Anti-blocking well-stop-free cleaning and filtering device for oil nozzle

Abstract

The utility model discloses an oil nozzle anti-blocking well-stop-free cleaning and filtering device, which relates to the technical field of oil nozzle anti-blocking equipment, and comprises a shell, an oil nozzle, an intelligent pressure remote transmission unit, a blow-down valve and a filter cartridge, one side of the shell is provided with a liquid inlet pipe, the other side of the shell is provided with a liquid outlet pipe, and the lower end of the shell is connected with a lower end cover; the liquid outlet pipe is connected with the intelligent pressure remote transmission unit through the oil nozzle, the blow-down valve is installed on the lower end cover, the filter cartridge is located in an inner cavity of the shell, the lower end of the filter cartridge is sealed, and the upper end of the filter cartridge is connected with the inner end of the liquid outlet pipe through an elbow; the filter cartridge comprises a central pipe and a wire winding pipe, a plurality of through holes are formed in the central pipe, and the upper end of the central pipe is connected with the lower end of the elbow through double nipples; the wire winding pipe sleeves the outer side of the central pipe; according to the device, continuous filtering of impurities is achieved, the problem that a small-diameter oil nozzle is prone to being blocked by silty-fine sand, polymers and the like is effectively solved, meanwhile, the blocking condition of the internal impurities can be judged according to the pressure, real-time pollution discharge can be achieved through the pollution discharge valve, and non-stop well cleaning can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzle anti-blocking equipment, in particular to a nozzle anti-blocking and well-stopping-free cleaning and filtering device. Background Art

[0002] The nozzle is an important device in the production process of oil wells. It is the channel for the liquid in the oil well to flow from the wellbore into the production process. The production pressure difference of the oil well is controlled through the throttling effect of the nozzle. The production is controlled in high-permeability layers, and the production pressure difference is enlarged in low-permeability layers to give full play to its potential. When the nozzle is opened, the underground oil and gas flow out through the oil well channel, pass through the nozzle throttling, and enter the production process. When the nozzle is closed, the valve closes and the oil and gas stop flowing out. By adjusting the liquid flow and flow rate, the oil well production is adjusted. The design and adjustment of the oil well nozzle are crucial for the production and stability of the oil well. By measuring the diameter of the throttling nozzle, the production pressure difference of the oil well is adjusted, the oil well production and wellhead pressure are controlled, so that the oil well is in a reasonable production state and stable and high production is maintained. The 5-6 unit in the sixth area of Gudong Oilfield in the oilfield is a subsequent water development unit in the polymer injection area. The formation pressure is high. During the exploitation of the oil well, fine sand and polymer are likely to cause blockage of the nozzle and affect production. There are the following problems: (1) Due to the small diameter of the nozzle, especially the 1-mm nozzle, it is extremely easy to be blocked by foreign matters such as fine powder sand and polymer in the produced fluid of the oil well, resulting in the shutdown of the oil well, affecting the normal production of the oil well and production loss. (2) After the nozzle of the oil well is blocked and shut down, it is not easy to be discovered. Generally, the discovery time is about 2-3 hours, seriously affecting the normal production of the oil well. (3) When the nozzle is blocked, the well needs to be shut down to clean the nozzle. In severe cases, it needs to be cleaned more than 7 times a day, with a large amount of repetitive work. Each cleaning requires 2 employees to work for 1 hour, and the labor intensity of the employees is relatively large. (4) Frequent shutdowns of oil wells are likely to cause the wells to lie down, increasing the production cost of the oil wells. (5) When cleaning the nozzle, it is necessary to drain the dirty oil externally, causing environmental pollution. (6) After the nozzle is blocked, the pressure cannot be released, and there is a safety hazard of pressure injury when disassembling the nozzle, threatening the personal safety of the operator. Content of the Utility Model

[0003] The purpose of the utility model is to provide a nozzle anti-blocking and well-stopping-free cleaning and filtering device aiming at the defects existing in the prior art.

[0004] The technical solution of the utility model is: a nozzle anti-blocking and well-stopping-free cleaning and filtering device, which includes a housing, a nozzle, an intelligent pressure remote transmission unit, a sewage discharge valve and a filter cartridge. A liquid inlet pipe is arranged on one side of the housing, a liquid outlet pipe is arranged on the other side, and its lower end is connected with a lower end cover; the liquid outlet pipe is connected with the intelligent pressure remote transmission unit through the nozzle, the sewage discharge valve is installed on the lower end cover, the filter cartridge is located in the inner cavity of the housing, its lower end is sealed, and its upper end is connected with the inner end of the liquid outlet pipe through an elbow and the filter cartridge is suspended in the inner cavity of the housing.

[0005] Preferably, the filter cartridge includes a central tube and a wire-wound tube. A number of through holes are provided on the central tube, and its upper end is connected to the lower end of the elbow through a coupling; the wire-wound tube is sleeved outside the central tube, and an annulus is provided between the two.

[0006] Preferably, the slit width of the wire-wound tube is 0.8 mm, and it has a triangular structure.

[0007] Preferably, the filter cartridge further includes an upper gland and a lower gland. Internal threads are provided in both the upper gland and the lower gland, and they are respectively threadedly installed at the upper and lower ends of the central tube. Annular grooves adapted to the ends of the wire-wound tube are provided on the opposite surfaces of the two; the upper and lower ends of the wire-wound tube are respectively clamped in the annular grooves of the upper gland and the lower gland.

[0008] Preferably, the housing is designed in a split type, including an upper housing and a lower housing; the upper end of the lower housing is rotatably installed at the lower end of the upper housing, and strip-shaped brushes corresponding to the wire-wound tube are provided on its inner wall.

[0009] Preferably, the brushes are arranged in a spiral shape on the inner wall of the lower housing.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The device operates stably and is reliable in use, realizing continuous filtration of impurities, effectively solving the problem that small-diameter nozzles are easily blocked by fine powder sand, polymers, etc. It has a small filtration resistance and can maintain a stable resistance. At the same time, the blockage situation of internal sundries can be judged according to the pressure magnitude, and real-time sewage discharge can be achieved by using the sewage discharge valve. It can realize cleaning without shutting down the well, reducing the cleaning operation time by 52 minutes per well on average, reducing the labor intensity of employees, ensuring continuous production of oil wells, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present invention;

[0013] Figure 2 is an exploded view of the filter cartridge;

[0014] Figure 3 is a cross-sectional view of the housing.

[0015] In the figure: 1. Housing, 101. Upper housing, 102. Lower housing, 2. Nozzle, 3. Intelligent pressure remote transmission unit, 4. Sewage discharge valve, 5. Liquid inlet pipe, 6. Liquid outlet pipe, 7. Lower end cover, 8. Elbow, 9. Central tube, 901. Through hole, 10. Wire-wound tube, 11. Upper gland, 12. Lower gland, 13. Coupling, 14. Brush. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further describes the present invention in conjunction with the drawings and embodiments. Example 1

[0017] Refer to Figure 1-2 As shown, an anti-blocking and well-stopping-free cleaning and filtering device for a nozzle 2 includes a housing 1, a nozzle 2, an intelligent pressure remote transmission unit 3 (collecting pressure data and uploading), a sewage discharge valve 4 and a filter cartridge. A liquid inlet pipe 5 is provided on one side of the housing 1, and a liquid outlet pipe 6 is provided on the other side. The lower end thereof is connected with a lower end cover 7; the liquid outlet pipe 6 is connected with the intelligent pressure remote transmission unit 3 through the nozzle 2. The sewage discharge valve 4 is installed on the lower end cover 7. The filter cartridge is suspended in the inner cavity of the housing 1, with its lower end sealed, and its upper end is connected with the inner end of the liquid outlet pipe 6 through an elbow 8.

[0018] More specifically, the filter cartridge includes a central pipe 9 and a wire-wound pipe 10. A plurality of through holes 901 are formed in the central pipe 9, and its upper end is connected with the lower end of the elbow 8 through a coupling 13; the wire-wound pipe 10 is sleeved outside the central pipe 9, and an annular space is provided between the two.

[0019] The slit width of the wire-wound pipe 10 is 0.8 mm, and it has a triangular structure with high strength, improving the filtering effect.

[0020] In addition, the filter cartridge further includes an upper pressing cover 11 and a lower pressing cover 12. Internal threads are provided in both the upper pressing cover 11 and the lower pressing cover 12, and the two are respectively threadedly installed at the upper and lower ends of the central pipe 9. Annular grooves adapted to the ends of the wire-wound pipe 10 are formed on the opposite surfaces of the two; the upper and lower ends of the wire-wound pipe 10 are respectively clamped in the annular grooves of the upper pressing cover 11 and the lower pressing cover 12. Both the upper pressing cover 11 and the lower pressing cover 12 are made of stainless steel, and their main function is to realize the positioning and fastening of the wire-wound pipe 10 and the central pipe 9, preventing displacement during use and causing filtering failure.

[0021] During oil well production, the produced fluid enters the interior of the housing 1 through the liquid inlet pipe 5 of the housing 1, passes through the wire-wound pipe 10 for filtering, enters the central pipe 9 through the through holes 901, and then enters the production process through the elbow 8, the liquid outlet pipe 6 and the nozzle 2. The sundries in the produced fluid are blocked by the wire-wound pipe 10 and remain outside the wire-wound pipe 10, thus preventing the occurrence of nozzle 2 blockage. When the pressure value behind the filtering device drops compared with the normal value, it indicates that there are more sundries outside the wire-wound pipe 10. The intelligent pressure remote transmission unit 3 automatically sends alarm data to the client, prompting to open the sewage discharge valve 4 at the lower part of the assembly to backwash the wire-wound pipe 10, so that the impurities are discharged through the sewage discharge valve 4; specifically: close the liquid inlet pipe 5, open the sewage discharge valve 4, and the produced fluid in the production process flows back and backwashes the wire-wound pipe 10, so that the impurities outside the wire-wound pipe 10 are discharged through the sewage discharge valve 4.

[0022] This device operates stably and is reliable in use, achieving continuous filtration of impurities, effectively solving the problem that the small-diameter oil nozzle 2 is easily blocked by fine sand, polymers, etc. It has a small filtration resistance and can maintain a stable resistance. At the same time, it can judge the blockage of internal debris according to the pressure magnitude. By using the sewage discharge valve 4, real-time sewage discharge can be achieved, and cleaning without shutting down the well can be realized. On average, each single well can reduce the cleaning operation time by 52 minutes, reducing the labor intensity of employees, ensuring continuous production of oil wells, and improving production efficiency. Embodiment Two

[0023] As a preferred embodiment of the present utility model, a brush 14 is additionally provided in this embodiment on the basis of Embodiment One, specifically as follows:

[0024] The housing 1 of this embodiment adopts a split design, including an upper housing 101 and a lower housing 102; the upper end of the lower housing 102 is rotatably installed at the lower end of the upper housing 101, and strip-shaped brushes 14 corresponding to the wire-wound tube 10 are provided on its inner wall. In this embodiment, the brushes 14 are axially arranged on the inner wall of the lower housing 102.

[0025] While backwashing the wire-wound tube 10, manually rotate the lower housing 102 to make the brush 14 clean the debris on the outer wall of the wire-wound tube 10. This setting further improves the cleaning efficiency and shortens the cleaning operation time. Embodiment Three

[0026] As a preferred embodiment of the present utility model, the difference between this embodiment and Embodiment Two lies in the arrangement form of the brush 14, specifically as follows:

[0027] Refer to Figure 3 As shown, in this embodiment, the brushes 14 are spirally arranged on the inner wall of the lower housing 102.

[0028] When cleaning, rotate the lower housing 102, and the spirally arranged brushes 14 have a downward pushing effect on the debris on the outer wall of the wire-wound tube 10. Therefore, this setting can further improve the cleaning efficiency.

[0029] The present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present utility model, and the changed content still falls within the protection scope of the present utility model.

Claims

1. A nozzle anti-blocking and well-stopping cleaning and filtering device, comprising a housing and a nozzle, characterized in that: It also includes an intelligent pressure remote transmission unit, a drain valve and a filter cartridge. A liquid inlet pipe is provided on one side of the shell, and a liquid outlet pipe is provided on the other side, and the lower end thereof is connected with a lower end cover; the liquid outlet pipe is connected to the intelligent pressure remote transmission unit through an oil nozzle, and the drain valve is installed on the lower end cover. The filter cartridge is located in the inner cavity of the shell, and its lower end is sealed, and its upper end is connected to the inner end of the liquid outlet pipe through an elbow so that the filter cartridge is suspended in the inner cavity of the shell.

2. The oil nozzle anti-blocking and well-stopping cleaning and filtering device according to claim 1 is characterized by: The filter cartridge includes a central tube and a wire-wrap tube. The central tube is provided with a plurality of through holes, and the upper end thereof is connected with the lower end of the elbow through a pair of threads. The wire-wrap tube is sleeved on the outer side of the central tube, and an annulus is provided between the two.

3. The oil nozzle anti-blocking and well-stopping cleaning and filtering device according to claim 2 is characterized by: The wire winding tube has a gap width of 0.8 mm and is a triangular structure.

4. The oil nozzle anti-blocking and well-stopping cleaning and filtering device according to claim 2 is characterized by: The filter cartridge also includes an upper pressure cover and a lower pressure cover, both of which are provided with internal threads, and are threadedly installed on the upper and lower ends of the central tube respectively, and annular grooves adapted to the ends of the wire winding tube are opened on the opposite surfaces of the two; the upper and lower ends of the wire winding tube are respectively clamped in the annular grooves of the upper pressure cover and the lower pressure cover.

5. The oil nozzle anti-blocking and well-stopping cleaning and filtering device according to claim 4 is characterized by: The shell adopts a split design, including an upper shell and a lower shell; the upper end of the lower shell is rotatably mounted on the lower end of the upper shell, and a strip brush corresponding to the wire winding tube is arranged on the inner wall thereof.

6. The oil nozzle anti-blocking and well-stopping cleaning and filtering device according to claim 5 is characterized by: The brush is arranged in a spiral shape on the inner wall of the lower shell body.

Images