the thread hole two, and the rear end of the air channel is provided with a fourth inclined pipe section facing the rear end outlet of the fuel channel;

[0008] An air pressure sensor for measuring the air pressure in the air channel, a water pressure sensor for measuring the water pressure in the water channel, and an oil pressure sensor for measuring the oil pressure in the oil channel are arranged on the head body;

[0009] An igniter mounting channel is arranged on the head body, the front end of the igniter mounting channel penetrates the outer part of the front end of the head body, the rear end of the igniter mounting channel penetrates the rear end surface of the head body and corresponds to the rear end outlet of the nozzle channel, and an igniter is arranged in the igniter mounting channel.

[0010] The integrated downhole multi-element heat fluid generator head of the application is designed with coaxially adjacent threaded hole one and threaded hole two at the front end based on the concentric tube mode, so that the concentric tube composed of the air pipeline and the water pipeline with two different inner diameter sizes is directly connected with the generator head; a plurality of water channels are distributed at the outer periphery of the head body, so that the water flowing through the generator can take away the heat of the generator head to the maximum extent and avoid overheating of the generator head; the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are integrated in the head body, so that the generator head has high integration and the volume is significantly reduced; compared with the mode that the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are connected to the pipeline, the connection interface is significantly reduced, and the leakage risk at the interface position is reduced; the oil channel is located at one side of the head body and connected with the continuous oil pipe through the threaded hole three, the connection mode is simple and does not interfere with the air pipeline and the water pipeline; the air flow in the air channel and the diesel oil flowing out of the rear end outlet of the fuel channel are fully mixed and then sprayed out of the rear end of the generator head, so as to ensure that the diesel air mixture sprayed out of the generator head is fully burned in the burner; the structure design is simple and reasonable, the preparation and implementation are feasible, and the practicability is high.

[0011] The preferred technical solution is that the water channel comprises a first inclined pipe section and a first straight pipe section which are connected in sequence from front to back, the first inclined pipe section is arranged radially outwardly inclined along the jet direction of the water flow, and the water check valve and the water nozzle are both installed in the first straight pipe section. The water channel with the above structure design ensures the convenience of the connection between the generator head and the water pipeline, and the first straight pipe section facilitates the installation of the water check valve and the water nozzle, and the whole water channel is located at the outer periphery of the head body, which can effectively avoid the air channel, the oil channel and the nozzle body, so that the head body structure design layout is reasonable and helps the small integrated design of the head body.

[0012] The preferred technical solution is that the nozzle body rear end is provided with a ring groove one on the outer periphery, the rear end of the nozzle body is provided with a plurality of second inclined pipe sections which surround the outer periphery of the nozzle hole, the second inclined pipe sections are arranged radially inwardly inclined along the jet direction of the air flow, the front end of the second inclined pipe section is connected with the ring groove one, and the rear end of the second inclined pipe section is distributed on the rear end surface of the nozzle body.

[0013] The air passage comprises a third inclined pipe section and a fifth inclined pipe section which are in communication from front to back, the third inclined pipe section and the fifth inclined pipe section are inclined radially outward along the injection direction of the air flow, the rear end of the fifth inclined pipe section is distributed on the rear end of the outer circumferential side of the head body, the fourth inclined pipe section is inclined radially inward along the injection direction of the air flow, the front end of the fourth inclined pipe section is in communication with the rear end of the third inclined pipe section, and the rear end of the fourth inclined pipe section is in communication with the annular groove. A part of the air flowing through the air passage is sprayed out from the rear end of the generator through the fourth inclined pipe section, the annular groove one and the second inclined pipe section, while the diesel flowing through the fuel passage and the nozzle hole is atomized and sprayed out into the combustor after being fully mixed with the air flow in the second inclined pipe section, thereby ensuring the combustion efficiency of the diesel and air mixture in the combustor; another part of the air flowing through the air passage is sprayed out to the rear side of the generator head through the third inclined pipe section and the fifth inclined pipe section, so that the sprayed air can take away the heat of the lining inner wall installed on the rear end of the generator head, thereby fully cooling the lining inner wall and effectively preventing the lining inner wall from overheating and ablation.

[0014] Further preferred technical solutions have, the front end of the nozzle body is provided with an end cover, the center of the end cover is provided with a plugging screw for plugging the front end of the fuel passage, the end cover is provided with a plurality of air holes around the outer circumferential side of the fuel passage, the front end of the third inclined pipe section and the rear end surface of the end cover exist an annular gap, the outer circumferential surface of the end cover and the inner wall surface of the rear end of the threaded hole two are provided with a thread structure which is matched with each other, and the nozzle body is screwed and installed on the head body through the end cover. The front end of the fuel passage on the nozzle body is designed as an open type, which ensures the convenience of processing the nozzle body; the installation mode of the nozzle body on the head body is simple, which ensures the assembly and processing efficiency of the generator head; the design of the end cover makes the structure design of the air passage more reasonable, which ensures the smoothness of the air flow.

[0015] Preferably, the head body is radially provided with three sensor mounting holes, air pressure measuring pipe, water pressure measuring pipe, oil pressure measuring pipe, cable channel, the outer port of the sensor mounting hole is provided with a threaded plug, the air pressure sensor, water pressure sensor, oil pressure sensor are respectively installed in the three sensor mounting holes through the threaded plug one by one, the air pressure sensor is connected with the threaded hole through the air pressure measuring pipe, the rear port of the water pressure measuring pipe is located on the outer circumferential side of the rear end surface of the head body, the water pressure sensor is connected with the rear end of the head body through the water pressure measuring pipe, the oil pressure sensor is connected with the fuel channel through the oil pressure measuring pipe, the cable channel is provided on the outer side of the head body along the axial direction, and the cable channel penetrates the three sensor mounting holes, and the cables of the air pressure sensor, water pressure sensor and oil pressure sensor are inserted into the cable channel. The structure design and layout of the air pressure sensor, water pressure sensor and oil pressure sensor are ingenious and reasonable, which ensures the preparation and implementation feasibility of the generator head of the application.

[0016] Further preferably, the nozzle body is further provided with two annular grooves on the outer circumferential surface, the bottom surface of the annular groove is provided with a through hole connected with the fuel channel, the oil channel includes a second straight pipe section and a third straight pipe section connected in sequence from front to back, the second straight pipe section is arranged along the axial direction of the head body, the outer port of the third straight pipe section is connected with the second straight pipe section, and the inner port of the third straight pipe section and the inner port of the oil pressure measuring pipe are both connected with the annular groove two. The inner port of the third straight pipe section and the inner port of the oil pressure measuring pipe are both connected with the annular groove two, so as to realize the connection of the fuel channel, and the structure design is ingenious and reasonable, which ensures the convenience and efficiency of the assembly and processing of the nozzle body and the head body.

[0017] Further preferably, the head body is provided with a notch groove and a fourth straight pipe section at the front end of the outer circumferential surface, the fourth straight pipe section is provided with a front port distributed on the bottom of the notch groove and a rear end in a closed structure, the igniter mounting channel is arranged obliquely, the front port of the igniter mounting channel is connected with the fourth straight pipe section, and the front port of the cable channel is distributed on the bottom of the notch groove. The front port of the igniter mounting channel is connected with the fourth straight pipe section, and only the igniter needs to be installed in the igniter mounting channel, and then the plug is installed in the fourth straight pipe section, so as to ensure the convenience of the igniter installation; the front ports of the fourth straight pipe section and the cable channel are distributed on the bottom of the notch groove, so that the lengths of the two are effectively reduced, and the processing convenience is ensured.

[0018] Further preferred technical solutions also have, the ignition device installation channel, the fourth straight pipe section and the ignition device are correspondingly provided with two sets. The ignition device is provided with two sets, one is used, when one of the ignition device fails, another ignition device can be used to ignite, to ensure that the multi-fluid generator works normally.

[0019] Further preferred technical solutions also have, the thread hole one is 4-1 / 2 oil pipe thread, the thread hole two is 2-3 / 8 oil pipe thread, and the thread hole three is 3 / 4 oil pipe thread. The thread structure of this model has good broad spectrum, and the docking smoothness of the generator head and the conventional oil pipe, water pipe and air pipeline is ensured.

[0020] Further preferred technical solutions also have, the head body rear end is screw connected and installed with a cyclone, and the outer side of the cyclone is provided with a threaded channel in the axial direction. The cyclone makes the wind sprayed by the third inclined pipe section and the fifth inclined pipe section to the rear side of the generator head form a spiral cyclone, that is, the heat is carried away in the form of a spiral cyclone on the inner lining inner wall surface, to ensure the high cooling effect of the inner lining inner wall surface; the cyclone atomizes the fuel to form small oil droplets, to promote the full combustion of the fuel and air.

[0021] The advantages and beneficial effects of the present application are that:

[0022] 1. The integrated downhole multi-element thermal fluid generator head of the present application is based on the concentric tube mode, and coaxially adjacent thread hole one and thread hole two are designed at the front end, so that the concentric tube composed of two different inner diameter size specifications of air pipeline and water pipeline is directly connected with the generator head; a plurality of water channels are distributed in the outer periphery of the head body, so that the water flowing through the generator can carry away the heat of the generator head to the maximum extent, and the overheating of the generator head is avoided; the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are integrated in the head body, so that the generator head has high integration degree and the volume is significantly reduced; compared with the mode that the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are connected to the pipeline, the connection interface is significantly reduced, and the leakage risk at the interface position is also reduced; the oil channel is located on one side of the head body and connected with the continuous oil pipe through the thread hole three, the connection mode is simple, and does not interfere with the air pipeline and the water pipeline; the air flow in the air channel and the diesel oil outlet at the rear end of the fuel channel are fully mixed at the rear end of the generator head and sprayed out, to ensure that the diesel air mixture sprayed out of the generator head can be fully burned in the burner; the structure design is simple and reasonable, the preparation implementation feasibility is high, and the practicability is strong.

[0023] 2. The water channel comprises a first inclined pipe section and a first straight pipe section which are connected in sequence from front to back, the first inclined pipe section is arranged radially outwardly and inclinedly along the jet direction of water flow, and the water check valve and the water nozzle are both installed inside the first straight pipe section. The water channel with the above structure design ensures the convenience of the connection between the generator head and the water pipeline, the first straight pipe section facilitates the installation of the water check valve and the water nozzle, and the whole water channel is located on the outer circumferential side of the head body, which can effectively avoid the air channel, the oil channel and the nozzle body, so that the head body structure design layout is reasonable and helps the small integrated design of the head body.

[0024] 3. A part of the air flowing through the air channel is sprayed out from the rear end of the generator through the fourth inclined pipe section, the annular groove I and the second inclined pipe section, and the diesel oil flowing through the fuel channel and the nozzle channel is fully mixed with the air flow in the second inclined pipe section and then atomized and sprayed into the burner to burn, which ensures the combustion efficiency of the diesel oil and air mixture in the burner; another part of the air flowing through the air channel is sprayed to the rear side of the generator head through the third inclined pipe section and the fifth inclined pipe section, so that the sprayed air can take away the heat of the lining inner wall installed on the inner wall of the lining in the rear end of the generator head to fully cool the lining inner wall.

[0025] 4. The inner port of the third straight pipe section and the inner port of the oil pressure measuring pipe are connected with the annular groove II correspondingly to achieve the purpose of the connection of the two with the fuel channel, and the structure design is ingenious and reasonable, which ensures the convenience and efficiency of the assembly and processing of the nozzle body and the head body.

[0026] 5. The front port of the igniter installation channel is connected with the fourth straight pipe section, so that the igniter only needs to be installed in the igniter installation channel and then the plug is installed in the fourth straight pipe section, which ensures the convenience of the installation of the igniter; the front ports of the fourth straight pipe section and the cable channel are distributed on the bottom of the notch groove, so that the lengths of the two are effectively reduced, which ensures the processing convenience.

[0027] 6. The igniter is provided with two sets, one for standby and one for use, so that when one of the igniters fails, the other igniter can still be used for ignition to ensure the normal work of the multi-fluid generator.

[0028] 7. The cyclone is screw-connected and installed at the rear end of the head body, and the outer side of the cyclone is provided with a threaded channel along the axis direction. The cyclone makes the wind sprayed by the third inclined pipe section and the fifth inclined pipe section to the rear side of the generator head form a spiral cyclone, that is, the wind advances on the lining inner wall in the form of a spiral cyclone to take away heat, so as to ensure the efficient cooling effect on the lining inner wall; the cyclone atomizes the fuel to form small oil droplets to promote the full combustion of the fuel and air. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the front view of the integrated head of the downhole multi-thermal fluid generator.

[0030] Figure 2 is the front perspective view of the integrated downhole multi-element thermal fluid generator head of the present application;

[0031] Figure 3 is the rear view of the integrated downhole multi-element thermal fluid generator head of the present application;

[0032] Figure 4 is the rear perspective view of the integrated downhole multi-element thermal fluid generator head of the present application;

[0033] Figure 5 is the sectional view of the integrated downhole multi-element thermal fluid generator head of the present application at the water passage location;

[0034] Figure 6 is Figure 5 is the partial enlarged view of D in

[0035] Figure 7 is the sectional view of the integrated downhole multi-element thermal fluid generator head of the present application at the sensor mounting hole location;

[0036] Figure 8 is Figure 7 is the partial enlarged view of H in

[0037] Figure 9 is the sectional view of the integrated downhole multi-element thermal fluid generator head of the present application at the igniter mounting passage location.

[0038] In the figure: 1, head body; 1-1, sensor mounting hole; 1-2, air pressure measuring pipe; 1-3, water pressure measuring pipe; 1-4, oil pressure measuring pipe; 1-5, igniter mounting passage; 1-6, notch groove; 1-7, fourth straight pipe section; 1-8, cable passage; 2, threaded hole one; 3, threaded hole two; 4, water passage; 4-1, first inclined pipe section; 4-2, first straight pipe section; 5, water check valve; 6, water nozzle; 7, nozzle body; 7-1, fuel passage; 7-2, nozzle hole; 7-3, plugging screw; 7-4, end cover; 7-4-1, air hole; 7-5, annular groove one; 7-6, second inclined pipe section; 7-7, annular groove two; 8, air passage; 8-1, third inclined pipe section; 8-2, fourth inclined pipe section; 8-3, fifth inclined pipe section; 9, cyclone; 9-1, threaded passage; 10, oil passage; 10-1, second straight pipe section; 10-2, third straight pipe section; 10-3, threaded hole three; 11, air pressure sensor; 12, water pressure sensor; 13, oil pressure sensor; 14, threaded plug; 15, igniter. DETAILED DESCRIPTION

[0039] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0040] Example

[0041] like Figures 1-9 As shown, the present invention is an integrated downhole multi-element thermal fluid generator head, including a head body 1. The head body 1 is provided with threaded holes 2 and 3 connected end to end along the axial direction from front to back, and a nozzle body 7. The nozzle body 7 is fixed in the central hole at the rear end of the head body 1. The inner diameter of threaded hole 2 is greater than the inner diameter of threaded hole 3. A plurality of water channels 4 are provided circumferentially at intervals on the outer periphery of the head body 1. The front port of the water channel 4 is circumferentially distributed on the outer periphery of the bottom surface of threaded hole 2, and the rear port is circumferentially distributed on the outer periphery of the rear end surface of the head body 1. A water check valve 5 is installed inside the water channel 4, and a water nozzle 6 is installed at the rear end of the water channel 4.

[0042] The nozzle body 7 has a fuel channel 7-1 inside along the axial direction. The front end of the fuel channel 7-1 is closed and the rear end has a plurality of nozzle holes 7-2 that communicate with the rear end of the head body 1. The head body 1 has an oil channel 10. The front end of the oil channel 10 has a threaded hole 10-3 located on the outer periphery of the front end face of the head body 1. The rear end of the oil channel 10 communicates with the fuel channel 7-1.

[0043] The head body 1 has several air channels 8 arranged circumferentially around the outer periphery of the nozzle body 7 at intervals at the rear end. The front end of the air channel 8 is connected to the threaded hole 3. The rear end of the air channel 8 is provided with a fourth inclined tube section 8-2 facing the rear end outlet of the fuel channel 7-1.

[0044] The head body 1 is equipped with an air pressure sensor 11 for measuring the air pressure inside the air channel 8, a water pressure sensor 12 for measuring the water pressure inside the water channel 4, and an oil pressure sensor 13 for measuring the oil pressure inside the oil channel 10.

[0045] The head body 1 is provided with an igniter mounting channel 1-5. The front end of the igniter mounting channel 1-5 is connected to the front exterior of the head body 1, and the rear end of the igniter mounting channel 1-5 is connected to the rear end face of the head body 1 and corresponds to the rear end outlet of the nozzle channel 7-2. An igniter 15 is installed inside the igniter mounting channel 1-5.

[0046] Preferably, the water channel 4 comprises a first inclined pipe section 4-1 and a first straight pipe section 4-2, which are connected in series from front to back, the first inclined pipe section 4-1 is arranged radially outwardly inclined along the jet direction of water flow, and the water check valve 5 and the water nozzle 6 are both installed inside the first straight pipe section 4-2.

[0047] Preferably, the nozzle body 7 is provided with a circumferential groove 7-5 on the outer side surface of the rear end thereof, and the rear end of the nozzle body 7 is provided with a plurality of second inclined pipe sections 7-6 which are arranged around the outer side of the nozzle hole 7-2, the second inclined pipe sections 7-6 are arranged radially inwardly inclined along the jet direction of air flow, the front end of the second inclined pipe sections 7-6 is connected with the circumferential groove 7-5, and the rear end of the second inclined pipe sections 7-6 is distributed on the rear end surface of the nozzle body 7, and the rear end of the nozzle hole 7-2 is connected with the second inclined pipe sections 7-6.

[0048] The air channel 8 comprises a third inclined pipe section 8-1 and a fifth inclined pipe section 8-3, which are connected in series from front to back, the third inclined pipe section 8-1 and the fifth inclined pipe section 8-3 are both arranged radially outwardly inclined along the jet direction of air flow, the rear end of the fifth inclined pipe section 8-3 is distributed on the rear end of the outer side surface of the head body 1, the fourth inclined pipe section 8-2 is arranged radially inwardly inclined along the jet direction of air flow, the front end of the fourth inclined pipe section 8-2 is connected with the rear end of the third inclined pipe section 8-1, and the rear end of the fourth inclined pipe section 8-2 is connected with the circumferential groove 7-5.

[0049] Further preferably, the front end of the nozzle body 7 is provided with an end cover 7-4, the center of the end cover 7-4 is provided with a blocking screw 7-3 for blocking the front end of the fuel channel 7-1, the end cover 7-4 is provided with a plurality of air holes 7-4-1 which are arranged around the outer side of the fuel channel 7-1, the front end of the third inclined pipe section 8-1 and the rear end surface of the end cover 7-4 are provided with a threaded structure which is adapted to each other, and the nozzle body 7 is screwed to the head body 1 through the end cover 7-4.

[0050] Preferably, the head body 1 is radially provided with three sensor mounting holes 1-1, air pressure measuring pipe 1-2, water pressure measuring pipe 1-3, oil pressure measuring pipe 1-4, cable channel 1-8, the outer port of the sensor mounting hole 1-1 is provided with a threaded plug 14, the air pressure sensor 11, water pressure sensor 12, oil pressure sensor 13 are respectively installed in the three sensor mounting holes 1-1 through the threaded plug 14, the air pressure sensor 11 is connected with the threaded hole two 3 through the air pressure measuring pipe 1-2, the rear port of the water pressure measuring pipe 1-3 is located on the outer circumferential side of the rear end face of the head body 1, the water pressure sensor 12 is connected with the outside of the rear end of the head body 1 through the water pressure measuring pipe 1-3, the oil pressure sensor 13 is connected with the fuel channel 7-1 through the oil pressure measuring pipe 1-4, the cable channel 1-8 is provided on the outside of the head body 1 along the axial direction, and the cable channel 1-8 penetrates the three sensor mounting holes 1-1, and the cables of the air pressure sensor 11, water pressure sensor 12 and oil pressure sensor 13 are inserted into the cable channel 1-8.

[0051] Further preferably, the outer circumferential side of the nozzle body 7 is further provided with a circumferential groove two 7-7, the bottom surface of the circumferential groove two 7-7 is provided with a through hole penetrating the fuel channel 7-1, the oil channel 10 includes a second straight pipe section 10-1 and a third straight pipe section 10-2 connected end to end from front to back, the second straight pipe section 10-1 is arranged along the axis of the head body 1, the outer port of the third straight pipe section 10-2 is connected with the second straight pipe section 10-1, and the inner port of the third straight pipe section 10-2 and the inner port of the oil pressure measuring pipe 1-4 are both connected with the circumferential groove two 7-7.

[0052] Further preferably, the outer circumferential side of the head body 1 is further provided with a notch groove 1-6 and a fourth straight pipe section 1-7, the fourth straight pipe section 1-7 is distributed on the bottom of the notch groove 1-6, and the rear end is a closed structure, the igniter mounting channel 1-5 is arranged obliquely, the front port of the igniter mounting channel 1-5 is connected with the fourth straight pipe section 1-7, and the front port of the cable channel 1-8 is distributed on the bottom of the notch groove 1-6.

[0053] Further preferably, the igniter mounting channel 1-5, the fourth straight pipe section 1-7 and the igniter 15 are both provided with two sets.

[0054] Preferably, the threaded hole one 2 is 4-1 / 2 oil pipe thread, the threaded hole two 3 is 2-3 / 8 oil pipe thread, and the threaded hole three 10-3 is 3 / 4 oil pipe thread.

[0055] Further preferably, the rear end of the head body 1 is screw-connected with a cyclone 9, and the outer side of the cyclone 9 is provided with a threaded channel 9-1 along the axial direction.

[0056] The working principle of the integrated downhole multi-element heat fluid generator head of the present application is as follows:

[0057] The air pipeline with small inner diameter and the water pipeline with large inner diameter are connected to form a concentric pipe, which is directly connected with the generator head, wherein the front end of the generator head is connected with the water pipeline through the threaded hole one 2, connected with the air pipeline through the threaded hole two 3, and connected with the diesel pipeline through the threaded hole three 10-3; the water flow in the water pipeline is sequentially sprayed from the rear end of the generator head through the first inclined pipe section 4-1, the check valve 5 in the first straight pipe section 4-2 and the water nozzle 6, so as to cool the outer wall surface of the inner lining; a part of the air in the air pipeline is sprayed from the rear end of the generator head through the third inclined pipe section 8-1 and the fifth inclined pipe section 8-3, so as to cool the inner wall surface of the inner lining; another part of the air in the air pipeline enters the second inclined pipe section 7-6 through the third inclined pipe section 8-1, the fourth inclined pipe section 8-2 and the annular groove one 7-5; the diesel in the diesel pipeline enters the second inclined pipe section 7-6 through the second straight pipe section 10-1, the third straight pipe section 10-2, the fuel channel 7-1 and the nozzle channel 7-2, and is fully mixed with the air in the second inclined pipe section 7-6, and then is atomized and sprayed into the combustion chamber through the cyclone 9; the ignition device 15 ignites and burns the fine oil droplets entering the combustion chamber.

[0058] The integrated downhole multi-element heat fluid generator head of the present application is based on the concentric pipe mode, and coaxially adjacent threaded hole one and threaded hole two are designed at the front end part, so that the concentric pipe formed by the air pipeline and the water pipeline with two different inner diameter sizes is directly connected with the generator head; a plurality of water channels are annularly and intervally distributed on the outer periphery side of the head body, so that the water flowing through the generator can take away the heat of the generator head to the maximum extent, and the overheating of the generator head is avoided; the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are integrated in the head body, so that the integrated degree of the generator head is high, and the volume is significantly reduced; compared with the mode that the water check valve, the air pressure sensor, the water pressure sensor and the oil pressure sensor are connected to the pipeline, the connection interface is significantly reduced, and the leakage risk at the interface position is also reduced; the oil channel is located on one side of the head body, and is connected with the continuous oil pipeline through the threaded hole three, and the connection mode is simple and does not interfere with the air pipeline and the water pipeline; the air flow in the air channel and the diesel oil flowing out of the rear end outlet of the fuel channel are fully mixed and sprayed at the rear end of the generator head, so as to ensure that the diesel oil and air mixture sprayed from the generator head can be fully burned in the burner; the structure design is simple and reasonable, the preparation and implementation are feasible, and the practicability is strong.

[0059] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An integrated downhole multi-fluid generator head, comprising: The application relates to a head body (1) which is provided with a thread hole one (2), a thread hole two (3) and a nozzle body (7) in sequence from front to back along an axial direction, the nozzle body (7) is fixedly arranged in a central hole at the rear end of the head body (1), the inner diameter of the thread hole one (2) is larger than that of the thread hole two (3), a plurality of water channels (4) are arranged on the outer periphery of the head body (1) in a ring shape and at intervals, the front end of the water channel (4) is distributed on the outer periphery of the bottom surface of the thread hole one (2) in a ring shape, the rear end of the water channel (4) is distributed on the outer periphery of the rear end surface of the head body (1) in a ring shape, a water check valve (5) is arranged in the water channel (4), and a water nozzle (6) is arranged at the rear end of the water channel (4); The nozzle body (7) is internally provided with a fuel channel (7-1) along the axial direction, the front end of the fuel channel (7-1) is closed, the rear end of the fuel channel (7-1) is provided with a plurality of nozzle holes (7-2) which are in communication with the outside of the rear end of the head body (1), an oil channel (10) is arranged on the head body (1), the front end of the oil channel (10) is provided with a thread hole three (10-3) which is located on the outer periphery of the front end surface of the head body (1), and the rear end of the oil channel (10) is in communication with the fuel channel (7-1); A plurality of air channels (8) are arranged on the rear end of the head body (1) in a ring shape and at intervals and surround the outer periphery of the nozzle body (7), the front end of the air channel (8) is in communication with the thread hole two (3), and the rear end of the air channel (8) is provided with a fourth inclined pipe section (8-2) which faces the rear end outlet of the fuel channel (7-1); An air pressure sensor (11) for measuring the air pressure in the air channel (8), a water pressure sensor (12) for measuring the water pressure in the water channel (4) and an oil pressure sensor (13) for measuring the oil pressure in the oil channel (10) are arranged on the head body (1); An igniter mounting channel (1-5) is arranged on the head body (1), the front end of the igniter mounting channel (1-5) is in communication with the outside of the front end of the head body (1), the rear end of the igniter mounting channel (1-5) penetrates the rear end surface of the head body (1) and corresponds to the rear end outlet of the nozzle hole (7-2), and an igniter (15) is arranged in the igniter mounting channel (1-5). The head body (1) is radially provided with three sensor mounting holes (1-1), air pressure measuring pipe (1-2), water pressure measuring pipe (1-3), oil pressure measuring pipe (1-4), cable channel (1-8), the outer port of the sensor mounting hole (1-1) is provided with threaded plug (14), the air pressure sensor (11), water pressure sensor (12), oil pressure sensor (13) are respectively installed in the three sensor mounting holes (1-1) by threaded plug (14) one by one, the air pressure sensor (11) is communicated with the threaded hole two (3) by the air pressure measuring pipe (1-2), the rear port of the water pressure measuring pipe (1-3) is located on the outer circumferential side of the rear end surface of the head body (1), the water pressure sensor (12) is communicated with the rear end outside of the head body (1) by the water pressure measuring pipe (1-3), the oil pressure sensor (13) is communicated with the fuel channel (7-1) by the oil pressure measuring pipe (1-4), the cable channel (1-8) is opened on the outside of the head body (1) along the axial direction, and the cable channel (1-8) penetrates the three sensor mounting holes (1-1), the cables of the air pressure sensor (11), water pressure sensor (12) and oil pressure sensor (13) are all connected in the cable channel (1-8); The outer circumferential surface of the nozzle body (7) is further provided with a second annular groove (7-7), the bottom surface of the second annular groove (7-7) is provided with a through hole communicated with the fuel channel (7-1), the oil channel (10) includes a second straight pipe section (10-1) and a third straight pipe section (10-2) connected end to end from front to back, the second straight pipe section (10-1) is arranged along the axial direction of the head body (1), the outer port of the third straight pipe section (10-2) is connected with the second straight pipe section (10-1), and the inner port of the third straight pipe section (10-2) and the inner port of the oil pressure measuring pipe (1-4) are both connected with the second annular groove (7-7).

2. The integrated downhole multi-fluid heat generator head of claim 1, wherein, The water channel (4) includes a first inclined pipe section (4-1) and a first straight pipe section (4-2) connected end to end from front to back, the first inclined pipe section (4-1) is arranged radially outwardly inclined along the jet direction of water flow, and the water check valve (5) and the water nozzle (6) are both installed in the first straight pipe section (4-2).

3. The integrated downhole multi-fluid heat generator head of claim 1, wherein, The outer circumferential surface of the rear end of the nozzle body (7) is provided with a first annular groove (7-5), and the rear end of the nozzle body (7) is provided with a plurality of second inclined pipe sections (7-6) surrounding the outer circumferential side of the nozzle hole (7-2), the second inclined pipe sections (7-6) are arranged radially inwardly inclined along the jet direction of air flow, the front port of the second inclined pipe sections (7-6) is connected with the first annular groove (7-5), and the rear ports of the second inclined pipe sections (7-6) are distributed on the rear end surface of the nozzle body (7), and the rear port of the nozzle hole (7-2) is connected with the second inclined pipe sections (7-6). The air passage (8) comprises a third inclined pipe section (8-1) and a fifth inclined pipe section (8-3) which are in communication from front to back, the third inclined pipe section (8-1) and the fifth inclined pipe section (8-3) are both inclined radially outward along the injection direction of the air flow, the rear end of the fifth inclined pipe section (8-3) is distributed on the rear end of the outer circumferential side of the head body (1), the fourth inclined pipe section (8-2) is inclined radially inward along the injection direction of the air flow, the front end of the fourth inclined pipe section (8-2) is in communication with the rear end of the third inclined pipe section (8-1), and the rear end of the fourth inclined pipe section (8-2) is in communication with the annular groove (7-5).

4. The integrated downhole multi-fluid heat generator head of claim 3, wherein, The front end of the nozzle body (7) is provided with an end cover (7-4), the center of the end cover (7-4) is provided with a plugging screw (7-3) for plugging the front end of the fuel passage (7-1), a plurality of air holes (7-4-1) are arranged on the outer circumferential side of the fuel passage (7-1), there is an annular gap between the front end of the third inclined pipe section (8-1) and the rear end surface of the end cover (7-4), the outer circumferential side of the end cover (7-4) and the rear end of the inner wall surface of the threaded hole (3) are provided with a threaded structure matched with each other, and the nozzle body (7) is screwed and installed on the head body (1) through the end cover (7-4).

5. The integrated downhole multi-fluid heat generator head of claim 1, wherein, The front end of the outer circumferential side of the head body (1) is provided with a notched groove (1-6) and a fourth straight pipe section (1-7), the front end of the fourth straight pipe section (1-7) is distributed on the bottom of the notched groove (1-6), and the rear end is a closed structure, the igniter mounting channel (1-5) is inclined, the front end of the igniter mounting channel (1-5) is in communication with the fourth straight pipe section (1-7), and the front end of the cable channel (1-8) is distributed on the bottom of the notched groove (1-6).

6. The integrated downhole multi-fluid heat generator head of claim 5, wherein, The igniter mounting channel (1-5), the fourth straight pipe section (1-7) and the igniter (15) are both provided with two sets.

7. The integrated downhole multi-thermal fluid generator head of claim 1, wherein, The threaded hole (2) is a 4-1 / 2 oil pipe thread, the threaded hole (3) is a 2-3 / 8 oil pipe thread, and the threaded hole (10-3) is a 3 / 4 oil pipe thread.

8. The integrated downhole multi-fluid heat generator head of any of claims 1-7, wherein, The rear end of the head body (1) is screwed and installed with a cyclone (9), and the outer side of the cyclone (9) is provided with a threaded channel (9-1) along the axis direction.

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