Oil-gas mixing device for piston oil-gas mixed conveyer

Abstract

This utility model discloses an oil-gas mixing device for a piston-type oil-gas mixing machine. The mixing device comprises an oil-gas inlet component, an oil-gas mixing component, and an oil-gas homogenizing component connected in sequence. The oil-gas inlet component communicates internally with the oil-gas homogenizing component through the oil-gas mixing component. The homogenizing component consists of an inner sleeve tube, an outer sleeve tube, and an outer tube, arranged sequentially from the inside out. Small holes are evenly distributed on the surfaces of the outer sleeve tube and the inner sleeve tube. The outer tube of the homogenizing component has an inlet connector on its side and an outlet connector at its bottom that communicates with the interior of the inner sleeve tube. Compared with existing technologies, this utility model can achieve complete mixing of oil, gas, and liquid in oilfield wellheads, ensuring that no liquid hammer occurs during pressurization in the piston-type oil-gas mixing machine. It is applicable to oil-gas mixing devices for various piston-type oil-gas mixing machines, and has a simple structure, is easy to manufacture, requires no special materials, and has low manufacturing costs.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas compression and transportation, and in particular to an oil and gas mixing device for a piston-type oil and gas mixing machine. Background Technology

[0002] There are two main methods for gathering and transporting oil and associated gas in my country: oil and gas are separated and transported separately; oil and gas are mixed, transported to a processing station, separated, and then gathered again. The former is suitable for large oilfields, while the latter is suitable for desert oilfields, marginal oilfields, satellite oilfields, and long-distance pipeline mixed transportation. Currently, the various types of mixed transportation pumps used in medium and low-pressure exhaust conditions, such as screw pumps, liquid ring pumps, centrifugal pumps, vortex pumps, and swing rotor mixed transportation pumps, are relatively mature in technology. However, in practice, they are used for short-distance (exhaust pressure ≤ 5 MPa) gathering and transportation of oil with a small amount of associated gas. Wellhead oil and gas are mainly gas with a small amount of oil and water. If long-distance gathering and transportation is required (exhaust pressure ≥ 10 MPa, oil-to-gas volume ratio ≤ 1:9 in exhaust state), the aforementioned mixed transportation pumps are ineffective.

[0003] Currently, long-distance oil and gas gathering and transportation at wellheads with low oil content (exhaust pressure ≥10MPa, oil-gas volume ratio of 1:9 in exhaust state) can only be achieved using large-scale oil and gas gathering and transportation equipment.

[0004] However, the advent of the piston-type oil-gas mixing machine filled the gap in large-scale oil and gas gathering and transportation equipment. For details, see our company's developed piston-type oil-gas mixing machine for wellhead gas gathering and transportation, patent number CN202311448942.1, which can achieve "remote gathering and transportation of oil and gas from wellheads with low oil content (exhaust pressure ≥10MPa, oil-gas volume ratio in exhaust state is 1:9)". Although the piston-type oil-gas mixing machine is equipped with an anti-liquid hammer device inside the cylinder and designed with an intake valve and an exhaust valve (the structure of the intake and exhaust valves can be found in CN202222931841.7, "A mixing machine inlet and outlet valve for gathering and transporting oil and gas containing hydrogen sulfide"), the anti-liquid hammer device, intake valve, and exhaust valve all play a role in protecting against liquid hammer when it occurs. However, how to ensure sufficient mixing of oil, liquid, and gas remains a challenge. The core technology lies in ensuring that the mixture enters the cylinder in a turbulent state, preventing liquid slugging during pressurization. Therefore, the oil-gas mixing device is the core component of the piston-type oil-gas mixing machine. The oil-gas mixing device can completely mix the oil, gas, and liquid in the oilfield wellhead to form a turbulent state before it is input into the piston-type oil-gas mixing machine. This prevents liquid slugging when the mixed oil-liquid-gas enters the cylinder for pressurization. Otherwise, oil and water will accumulate in the piston-type oil-gas mixing machine, causing liquid slugging, which will seriously affect the operation of the equipment. Liquid slugging can only be prevented by anti-liquid slugging devices, and suction valves and discharge valves are designed for regulation and protection. Therefore, the structural design of the oil-gas mixing device is the key to the success of the piston-type oil-gas mixing machine. Utility Model Content

[0005] The purpose of this utility model is to provide an oil-gas mixing device for a piston-type oil-gas mixing machine that can achieve complete mixing of oil, gas, and liquid in the oil and gas at the wellhead of an oilfield, and ensure that no liquid slugging occurs when the piston-type oil-gas mixing machine is pressurized in the cylinder.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an oil-gas mixing device for a piston-type oil-gas mixing machine, the oil-gas mixing device comprising an oil-gas inlet component, an oil-gas mixing component, and an oil-gas homogenizing component connected in sequence, the oil-gas inlet component communicating with the interior of the oil-gas homogenizing component through the oil-gas mixing component, the oil-gas homogenizing component comprising, from the inside to the outside, an inner sleeve tube, an outer sleeve tube, and an outer tube, small holes being uniformly opened on the surface of the outer sleeve tube and the inner sleeve tube, the side of the outer tube of the oil-gas homogenizing component being provided with an inlet pipe connected to the oil-gas mixing component, and the bottom of the oil-gas homogenizing component being provided with an outlet pipe communicating with the interior of the inner sleeve tube.

[0007] Preferably, the holes on the outer sleeve tube and the holes on the inner sleeve tube are staggered. The sum of the diameter areas of the holes on the outer sleeve tube is the same as the diameter area of ​​the oil and gas output end of the oil and gas inlet component. The sum of the diameter areas of the holes on the inner sleeve tube is 5 to 10% smaller than the sum of the diameter areas of the holes on the outer sleeve tube.

[0008] Preferably, an annular chamber is provided between the outer sleeve tube, the inner sleeve tube, and the outer tube to facilitate gas-liquid mixing.

[0009] Preferably, the outer tube has a cover plate at the top and a blocking plate at the bottom, the outer sleeve and the outer tube are clamped and fixed between the cover plate and the blocking plate, and the outlet pipe is located at the center of the blocking plate.

[0010] Preferably, the top of the oil-gas mixing component is also provided with a positioning cover and a shoulder flange. The shoulder flange is welded to the top of the outer pipe, and the positioning cover is placed inside the shoulder flange. The bottom surface of the positioning cover is provided with a positioning ring groove that matches the upper end of the inner sleeve pipe and the outer sleeve pipe. The cover plate is set above the positioning cover and is fixedly connected to the shoulder flange by fastening bolts. A sealing gasket is also provided between the cover plate and the shoulder flange to provide a sealing function.

[0011] Preferably, the plug plate is welded to the bottom end of the outer tube, and the upper surface of the plug plate is provided with a positioning boss that matches the lower end of the outer sleeve tube. The outlet pipe is welded to the plug plate, and the upper end of the outlet pipe is provided with a positioning slot that matches the lower end of the inner sleeve tube.

[0012] Preferably, the oil and gas inlet component is a three-way structure with one inlet and two outlets. A set of oil and gas mixing components and oil and gas homogenizing components are symmetrically arranged on the left and right sides of the oil and gas inlet component. The oil and gas homogenizing components are respectively connected to the interior of two piston-type oil and gas mixing conveyors.

[0013] Preferably, the oil and gas inlet component consists of a tee and a reducer. The reducer is symmetrically welded to the two straight ends of the tee for oil and gas output. The reducer adopts a scaling pipe structure, consisting of one oil and gas inlet end and two oil and gas outlet ends, which are straight ends. The diameter area of ​​the oil and gas inlet end of the oil and gas inlet component is 1.25 times the sum of the diameter areas of the oil and gas outlet ends of the two reducers.

[0014] Preferably, the oil-gas mixing component is a tubular structure, and the casing is provided with left-handed and right-handed guide fins, which are arranged alternately along the length of the casing.

[0015] Preferably, the oil and gas inlet component, the oil and gas mixing component, and the oil and gas homogenizing component are fixedly connected by a flange structure. The front end of the inlet pipe is provided with an inlet flange and a loose flange. The inlet pipe is connected to the oil and gas output end of the oil and gas mixing component through the inlet flange and the loose flange. The lower end of the outlet pipe is provided with an outlet flange and a stiffener plate. The stiffener plate is welded between the outlet flange, the plug plate, and the outlet pipe.

[0016] Compared with existing technologies, the advantages of this invention are as follows: The oil-gas mixing device of this invention is a core component of a piston-type oil-gas mixing machine, which can achieve complete mixing of oil, gas, and liquid in the oilfield wellhead, ensuring that no liquid hammer occurs when the piston-type oil-gas mixing machine is pressurized in the cylinder. It is suitable for oil-gas mixing devices used in various piston-type oil-gas mixing machines. Moreover, it has a simple structure, is easy to manufacture, requires no special materials, and has low manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the oil-gas homogenization component of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the oil and gas inlet component of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the oil-gas mixing component of this utility model;

[0021] Figure 5 This is a schematic diagram of the assembly structure of the present invention and the piston-type oil-gas mixing machine.

[0022] In the picture:

[0023] 1. Oil and gas inlet components; 11. Inlet flange; 12. Main tee; 13. Reducer; 14. Outlet flange;

[0024] 2. Oil-gas mixing component; 21. Shoulder flange a; 22. Sleeve; 23. Left-hand guide fin; 24. Right-hand guide fin;

[0025] 3. Oil-gas mixing components; 31. Cover plate; 32. Sealing gasket; 33. Positioning cover; 34. Inner sleeve pipe; 35. Outer sleeve pipe; 310. Shoulder flange; 311. Outer pipe; 312. Blocking plate; 313. Outlet pipe; 314. Rib plate; 315. Outlet flange; 316. Inlet flange; 317. Inlet pipe; 318. Movable flange;

[0026] 4. Sealing ring;

[0027] 5. Piston-type oil-gas hybrid transporter. Detailed Implementation

[0028] The oil-gas mixing device of this utility model is a core component of the piston-type oil-gas mixing machine 5. It can achieve thorough and complete mixing of oil, gas, and liquid in the oilfield wellhead, ensuring that no liquid slugging occurs during pressurization within the cylinder of the piston-type oil-gas mixing machine 5. It is applicable to various piston-type oil-gas mixing machines 5. See [link to relevant documentation]. Figure 5 .

[0029] The present invention will be further described below. An oil-gas mixing device for a piston-type oil-gas mixing conveyor is provided. The oil-gas mixing device comprises an oil-gas inlet component 1, an oil-gas mixing component 2, and an oil-gas homogenizing component 3 connected in sequence. (See also...) Figure 1 The oil and gas inlet component 1 is used to inlet the gas-liquid mixture, the oil and gas mixing component 2 fully mixes the oil, gas and liquid in the oil and gas mixture, and the oil and gas homogenizing component 3 disperses and completely mixes the mixed gas.

[0030] The structural design of the oil and gas inlet component 1 is as follows, see below. Figure 2 The oil and gas inlet component 1 adopts a three-way structure with one inlet and two outlets, consisting of one oil and gas inlet end and two oil and gas outlet ends. Both oil and gas outlet ends are straight-through ends. The inlet and outlet diameter area ratio of a conventional three-way structure is 1:2. At this time, the gas flow rate in the oil and gas inlet component 1 is too slow, making it difficult to achieve good mixing in the oil and gas mixing component 2. By calculation, the mixing effect in the oil and gas mixing component 2 is optimal when the diameter area of ​​the oil and gas inlet end is 1.25 times the sum of the diameter areas of the two oil and gas outlet ends.

[0031] Therefore, to change the inlet and outlet air passage area of ​​the oil and gas inlet component 1, the structure of the oil and gas inlet component 1 was designed. The oil and gas inlet component 1 consists of a tee 12 and a reducer 13. The reducer 13 is symmetrically welded to the two straight ends of the tee 12 at the oil and gas outlet. The reducer 13 adopts a scaling pipe structure, which allows for stable oil and gas flow and increases the pressure where the pipe diameter decreases, which is more conducive to the mixing of oil and gas in the oil and gas mixing component 2. The oil and gas inlet end of the tee 12 is provided with an inlet flange 11, which is connected to the oil and gas inlet pipe. The oil and gas outlet end of the reducer 13 is provided with an outlet flange 14, and the oil and gas inlet component 1 is connected to the oil and gas inlet end of the oil and gas mixing component 2 through the outlet flange 14.

[0032] The manufacturing requirements for the oil and gas inlet component 1 are as follows:

[0033] The reducing fitting 13 and the outlet flange 14 are manufactured by butt welding; and the inlet flange 11, the tee 12, the reducing fitting 13, and the outlet flange 14 are all standard parts, which are easy to procure and manufacture.

[0034] The structural design of the oil-gas mixing component 2 is as follows, see below. Figure 3 The oil-gas mixing component 2 has a tubular structure, consisting of a shoulder flange a21 and a sleeve 22. The sleeve 22 contains left-handed guide fins 23 and right-handed guide fins 24, which are arranged alternately along the length of the sleeve 22. The design of the left-handed and right-handed guide fins 23 and 24 within the sleeve 22 allows the flow of oil and gas within the sleeve 22 to continuously change direction, causing collisions and mixing of oil and gas molecules to form a turbulent flow state, thus achieving the mixing of oil, gas, and liquid. The shoulder flange a21 is welded to both ends of the sleeve 22. One end of the sleeve 22 is connected to the oil-gas output end of the oil-gas inlet component 1 via the shoulder flange a21, and the other end is connected to the oil-gas input end of the oil-gas mixing component 3 via the shoulder flange a21.

[0035] The manufacturing requirements for the oil-gas mixing component 2 are as follows:

[0036] The oil-gas mixing component 2 is formed by butt welding of flanges and steel pipes into a shell side, with left and right spiral guide fins alternately installed in the shell side, and the shoulder flange a21 and sleeve 22 are standard pipe materials; the left spiral guide fin 23 and the right spiral guide fin 24 are formed by rolling stainless steel strips, which is simple to manufacture and has low manufacturing cost.

[0037] As a preferred embodiment, the connection between the oil and gas inlet component 1 and the oil and gas mixing component 2, and the connection between the oil and gas mixing component 2 and the oil and gas homogenizing component 3, are all fixed by flange structure, which is convenient for installation and connection, and the connection is provided with sealing ring 4 to play a sealing role.

[0038] The structural design of the oil-gas homogenization component 3 is as follows, see below. Figure 4 The internal structure of the oil-gas homogenizing component 3 is a multi-layered tubular structure. From the inside out, the component consists of an inner sleeve tube 34, an outer sleeve tube 35, and an outer tube 311, sequentially fitted together. Gaps are left between the outer sleeve tube 35 and the inner sleeve tube 34 and outer tube 311. Small holes are evenly distributed on the surfaces of the outer sleeve tube 35 and the inner sleeve tube 34, allowing the mixed gas to be dispersed and completely mixed. An inlet connector 317 is provided on the side of the outer tube 311. Pipe 317 serves as the oil-gas inlet and is connected to the oil-gas mixing component 2. The top of the outer pipe 311 is provided with a cover plate 31, and the bottom with a blocking plate 312. The outer sleeve pipe 35 and the outer pipe 311 are clamped and fixed between the cover plate 31 and the blocking plate 312. An outlet pipe 313 is located at the center of the blocking plate 312. The outlet pipe 313 communicates with the bottom of the inner sleeve pipe 34. The gas, after being dispersed and completely mixed, is discharged into the piston-type oil-gas mixing machine 5 through the outlet pipe 313. See the assembly diagram of the piston-type oil-gas mixing machine 5. Figure 5 .

[0039] In order to achieve better dispersion and even separation of the mixed gas in the oil-gas homogenization component 3, the small holes on the outer sleeve tube 35 and the inner sleeve tube 34 were designed. The small holes on the outer sleeve tube 35 and the inner sleeve tube 34 are staggered and will not directly convect and pass through, so as to achieve a better secondary homogenization effect.

[0040] Based on experimental test results, as a preferred option, the sum of the diameter areas of the small holes on the outer sleeve tube 35 is the same as the diameter area of ​​the oil and gas output end at one end of the oil and gas inlet component 1. The sum of the diameter areas of the small holes on the inner sleeve tube 34 is 5-10% smaller than the sum of the diameter areas of the small holes on the outer sleeve tube 35. This allows the mixed gas, after being uniformly divided once by the outer sleeve tube 35, to be accelerated when passing through the small holes on the inner sleeve tube 34, achieving the design requirements. At this point, the uniformity effect is the best, ensuring that the oil, gas, and liquid in the oil and gas are fully mixed.

[0041] To facilitate the positioning and installation of the inner sleeve tube 34 and the outer sleeve tube 35 within the outer tube 311, the top of the oil-gas mixing component 3 is also provided with a positioning cover 33 and a shoulder flange 310. The shoulder flange 310 is welded to the top of the outer tube 311, the positioning cover 33 is located inside the shoulder flange 310, and the cover plate 31 is positioned above the positioning cover 33 and is fixedly connected to the shoulder flange 310 by fastening bolts. The positioning cover 33, the sleeve tube 34, and the outer sleeve tube 35 can be installed by opening the cover plate 31. A sealing gasket 32 ​​is also provided between the cover plate 31 and the shoulder flange 310 to provide a sealing function.

[0042] To facilitate the installation and positioning of the inner sleeve tube 34 and the outer sleeve tube 35, a positioning cover 33 is designed. The bottom surface of the positioning cover 33 has a positioning ring groove that matches the upper end of the inner sleeve tube 34 and the outer sleeve tube 35. The blocking plate 312 is welded to the bottom end of the outer tube 311. The upper surface of the blocking plate 312 has a positioning boss that matches the lower end of the outer sleeve tube 35. The outlet pipe 313 is welded to the blocking plate 312. The upper end of the outlet pipe 313 has a positioning slot that matches the lower end of the inner sleeve tube 34. The design of the positioning ring groove realizes the installation and positioning of the upper and lower ends of the inner sleeve tube 34 and the outer sleeve tube 35.

[0043] The inlet pipe 317 is equipped with an inlet flange 316 and a loose flange 318 at its front end. The inlet pipe 317 is connected to the oil and gas output end of the oil-gas mixing component 2 through the inlet flange 316 and the loose flange 318. The outlet pipe 313 is equipped with an outlet flange 315 and a stiffener 314 at its lower end. The stiffener 314 is welded between the outlet flange 315, the plug plate 312, and the outlet pipe 313. The loose flange 318 is not affected by the orientation of the bolt holes of the shoulder flange a21 of the connected oil-gas mixing component 2; therefore, the installation of the oil-gas mixing device for the piston-type oil-gas mixing machine is very convenient; and the oil-gas-liquid inlet direction flange is also adjustable.

[0044] The manufacturing requirements for the oil-gas homogenization component 3 are as follows:

[0045] Among them, the cover plate 31 and the sealing gasket 32 ​​are standard parts, while the positioning cover 33, the inner sleeve tube 34, and the outer sleeve tube 35 are machined parts. The positioning cover 33 is a disc part, with a positioning ring groove machined on one side as required, and no requirements on the other side, so there is no difficulty in machining. The inner sleeve tube 34 and the outer sleeve tube 35 are two steel pipes of different diameters. Several small holes are drilled on the steel pipes as required, so there is no difficulty in machining. The shoulder flange 310, outer pipe 311, blocking plate 312, outlet pipe 313, stiffening plate 314, outlet flange 315, inlet flange 316, inlet pipe 317, and loose flange 318 are welded together to form the shell side. Among them, the shoulder flange 310, outlet flange 315, inlet flange 316, and loose flange 318 are standard parts and easy to procure. The outer pipe 311 is a steel pipe with welded bevels at both ends, and the inlet pipe 317 is then machined with insertion weld holes and bevels as required. The blocking plate 312 is a disc-shaped part, machined from sheet metal, with a positioning boss and the insertion weld hole and bevel of the inlet pipe 317 machined on one side. The stiffening plate 314 is a part formed by gas cutting and grinding. The inlet pipe 317 is made of steel pipe, with a welded bevel at one end. The insertion weld end is machined into a crescent-shaped positioning bayonet as required. All of the above processing and manufacturing are not difficult.

[0046] The above provides a detailed description of the oil-gas mixing device for a piston-type oil-gas mixing machine provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, based on the idea of ​​this utility model, there will be changes in the specific implementation and application scope. Changes and improvements to this utility model are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An oil-gas mixing device for a piston-type oil-gas mixing machine, characterized in that: The oil-gas mixing device consists of an oil-gas inlet component (1), an oil-gas mixing component (2), and an oil-gas homogenizing component (3) connected in sequence. The oil-gas inlet component (1) is connected to the inside of the oil-gas homogenizing component (3) through the oil-gas mixing component (2). The oil-gas homogenizing component (3) consists of an inner sleeve tube (34), an outer sleeve tube (35), and an outer tube (311) from the inside to the outside. Small holes are evenly opened on the surface of the outer sleeve tube (35) and the inner sleeve tube (34). The side of the outer tube (311) of the oil-gas homogenizing component (3) is provided with an inlet pipe (317) connected to the oil-gas mixing component (2). The bottom of the oil-gas homogenizing component (3) is provided with an outlet pipe (313) connected to the inside of the inner sleeve tube (34).

2. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 1, characterized in that: The small holes on the outer sleeve tube (35) and the small holes on the inner sleeve tube (34) are staggered. The sum of the diameter areas of the small holes on the outer sleeve tube (35) is the same as the diameter area of ​​the oil and gas output end of one end of the oil and gas inlet component (1). The sum of the diameter areas of the small holes on the inner sleeve tube (34) is 5 to 10% smaller than the sum of the diameter areas of the small holes on the outer sleeve tube (35).

3. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 1, characterized in that: The outer sleeve (35) and the inner sleeve (34) and outer tube (311) each have an annular chamber to facilitate gas-liquid mixing.

4. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 1, characterized in that: The outer tube (311) is provided with a cover plate (31) at the top and a block plate (312) at the bottom. The outer sleeve tube (35) and the outer tube (311) are clamped and fixed between the cover plate (31) and the block plate (312). The outlet pipe (313) is located at the center of the block plate (312).

5. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 4, characterized in that: The top of the oil-gas mixing component (3) is also provided with a positioning cover (33) and a shoulder flange (310). The shoulder flange (310) is welded to the top of the outer tube (311). The positioning cover (33) is placed inside the shoulder flange (310). The bottom surface of the positioning cover (33) is provided with a positioning ring groove that matches the upper end of the inner sleeve tube (34) and the outer sleeve tube (35). The cover plate (31) is set above the positioning cover (33) and is fixedly connected to the shoulder flange (310) by fastening bolts. A sealing gasket (32) is also provided between the cover plate (31) and the shoulder flange (310) to play a sealing role.

6. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 4, characterized in that: The blocking plate (312) is welded to the bottom end of the outer tube (311). The upper surface of the blocking plate (312) is provided with a positioning boss that matches the lower end of the outer sleeve tube (35). The outlet pipe (313) is welded to the blocking plate (312). The upper end of the outlet pipe (313) is provided with a positioning slot that matches the lower end of the inner sleeve tube (34).

7. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 1, characterized in that: The oil and gas inlet component (1) is a three-way structure with one inlet and two outlets. A set of oil and gas mixing components (2) and oil and gas homogenizing components (3) are symmetrically arranged on the left and right sides of the oil and gas inlet component (1). The oil and gas homogenizing components (3) are respectively connected to the interior of two piston-type oil and gas mixing machines.

8. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 7, characterized in that: The oil and gas inlet component (1) consists of a tee (12) and a reducer (13). The reducer (13) is symmetrically welded to the two straight ends of the tee (12) for oil and gas output. The reducer (13) adopts a scaling pipe structure, consisting of one oil and gas inlet end and two oil and gas outlet ends. The two oil and gas outlet ends are straight ends. The diameter area of ​​the oil and gas inlet end of the oil and gas inlet component (1) is 1.25 times the sum of the diameter areas of the oil and gas outlet ends of the two reducers (13).

9. The oil-gas mixing device for a piston-type oil-gas mixing machine according to claim 1, characterized in that: The oil-gas mixing component (2) is a tubular structure consisting of a shoulder flange a (21) and a sleeve (22). The sleeve (22) is provided with a left-handed guide fin (23) and a right-handed guide fin (24). The left-handed guide fin (23) and the right-handed guide fin (24) are arranged alternately along the length of the sleeve (22).

10. An oil-gas mixing device for a piston-type oil-gas mixing machine according to any one of claims 1-9, characterized in that: The oil and gas inlet component (1), the oil and gas mixing component (2), and the oil and gas homogenizing component (3) are fixedly connected by a flange structure. The front end of the inlet pipe (317) is provided with an inlet flange (316) and a loose flange (318). The inlet pipe (317) is connected to the oil and gas output end of the oil and gas mixing component (2) through the inlet flange (316) and the loose flange (318). The lower end of the outlet pipe (313) is provided with an outlet flange (315) and a stiffener plate (314). The stiffener plate (314) is welded between the outlet flange (315), the plug plate (312), and the outlet pipe (313).

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