A shale oil wellhead filter nozzle assembly

Abstract

This utility model discloses a shale oil wellhead filter nozzle assembly, comprising a throttle nozzle with a detachable filter head at its top. The filter head is threadedly connected to the throttle nozzle. The throttle nozzle comprises a cylindrical nozzle body with a central channel at its center. The filter head comprises a cylindrical sleeve with a hollow filter cap at its head. The sidewall of the sleeve has several circumferentially distributed spare filter holes, and the top end face of the filter cap has several evenly distributed primary filter holes. This shale oil wellhead filter nozzle assembly effectively improves filtration efficiency: by integrating a high-efficiency filtration device, it effectively blocks solid particles and impurities in the fluid, preventing these impurities from damaging downstream equipment and ensuring the safety and stability of the oil well extraction process.

Description

Technical Field

[0001] This utility model relates to a shale oil extraction device, and more specifically, a shale oil wellhead filter nozzle assembly. Background Technology

[0002] During shale oil extraction, wellhead fluids often contain a large number of solid particles, sand and gravel, as well as major impurities—broken or undissolved parts of soluble bridge plugs. If these impurities enter downstream equipment, such as pipelines, pumps and separators, without treatment, they will cause serious equipment wear, blockage or even damage, which will significantly affect production efficiency and equipment lifespan.

[0003] Despite some exploration within the industry, current wellhead filtration equipment still suffers from several problems, such as insufficiently compact structure, low filtration efficiency, and high maintenance difficulty. These issues not only limit the widespread application of the equipment but also affect the overall efficiency and profitability of shale oil extraction. In particular, existing technologies often fall short of ideal results in terms of filtration efficiency and equipment maintenance, leading to frequent nozzle clogging problems that severely impact the stable production and economic benefits of shale oil wells. Utility Model Content

[0004] Therefore, it is necessary to provide a shale oil wellhead filter nozzle assembly to address the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A shale oil wellhead filter nozzle assembly, characterized in that the shale oil wellhead filter nozzle assembly includes a throttle nozzle, the top of which is provided with a detachable filter head, the filter head and the throttle nozzle are connected by a threaded connection, the throttle nozzle includes a cylindrical throttle nozzle column, the center of which is provided with a central channel, the filter head includes a cylindrical sleeve, the head of which is provided with a hollow filter cap, the side wall of which is provided with a plurality of circumferentially distributed spare filter holes, and the top end face of the filter cap is provided with a plurality of uniformly distributed primary filter holes.

[0007] In a preferred embodiment of the present invention, the head of the throttle nozzle column is provided with an annular limiting ring.

[0008] In a preferred embodiment of the present invention, the sleeve has a positioning countersunk hole on its side wall, and a countersunk positioning pin is provided in the positioning countersunk hole, the end of which abuts against the outer wall of the throttle nozzle column.

[0009] In a preferred embodiment of this utility model, the sleeve and the filter cap are an integral structure.

[0010] In a preferred embodiment of this utility model, the filter cap is hexagonal.

[0011] In a preferred embodiment of this utility model, the apertures of both the primary filter hole and the backup filter hole are smaller than the inner diameter of the central channel.

[0012] In a preferred embodiment of this utility model, the aperture of the primary filter hole is smaller than that of the backup filter hole.

[0013] In a preferred embodiment of this utility model, the outer wall of the head of the throttle nozzle column is provided with an external thread, and the inner wall of the sleeve is provided with an internal thread, wherein the internal thread and the external thread are engaged.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention provides a shale oil wellhead filter nozzle assembly, which effectively improves filtration efficiency: by integrating a high-efficiency filter device, it effectively blocks solid particles and impurities in the fluid, preventing these impurities from damaging downstream equipment and ensuring the safety and stability of the oil well extraction process. Due to its modular design, maintenance is simple and replacement is convenient, reducing maintenance difficulty and costs, and improving the efficiency of oil well operations. At the same time, the modular design facilitates cleaning of the filter device, extending its service life and reducing the frequency of replacement. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the shale oil wellhead filter nozzle assembly of this utility model;

[0018] Figure 2 for Figure 1 A three-dimensional exploded view of the filter nozzle assembly at the shale oil wellhead;

[0019] Figure 3 for Figure 2 A magnified view of the details of region A in the diagram;

[0020] Figure 4 for Figure 2 A three-dimensional structural diagram of the filter head in the image;

[0021] Figure 5 for Figure 4A three-dimensional structural diagram of the filter head, providing another perspective;

[0022] Figure 6 for Figure 4 A three-dimensional structural diagram of the filter head, providing another perspective;

[0023] Figure 7 for Figure 6 A cross-sectional view of the filter head along the BB line;

[0024] The markings in the diagram are explained as follows: 10, throttle nozzle; 101, throttle nozzle body; 102, limit ring; 103, center channel; 20, filter head; 21, sleeve; 211, spare filter hole; 212, positioning countersunk hole; 22, filter cap; 221, primary filter hole; 30, countersunk hole positioning pin. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] like Figures 1 to 7 As shown, the shale oil wellhead filter nozzle assembly includes a throttle nozzle 10, with a detachable filter head 20 at the top of the throttle nozzle 10. The filter head 20 is connected to the throttle nozzle 10 via a threaded connection. The throttle nozzle 10 includes a cylindrical throttle nozzle body 101, with a central channel 103 at the center of the throttle nozzle body 101.

[0027] The head of the throttling nozzle column 101 is provided with an annular limiting ring 102. The filter head 20 includes a cylindrical sleeve 21. The head of the sleeve 21 is provided with a hollow filter cap 22. The side wall of the sleeve 21 is provided with a number of circumferentially distributed spare filter holes 211. The top end face of the filter cap 22 is provided with a number of uniformly distributed primary filter holes 221.

[0028] The head of the throttle nozzle 101 has an external thread 104 on its outer wall and an internal thread 210 on its inner wall. The internal thread 210 engages with the external thread 104.

[0029] It should be noted that the apertures of both the primary filter orifice 221 and the backup filter orifice 211 are smaller than the inner diameter of the central channel 103. Furthermore, the aperture of the primary filter orifice 221 is smaller than that of the backup filter orifice 211. The primary filter orifice 221 and the backup filter orifice 211 operate independently. The primary filter orifice 221 is responsible for preliminary filtration, while the backup filter orifice 211 serves as a backup channel. When the primary filter orifice 221 at the top becomes partially blocked due to impurity accumulation, the backup filter orifice 211 on the side can still ensure smooth fluid flow, maintaining uninterrupted oil well operations and thus guaranteeing the continuity and stability of production.

[0030] In addition, the sleeve 21 has a countersunk hole 212 on its side wall, and a countersunk positioning pin 30 is provided in the countersunk hole 212. The end of the countersunk positioning pin 30 abuts against the outer wall of the throttle nozzle column 101. The countersunk positioning pin 30 effectively enhances the stability of the connection. At the same time, when the filter head 20 needs to be replaced or cleaned, the throttle nozzle 10 can also be removed, simplifying the operation process and speeding up the replacement.

[0031] It should be noted that the sleeve 21 and the filter cap 22 are an integral structure. The filter cap 22 is hexagonal.

[0032] The following describes how the filter nozzle assembly at the shale oil wellhead works.

[0033] Install the throttle nozzle 10 onto the shale oil wellhead, ensuring it is secure. Align the filter head 20 with the inlet end of the throttle nozzle 10 and rotate until the threads are tightly connected.

[0034] Insert the countersunk pin 30 into the countersunk hole 212 and tighten the countersunk pin 30 with a tool. Finally, check all connections to ensure there are no leaks.

[0035] When maintenance is required, first, shut down the oil well and remove the countersunk positioning pin 30. Unscrew the filter head 20, remove it, and clean or replace it. After cleaning, reinstall the filter head 20 and the countersunk positioning pin 30. Turn on the oil well and check the flow rate and filtration effect.

[0036] This shale oil wellhead filter nozzle assembly effectively improves filtration efficiency: by integrating a high-efficiency filtration device, it effectively blocks solid particles and impurities in the fluid, preventing these impurities from damaging downstream equipment and ensuring the safety and stability of the oil well extraction process.

[0037] This shale oil wellhead filter nozzle assembly features a modular design, simplifying maintenance and facilitating replacement, thus reducing maintenance difficulty and costs and improving well operation efficiency. Simultaneously, the modular design facilitates cleaning of the filter device, extending its service life and reducing replacement frequency.

[0038] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A shale oil wellhead filter nozzle assembly, characterized in that, The shale oil wellhead filter nozzle assembly includes a throttle nozzle (10), and the top of the throttle nozzle (10) is provided with a detachable filter head (20). The filter head (20) and the throttle nozzle (10) are connected by a threaded connection. The throttle nozzle (10) includes a cylindrical throttle nozzle column (101), and the center of the throttle nozzle column (101) is provided with a central channel (103). The filter head (20) includes a cylindrical sleeve (21), and the head of the sleeve (21) is provided with a hollow filter cap (22). The side wall of the sleeve (21) is provided with a number of circumferentially distributed spare filter holes (211). The top end face of the filter cap (22) is provided with a number of uniformly distributed primary filter holes (221).

2. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The head of the throttle nozzle column (101) is provided with an annular limiting ring (102).

3. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The sleeve (21) has a positioning countersunk hole (212) on its side wall, and a countersunk positioning pin (30) is provided in the positioning countersunk hole (212). The end of the countersunk positioning pin (30) abuts against the outer wall of the throttle nozzle column (101).

4. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The sleeve (21) and filter cap (22) are an integral structure.

5. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The filter cap (22) is hexagonal.

6. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The apertures of the primary filter hole (221) and the backup filter hole (211) are both smaller than the inner diameter of the central channel (103).

7. The shale oil wellhead filter nozzle assembly according to claim 6, characterized in that, The aperture of the primary filter hole (221) is smaller than that of the backup filter hole (211).

8. The shale oil wellhead filter nozzle assembly according to claim 1, characterized in that, The head of the throttle nozzle column (101) is provided with an external thread (104), and the inner wall of the sleeve (21) is provided with an internal thread (210). The internal thread (210) is engaged with the external thread (104).

Images