A disassembly-free oil nozzle for cleaning filter screen and its installation and use methods

Abstract

The application discloses a disassembly-free oil nozzle for cleaning filter screen and an installation method and use method thereof, comprising an oil nozzle body and a slotted filter screen which are connected in cooperation; a cleaning scraper unit is arranged in the slotted filter screen; the diameter of the blade of the cleaning scraper unit is greater than the inner diameter of the slotted filter screen; and the blade of the cleaning scraper unit reciprocates in the slot of the slotted filter screen during operation. By arranging the cleaning scraper unit in the slotted filter screen, a stick smaller than the oil channel of the oil nozzle body can be used to repeatedly push the cleaning scraper unit to reciprocate in the slot of the slotted filter screen, so that the impurity particles stuck on the slotted filter screen can be removed without disassembling the oil nozzle body. The application discloses a use method of the disassembly-free oil nozzle for cleaning filter screen, and 15 minutes can be saved for each operation, the workload of an operator is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of throttling devices for oil well production in oil and gas development sites, and relates to an oil nozzle that does not require disassembly when cleaning the filter screen, as well as its installation and usage methods. Background Technology

[0002] The nozzle is a device for controlling oil well production. It is installed in the nozzle sleeve of the production wing of the wellhead via a threaded connection. High-pressure oil flow from the well is reduced in pressure after passing through the small orifice of the nozzle before entering the surface gathering and transportation pipeline and being transported to the processing station. However, due to the properties of underground oil, as the pressure and temperature decrease during the lifting process in the formation or wellbore, heavy components may separate out. Some wells have high levels of heavy components, which can enter surface pipelines, causing blockages and even leading to explosions in low-pressure surface pipelines. To prevent heavy components from entering surface pipelines, existing filter nozzle technology adds a slotted filter pipe to the front end of the traditional nozzle. This effectively filters and blocks heavy components at the nozzle tip, preventing them from entering low-pressure surface pipelines and causing pipe bursts.

[0003] However, when the existing filter nozzle becomes clogged, the operator needs to remove the nozzle from the nozzle sleeve and then use a wire brush to clean the heavy components on the filter screen. After cleaning, it is reinstalled into the nozzle sleeve. Due to the high frequency of clogging, the frequent disassembly and cleaning of the nozzle brings a lot of work to the on-site operators, and the safety risks associated with disassembly are also increased. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that in the prior art, the filter screen of the filter nozzle needs to be removed from the nozzle sleeve when cleaning, and to provide a filter nozzle that does not require disassembly when cleaning the filter screen, as well as its installation and usage methods.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] In a first aspect, the present invention provides an oil nozzle that does not require disassembly for cleaning a filter screen, comprising an oil nozzle body and a slotted filter screen that are connected in a mating manner; a cleaning scraper unit is installed in the slotted filter screen, and the blade diameter of the cleaning scraper unit is larger than the inner diameter of the slotted filter screen; the blade of the cleaning scraper unit reciprocates in the slots of the slotted filter screen when it is working.

[0007] A further improvement of the present invention is that:

[0008] The two ends of the slotted filter screen are enlarged; the inner wall of the slotted filter screen is fixedly connected with an internal filter screen support and a bushing.

[0009] The internal support and bushing of the filter screen includes a bushing and a plurality of support columns disposed on the outer wall of the bushing; the support columns are supported on the inner wall of the slit filter screen.

[0010] Specifically, there are three support columns; the three support columns are evenly arranged on the outer wall of the bushing.

[0011] The cleaning scraper unit includes a cleaning scraper central shaft, one end of which is fixedly connected to a fixed cleaning scraper, and the other end is threadedly connected to a detachable cleaning scraper; the cleaning scraper central shaft is movably connected to the internal support and bushing of the filter screen, and the fixed cleaning scraper and the detachable cleaning scraper are located on both sides of the internal support and bushing of the filter screen; a spring is sleeved on the cleaning scraper central shaft, and the spring is engaged between the internal support and bushing of the filter screen and the fixed cleaning scraper.

[0012] Both the fixed cleaning scraper and the detachable cleaning scraper are impeller-type structures with a number of blades. The number of blades is not greater than the number of slits in the slotted filter screen. The blades are positioned to engage with the slits when the fixed cleaning scraper and the detachable cleaning scraper are installed into the slotted filter screen.

[0013] The number of blades is equal to the number of slits in the slit filter.

[0014] The end of the slit filter screen that is not connected to the nozzle body is fixedly connected to a filter screen tail plug.

[0015] Secondly, the present invention provides a method for installing an oil nozzle without disassembling it when cleaning a filter screen, comprising the following steps:

[0016] Step 1: Insert the end of the spring self-cleaning scraper that is not fixed to the cleaning scraper onto the central shaft. Then, extend this end from the end that is connected to the cut filter screen and the nozzle body, and pass through the internal support and bushing of the filter screen. At this time, the blade of the fixed cleaning scraper should not be embedded in the cut.

[0017] Step 2: Install the detachable cleaning blade at the other end of the cleaning blade central shaft. This process requires the blade of the detachable cleaning blade to enter the other end of the cleaning blade central shaft along the slit.

[0018] Step 3: Install the slotted filter screen together with the nozzle body;

[0019] Step 4: Seal the other end of the slotted filter screen with the end cap of the filter screen.

[0020] Thirdly, the present invention provides a method for using a non-disassembly-removable oil nozzle when cleaning a filter screen, comprising the following steps:

[0021] Insert a rod with a diameter smaller than that of the nozzle body channel through the channel and push the fixed cleaning scraper. Push the fixed cleaning scraper towards the end of the slotted filter screen, and at the same time, move the entire cleaning scraper unit towards the end of the slotted filter screen to clean the impurities on the slotted filter screen. After removing the rod to relieve the force on the fixed cleaning scraper, the cleaning scraper unit returns to its original position under the action of the spring.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention discloses a non-disassembly-removable oil nozzle for cleaning filter screens. By setting a cleaning scraper unit in the slotted filter screen, without disassembling the oil nozzle body, a rod smaller than the oil passage of the oil nozzle body can be used to repeatedly push the cleaning scraper unit to reciprocate in the slots of the slotted filter screen, thereby removing impurity particles stuck in the slotted filter screen.

[0024] Furthermore, the two ends of the slotted filter screen have an expanded diameter structure, which facilitates the installation of the cleaning scraper unit into the slotted filter screen.

[0025] Furthermore, the cleaning scraper unit includes a cleaning scraper central shaft, one end of which is fixedly connected to a fixed cleaning scraper, and the other end is threadedly connected to a detachable cleaning scraper. A spring is sleeved on the cleaning scraper central shaft, and the spring is secured between the filter screen internal support, the bushing, and the fixed cleaning scraper. 3. During cleaning, after the rod is removed to relieve the force on the fixed cleaning scraper, the cleaning scraper unit can return to its original position under the action of the spring.

[0026] This invention discloses a method for cleaning a non-disassembly-removable oil nozzle. After depressurizing the oil nozzle sleeve, without disassembling the oil nozzle body, a metal rod is used to repeatedly push the cleaning scraper unit towards the tail end of the slotted filter screen through the oil nozzle channel of the oil nozzle body. This removes impurities stuck at the slotted position of the slotted filter screen. After cleaning, the metal rod is removed, and the end cap of the filter screen is installed, allowing the well to be started for production. Compared with the conventional method of disassembling the oil nozzle for cleaning, the method of this invention can save 15 minutes per operation, reduce the workload of operators, improve work efficiency, reduce the safety risk of pressure injury during oil nozzle disassembly, and improve the well production rate and productivity. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is a schematic diagram of a non-disassembly oil nozzle for cleaning filters according to the present invention;

[0029] Figure 2 This is a schematic diagram of the cleaning unit in a filter-cleaning nozzle that does not require disassembly in this invention.

[0030] The components are: 1-Oil nozzle body; 2-Slit filter screen; 3-Internal support and bushing of filter screen; 4-Slit; 5-End plug of filter screen; 6-Removable cleaning scraper; 7-Spring; 8-Central shaft of cleaning scraper; 9-Fixed cleaning scraper. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0037] The present invention will now be described in further detail with reference to the accompanying drawings:

[0038] See Figure 1 This invention discloses a non-disassembly-removable oil nozzle for cleaning a filter screen, comprising an oil nozzle body 1 and a slotted filter screen 2 connected together. A cleaning scraper unit is installed in the slotted filter screen 2, the blade diameter of which is larger than the inner diameter of the slotted filter screen 2. The blades of the cleaning scraper unit reciprocate within the slots of the slotted filter screen 2 during operation. Both ends of the slotted filter screen 2 have an expanded diameter structure to facilitate the installation of the cleaning scraper unit into the screen. An internal support and bushing 3 are fixedly connected to the inner wall of the slotted filter screen 2. The internal support and bushing 3 include a bushing and three support pillars on the outer wall of the bushing; the three support pillars are evenly supported on the inner wall of the slotted filter screen 2. A filter screen tail plug 5 is fixedly connected to the end of the slotted filter screen 2 that is not connected to the oil nozzle body 1.

[0039] See Figure 2 The cleaning scraper unit includes a cleaning scraper central shaft 8. A fixed cleaning scraper 9 is fixedly connected to one end of the central shaft 8, and a detachable cleaning scraper 6 is threadedly connected to the other end. The central shaft 8 is movably connected to the internal support and bushing 3 of the filter screen. The fixed cleaning scraper 9 and the detachable cleaning scraper 6 are located on both sides of the internal support and bushing 3. A spring 7 is fitted onto the central shaft 8, and the spring 7 is engaged between the internal support and bushing 3 and the fixed cleaning scraper 9. Both the fixed cleaning scraper 9 and the detachable cleaning scraper 6 are impeller-type structures with a plurality of blades. The number of blades is not greater than the number of slits in the slotted filter screen 2. The blades are positioned to engage with the slits when the fixed cleaning scraper 9 and the detachable cleaning scraper 6 are installed in the slotted filter screen 2. The number of blades is equal to the number of slits in the slotted filter screen 2.

[0040] This invention discloses a non-disassembly-removable oil nozzle for cleaning filter screens. By setting a cleaning scraper unit in the slotted filter screen, without disassembling the oil nozzle body, a rod smaller than the oil passage of the oil nozzle body can be used to repeatedly push the cleaning scraper unit to reciprocate in the slots of the slotted filter screen, thereby removing impurity particles stuck in the slotted filter screen.

[0041] This invention also discloses a method for installing the above-mentioned non-removable oil nozzle when cleaning the filter screen, comprising the following steps:

[0042] Step 1: Insert the spring 7 onto the end of the cleaning scraper 9 that is not installed on the central shaft 8 of the cleaning scraper. Then, extend this end from the end that is connected to the cut filter screen 2 and the oil nozzle body 1 and pass through the internal support of the filter screen and the bushing 3. At this time, the blade of the cleaning scraper 9 cannot be embedded in the cut.

[0043] Step 2: Install the detachable cleaning blade 6 at the other end of the cleaning blade central shaft 8. This process requires the blade of the detachable cleaning blade 6 to enter the other end of the cleaning blade central shaft 8 along the slit.

[0044] Step 3: Install the slotted filter screen 2 together with the nozzle body 1;

[0045] Step 4: Seal the other end of the slotted filter screen 2 with the filter screen tail plug 5.

[0046] This invention also discloses a method for using the above-mentioned non-disassembly oil nozzle when cleaning the filter screen, comprising the following steps:

[0047] A rod with a diameter smaller than that of the nozzle body 1 is inserted through the channel and pushed to move the fixed cleaning scraper 9 towards the tail end of the slotted filter screen 2. At the same time, the entire cleaning scraper unit moves towards the tail end of the slotted filter screen 2 to clean the impurities on the slotted filter screen 2. After the rod is removed to relieve the force on the fixed cleaning scraper 9, the cleaning scraper unit returns to its original position under the action of the spring 7.

[0048] This invention discloses a method for cleaning a non-disassembly-removable oil nozzle. After depressurizing the oil nozzle sleeve, without disassembling the oil nozzle body, a metal rod is used to repeatedly push the cleaning scraper unit towards the tail end of the slotted filter screen through the oil nozzle channel of the oil nozzle body. This removes impurities stuck at the slotted position of the slotted filter screen. After cleaning, the metal rod is removed, and the end cap of the filter screen is installed, allowing the well to be started for production. Compared with the conventional method of disassembling the oil nozzle for cleaning, the method of this invention can save 15 minutes per operation, reduce the workload of operators, improve work efficiency, reduce the safety risk of pressure injury during oil nozzle disassembly, and improve the well production rate and productivity.

[0049] The working process of this invention includes:

[0050] The two ends of the slotted filter screen 2 are enlarged, and the tail end of the slotted filter screen 2 is sealed with a filter screen tail plug 5. The blades of the fixed cleaning scraper 9 and the detachable cleaning scraper 6 are distributed at equal angles around their axes. The angles and number are consistent with the slot angles and number of the slotted filter screen 2 around its central axis. The maximum outer diameter of the blades is slightly larger than the outer diameter of the reduced diameter section of the slotted filter screen 2, but smaller than the inner diameter of the enlarged diameter at both ends of the slotted filter screen 2. During installation, the fixed cleaning scraper 9 end connected to the central axis 8 of the cleaning scraper is first connected to the spring 7. Insert the cleaning scraper into the central shaft 8, then insert it from the head of the slotted filter screen 2, passing through the internal support and bushing 3 of the filter screen. The other end of the independent detachable cleaning scraper 6 is inserted along the slot of the filter screen to the internal support and bushing 3 of the filter screen, and tightened by thread. Pay attention to the blade angle connected to the central shaft 8 of the cleaning scraper to ensure that it can enter along the slot. Connect the cleaning scraper unit to form a whole. Then, the head of the slotted filter screen 2 is threaded to the oil nozzle body 1, and the tail is sealed with the filter screen tail plug 5.

[0051] At this point, a metal rod with a diameter slightly smaller than the nozzle body channel is inserted through the nozzle channel and pushed to the center of the fixed cleaning scraper 9, propelling it towards the end of the filter screen. This cleans the impurities on the filter screen. After the force is released, the scraper returns to its original position under the action of the spring 7. The impurities stuck in the cut of the filter screen are then removed. After cleaning, the metal rod is removed, and the filter screen end plug 5 is reinstalled. Well production can then begin. Compared to the conventional nozzle disassembly and cleaning method, this method saves 15 minutes per operation, reduces the workload of operators, improves work efficiency, reduces the risk of injury from pressure during nozzle disassembly, and increases well production rate and productivity.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A non-disassembly-removable oil nozzle for cleaning filter screens, characterized in that, It includes a nozzle body (1) and a slotted filter screen (2) that are connected to each other; a cleaning scraper unit is installed in the slotted filter screen (2), and the blade diameter of the cleaning scraper unit is larger than the inner diameter of the slotted filter screen (2); The blades of the cleaning scraper unit reciprocate within the slits of the slit filter screen (2) during operation. The cleaning scraper unit includes a cleaning scraper central shaft (8), one end of which is fixedly connected to a fixed cleaning scraper (9), and the other end is threadedly connected to a detachable cleaning scraper (6); the cleaning scraper central shaft (8) is movably connected to the internal support and bushing (3) of the filter screen, and the fixed cleaning scraper (9) and the detachable cleaning scraper (6) are located on both sides of the internal support and bushing (3) of the filter screen; a spring (7) is sleeved on the cleaning scraper central shaft (8), and the spring (7) is locked between the internal support and bushing (3) of the filter screen and the fixed cleaning scraper (9); When in use, a rod with a diameter smaller than that of the nozzle body (1) is inserted through the channel and the fixed cleaning scraper (9) is pushed forward. The fixed cleaning scraper (9) is pushed towards the tail end of the slotted filter screen (2), and at the same time, the entire cleaning scraper unit is moved towards the tail end of the slotted filter screen (2) to clean the impurities on the slotted filter screen (2). After the rod is removed to relieve the force on the fixed cleaning scraper (9), the cleaning scraper unit returns to its original position under the action of the spring (7). The end of the slotted filter screen (2) that is not connected to the nozzle body (1) is fixedly connected to a filter screen tail plug (5).

2. The non-disassembly-free oil nozzle for cleaning the filter screen according to claim 1, characterized in that, The two ends of the slotted filter (2) are enlarged structure; the inner wall of the slotted filter (2) is fixedly connected with the filter internal support and the bushing (3).

3. The non-disassembly-free oil nozzle for cleaning the filter screen according to claim 2, characterized in that, The internal support and bushing (3) of the filter screen includes a bushing and a number of support columns provided on the outer wall of the bushing; the support columns are supported on the inner wall of the slit filter screen (2).

4. The non-disassembly-free oil nozzle for cleaning the filter screen according to claim 3, characterized in that, Specifically, there are three support columns; the three support columns are evenly arranged on the outer wall of the bushing.

5. The non-disassembly-free oil nozzle for cleaning the filter screen according to claim 1, characterized in that, Both the fixed cleaning scraper (9) and the detachable cleaning scraper (6) are impeller-type structures with a number of blades. The number of blades is not greater than the number of slits in the slotted filter screen (2). The blades are positioned to engage with the slits when the fixed cleaning scraper (9) and the detachable cleaning scraper (6) are installed in the slotted filter screen (2).

6. The non-disassembly-free oil nozzle for cleaning the filter screen according to claim 5, characterized in that, The number of blades is equal to the number of slits in the slit filter (2).

7. A method for installing a non-removable oil nozzle for cleaning a filter screen as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Insert the spring (7) into the end of the cleaning scraper shaft (8) where the cleaning scraper (9) is not installed, and then insert this end into the end that is connected to the cut filter screen (2) and the oil nozzle body (1) and pass through the internal support of the filter screen and the bushing (3). At this time, the blade of the cleaning scraper (9) cannot be embedded in the cut. Step 2: Install the removable cleaning blade (6) at the other end of the cleaning blade central shaft (8). This process requires the blade of the removable cleaning blade (6) to enter the other end of the cleaning blade central shaft (8) along the slit. Step 3: Install the slotted filter screen (2) together with the nozzle body (1); Step 4: Seal the other end of the slotted filter screen (2) with the filter screen tail plug (5).

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