Self-sealing rotary portable combined blowout preventer

Abstract

The utility model discloses a self-sealing rotary portable combined blowout preventer, which relates to the related field of oil exploitation and comprises a short-connected casing pipe, a first seamless pipe is welded on the right side of the casing pipe, a screw thread gate valve is connected on the right side of the first seamless pipe, a second seamless pipe is welded on the top of the first seamless pipe, and the screw thread gate valve is connected on the right side of the second seamless pipe. A needle valve is mounted at the top of the second seamless pipe, and a pressure gauge is mounted at the top of the needle valve; fixing barrels are installed at the bottom of the cylinder at equal angles, and supporting plates abutting against the well wall are slidably connected into the fixing barrels. In the using process of the self-sealing rotating portable combined blowout preventer, the blowout preventer can be conveniently and rapidly assembled, the whole blowout preventer is portable, the blowout preventer is rapidly connected with a wellhead in a self-sealing rotating mode, the connecting stability is enhanced through a supporting plate, meanwhile, sealing treatment is conducted through an air bag, and the sealing effect is good. And the sealing bag is extruded to adaptively fill a tiny gap and an irregular surface at the joint to form tight fit, so that the sealing effect is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of oil extraction, specifically a self-sealing, rotating, portable combined well sealer. Background Technology

[0002] In oil and gas extraction and water well engineering, well sealing devices are key equipment used for wellhead control, preventing blowouts and ensuring operational safety. In some oil wells in the water injection edge block, water flooding and high bottom hole pressure pose a risk of blowouts, making on-site management difficult. The technical solution is to use bridge plugs to seal the well and continue oil production after sealing. However, the original production tree seal is not conducive to daily pressure recording and subsequent pressure release, so it is urgent to improve it.

[0003] To address the aforementioned deficiencies, the existing technology (Chinese patent announcement number CN211144432U, announcement date 2020-07-31) provides an oil wellhead sealing device. Since the dimensions of the wellhead and the sealing device are mostly standard parts, the dimensions of the No. 2 sealing insert and the No. 1 sealing insert can be selected according to the actual needs of the wellhead and the sealing device, allowing the No. 2 sealing insert to fit with the sealing device and the No. 1 sealing insert to fit with the wellbore. The No. 1 and No. 2 fixing seats are designed as separate units for easy connection, resulting in a reasonable structure.

[0004] In the above-mentioned scheme, when the well sealing device is used for well sealing, the well sealing device itself is connected by a flange, and the well sealing also requires multiple plugs and well holes to be connected and fixed. The installation is time-consuming and labor-intensive, and the operation is inconvenient. After being connected to the wellhead, it is sealed by a sealing gasket. However, the sealing gasket has weak flexibility and plasticity. When the pressure of the medium in the oil well is high, the sealing gasket is not enough to evenly distribute the pressure, resulting in local pressure concentration and sealing failure. Utility Model Content

[0005] The purpose of this invention is to provide a self-sealing rotating portable combined well sealer to solve the problems mentioned in the background art. In the process of using the existing portable combined well sealer, the well sealer itself is connected by a flange, and the well sealing also requires multiple plugs and well holes to be connected and fixed. The installation is time-consuming and labor-intensive, and the operation is inconvenient. After being connected to the wellhead, it is sealed by a sealing gasket. However, the sealing gasket has weak flexibility and plasticity. When the pressure of the medium in the oil well is high, the sealing gasket is not enough to evenly distribute the pressure, resulting in local pressure concentration and sealing failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-sealing rotating portable combined well sealing device, comprising a short-connected casing, a first seamless tube welded to the right side of the casing, a threaded gate valve connected to the right side of the first seamless tube, a second seamless tube welded to the top of the first seamless tube, a needle valve installed at the top of the second seamless tube, a pressure gauge installed at the top of the needle valve, a first thread for connection to the wellhead provided on the outer bottom of the casing, a second thread for connection to the bottom of the threaded gate valve provided on the outer right side of the first seamless tube, a cylinder fixed in the middle of the inner side of the casing, a fixing cylinder installed at an equal angle at the bottom of the cylinder, a support plate slidably connected in the fixing cylinder to abut against the well wall, and a sealing bladder tightly fitting the well wall provided at the bottom of the casing.

[0007] Furthermore, the casing is self-sealing and rotatably connected to the wellhead via a first thread, and the casing is quickly assembled with a threaded gate valve via a second thread. The pressure gauge displays the pressure in the well sealer.

[0008] Furthermore, a rotating rod is connected through the top of the sleeve, and the bottom of the rotating rod extends to the bottom of the inner side of the cylinder. The bottom of the rotating rod is connected to the screw through a bevel tooth connector.

[0009] Furthermore, the screws are rotatably connected to the inside of the fixed cylinder, and the screws are threadedly connected to a support plate. The support plate forms a telescopic sliding structure with the screws and the fixed cylinder.

[0010] Furthermore, the support plate is configured as a "T" shape when viewed from above, and the ends of the support plate are configured as arc-shaped structures.

[0011] Furthermore, a third thread is provided on the outer side of the top of the rotating rod, and a pressure plate is connected to the outer thread of the third thread. The pressure plate is slidably connected to the inner cavity through the vertical rod, and the inner cavity is opened on the inner side of the top of the sleeve.

[0012] Furthermore, an air reservoir is installed at the bottom inner side of the inner cavity, and the pressure plate presses against the air reservoir. The pressure plate is connected to the sealing bladder through a connecting pipe, and the sealing bladder is configured as a circular ring structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This self-sealing, rotating, portable combination wellhead sealer is easy to assemble and carry. It connects quickly to the wellhead via self-sealing rotation, and the connection stability is enhanced by a support plate. It is also sealed by an air bladder. When compressed, the air bladder automatically fills the tiny gaps and irregular surfaces at the joint, forming a tight fit and ensuring a good seal.

[0015] 1. Furthermore, the casing is quickly assembled and fixed to the threaded gate valve via the second thread, and then the bottom of the casing is connected to the wellhead via the first thread for self-sealing rotation connection. The operation is convenient and fast. When the bottom pressure in the well is high, water vapor enters the casing, and the pressure gauge on the top of the needle valve will display the current pressure. The operator opens the threaded gate valve according to the parameters of the pressure gauge to discharge the high-pressure water vapor.

[0016] 2. Further, during the well sealing process, while the casing is connected to the well, the rotating rod on the casing is rotated. After the rotating rod rotates, it drives the screw at the bottom of the cylinder to rotate synchronously through the bevel gear connector. After the screw rotates, it will drive the support plate to extend out of the fixed cylinder, and then contact and fix it against the well wall of the well, thereby strengthening the stability of the connection between the well sealer and the well.

[0017] 3. Furthermore, when the rotating rod rotates, it will drive the third thread to rotate synchronously. After the third thread rotates, it will drive the pressure plate to move down in the inner cavity, thereby squeezing the gas storage bag. After the gas storage bag is compressed, the gas inside will be transported to the sealing bag through the connecting pipe. After the sealing bag expands, it will seal the connection between the well sealer and the oil well, improve the sealing performance of the connection, and prevent leakage.

[0018] 4. Furthermore, due to the elasticity of the sealing bladder, it can deform with changes in pressure, always maintaining a good sealing condition. When the oil well is under high pressure, the sealing bladder can effectively withstand water pressure impact, preventing gaps from forming at the joint due to excessive pressure, enhancing the reliability of the seal, and reducing the risk of leakage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of the well sealer of this utility model;

[0021] Figure 3 This is a schematic diagram of the front section structure of the sleeve of this utility model;

[0022] Figure 4 This is a bottom view of the connection structure of the cylinder, fixed tube, and support plate of this utility model;

[0023] Figure 5 This is a top view schematic diagram of the distribution of the rotating rod, the third thread, and the screw of this utility model;

[0024] Figure 6 This is a schematic diagram of the connection structure of the pressure plate, air storage bag and sealing bag of this utility model.

[0025] In the diagram: 1. Sleeve; 2. First seamless tube; 3. Threaded gate valve; 4. Second seamless tube; 5. Needle valve; 6. Pressure gauge; 7. First thread; 8. Second thread; 9. Cylindrical tube; 10. Fixed cylinder; 11. Support plate; 12. Rotating rod; 13. Screw; 14. Third thread; 15. Pressure plate; 16. Inner cavity; 17. Air reservoir; 18. Connecting tube; 19. Sealing bladder. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figures 1-2 The present invention provides the following technical solution: a self-sealing rotating portable combined well sealing device, comprising a short-connected casing 1, a first seamless tube 2 welded to the right side of the casing 1, a threaded gate valve 3 connected to the right side of the first seamless tube 2, a second seamless tube 4 welded to the top of the first seamless tube 2, a needle valve 5 installed on the top of the second seamless tube 4, a pressure gauge 6 installed on the top of the needle valve 5, a first thread 7 for connecting to the wellhead provided on the outer side of the bottom of the casing 1, a second thread 8 for connecting to the bottom of the threaded gate valve 3 provided on the outer side of the right side of the first seamless tube 2, a cylinder 9 fixed in the middle of the inner side of the casing 1, a fixing cylinder 10 installed at equal angles at the bottom of the cylinder 9, a support plate 11 slidably connected in the fixing cylinder 10 to abut against the well wall, and a sealing bladder 19 tightly fitted to the well wall provided at the bottom of the casing 1.

[0028] In use, casing 1 is quickly assembled and fixed to threaded gate valve 3 via the second thread 8, and then the bottom of casing 1 is connected to the wellhead via the first thread 7 for self-sealing rotation connection. The operation is convenient and quick. When the bottom pressure in the well is high, water vapor enters casing 1, and the pressure gauge 6 on the top of needle valve 5 will display the current pressure. The operator opens threaded gate valve 3 according to the parameters of pressure gauge 6 to discharge high-pressure water vapor. When sealing the well, when casing 1 is connected to the oil well, the support plate 11 in the fixed cylinder 10 will also extend synchronously and press against the well wall to improve the connection stability of the well sealer. The sealing bladder 19 can enhance the sealing of the connection and prevent leakage. Example 2:

[0029] Based on Embodiment 1, a rotating rod 12 and a screw 13 are also disclosed. Please refer to [reference needed]. Figures 3-5As shown, its specific structure is as follows: the casing 1 is connected to the wellhead via the first thread 7 for self-sealing rotation; the casing 1 is quickly assembled with the threaded gate valve 3 via the second thread 8; the pressure gauge 6 displays the pressure in the well sealer; a rotating rod 12 is connected through the top of the casing 1; the bottom of the rotating rod 12 extends to the bottom of the inner side of the cylinder 9; the bottom of the rotating rod 12 is connected to the screw 13 via a conical tooth connector; the screw 13 is rotatably connected to the inside of the fixed cylinder 10; a support plate 11 is threadedly connected to the outside of the screw 13; the support plate 11 forms a telescopic sliding structure with the screw 13 and the fixed cylinder 10; the support plate 11 is set as a "T" shaped structure when viewed from above; and the end of the support plate 11 is set as an arc-shaped structure.

[0030] During use, rotating the rotating rod 12 on the casing 1 causes the screw 13 at the bottom of the cylinder 9 to rotate synchronously through the bevel gear connector. After the screw 13 rotates, it will cause the support plate 11 to extend out of the fixed cylinder 10 and then contact and fix with the well wall of the oil well, thereby strengthening the stability of the connection between the well sealer and the oil well. Example 3:

[0031] Based on Embodiment 2, a pressure plate 15 and an air reservoir 17 are also disclosed. Please refer to [link / reference]. Figure 3 and Figure 6 As shown, its specific structure is as follows: A third thread 14 is provided on the outer side of the top of the rotating rod 12. A pressure plate 15 is threadedly connected to the outer side of the third thread 14. The pressure plate 15 is slidably connected to the inner cavity 16 through the vertical rod. The inner cavity 16 is opened on the inner side of the top of the sleeve 1. An air storage bag 17 is installed at the bottom of the inner side of the inner cavity 16. The pressure plate 15 and the air storage bag 17 are pressed and abutted. The pressure plate 15 is connected to the sealing bag 19 through the connecting pipe 18. The sealing bag 19 is set as a ring structure.

[0032] During use, when the rotating rod 12 rotates, it will drive the third thread 14 to rotate synchronously. After the third thread 14 rotates, it will drive the pressure plate 15 to move down in the inner cavity 16, thereby squeezing the gas storage bag 17. After the gas storage bag 17 is compressed, the gas inside is transported to the sealing bag 19 through the connecting pipe 18. After the sealing bag 19 expands, it will seal the well sealer and the oil well, improve the sealing performance of the connection, and prevent leakage.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-sealing rotary portable combined well sealer, comprising a short-connected casing (1), a first seamless tube (2) welded to the right side of the casing (1), a threaded gate valve (3) connected to the right side of the first seamless tube (2), a second seamless tube (4) welded to the top of the first seamless tube (2), a needle valve (5) installed on the top of the second seamless tube (4), and a pressure gauge (6) installed on the top of the needle valve (5). Its features are: The casing (1) has a first thread (7) for connecting to the wellhead on the outer bottom side, and the first seamless pipe (2) has a second thread (8) for connecting to the bottom of the threaded gate valve (3) on the outer right side side. A cylinder (9) is fixed in the middle of the inner side of the casing (1). A fixed cylinder (10) is installed at the bottom of the cylinder (9) at equal angles. A support plate (11) that abuts against the well wall is slidably connected in the fixed cylinder (10). A sealing bladder (19) that fits tightly against the well wall is provided at the bottom of the casing (1).

2. The portable combined well-sealing device with self-sealing rotation according to claim 1, characterized in that: The casing (1) is connected to the wellhead via a first thread (7) and is quickly assembled with a threaded gate valve (3) via a second thread (8). The pressure gauge (6) displays the pressure in the well sealer.

3. A portable combined well-sealing device with self-sealing rotation according to claim 2, characterized in that: The top of the sleeve (1) is connected to a rotating rod (12), the bottom of the rotating rod (12) extends to the bottom of the inner side of the cylinder (9), and the bottom of the rotating rod (12) is connected to the screw (13) through a bevel tooth connector.

4. A portable combined well-sealing device with self-sealing rotation according to claim 3, characterized in that: The screws (13) are rotatably connected to the inside of the fixed cylinder (10), and the screws (13) are threadedly connected to the support plate (11). The support plate (11) forms a telescopic sliding structure between the screws (13) and the fixed cylinder (10).

5. A portable combined well-sealing device with self-sealing rotation according to claim 4, characterized in that: The support plate (11) is configured as a "T" shaped structure when viewed from above, and the ends of the support plate (11) are configured as arc-shaped structures.

6. A self-sealing, rotating, portable combined well-sealing device according to claim 5, characterized in that: The top outer side of the rotating rod (12) is provided with a third thread (14), and the outer thread of the third thread (14) is connected to a pressure plate (15). The pressure plate (15) is slidably connected to the inner cavity (16) through the vertical rod. The inner cavity (16) is opened on the top inner side of the sleeve (1).

7. A portable combined well-sealing device with self-sealing rotation according to claim 6, characterized in that: An air reservoir (17) is installed at the bottom of the inner side of the inner cavity (16). The pressure plate (15) presses against the air reservoir (17). The pressure plate (15) is connected to the sealing bladder (19) through the connecting pipe (18). The sealing bladder (19) is configured as a ring structure.

Images