A drilling fluid tee connector with built-in filter

Abstract

This utility model discloses a drilling fluid tee connector with a built-in filter screen, comprising: a horizontal cylinder, a vertical cylinder threaded to the top of the outer wall of the horizontal cylinder, a sealing ring abutting between the vertical cylinder and the horizontal cylinder, and a filter unit disposed inside the upper part of the horizontal cylinder. This utility model, through the cooperation of the horizontal cylinder, vertical cylinder, sealing ring, and filter unit, protects downstream equipment and optimizes drilling operation efficiency. During drilling fluid flow, it impacts the first and second impellers, causing them and the rotating rod to rotate. Multiple scrapers rotate around the rotating rod. During rotation, the bristles at the bottom of the scrapers and the scrapers themselves clean the filter holes on the surface of the filter screen, temporarily removing impurities clogging the filter holes, extending the time for smooth medium flow, reducing the frequency of cleaning and maintenance, and thus enhancing its practical performance.

Description

Technical Field

[0001] This utility model relates to the field of drilling accessories technology, and in particular to a drilling fluid tee connector with a built-in filter. Background Technology

[0002] Drilling fluid tees are key pipe fittings used in drilling fluid circulation systems during drilling operations. They serve as the "nerve center" of the drilling system, with their core function being the distribution, diversion, or directional conversion of drilling fluid through the connection of three channels, ensuring efficient and safe drilling operations. The built-in filter in the drilling fluid tee is an important design optimization in drilling engineering. Its core function is to improve drilling fluid quality through a physical filtration mechanism, protect downstream equipment, and optimize drilling efficiency. The filter is made of high-precision stainless steel or ceramic material, with a pore size typically ranging from 50-200 mesh (75-300 microns), effectively intercepting solid impurities such as rock cuttings, sand particles, and iron filings in the drilling fluid.

[0003] Currently, the filter structure of most drilling fluid tees on the market is simply set inside the tee. Although this structure can filter the medium passing through, protecting downstream equipment and optimizing drilling efficiency, in actual use, impurities clogging the filter surface will continuously block the filter holes, shortening the effective time for the medium to pass through normally, resulting in a high frequency of cleaning and maintenance. Its practical performance needs to be improved. Utility Model Content

[0004] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides a drilling fluid tee connector with a built-in filter screen. This connector can temporarily remove impurities clogging the filter holes, prolonging the time for smooth medium flow, reducing the frequency of cleaning and maintenance, and thus enhancing its practical performance. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A drilling fluid tee connector with a built-in filter screen includes: a horizontal cylinder, a vertical cylinder threaded to the top of the outer wall of the horizontal cylinder, a sealing ring abutting between the vertical cylinder and the horizontal cylinder, a filter unit provided inside the upper part of the horizontal cylinder, the filter unit including: a filter screen, the filter screen being located inside the upper part of the horizontal cylinder, multiple bolts inserted at the edge of the upper surface of the filter screen, the bolts penetrating a portion of the filter screen and threadedly connected to the horizontal cylinder, multiple filter holes being opened on the surface of the filter screen, a rotating rod being rotatably connected inside the filter screen, a first impeller being fixedly sleeved on the upper part of the outer wall of the rotating rod, a second impeller being fixedly connected to the bottom end of the rotating rod, multiple support plates being fixedly connected to the outer wall of the rotating rod, multiple bristles being fixedly connected to both sides of the bottom end of the support plates, a scraper being fixedly connected to the center of the bottom end of the support plates, the bottom ends of the scraper and the bristles being in contact with the upper surface of the filter screen.

[0006] Preferably, the top of the outer wall of the rotating rod has an opening.

[0007] Preferably, the plurality of support plates are evenly and equidistantly distributed relative to the center point of the rotating rod.

[0008] Preferably, the center points of the first impeller, the rotating rod, and the second impeller are all located on the same horizontal and vertical line.

[0009] Preferably, a protective unit is provided above the bolt, the protective unit comprising: a cap, the cap being located above the bolt, the cap being threadedly connected to the filter screen via an annular groove, a collar being fixedly fitted onto the lower outer wall of the cap, and a sealing ring being fixedly fitted onto the lower surface of the collar, the sealing ring being abutting against the filter screen.

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

[0011] (1) In this utility model, through the cooperation between the horizontal cylinder, the vertical cylinder, the sealing ring and the filter unit, the drilling fluid flows from the vertical cylinder to the horizontal cylinder and is diverted out. The multiple filter holes on the surface of the filter screen will intercept and filter the rock cuttings, sand particles and iron filings in the drilling fluid, which will protect the downstream equipment and optimize the drilling operation efficiency. During the flow of drilling fluid, the first impeller and the second impeller will be impacted, causing the first impeller, the second impeller and the rotating rod to rotate. Multiple scrapers rotate around the rotating rod. During the rotation, the brush bristles at the bottom of the scraper and the scraper itself can clean the filter holes on the surface of the filter screen, which can temporarily remove the impurities blocked in the filter holes, prolong the time for the medium to pass smoothly, reduce the frequency of cleaning and maintenance, and thus enhance its practical performance.

[0012] (2) In this utility model, through the cooperation between the horizontal cylinder, the vertical cylinder, the sealing ring, the filter unit and the protective unit, when it is necessary to clean the impurities accumulated on the filter screen during long-term use, the horizontal cylinder and the vertical cylinder are first separated from the external connecting pipe, and then the vertical cylinder is rotated counterclockwise to separate it from the horizontal cylinder. Then, the filter screen is back-blown cleaned with a water gun. The operation is relatively simple and convenient. In addition, the bolts required to connect the filter screen are provided with caps on the outside. The caps can wrap and protect the threaded connection of the bolts to prevent impurities from contacting the threaded connection of the bolts. This makes it easy to smoothly rotate the bolts counterclockwise to remove the filter screen from the horizontal cylinder, which is conducive to thoroughly cleaning the filter screen. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 The main view;

[0015] Figure 3 for Figure 2 A partial sectional view of the front view;

[0016] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] In the diagram: 1-Horizontal cylinder, 2-Vertical cylinder, 3-Sealing ring, 4-Filter screen, 5-Bolt, 6-Filter hole, 7-Rotating rod, 8-First impeller, 9-Second impeller, 10-Support plate, 11-Brush bristles, 12-Scraper, 13-Port, 14-Ring groove, 15-Sealing cap, 16-Ring, 17-Sealing ring. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0019] Example 1: As Figures 1-4As shown, this utility model provides a drilling fluid tee connector with a built-in filter, comprising: a horizontal cylinder 1, which serves as an important component of the drilling fluid flow path, having a suitable inner diameter and wall thickness to withstand the pressure and flow impact of the drilling fluid, ensuring stable operation during drilling operations; a vertical cylinder 2, threadedly connected to the top of the outer wall of the horizontal cylinder 1, also possessing good structural strength, with its top end connected to the end of the drilling fluid output pipe, thus constructing the main channel for drilling fluid from input to output; and a sealing ring 3 abutting between the vertical cylinder 2 and the horizontal cylinder 1, the sealing ring 3 being made of a wear-resistant, corrosion-resistant, and elastic material, such as rubber. The material effectively prevents drilling fluid leakage at the connection between the vertical cylinder 2 and the horizontal cylinder 1, ensuring normal flow of drilling fluid within the tee joint. A filter unit is installed inside the upper part of the horizontal cylinder 1, comprising a filter screen 4. The filter screen 4 is made of a high-strength, corrosion-resistant metal material, such as stainless steel, to ensure long-term use without damage in complex drilling fluid environments. Multiple bolts 5 are inserted into the upper edge of the filter screen 4. The bolts 5 have sufficient strength and thread precision to securely connect the filter screen 4 to the horizontal cylinder 1. The bolts 5 penetrate a portion of the filter screen 4 and are threaded into the horizontal cylinder 1, ensuring a strong and airtight connection. The filter screen 4 has multiple filter holes 6 on its surface. The size of the filter holes 6 is carefully designed to effectively intercept impurities such as rock cuttings, sand particles, and iron filings in the drilling fluid while ensuring smooth passage of the drilling fluid and improving filtration efficiency. A rotating rod 7 is rotatably connected inside the filter screen 4. The rotating rod 7 is rotatably connected to the filter screen 4 through a sealed bearing to ensure rotational flexibility. A first impeller 8 is fixedly sleeved on the upper part of the outer wall of the rotating rod 7. The first impeller 8 has a specific blade shape and angle, which can efficiently drive the rotating rod 7 to rotate under the impact of the drilling fluid. A second impeller 9 is fixedly connected to the bottom end of the rotating rod 7. The second impeller 9 cooperates with the first impeller 8 to further enhance the impact on the drilling fluid. To improve the efficiency of force utilization, multiple support plates 10 are fixed to the outer wall of the rotating rod 7. The support plates 10 are made of sturdy materials, such as hard alloy, to ensure that they will not easily deform or be damaged during rotation. Multiple bristles 11 are fixed to both sides of the bottom end of the support plate 10. The bristles 11 are made of soft and wear-resistant materials, such as nylon, which can effectively brush the surface of the filter screen 4 during rotation. A scraper 12 is fixed to the center of the bottom end of the support plate 10. The scraper 12 is made of hard rubber and can generate a strong scraping effect on the surface of the filter screen 4. The bottom ends of the scraper 12 and the bristles 11 are in contact with the upper surface of the filter screen 4 to ensure that impurities on the surface of the filter screen 4 can be thoroughly cleaned during rotation.

[0020] Example 2: The top of the outer wall of the rotating rod 7 is provided with an opening 13, which can be hooked by an external hook, so that the top of the rotating rod 7 can be pulled out first.

[0021] Example 3: Multiple support plates 10 are evenly and equidistantly distributed relative to the center point of the rotating rod 7. This even distribution method can ensure stability when the rotating rod 7 rotates.

[0022] Example 4: The center points of the first impeller 8, the rotating rod 7, and the second impeller 9 are all located on the same horizontal and vertical line. This design ensures that the impeller can smoothly drive the rotating rod 7 to rotate when it is impacted by drilling fluid, reducing vibration and deviation during rotation, improving the stability and reliability of the self-cleaning system, and thus more effectively removing impurities from the filter hole 6.

[0023] Example 5: A protective unit is provided above the bolt 5. The protective unit includes a cap 15, which is located above the bolt 5. The cap 15 is made of a corrosion-resistant material, such as plastic or metal-plated material, which can protect the bolt 5. A collar 16 is fixedly sleeved on the lower part of the outer wall of the cap 15. A sealing ring 17 is fixedly connected to the lower surface of the collar 16. The sealing ring 17 is made of an elastic sealing material, such as silicone, which can abut against the filter screen 4 to prevent impurities from contacting the threaded connection of the bolt 5. This avoids damage or rust to the threads due to impurities getting stuck. It ensures that when the bolt 5 needs to be disassembled for cleaning or replacement of the filter screen 4, the bolt 5 can be smoothly rotated counterclockwise to remove the filter screen 4 from the horizontal cylinder 1, which facilitates a comprehensive and thorough cleaning of the filter screen 4 and ensures that the filtration performance of the filter screen 4 is always kept in good condition.

[0024] Working principle:

[0025] Drilling fluid circulation and filtration principles:

[0026] The top of the vertical cylinder 2 is connected to the end of the drilling fluid output pipe, and the two ends of the horizontal cylinder 1 are connected to the ends of the external drilling fluid input pipe. This connection method forms a flow channel for the drilling fluid. The drilling fluid flows from the vertical cylinder 2 to the horizontal cylinder 1 and then flows out in a split. During this process, the filter screen 4 in the filtration unit plays a key role. The surface of the filter screen 4 is covered with multiple filter holes 6. When the drilling fluid flows through the filter screen 4, impurities such as rock cuttings, sand particles, and iron filings are intercepted and filtered by the filter holes 6, thereby effectively preventing these impurities from entering the downstream equipment and protecting the downstream equipment. At the same time, the quality of the drilling fluid after filtration is improved, reducing equipment failures and wear caused by impurities, and thus optimizing drilling operation efficiency.

[0027] Self-cleaning principle:

[0028] During drilling fluid flow, the flowing drilling fluid will exert an impact force on the first impeller 8 and the second impeller 9. Due to the impact force, the first impeller 8, the second impeller 9 and the rotating rod 7 connected to them will rotate around their own axis. Multiple scrapers 12 rotate around the rotating rod 7. During the rotation, the bristles 11 at the bottom of the scraper 12 directly contact the surface of the filter screen 4 and brush the surface of the filter screen 4. At the same time, the scraper 12 itself will also have a certain scraping effect on the surface of the filter screen 4. Through the combined action of the bristles 11 and the scraper 12, impurities blocked in the filter hole 6 can be temporarily removed, ensuring the unobstructed flow of the filter hole 6, extending the time for smooth medium passage, reducing the frequency of cleaning and maintenance required due to filter hole blockage, and enhancing the practical performance of the drilling fluid tee joint.

[0029] Filter cleaning and maintenance principles:

[0030] During prolonged use, when a large amount of impurities accumulate on the filter screen 4 and need to be cleaned, first disconnect the horizontal cylinder 1 and vertical cylinder 2 from the external connecting pipes. Then, rotate the vertical cylinder 2 counterclockwise to separate it from the horizontal cylinder 1, thereby exposing the filter screen 4 and facilitating subsequent cleaning operations. Use an external water gun to backflush and clean the filter screen 4, using high-pressure water flow to wash away the impurities remaining on the surface of the filter screen 4 and inside the filter holes 6. The operation is simple and convenient, and can effectively remove most of the accumulated impurities. The bolts 5 required to connect the filter screen 4 are equipped with caps 15 on the outside. The caps 15 wrap and protect the threaded connection of the bolts 5, preventing impurities from contacting the threaded connection of the bolts 5 and avoiding damage or rust to the threads due to impurities getting stuck. When further thorough cleaning of the filter screen 4 is required, because the threaded connection of the bolts 5 is well protected, the bolts 5 can be smoothly rotated counterclockwise to remove the filter screen 4 from the horizontal cylinder 1, facilitating a comprehensive and thorough cleaning of the filter screen 4 and ensuring that the filtration performance of the filter screen 4 is always kept in good condition.

[0031] The above embodiments are merely one of the preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but solve the same technical problem as this utility model, should be included within the scope of protection of this utility model.

Claims

1. A drilling fluid tee fitting with a built-in screen, characterized in that, include: A horizontal cylinder (1) has a vertical cylinder (2) threadedly connected to the top of its outer wall. A sealing ring (3) is abutted between the vertical cylinder (2) and the horizontal cylinder (1). A filter unit is provided inside the upper part of the horizontal cylinder (1). The filter unit includes a filter screen (4). The filter screen (4) is located inside the upper part of the horizontal cylinder (1). Multiple bolts (5) are inserted at the edge of the upper surface of the filter screen (4). The bolts (5) penetrate a part of the filter screen (4) and are threadedly connected to the horizontal cylinder (1). Multiple openings are provided on the surface of the filter screen (4). The filter screen (4) has a filter hole (6) and a rotating rod (7) rotatably connected inside. A first impeller (8) is fixedly sleeved on the upper part of the outer wall of the rotating rod (7). A second impeller (9) is fixedly connected to the bottom end of the rotating rod (7). Multiple support plates (10) are fixedly connected to the outer wall of the rotating rod (7). Multiple bristles (11) are fixedly connected to both sides of the bottom end of the support plate (10). A scraper (12) is fixedly connected to the center of the bottom end of the support plate (10). The bottom ends of the scraper (12) and the bristles (11) are in contact with the upper surface of the filter screen (4).

2. The drilling fluid tee fitting with built-in screen of claim 1, wherein, The top of the outer wall of the rotating rod (7) is provided with an opening (13).

3. The drilling fluid tee fitting with built-in screen of claim 1, wherein, The multiple support plates (10) are evenly and equidistantly distributed relative to the center point of the rotating rod (7).

4. The drilling fluid tee fitting with a built-in screen of claim 1, wherein, The center points of the first impeller (8), the rotating rod (7), and the second impeller (9) are all located on the same horizontal vertical line.

5. The drilling fluid tee fitting with a built-in screen of claim 1, wherein, A protective unit is provided above the bolt (5). The protective unit includes a cap (15), which is located above the bolt (5). The cap (15) is threadedly connected to the filter screen (4) through a ring groove (14). A collar (16) is fixedly sleeved on the lower part of the outer wall of the cap (15). A sealing ring (17) is fixedly connected to the lower surface of the collar (16). The sealing ring (17) abuts against the filter screen (4).

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