Atomizing, spraying and diluting joint for petroleum

Abstract

The utility model relates to a petroleum atomizing and spraying diluting connector, which comprises a diluting connector and is characterized in that an output hole is arranged in the diluting connector, an end hole is arranged at one end of the output hole, an end head is arranged at one point of the diluting connector, and a nozzle is arranged on the outer side of the diluting connector. According to the jet diluting connector for petroleum engineering, the efficient atomization diluting technology is introduced, effective viscosity reduction of high-viscosity thick oil is achieved, and the fluidity of the thick oil and the yield of an oil well are remarkably improved. According to the technology, the thin oil consumption is reduced, the exploitation cost is reduced, the formation back pressure is reduced through the negative pressure synergistic effect, and the long-term production capacity of an oil reservoir is protected. In addition, the operation flexibility of the method allows the blending effect to be optimized according to different underground conditions, and the environmental influence is also reduced due to the use of the environment-friendly thin oil. The safety is improved, and the maintenance cost is reduced, so that the device has important application value and wide market prospect in the field of oil exploitation.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum engineering, in particular to an atomizing injection dilution joint for petroleum. Background Art

[0002] In the field of petroleum engineering, especially when it comes to the exploitation of crude oil with high viscosity, high wax content, gum and asphaltene, traditional exploitation technologies face many challenges. These crude oils are prone to solidify at lower temperatures or pressures, resulting in difficult flow in the oil pipe, or even blocking the oil pipe, seriously affecting the normal production and economic benefits of oil wells. In order to improve the exploitation efficiency of such heavy oil, various methods have been adopted in the industry, but there are generally problems such as high cost, low efficiency, and great impact on the formation.

[0003] A common method is to use thermal oil recovery technologies, such as steam injection or hot fluid circulation, to reduce the viscosity of crude oil by increasing the temperature of the oil reservoir. However, these technologies not only consume high energy, but also have high requirements for equipment and operation, and may also lead to thermal degradation of the formation, affecting the long-term development of the oil reservoir.

[0004] Another method is the chemical method, which injects chemical agents (such as diluents) into the oil well to reduce the viscosity of crude oil. Although this method can improve the fluidity of crude oil to a certain extent, the selection and proportioning of chemical agents need to be adjusted according to the characteristics of different oil wells, and the cost of chemical agents is high, and the impact on the environment cannot be ignored.

[0005] Mechanical methods such as physical stirring or pumping have also been tried, but these methods often require complex downhole equipment, increasing the difficulty and cost of operations, and have limited improvement on the fluidity of heavy oil.

[0006] Therefore, the existing technical solutions still have deficiencies in improving the exploitation efficiency of heavy oil, reducing costs, and reducing environmental impacts. There is an urgent need for a new technology to solve these problems. The injection dilution joint for petroleum engineering of the present invention is proposed under such a background, aiming to provide a more effective, economical and environmentally friendly heavy oil exploitation technology. Content of the Utility Model

[0007] In order to solve the problems of the existing technology, the utility model provides an atomizing injection dilution joint for petroleum.

[0008] To solve the above technical problems, the present utility model is achieved through the following technical solutions: An atomizing injection dilution joint for petroleum use, including a dilution joint, characterized in that: an output hole is provided inside the dilution joint, one end of the output hole is provided with an end hole, a head is provided at a point of the dilution joint, a nozzle is provided outside the dilution joint, the number of the nozzles is set to be multiple, and the installation angles of the multiple nozzles are all sixty degrees, which is used to guide the external oil to enter unidirectionally. The overall design is a tubular structure, and an output hole is provided inside, which serves as the main channel for viscous oil. One end of the output hole is provided with an end hole for communicating with the viscous oil layer, so that the viscous oil can smoothly enter the inside of the dilution joint. A head is provided at a certain point (usually the lower end) of the dilution joint, and the head further guides the viscous oil to enter the core area of the dilution joint.

[0009] Preferably, the dilution joint is placed inside a production casing, the top end of the production casing is fixedly connected with a surface casing, and the bottom end of the production casing is provided with a viscous oil layer.

[0010] Preferably, an annulus is provided between the dilution joint and the production casing, thin oil flows inside the annulus, a packer is fixedly connected inside the dilution joint, the axis of the packer is fixedly connected with the outer wall of the dilution joint, and one end of the dilution joint penetrates through the packer to the inside of the viscous oil layer.

[0011] Preferably, viscous oil is stored inside the viscous oil layer, the viscous oil enters the inside of the head through one end of the dilution joint, the thin oil enters the inside of the head through the nozzle, and the thin oil entering the inside of the head is mixed with the viscous oil to form mixed oil.

[0012] Preferably, the length of the dilution joint is set to 1400 mm, the installation distance between every two nozzles is set to 30 mm, the aperture of the output hole is set to 73 mm, and the cross-sectional diameter of the dilution joint is set to 120 mm.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The injection dilution joint for petroleum engineering of the present utility model realizes effective viscosity reduction of high-viscosity viscous oil by introducing an efficient atomizing dilution technology, significantly improves the fluidity of the viscous oil and the output of the oil well. This technology reduces the consumption of thin oil, lowers the production cost, and reduces the formation back pressure through the negative pressure enhancement effect, protecting the long-term production capacity of the oil reservoir. In addition, the operation flexibility of the present invention allows optimizing the dilution effect according to different downhole conditions, and the use of environmentally friendly thin oil also reduces the environmental impact. The characteristics of improved safety and reduced maintenance cost make the present invention have important application value and broad market prospects in the field of petroleum exploitation. Description of the Drawings

[0015] Figure 1It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic diagram of the working principle process of the present utility model.

[0017] Figure 1-2 In the figure: 1. Dilution mixing joint; 2. Production casing; 3. Surface casing; 4. Heavy oil layer; 10. Mixed oil; 11. End hole; 12. Output hole; 13. End head; 14. Nozzle; 20. Packer; 21. Dilute oil; 22. Annulus; 41. Heavy oil. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figure 1-2 shown, the atomizing injection dilution mixing joint for petroleum includes a dilution mixing joint 1, and is characterized in that: an output hole 12 is arranged inside the dilution mixing joint 1, one end of the output hole 12 is provided with an end hole 11, an end head 13 is arranged at a point of the dilution mixing joint 1, a nozzle 14 is arranged outside the dilution mixing joint 1, the number of the nozzles 14 is set to be multiple, and the installation angles of the multiple nozzles 14 are all 60 degrees, which is used to guide the external oil to enter unidirectionally. According to the formation temperature and the freezing point of the crude oil, the tool joint is lowered to an appropriate depth, and boosting holes with different angles and dilute oil atomizing nozzles are distributed on the tool joint to atomize the injected dilute oil, effectively disperse the thickening and solidifying factors in the heavy oil produced from the formation, thereby effectively reducing the viscosity and freezing point of the crude oil, improving the fluidity of the crude oil, ensuring that the oil pipe is not blocked during the oil extraction process, facilitating pipeline transportation on the ground, and reducing the extraction cost of similar heavy oil oilfields. Since the atomizing injection direction of this joint is opposite to the direction of formation production, a negative pressure effect is formed on the formation, so it also has the effect of increasing production.

[0020] The dilution joint 1 is placed inside the production casing 2. The top end of the production casing 2 is fixedly connected with a surface casing 3, and the bottom end of the production casing 2 is provided with a heavy oil layer 4. An annulus 22 is provided between the dilution joint 1 and the production casing 2, and thin oil 21 flows inside the annulus 22. A packer 20 is fixedly connected inside the dilution joint 1. The center of the packer 20 is fixedly connected with the outer wall of the dilution joint 1. One end of the dilution joint 1 penetrates through the packer 20 and enters the heavy oil layer 4. Heavy oil 41 is stored inside the heavy oil layer 4. The heavy oil 41 enters the end 13 through one end of the dilution joint 1, and the thin oil 21 enters the end 13 through the nozzle 14. The thin oil 21 entering the end 13 mixes with the heavy oil 41 to form mixed oil 10.

[0021] The length of the dilution joint 1 is set to 1400 mm, the installation distance between every two nozzles 14 is set to 30 mm, the aperture of the output hole 12 is set to 73 mm, and the cross-sectional diameter of the dilution joint 1 is set to 120 mm.

[0022] In summary, when the thin oil is sent to the downhole injection dilution joint by the surface pumping equipment, it enters through the boosting holes designed on the joint. The special design of these boosting holes can increase the flow rate and kinetic energy of the thin oil, providing the necessary power for the atomization process. The design of the boosting holes also takes into account the flow characteristics of the fluid to ensure that the thin oil enters the atomizing nozzle in the best way and reduces energy loss.

[0023] After passing through the boosting holes, the thin oil enters the atomizing nozzle. The internal structure and shape of the nozzle are precisely designed to generate a high-speed spray, atomizing the thin oil into fine droplets. These tiny droplets have a large surface area, increasing the contact area between the thin oil and the heavy oil, thereby improving the mixing efficiency. The atomized thin oil droplets quickly mix with the heavy oil produced from the formation near the joint, effectively dispersing the thickening and solidifying factors in the heavy oil and reducing its viscosity and freezing point.

[0024] Since the atomizing injection direction of the injection dilution joint is opposite to the formation production direction, this reverse injection generates a negative pressure area in the formation, which helps to attract more heavy oil to flow towards the joint area and mix with the thin oil. The negative pressure effect not only promotes the mixing of the thin oil and the heavy oil but also helps to increase the oil well production because it reduces the formation backpressure, making it easier for the crude oil to flow into the production casing.

[0025] The mixing process of the thin oil and the heavy oil is accompanied by the exchange of heat energy, which helps to regulate the downhole temperature environment. The heat of the thin oil can be partially transferred to the heavy oil, further promoting the fluidity of the heavy oil.

[0026] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A petroleum atomizing spray dilution joint, comprising a dilution joint (1), characterized in that: The dilution joint (1) is provided with an output hole (12) inside, one end of the output hole (12) is provided with an end hole (11), a point of the dilution joint (1) is provided with an end head (13), a nozzle (14) is provided on the outside of the dilution joint (1), the number of the nozzles (14) is set to be multiple, and the installation angle of the multiple nozzles (14) is sixty degrees, so as to guide the external oil to enter in one direction.

2. The atomizing spray dilution joint for petroleum according to claim 1, characterized in that: The dilution joint (1) is placed inside a production casing (2), the top end of the production casing (2) is fixedly connected to a surface casing (3), and the bottom end of the production casing (2) is provided with a heavy oil layer (4).

3. The atomizing spray dilution joint for petroleum according to claim 2, characterized in that: An annulus (22) is provided between the dilution joint (1) and the production casing (2), thin oil (21) flows inside the annulus (22), a packer (20) is fixedly connected inside the dilution joint (1), the axial center of the packer (20) is fixedly connected to the outer wall of the dilution joint (1), and one end of the dilution joint (1) passes through the packer (20) to the inside of the heavy oil layer (4).

4. The atomizing spray dilution joint for petroleum according to claim 3, characterized in that: The thick oil layer (4) stores thick oil (41), the thick oil (41) enters the end head (13) through one end of the dilution joint (1), the thin oil (21) enters the end head (13) through the nozzle (14), and the thin oil (21) entering the end head (13) is mixed with the thick oil (41) to form a mixed oil (10).

5. The atomizing spray dilution joint for petroleum according to claim 1, characterized in that: The length of the dilution joint (1) is set to 1400 mm, the installation distance between each two nozzles (14) is set to 30 mm, the aperture of the output hole (12) is set to 73 mm, and the cross-sectional diameter of the dilution joint (1) is set to 120 mm.

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