A pressure containment device for use in plugging leaks in drilling fluids

Abstract

The utility model relates to the field of petroleum engineering and drilling technology, especially to a pressure containment plugging device for drilling fluid plugging. The utility model provides a pressure containment plugging device for drilling fluid plugging which can adjust and extend the telescopic plate and the extension plate according to the size of the drilling mouth, is convenient for adapting to different use demands and is flexible and convenient to use. The pressure containment plugging device for drilling fluid plugging comprises a pipeline and a control valve core, and the control valve core is slidably connected inside the pipeline. The utility model drives the telescopic plate to move outward synchronously by starting the electric telescopic rod, makes the inner plate slide between the telescopic plates, drives the extension plate to move outward at the same time, makes the extension plate slide between the extension plates, extends the telescopic plate and the extension plate, and achieves the effect that the telescopic plate and the extension plate can be adjusted and extended according to the size of the drilling mouth, are convenient for adapting to different use demands and are flexible and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of petroleum engineering and drilling technology, and in particular to a pressure-bearing plugging device for drilling fluid plugging. Background Technology

[0002] In drilling projects for oil, gas, and geological exploration, well leakage is a common and complex problem affecting construction safety and efficiency, accounting for approximately 15%-25% of drilling accidents. Well leakage not only leads to a large loss of drilling fluid and increases non-productive time, but can also cause secondary disasters such as wellbore instability, formation pressure imbalance, and even well blowouts, resulting in huge economic losses and safety risks.

[0003] Existing pressure-bearing plugging devices for drilling fluid plugging typically involve workers injecting plugging mud into the wellbore using the device. However, before plugging, workers need to use a measuring device to measure the wellhead size, remove the measuring device, and then select a pressure-bearing plugging device of appropriate size to install into the well. This method is cumbersome and inconvenient, as it makes it difficult to adjust and expand the pressure-bearing plugging device according to the wellhead size, resulting in a lack of flexibility and inconvenience.

[0004] Therefore, it is necessary to design a pressure-bearing plugging device for drilling fluid plugging that can adjust and expand the telescopic plate and extension plate according to the size of the wellhead, so as to adapt to different usage needs and be flexible and convenient to use. Utility Model Content

[0005] To overcome the shortcomings of the cumbersome process of measuring the wellhead size using a measuring device, removing the measuring device, and then selecting a suitable pressure-bearing plugging device to install in the well, which is inconvenient and makes it difficult to adjust and expand the pressure-bearing plugging device according to the wellhead size, this utility model provides a pressure-bearing plugging device for drilling fluid plugging that allows for adjustment and expansion of the telescopic plate and extension plate according to the wellhead size, making it easy to adapt to different usage needs and providing flexibility and convenience in use.

[0006] A pressure-bearing plugging device for drilling fluid plugging includes a pipe, a control valve core, a first spring, a connecting pad, a collection component, and an expansion component. The control valve core is slidably connected inside the pipe. Both sides of the control valve core have internal flow ports. The first spring connects the control valve core to the pipe. Both sides of the control valve core have connecting pads connected to their inner sides. The lower part of the pipe is equipped with a collection component that facilitates the collection and removal of non-metallic balls and small steel balls. The pipe is equipped with an expansion component that can be adjusted and expanded according to the size of the wellhead.

[0007] To further clarify, all connecting pads are hemispherical in shape.

[0008] To further explain, the collection assembly includes a ball catcher, a support block, a second spring, and a guide rod. Two guide rods are connected to the inner side of the lower part of the pipe. Support blocks are slidably connected to each guide rod. A ball catcher is connected between the support blocks. A second spring is connected between each support block and the adjacent guide rod.

[0009] Further explanation: It also includes an expansion assembly, which includes a telescopic plate, an inner plate, an electric telescopic rod, a telescopic tube, a disc, an extension plate, and an extension plate. Multiple electric telescopic rods are connected to the lower part of the pipe. Each electric telescopic rod is electrically connected to the processor via a control module. A telescopic plate is connected to the telescopic end of each electric telescopic rod. An inner plate is slidably connected between adjacent telescopic plates. Telescopic tubes are connected to both the left and right sides of the pipe, with the other end of each telescopic tube connected to its adjacent telescopic plate. A disc is connected to the inner side of the pipe, and a control valve core is slidably connected to the disc. Extension plates are connected to the upper part of each telescopic plate, and these extension plates contact and cooperate with the disc. An extension plate is connected between adjacent extension plates.

[0010] To further clarify, each telescopic pipe has an outflow port.

[0011] To further clarify, all extension plates are arc-shaped structures.

[0012] The beneficial effects of this utility model are as follows: 1. By activating the electric telescopic rod, the telescopic plate moves outward synchronously, causing the inner plate to slide between the telescopic plates. At the same time, the extension plate moves outward, causing the extension plate to slide between the extension plates. This expands and extends the telescopic plate and the extension plate, achieving the effect of being able to adjust and expand the telescopic plate and the extension plate according to the size of the wellhead, which is convenient to adapt to different usage needs and is flexible and convenient to use.

[0013] 2. This utility model achieves the effect of conveniently collecting and removing non-metallic balls and small steel balls by moving the ball catcher downward, causing the support block to move on the guide rod, stretching the second spring, and then taking out the non-metallic ball and small steel ball. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the first spring and inner plate components of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the support block and the second spring of this utility model.

[0017] Figure 4 This is a structural schematic diagram of the connecting pad and other components of this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the inner plate and extension plate of this utility model.

[0019] The markings in the attached diagram are as follows: 1: Pipe, 2: Telescopic plate, 3: Outflow port, 4: Inner plate, 5: Control valve core, 6: Inflow port, 7: First spring, 8: Electric telescopic rod, 9: Telescopic tube, 10: Ball catcher, 11: Support block, 12: Second spring, 13: Guide rod, 14: Connecting pad, 15: Disc, 16: Extension plate, 17: Extension plate. Detailed Implementation

[0020] The present invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0021] A pressure-bearing plugging device for drilling fluid plugging, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a pipe 1, a control valve core 5, a first spring 7, a connecting pad 14, a collection assembly, and an expansion assembly. The control valve core 5 is slidably connected inside the pipe 1. The control valve core 5 has internal flow ports 6 on both the left and right sides. The first spring 7 connects the control valve core 5 to the pipe 1. The connecting pads 14 are connected to the inner sides of both the left and right sides of the control valve core 5. The connecting pads 14 are all hemispherical structures. The collection assembly is provided at the lower part of the pipe 1, and the expansion assembly is provided on the pipe 1.

[0022] like Figure 2 and Figure 3 As shown, the collecting assembly includes a ball catcher 10, a support block 11, a second spring 12, and a guide rod 13. The lower inner side of the pipe 1 is connected to two guide rods 13, and each guide rod 13 is slidably connected to a support block 11. The ball catcher 10 is connected between the support blocks 11, and each support block 11 is connected to the adjacent guide rod 13 by a second spring 12.

[0023] like Figure 1 , Figure 2 and Figure 5As shown, it also includes an expansion assembly, which includes a telescopic plate 2, an inner plate 4, an electric telescopic rod 8, a telescopic tube 9, a disc 15, an extension plate 16, and an extension plate 17. The lower part of the pipe 1 is connected to four electric telescopic rods 8, each of which is electrically connected to the processor via a control module. Each telescopic rod 8 has a telescopic plate 2 connected to its telescopic end. An inner plate 4 is slidably connected between two adjacent telescopic plates 2. Both sides of the pipe 1 are connected to telescopic tubes 9, each with an outflow port 3. The other end of each telescopic tube 9 is connected to its adjacent telescopic plate 2. A disc 15 is connected to the inside of the pipe 1, and a control valve core 5 is slidably connected to the disc 15. An extension plate 16 is connected to the upper side of each telescopic plate 2, and each extension plate 16 contacts and engages with the disc 15. An extension plate 17 is connected between two adjacent extension plates 16. The extension plates 17 are all arc-shaped structures for easy expansion.

[0024] When using this device, first install pipe 1 inside the wellhead, then put the non-metallic ball into pipe 1. When the non-metallic ball reaches between the connecting pads 14, it blocks the inner hole of the control valve core 5. Then, inject plugging mud into pipe 1. Under the action of the mud, the control valve core 5 moves downward, and the first spring 7 is compressed and contracted, so that the inner outlet 6 is aligned with the telescopic pipe 9, and the outer outlet 3 on the telescopic pipe 9 is opened, allowing the plugging mud to be discharged through the telescopic pipe 9 to begin the sealing process. After the plugging is completed, put two small steel balls into pipe 1. The small steel balls reach the inner outlet 6 with the mud, blocking the inner outlets 6 on both sides. Under the action of the mud pressure, the non-metallic ball is squeezed and deformed and moves downward, so that the non-metallic ball... When the ball falls into the ball catcher 10, the small steel ball also falls off the inner outlet 6 and onto the ball catcher 10. At this time, the first spring 7 returns to its original state, driving the control valve core 5 to move and reset. When this device needs to be installed in different wellheads, the electric telescopic rod 8 can be activated to drive the telescopic plate 2 to move outward synchronously, so that the inner plate 4 slides between the telescopic plates 2, driving the telescopic tube 9 to extend, and at the same time driving the extension plate 16 to move outward, so that the extension plate 17 slides between the extension plates 16, expanding and extending the telescopic plate 2 and the extension plate 16. Thus, the telescopic plate 2 and the extension plate 16 can be adjusted and expanded according to the size of the wellhead, which is convenient to adapt to different usage needs and is flexible and convenient to use.

[0025] When it is necessary to remove the non-metallic ball and small steel ball from the ball catcher 10, the ball catcher 10 can be moved downwards, causing the support block 11 to move on the guide rod 13, stretching the second spring 12, and then removing the non-metallic ball and small steel ball. This makes it convenient to collect and remove the non-metallic ball and small steel ball, and is easy to use. After the non-metallic ball and small steel ball are removed, the ball catcher 10 is released, the second spring 12 returns to its original state, and causes the support block 11 to move upwards to reset.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pressure-bearing plugging device for drilling fluid plugging, characterized in that: It includes a pipe (1), a control valve core (5), a first spring (7), a connecting pad (14), a collection component and an expansion component. The control valve core (5) is slidably connected inside the pipe (1). The control valve core (5) has an internal flow port (6) on both the left and right sides. The first spring (7) is connected between the control valve core (5) and the pipe (1). The connecting pad (14) is connected to the inner side of both the left and right sides of the control valve core (5). The lower part of the pipe (1) is provided with a collection component that can easily collect and remove non-metallic balls and small steel balls. The pipe (1) is provided with an expansion component that can be adjusted and expanded according to the size of the wellhead.

2. A pressure-bearing plugging device for drilling fluid plugging according to claim 1, characterized in that: All connecting pads (14) are hemispherical structures.

3. A pressure-bearing plugging device for drilling fluid plugging according to claim 1, characterized in that: The collection assembly includes a ball catcher (10), a support block (11), a second spring (12), and a guide rod (13). The lower inner side of the pipe (1) is connected to two guide rods (13), and a support block (11) is slidably connected to each guide rod (13). The ball catcher (10) is connected between the support blocks (11), and a second spring (12) is connected between each support block (11) and the adjacent guide rod (13).

4. A pressure-bearing plugging device for drilling fluid plugging according to claim 1, characterized in that: It also includes an extension component, which includes a telescopic plate (2), an inner plate (4), an electric telescopic rod (8), a telescopic pipe (9), a disc (15), an extension plate (16), and an extension plate (17). The lower part of the pipe (1) is connected to multiple electric telescopic rods (8). The electric telescopic rods (8) are all electrically connected to the processor through the control module. The telescopic plates (2) are all connected to the telescopic ends of the electric telescopic rods (8). The inner plate (4) is slidably connected between two adjacent telescopic plates (2). The left and right sides of the pipe (1) are connected to telescopic pipes (9). The other end of the telescopic pipes (9) is connected to the adjacent telescopic plates (2). The disc (15) is connected to the inside of the pipe (1). The control valve core (5) is slidably connected to the disc (15). The extension plate (16) is connected to the upper side of the telescopic plate (2). The extension plate (16) is in contact with the disc (15). The extension plate (17) is connected between two adjacent extension plates (16).

5. A pressure-bearing plugging device for drilling fluid plugging according to claim 4, characterized in that: Each of the telescopic pipes (9) has an outflow port (3).

6. A pressure-bearing plugging device for drilling fluid plugging according to claim 4, characterized in that: The extension plates (17) are all arc-shaped structures.

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