A type of umbrella cone retrieval device

Abstract

This application provides a parasol cone retrieval device, including a parasol cone sleeved on the outside of a male cone. The male cone has a flange at its end, and an annular groove on its end face. A positioning ring is screwed into the annular groove. A connecting plate is provided at the end of the parasol cone, passing through the flange and screwing into the positioning ring. In this application, the positioning ring fixes the parasol cone and the male cone together. The larger end of the parasol cone guides the fallen drill rod to move towards the axis of the borehole. After the fallen drill rod is straightened, it aligns with the male cone, enabling rapid connection and improving retrieval efficiency.

Description

Technical Field

[0001] This application relates to the field of drilling technology, and in particular to a cone retrieval device. Background Technology

[0002] During geological drilling, drill pipes may break. The usual method of retrieval is to use a drill bit. However, if the broken drill pipe is close to the borehole wall, the drill bit cannot quickly connect with the drill pipe, wasting a lot of retrieval time and resulting in low retrieval efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a cone-shaped retrieval device for straightening drill pipes that are attached to the wall.

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

[0005] This application provides a parachute cone retrieval device, including a parachute cone sleeved outside a male cone. The male cone has a flange at its end, and the end face of the flange has an annular groove. A positioning ring is screwed into the annular groove. The end of the parachute cone has a connecting plate, which passes through the flange and screws into the positioning ring.

[0006] Using the technical solution of this application, the positioning ring fixes the umbrella cone and the male cone in place. The larger end of the umbrella cone guides the fallen drill rod to move towards the axis of the borehole. After the fallen drill rod is straightened, it is aligned with the male cone, which can quickly complete the connection with the male cone and improve the salvage efficiency.

[0007] In some implementations, the larger end of the umbrella cone is positioned on the side of the smaller end of the male cone.

[0008] In some implementations, the outer diameter of the larger end of the umbrella cone is equal to the diameter of the borehole.

[0009] In some implementations, the inner diameter of the smaller end of the umbrella cone is equal to the outer diameter of the dropped drill rod.

[0010] In some implementations, the flange has a slot for the connecting plate to pass through.

[0011] In some implementations, the slot is constructed as an arc shape that fits the shape of the connecting plate.

[0012] In some implementations, the slot is located on the inner wall of the annular groove.

[0013] In some implementations, the slots are evenly distributed along the circumference of the annular groove.

[0014] In some implementations, the annular groove and the male cone are arranged coaxially.

[0015] In some implementations, the inner wall of the positioning ring is threadedly connected to both the inner wall of the ring groove and the outer wall of the connecting plate. 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 umbrella cone retrieval device according to an embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of the umbrella cone retrieval device according to an embodiment of this application;

[0019] Figure label:

[0020] 10. Male taper; 11. Smaller end; 12. Flange; 13. Annular groove; 14. Slot; 15. Locating ring; 16. Limiting groove;

[0021] 20. Umbrella cone; 21. Larger end; 22. Connecting plate;

[0022] 30. Drilling;

[0023] 40. The fallen drill rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application 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.

[0025] During geological drilling, drill pipes may break. The usual method of retrieval is to use a drill bit. However, if the broken drill pipe is close to the borehole wall, the drill bit cannot quickly connect with the drill pipe, wasting a lot of retrieval time and resulting in low retrieval efficiency.

[0026] In view of this, the purpose of this embodiment is to provide an umbrella cone retrieval device to straighten drill rods that are attached to the wall.

[0027] Please see Figures 1-2 In this embodiment, a parachute cone retrieval device includes a parachute cone 20 sleeved on the outside of a male cone 10. The end of the male cone 10 is provided with a flange 12, and the end face of the flange 12 is provided with an annular groove 13. A positioning ring 15 is screwed into the annular groove 13. The end of the parachute cone 20 is provided with a connecting plate 22. The connecting plate 22 passes through the flange 12 and is screwed into the positioning ring 15.

[0028] Using the technical solution of this embodiment, the positioning ring 15 fixes the umbrella cone 20 and the male cone 10 in place. The larger end 21 of the umbrella cone 20 guides the fallen drill rod 40 to move toward the axis of the borehole 30. After the fallen drill rod 40 is straightened, it is aligned with the male cone 10, which can quickly complete the connection with the male cone 10 and improve the salvage efficiency.

[0029] In this embodiment, a flange 12 is welded to the end of the male cone 10. The flange 12 is constructed as a disc arranged coaxially with the male cone 10. The flange 12 is used to fix the male cone 10 and the drill rod used for retrieval, and the drill rod used for retrieval will drive the male cone 10 to rotate synchronously.

[0030] In addition, an annular groove 13 is provided on the mating surface of flange 12, and the annular groove 13 is coaxially arranged with male cone 10. The annular groove 13 is a circular blind groove. An arc-shaped retaining groove 14 is provided on the inner side wall of the annular groove 13. The retaining groove 14 is evenly distributed along the circumference of the annular groove 13, and the retaining groove 14 is coaxially arranged with the annular groove 13. The retaining groove 14 penetrates flange 12 and is used to insert the connecting plate 22 on umbrella cone 20.

[0031] In addition, a positioning ring 15 is screwed into the inside of the annular groove 13. The inner wall of the positioning ring 15 is threaded to the inner side wall of the annular groove 13. The connecting plate 22 on the umbrella cone 20 is snapped into the inside of the slot 14. The outer side wall of the connecting plate 22 is also threaded to the inner wall of the positioning ring 15. The threads on the outer wall of the connecting plate 22 and the threads on the inner side wall of the annular groove 13 can form a complete thread after they are mated.

[0032] It should be noted that, in order to facilitate the disassembly and assembly of the positioning ring 15, a limiting groove 16 is provided on the outer edge of the positioning ring 15, and two limiting grooves 16 are evenly arranged along the circumference of the positioning ring 15. The limiting groove 16 is used to insert disassembly tools (such as screwdrivers), so that even if the positioning ring 15 is moved into the ring groove 13, it can still be quickly disassembled.

[0033] In this embodiment, the umbrella cone 20 includes a cylindrical section and a larger end 21. The inner diameter of the cylindrical section is equal to the outer diameter of the thicker section of the umbrella cone 10. A connecting plate 22 is formed at the upper end of the cylindrical section, and the larger end 21 is welded to the lower end of the cylindrical section. The larger end 21 is constructed in a trumpet shape. The larger end 21 and the cylindrical section have a smooth transition. The larger end 21 of the umbrella cone 20 is arranged on the side where the smaller end 11 of the male cone 10 is located. The outer diameter of the larger end 21 is equal to the diameter of the drill hole 30, and the inner diameter of the cylindrical section is equal to the outer diameter of the dropped drill rod 40.

[0034] In use, the umbrella cone 20 rotates along with the male cone 10 under the drive of the drill rod used for retrieval. The male cone 10 and the umbrella cone 20 rotate and move downward synchronously. When the larger end 21 of the umbrella cone 20 contacts the top of the fallen drill rod 40, the fallen drill rod 40 will move towards the axis of the borehole 30 under the guidance of the larger end 21 until the fallen drill rod 40 moves into the cylindrical section of the umbrella cone 20. At this time, the fallen drill rod 40, the umbrella cone 10 and the borehole 30 are arranged coaxially. In this case, the umbrella cone 10 can quickly complete the connection with the fallen drill rod 40, improving the retrieval efficiency.

[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 conical retrieval device, characterized in that, The device includes an umbrella cone sleeved outside the male cone. The male cone has a flange at its end, and the end face of the flange has an annular groove. A positioning ring is screwed into the annular groove. The umbrella cone has a connecting plate at its end, and the connecting plate passes through the flange and screws into the positioning ring.

2. The umbrella cone retrieval device as described in claim 1, characterized in that, The larger end of the umbrella cone is positioned on one side of the smaller end of the male cone.

3. The umbrella cone retrieval device as described in claim 2, characterized in that, The outer diameter of the larger end of the umbrella cone is equal to the diameter of the borehole.

4. The umbrella cone retrieval device as described in claim 3, characterized in that, The inner diameter of the smaller end of the umbrella cone is equal to the outer diameter of the fallen drill rod.

5. The umbrella cone retrieval device as described in claim 4, characterized in that, The flange is provided with a slot for the connecting plate to pass through.

6. The umbrella cone retrieval device as described in claim 5, characterized in that, The slot is configured in an arc shape to fit the shape of the connecting plate.

7. The umbrella cone retrieval device as described in claim 6, characterized in that, The slot is arranged on the inner sidewall of the annular groove.

8. The umbrella cone retrieval device as described in claim 7, characterized in that, The slots are evenly distributed along the circumference of the annular groove.

9. The umbrella cone retrieval device as described in claim 8, characterized in that, The annular groove is arranged coaxially with the male cone.

10. The umbrella cone retrieval device as described in claim 9, characterized in that, The inner wall of the positioning ring is threadedly connected to both the inner wall of the ring groove and the outer wall of the connecting plate.

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