Drill rod water stopping device

Abstract

The utility model provides a drill rod water stopping device which comprises a supporting piece screwed in a drill rod, the supporting piece is provided with a water tank extending in the axial direction, the supporting piece is sleeved with a water stopping disc, and the water stopping disc can be pushed by backflow water to move to the position above the water tank and block the drill rod. The conduction state of the inner cavity of the drill rod is controlled through movement of the water stop disc relative to the water tank, the water stop structure is simplified, and the reliability of plugging is improved.

Description

Technical Field

[0001] This application relates to the field of drill pipe technology, and in particular to a drill pipe water-stopping device. Background Technology

[0002] Drill pipes are specialized tools for underground resource extraction. To prevent backflow of water supply within the drill pipe during operations, a water-stopping device is typically installed inside. Patent CN221879316U discloses a drill pipe water-stopping device that uses water flow to move a solid ball to block a passive flow-blocking mechanism, thereby preventing downhole water backflow. However, in practice, this method relies on the movement of the solid ball to achieve the passive flow-blocking mechanism, resulting in a complex structure and poor reliability. Therefore, the inventors have proposed a drill pipe water-stopping device. Utility Model Content

[0003] This application provides a drill pipe water-stopping device with a simplified structure.

[0004] The technical solution of this application is as follows:

[0005] This application provides a drill pipe water-stopping device, which includes a support member screwed into the drill pipe. The support member has a water groove extending axially, and a water-stopping disc is sleeved on the support member. The water-stopping disc can move above the water groove under the push of the backflow water and seal the drill pipe.

[0006] The technical solution of this application controls the conduction state of the drill rod cavity by moving the water-stopping disc relative to the water tank, which has a simplified water-stopping structure and improves the reliability of the sealing.

[0007] In some implementations, the support is arranged coaxially with the drill pipe.

[0008] In some implementations, the water tank is arranged along the diameter of the support.

[0009] In some implementations, the sidewall of the support member is provided with a lug that can be screwed onto the drill pipe.

[0010] In some implementations, the ear plates are evenly distributed along the circumference of the support.

[0011] In some implementations, the ear plates are arranged symmetrically on both sides of the water tank.

[0012] In some implementations, a baffle is screwed onto the top of the support.

[0013] In some implementations, the baffle is constructed as a circle arranged coaxially with the waterstop plate.

[0014] In some implementations, a sealing ring is fixed to the baffle for pressing against the waterstop plate.

[0015] In some implementations, the waterstop plate is provided with a groove for engaging the sealing ring. Attached Figure Description

[0016] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and are not intended to limit the scope of this application. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of an existing drill pipe water-stopping device;

[0018] Figure 2 This is a schematic diagram of a drill pipe water-stopping device according to an embodiment of this application;

[0019] Figure 3 This is an exploded view of the drill pipe water-stopping device according to an embodiment of this application;

[0020] Figure label:

[0021] 10. Drill pipe;

[0022] 20. Support component; 21. Water tank; 22. Ear plate;

[0023] 30. Waterstop plate; 31. Card slot;

[0024] 40. Baffle; 41. Sealing ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0026] In related technologies, drill pipes are specialized tools for underground resource extraction. To prevent backflow of water supply within the drill pipe during operations, a water-stopping device is typically installed inside the drill pipe. Please refer to [link to relevant documentation]. Figure 1 Patent CN221879316U discloses a drill pipe water-stopping device that uses water flow to move a solid ball to block a passive flow-blocking mechanism, thereby preventing downhole water backflow. However, in practice, the above-mentioned device relies on the movement of the solid ball to achieve the blocking of the passive flow-blocking mechanism, resulting in a relatively complex structure and poor reliability.

[0027] This embodiment provides a drill pipe water-stopping device with a simplified structure.

[0028] Please see Figures 2-3In this embodiment, a drill rod water-stopping device includes a support member 20 screwed inside the drill rod 10. The support member 20 has a water groove 21 extending along the axial direction. A water-stopping disc 30 is sleeved on the support member 20. The water-stopping disc 30 can move above the water groove 21 under the push of the backflow water and block the drill rod 10.

[0029] The technical solution of this embodiment controls the conduction state of the inner cavity of the drill rod 10 by moving the water-stopping plate 30 relative to the water tank 21, which has a simplified water-stopping structure and improves the reliability of the sealing.

[0030] In this embodiment, the support member 20 is constructed as a cylinder and is arranged at the axis of the drill rod 10. Ear plates 22 are fixedly connected to the side wall of the support member 20 and are evenly distributed along the circumference of the support member 20. The ear plates 22 are threadedly connected to the inner wall of the drill rod 10, thereby fixing the support member 20 as a whole inside the drill rod 10. A water groove 21 is provided on the lower end face of the support member 20. The water groove 21 is arranged along the diameter direction of the support member 20 and extends upward along the axis of the support member 20. The two ear plates 22 are symmetrically arranged on both sides of the water groove 21.

[0031] In addition, a baffle 40 is screwed onto the upper end face of the support member 20. The baffle 40 is constructed to be circular, and the outer diameter of the baffle 40 is larger than the outer diameter of the support member 20. An annular sealing ring 41 is fixedly connected to the lower surface of the baffle 40. The sealing ring 41 is coaxially arranged with the support member 20.

[0032] In this embodiment, the water-stopping disc 30 is constructed as a disc with a central hole. The support member 20 passes through the central hole of the water-stopping disc 30. The water-stopping disc 30 is slidably sleeved on the outside of the support member 20, and the water-stopping disc 30 and the support member 20 are arranged coaxially. The outer peripheral surface of the water-stopping disc 30 is in contact with the inner wall of the drill rod 10, and the inner peripheral surface of the water-stopping disc 30 is in contact with the outer wall of the support member 20. A groove 31 corresponding to the sealing ring 41 is provided on the upper surface of the water-stopping disc 30, and the sealing ring 41 can be engaged in the groove 31.

[0033] It should be noted that the water-stopping plate 30 is entirely confined between the baffle 40 and the ear plate 22. The water-stopping plate 30 can slide up and down along the support member 20. The water-stopping plate 30 divides the inner cavity of the drill rod 10 into upper and lower parts along the axis. When the water-stopping plate 30 is located on the water trough 21, the water trough 21 connects the upper and lower inner cavities of the drill rod 10. However, when the water-stopping plate 30 is completely above the water trough 21, that is, the water trough 21 is entirely below the water-stopping plate 30, the water-stopping plate 30 separates the upper and lower inner cavities of the drill rod 10, and the backflow water cannot flow from below the water-stopping plate 30 to above.

[0034] It should be understood that when the water-stop plate 30 located above the water tank 21 continues to move upward under the push of the backflow water, the sealing ring 41 on the baffle 40 will press against the groove 31 on the water-stop plate 30, which can further improve the sealing effect of the water-stop plate 30.

[0035] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A drill pipe water stop device, characterized by, The device includes a support member screwed into the drill rod, the support member having a water groove extending axially, and a water-stopping disc fitted on the support member, the water-stopping disc being able to move above the prime number water groove under the push of the backflow water and seal the drill rod.

2. The drill pipe water-stopping device as described in claim 1, characterized in that, The support member is arranged coaxially with the drill pipe.

3. The drill pipe water-stopping device as described in claim 1, characterized in that, The water tank is arranged along the diameter of the support member.

4. The drill pipe water-stopping device as described in claim 1, characterized in that, The side wall of the support member is provided with a lug that can be screwed into the drill rod.

5. The drill pipe water-stopping device as described in claim 4, characterized in that, The ear plates are evenly distributed along the circumference of the support member.

6. The drill pipe water-stopping device as described in claim 5, characterized in that, The ear plates are arranged symmetrically on both sides of the water tank.

7. The drill pipe water-stopping device as described in claim 1, characterized in that, A baffle is screwed onto the top of the support member.

8. The drill pipe water-stopping device as described in claim 7, characterized in that, The baffle is configured as a circle arranged coaxially with the waterstop plate.

9. The drill pipe water-stopping device as described in claim 7, characterized in that, A sealing ring for pressing against the waterstop plate is fixed to the baffle plate.

10. The drill pipe water-stopping device as described in claim 9, characterized in that, The water-stop plate is provided with a groove for engaging the sealing ring.

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