Efficient separation double-cone rotational flow pipe for oil exploitation

Abstract

The utility model relates to the technical field of double-cone rotational flow pipes for offshore oil exploitation, in particular to an efficient separation double-cone rotational flow pipe for oil exploitation. The efficient separation double-cone rotational flow pipe for oil exploitation comprises a rotational flow pipe body, an inlet pipe body is connected to the rotational flow pipe body, a first-stage rotational flow cavity, a large cone section, a second-stage rotational flow cavity and a small cone section are sequentially arranged on the rotational flow pipe body, and a coarse filter screen, a magnetic filter screen, a nanofiber filter screen and rectifying blades are arranged in the inlet pipe body. The rectifying blades are located on the side close to the rotational flow pipe body, and a temperature control sleeve is arranged on the outer side of the rotational flow pipe body. The coarse filter screen, the magnetic filter screen and the nanofiber filter screen are arranged on the inlet pipe body, so that various impurities in crude oil can be effectively filtered out. The coarse filter screen can intercept large particle impurities, the magnetic filter screen adsorbs iron-containing impurities, and the nanofiber filter screen filters small particles, so that the number of impurities entering the cyclone pipe is greatly reduced, and the risks of equipment blockage and abrasion are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of double-cone cyclone tube of offshore oil exploitation, in particular to high -efficient separation double-cone cyclone tube for oil exploitation. BACKGROUND

[0002] In offshore oil exploitation, crude oil is usually accompanied by a large amount of associated water, solid impurities and oil phase components of different densities. Efficient separation of these multiphase mixed fluids is a key link to ensure smooth production and effective use of resources. However, the existing separation equipment has many defects.

[0003] In terms of feed, offshore platforms are frequently affected by wind and wave factors, resulting in frequent and large fluctuations in feed flow and pressure, which makes the fluid entering the separation equipment unstable and difficult to form a stable cyclone field, thereby severely reducing the separation efficiency. At the same time, the impurities in the extracted crude oil are diverse, including sand, rust, wax and microorganisms, etc. Ordinary filtering devices are difficult to completely remove these impurities, and a large amount of impurities entering the cyclone tube not only accelerates the wear of internal components of the equipment, but also easily causes blockage, further affecting the separation effect.

[0004] In addition, the temperature of the offshore environment changes dramatically, with large diurnal temperature difference, and the temperature of seawater changes significantly with season and depth. When the temperature decreases, the viscosity of crude oil increases sharply, the resistance to oil droplet movement increases, and the separation of small particle size oil droplets becomes extremely difficult, resulting in a significant decrease in separation efficiency. In a high temperature environment, the activity of corrosive substances in oil (such as hydrogen sulfide, carbon dioxide, etc.) is enhanced, which can accelerate the corrosion of equipment materials and shorten the service life of the equipment. At the same time, frequent fluctuations in temperature also cause thermal expansion and contraction of the equipment, generating thermal stress, which, together with the scouring force of the fluid, exacerbates the damage to the equipment. These problems, combined, make the existing separation equipment inefficient in processing multiphase mixed fluids in offshore oil exploitation, and difficult to meet the actual production needs. SUMMARY

[0005] In view of the above deficiencies in the prior art, the purpose of the present utility model is to provide a high-efficiency separation double-cone cyclone tube for oil exploitation, which can effectively filter various impurities in crude oil by setting a coarse filter screen, a magnetic filter screen and a nanofiber filter screen in the inlet pipe body. The coarse filter screen can intercept larger particle impurities, the magnetic filter screen can adsorb iron-containing impurities, and the nanofiber filter screen can filter small particles, greatly reducing the number of impurities entering the cyclone tube and reducing the risk of equipment blockage and wear. At the same time, the structure of the inlet pipe body from coarse to fine and the design of the rectification blades can stabilize the speed and direction of the fluid entering the cyclone tube under the complex feeding conditions on the sea, ensuring the formation of a stable cyclone field and effectively improving the separation efficiency.

[0006] The utility model is implemented by using the following technical solutions:

[0007] The petroleum exploitation high-efficiency separation double-taper cyclone tube comprises a cyclone tube body, an inlet pipe body connected to the cyclone tube body, a first-stage cyclone cavity, a large taper section, a second-stage cyclone cavity and a small taper section arranged in sequence on the cyclone tube body, a coarse filter screen, a magnetic filter screen, a nanometer fiber filter screen and a rectification blade arranged in the inlet pipe body, the rectification blade being located on the side close to the cyclone tube body, and a temperature control sleeve arranged on the outer side of the cyclone tube body. The cyclone tube body is a core component, and the inside of the cyclone tube body is provided with a wear-resistant layer and a corrosion-resistant layer, which can effectively resist wear and corrosion and prolong the service life of the equipment.

[0008] The inlet pipe body is connected to the first-stage cyclone cavity, and the first-stage cyclone cavity is provided with an overflow port. The lower side of the small taper section is provided with a tail pipe.

[0009] The outer side of the inlet pipe body is provided with a heat preservation layer, the inlet pipe body is connected with an inlet pipeline, the inlet pipeline is located on the side away from the cyclone tube body, the inlet pipe body is provided with a valve, and the valve is located on the side close to the cyclone tube body.

[0010] The inlet pipe body is provided with an inlet coarse pipe cavity and an inlet fine pipe cavity, the inlet fine pipe cavity is located on the side close to the first-stage cyclone cavity, and the inlet coarse pipe cavity and the inlet fine pipe cavity are smoothly connected. The inlet pipe body adopts the structural design of the inlet coarse pipe cavity and the inlet fine pipe cavity, and a plurality of filter screens and a rectification blade are arranged in the inlet coarse pipe cavity. The plurality of filter screens can effectively filter impurities, and the rectification blade can stabilize the state of fluid entering the cyclone tube, thereby improving the separation efficiency. The valve is arranged to facilitate the control of the feed flow.

[0011] The coarse filter screen, the magnetic filter screen, the nanometer fiber filter screen and the rectification blade are all arranged in the inlet coarse pipe cavity, and the valve is arranged on the inlet fine pipe cavity. The magnetic filter screen is provided with an electromagnetic vibration device, which is used to vibrate the magnetic filter screen at a fixed time to shake off the adsorbed iron-containing impurities and avoid the clogging of the filter screen.

[0012] The temperature control sleeve is connected with the inlet coarse pipe cavity through a temporary storage tank, and the connection is located between the magnetic filter screen and the nanometer fiber filter screen.

[0013] The inner side of the cyclone tube body is provided with a wear-resistant layer and a corrosion-resistant layer in sequence, and the outer side of the cyclone tube body is provided with an adjusting layer.

[0014] The temperature control sleeve is connected with a temperature control water inlet pipeline, and the inlet coarse pipe cavity is provided with an impurity discharge pipeline below the inlet coarse pipe cavity. The impurity discharge pipeline is located between the inlet pipeline and the coarse filter screen. When the temperature of the crude oil is abnormal, the temperature control water inlet pipeline is used to adjust the temperature of the temperature control sleeve, so that the crude oil can be separated at a suitable temperature, thereby improving the separation effect. A control valve is arranged on the pipeline between the temporary storage tank and the inlet coarse pipe cavity. When the efficiency of the inlet pipe body is reduced, the control valve is opened to flush the inlet pipe body.

[0015] The angle of the large cone section is 12°, and the angle of the small cone section is 4°. The specific angle design of the large cone section 12° and the small cone section 4° optimizes the movement path and speed of the fluid in the cyclone tube, enhances the centrifugal force, and improves the separation capacity for different density substances.

[0016] The working principle of the utility model is:

[0017] In the offshore oil exploitation platform, the cyclone tube body is sequentially connected and fixed with the inlet pipe body, the inlet pipeline, the tail pipe and other components according to the design requirements, so as to ensure that the connection is tight and that there is no leakage risk of the pipelines. In the connection process, the interface is sealed by using special sealing materials. It is checked whether the coarse filter screen, the magnetic filter screen and the nanometer fiber filter screen are firmly installed and whether the filter screens are damaged. If the filter screens are found to be damaged, new filter screens are replaced in time to ensure the filtering effect. It is checked whether the angle of the rectification blade meets the design requirements, and if there is any deviation, the rectification blade is finely adjusted to ensure that it can effectively guide the fluid into the cyclone tube body. It is checked whether the connection between the temperature control sleeve and the temperature control water inlet pipeline is normal, and it is confirmed that there is no blockage or leakage. At the same time, it is checked whether the heat preservation layer is intact, and if it is damaged, it should be repaired in time to reduce heat loss.

[0018] The valve is slowly opened to control the flow of crude oil in the inlet pipeline, so that the crude oil enters the inlet pipe body at a suitable flow rate (controlled at 1-3 m / s). During the feeding process, the pressure changes before and after the valve are closely observed to ensure that the pressure is stable within the working range allowed by the equipment (0.5-1.5 MPa). The crude oil sequentially passes through the coarse filter screen, the magnetic filter screen and the nanometer fiber filter screen. The coarse filter screen filters out large particle impurities with a particle size greater than 1 mm, the magnetic filter screen adsorbs iron-containing impurities in the crude oil, and the nanometer fiber filter screen intercepts small particles with a particle size less than 0.1 μm, effectively removing various impurities in the crude oil and reducing the wear and blockage of the equipment interior. The filtered crude oil is guided by the rectification blade to enter the primary cyclone cavity in a tangent direction, forming a high-speed rotating flow field in the primary cyclone cavity. Due to the centrifugal force, substances with higher density (such as water, heavy oil and part of impurities) move towards the wall of the cyclone cavity, while light oil with lower density gathers towards the center. As the fluid flows downward into the large cone section, the 12° angle design of the large cone section causes the flow passage to gradually shrink, further enhancing the centrifugal force and accelerating the separation of substances with different densities. In the large cone section, substances with higher density continue to move closer to the wall and flow downward into the secondary cyclone cavity with the fluid. In the secondary cyclone cavity, the fluid continues to rotate to further strengthen the separation effect. Subsequently, the fluid enters the small cone section, and the 4° angle of the small cone section causes the flow passage to further shrink, and the centrifugal force is enhanced again, causing substances with higher density to move more concentratedly towards the wall and finally be discharged through the tail pipe. Light oil with lower density gradually moves towards the center during the separation process in the primary cyclone cavity, the secondary cyclone cavity and the small cone section, forming an inner cyclone, and is finally discharged from the overflow port, completing the separation of the multi-phase mixed fluid.

[0019] Compared with the prior art, the utility model has the advantages of:

[0020] (1) the utility model discloses a coarse filter screen, magnetic filter screen and nanometer fiber filter screen are set up at the inlet pipe body, can effectively filter various impurities in crude oil. The coarse filter screen can intercept larger particle impurities, the magnetic filter screen adsorbs iron-containing impurities, and the nanometer fiber filter screen filters tiny particles, greatly reducing the number of impurities entering the cyclone pipe, and reducing the risk of equipment blockage and wear.

[0021] (2) the setting of the temperature control sleeve makes the cyclone pipe have good temperature adjusting capacity. According to the change of the temperature of crude oil, the temperature of the temperature control sleeve is adjusted by using temperature control water into the pipeline. When the temperature of crude oil is too low, it is heated to reduce the viscosity of crude oil and promote oil drop movement and separation. When the temperature of crude oil is too high, it is cooled to avoid the volatilization of light oil and the intensification of equipment corrosion.

[0022] (3) the wear-resistant layer and the corrosion-resistant layer arranged in sequence on the inner side of the cyclone pipe body provide double protection for the equipment. The wear-resistant layer can effectively resist the erosion and wear of solid particles in crude oil, reducing the damage of the equipment caused by wear. The corrosion-resistant layer can isolate the corrosive substances in the oil, preventing chemical corrosion and electrochemical corrosion. The combination of the two significantly prolongs the service life of the cyclone pipe and reduces the equipment maintenance and replacement cost.

[0023] (4) the unique structure design of the primary cyclone cavity, the large cone section, the secondary cyclone cavity and the small cone section, combined with the specific angles of the large cone section 12 ° and the small cone section 4 °, optimizes the movement path and speed of the fluid in the cyclone pipe. The synergistic effect of different cyclone cavities and cone sections enhances the centrifugal force and improves the separation effect of different density substances, further improving the processing efficiency of multi-phase mixed fluid. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of the utility model high-efficiency separation double-cone cyclone pipe for oil exploitation;

[0025] Figure 2 It is a cross-sectional view of the cyclone pipe body;

[0026] In the drawing: 1, cyclone pipe body;2, inlet pipe body;3, inlet pipeline;4, primary cyclone cavity;5, secondary cyclone cavity;6, large cone section;7, small cone section;8, tail pipe;9, inlet coarse pipe cavity;10, inlet fine pipe cavity;11, temperature control sleeve;12, temporary storage tank;13, coarse filter screen;14, magnetic filter screen;15, nanometer fiber filter screen;16, rectifier blade;17, valve;18, impurity discharge pipeline;19, wear-resistant layer;20, corrosion-resistant layer;21, adjusting layer;22, overflow port;23, temperature control water inlet pipeline. DETAILED DESCRIPTION

[0027] In order to make the utility model purposes, technical schemes more clearly, the following will be further described in detail.

[0028] Embodiment 1

[0029] As Figure 1 shown, the petroleum exploitation uses high-efficiency separation double-cone cyclone pipe, including cyclone pipe body 1, cyclone pipe body 1 is connected with inlet pipe body 2, cyclone pipe body 1 is sequentially provided with primary cyclone chamber 4, big cone section 6, secondary cyclone chamber 5 and small cone section 7, the inside of inlet pipe body 2 is provided with coarse filter screen 13, magnetic filter screen 14, nanometer fiber filter screen 15 and rectification blade 16, rectification blade 16 is located at the side close to cyclone pipe body 1, the outside of cyclone pipe body 1 is provided with temperature control sleeve 11. Inlet pipe body 2 is connected with primary cyclone chamber 4, primary cyclone chamber 4 is provided with overflow port 22, the lower side of small cone section 7 is provided with tail pipe 8.

[0030] The outside of inlet pipe body 2 is provided with heat preservation layer, inlet pipe body 2 is connected with inlet pipeline 3, inlet pipeline 3 is located at the side far from cyclone pipe body 1, inlet pipe body 2 is provided with valve 17, valve 17 is located at the side close to cyclone pipe body 1. Inlet pipe body 2 is provided with inlet coarse pipe chamber 9 and inlet fine pipe chamber 10, inlet fine pipe chamber 10 is located at the side close to primary cyclone chamber 4, inlet coarse pipe chamber 9 and inlet fine pipe chamber 10 are smoothly connected. Inlet pipe body 2 adopts the structural design of inlet coarse pipe chamber 9 and inlet fine pipe chamber 10, and multiple layers of filter screens and rectification blade 16 are arranged in inlet coarse pipe chamber. Multiple layers of filter screens can effectively filter impurities, and rectification blade 16 can stabilize the state of fluid entering the cyclone pipe, thereby improving the separation efficiency. The arrangement of valve facilitates the control of feed flow. Coarse filter screen 13, magnetic filter screen 14, nanometer fiber filter screen 15 and rectification blade 16 are all located in inlet coarse pipe chamber 9, and valve 17 is located on inlet fine pipe chamber 10. Temperature control sleeve 11 is connected with inlet coarse pipe chamber 9 through temporary storage tank 12, and the connection is located between magnetic filter screen 14 and nanometer fiber filter screen 15. As Figure 2 shown, the inside of cyclone pipe body 1 is sequentially provided with wear-resistant layer 19 and anticorrosion layer 20, and the outside of cyclone pipe body 1 is provided with adjustment layer 21. Temperature control sleeve 11 is connected with temperature control water inlet pipeline 23, and impurity discharge pipeline 18 is arranged below inlet coarse pipe chamber 9, which is located between inlet pipeline 3 and coarse filter screen 13. The angle of big cone section 6 is 12°, and the angle of small cone section 7 is 4°.

[0031] The above-mentioned petroleum exploitation uses high-efficiency separation double-cone cyclone pipe, and when working, the following steps are included:

[0032] (1) Open the valve 17, and make the crude oil enter the inlet pipe body 2 at a flow rate of 1-3 m / s. During the feeding process, pay close attention to the pressure changes before and after the valve 17. The crude oil passes through the coarse filter screen 13, the magnetic filter screen 14 and the nanofiber filter screen 15 in turn. The coarse filter screen 13 filters out large-particle impurities with a particle size greater than 1 mm. The magnetic filter screen 14 adsorbs iron-containing impurities in the crude oil. The nanofiber filter screen 15 intercepts tiny particles with a particle size less than 0.1 μm, effectively removing various impurities in the crude oil and reducing the wear and blockage of the equipment interior.(2) The filtered crude oil enters the primary cyclone chamber 4 in a tangent direction under the guidance of the rectification blade 16, and forms a high-speed rotating flow field in the primary cyclone chamber 4. Due to the centrifugal force, the substances with a higher density such as water, heavy oil and part of impurities move to the wall of the cyclone chamber, while the light oil with a lower density gathers to the center. As the fluid flows downward into the large cone section 6, the gradually constricted flow passage of the 12°-angled design of the large cone section 6 further enhances the centrifugal force and accelerates the separation of substances with different densities. In the large cone section 6, the substances with a higher density continue to move close to the wall, and flow downward into the secondary cyclone chamber 5. In the secondary cyclone chamber 5, the fluid continues to rotate, further strengthening the separation effect.(3) Subsequently, the fluid enters the small cone section 7, and the further constricted flow passage of the 4°-angled design of the small cone section 7 again enhances the centrifugal force, so that the substances with a higher density move more concentratedly to the wall and are finally discharged through the tail pipe 8. The light oil with a lower density gradually moves to the center during the separation process in the primary cyclone chamber 4, the secondary cyclone chamber 5 and the small cone section 7, forms an inner cyclone, and is finally discharged from the overflow port 22, completing the separation of the multiphase mixed fluid.

Claims

1. A high-efficiency separation double-cone cyclone tube for oil exploitation, characterized in that, Including cyclone pipe body (1), cyclone pipe body (1) is connected with inlet pipe body (2), cyclone pipe body (1) is equipped with primary cyclone chamber (4), big cone section (6), secondary cyclone chamber (5) and small cone section (7) in proper order, the inside of inlet pipe body (2) is equipped with coarse filter screen (13), magnetic filter screen (14), nanometer fiber filter screen (15) and rectifier blade (16), rectifier blade (16) is located at the side close to cyclone pipe body (1), the outside of cyclone pipe body (1) is equipped with temperature control sleeve (11).

2. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 1, characterized in that, The inlet pipe body (2) is connected with the primary cyclone chamber (4), the primary cyclone chamber (4) is provided with an overflow port (22), and the lower side of the small cone section (7) is provided with a tail pipe (8).

3. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 1, characterized in that, The outside of the inlet pipe body (2) is provided with a heat preservation layer, the inlet pipe body (2) is connected with an inlet pipeline (3), the inlet pipeline (3) is located away from the cyclone pipe body (1), the inlet pipe body (2) is provided with a valve (17), and the valve (17) is located close to the cyclone pipe body (1).

4. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 3, characterized in that, The inlet pipe body (2) is provided with an inlet coarse pipe cavity (9) and an inlet fine pipe cavity (10), the inlet fine pipe cavity (10) is located close to the primary cyclone chamber (4), and the inlet coarse pipe cavity (9) and the inlet fine pipe cavity (10) are smoothly connected.

5. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 4, characterized in that, The coarse filter screen (13), the magnetic filter screen (14), the nanometer fiber filter screen (15) and the rectifier blade (16) are located in the inlet coarse pipe cavity (9), and the valve (17) is located on the inlet fine pipe cavity (10).

6. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 4, characterized in that, The temperature control sleeve (11) is connected with the inlet coarse pipe cavity (9) through a temporary storage tank (12), and the connection is located between the magnetic filter screen (14) and the nanometer fiber filter screen (15).

7. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 1, characterized in that, The inside of the cyclone pipe body (1) is sequentially provided with a wear-resistant layer (19) and a corrosion-resistant layer (20), and the outside of the cyclone pipe body (1) is provided with an adjusting layer (21).

8. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 4, characterized in that, The temperature control sleeve (11) is connected with a temperature control water inlet pipeline (23), and the lower side of the inlet coarse pipe cavity (9) is provided with an impurity discharge pipeline (18), which is located between the inlet pipeline (3) and the coarse filter screen (13).

9. The high-efficiency separation double-tapered cyclone tube for oil exploitation according to claim 1, characterized in that, The angle of the big cone section (6) is 12°, and the angle of the small cone section (7) is 4°.

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