A drill pipe joint with buttress thread

Abstract

The utility model discloses a tooth thread drill rod joint belongs to drill rod joint technical field, including two drill pipe, the top of two drill pipe all is provided with outer thread joint. In the utility model, through the cooperation of outer thread joint, inner thread joint, outer thread tooth and inner thread tooth can make the connection between two drill pipe, in addition, the first sleeve and second sleeve are installed in the side portion of carding groove, make the reinforcing pin is inserted into the first reinforcing hole and second reinforcing hole, thereby the connection strength between two drill pipe is strengthened, avoid the looseness between two drill pipe, when a plurality of drill pipe synchronous rotation, on one hand, utilize outer thread tooth and inner thread tooth and drive between two drill pipe, on the other hand, utilize first reinforcing hole, second reinforcing hole and reinforcing pin and drive between two drill pipe, avoid the moment that two drill pipe between is received and is big, causes the damage of thread.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe joint technology, and more specifically, to a tooth-type threaded drill pipe joint. Background Technology

[0002] Drill pipe is a threaded steel pipe used to connect drilling rig surface equipment to drilling equipment or bottom hole assembly located at the bottom of the well. The purpose of drill pipe is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole assembly. Drill pipe must be able to withstand enormous internal and external pressure, torsion, bending, and vibration. In the oil and gas extraction and refining process, drill pipe can be reused multiple times. Existing drill pipe connections are all made using threaded connections; however, threaded connections alone are not very stable. The drill pipe is prone to loosening during rotation and is also susceptible to damage from large torques, affecting the quality of the drill pipe connection. Therefore, we propose a tooth-type threaded drill pipe joint. Utility Model Content

[0003] In view of the problems mentioned in the background art above, the purpose of this utility model is to provide a tooth-type threaded drill pipe connector.

[0004] To solve the above problems, the present invention adopts the following technical solution: a tooth-type threaded drill pipe joint, comprising two drill pipes, each drill pipe having an external threaded joint at its top and an internal threaded joint at its bottom; the top of one external threaded joint is threaded into the inner cavity of the internal threaded joint; each of the two drill pipes has a locking groove at its bottom; the external threaded joint has multiple first reinforcing holes on its side; the locking groove has multiple second reinforcing holes on its inner wall; a first retaining sleeve is fitted on the outer side of one locking groove; a second retaining sleeve is fitted on the outer side of one locking groove; a connecting mechanism is provided between the first retaining sleeve and the second retaining sleeve; a reinforcing pin is fixedly connected to the inner wall of both the first retaining sleeve and the second retaining sleeve; the end of the reinforcing pin is movably fitted into the inner cavity of the first reinforcing hole and the second reinforcing hole.

[0005] As a preferred embodiment of this utility model, the connecting mechanism includes a stepped hole provided on the first sleeve and a threaded hole provided on the second sleeve. The inner cavity of the stepped hole is fitted with an internal hexagon bolt, and the end of the internal hexagon bolt is threaded into the inner cavity of the threaded hole.

[0006] As a preferred embodiment of this utility model, the outer side of the external threaded connector is provided with external thread teeth, and the inner wall of the internal threaded connector is provided with internal thread teeth, wherein the external thread teeth and the internal thread teeth are compatible.

[0007] In a preferred embodiment of this utility model, the outer diameter of the mounting groove is equal to the inner diameter of the first ferrule and the second ferrule, respectively, and the outer diameter of the drill pipe is equal to the outer diameter of the first ferrule and the second ferrule, respectively.

[0008] In a preferred embodiment of this utility model, the heights of the first card sleeve and the second card sleeve are equal to the heights of the card slots.

[0009] In a preferred embodiment of this utility model, the outer diameter of the reinforcing pin is equal to the inner diameter of the second reinforcing hole and the first reinforcing hole, respectively.

[0010] Compared with the prior art, the advantages of this utility model are as follows: In this utility model, the connection between two drill pipes can be achieved through the cooperation of the external threaded joint, the internal threaded joint, and the external and internal threaded teeth. In addition, the first and second ferrules are installed on the side of the clamping groove, so that the reinforcing pin is inserted into the first and second reinforcing holes, thereby strengthening the connection strength between the two drill pipes and preventing loosening between the two drill pipes. When multiple drill pipes rotate synchronously, the external and internal threaded teeth are used to drive the transmission between the two drill pipes on the one hand, and the first reinforcing hole, the second reinforcing hole, and the reinforcing pin are used to drive the transmission between the two drill pipes on the other hand, avoiding damage to the threads caused by the large torque on the two drill pipes. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 is an exploded view of the overall structure of this utility model.

[0013] Figure 3 is a schematic diagram of the structure of the drill pipe of this utility model.

[0014] Figure 4 is a schematic diagram showing the disassembly of the first and second card sleeves of this utility model.

[0015] The following are the labels in the diagram: 1. Drill pipe; 2. External threaded connector; 3. Internal threaded connector; 4. Mounting groove; 5. First reinforcing hole; 6. Second reinforcing hole; 7. First ferrule; 8. Second ferrule; 9. Reinforcing pin; 10. Connecting mechanism; 11. Stepped hole; 12. Screw hole; 13. Socket headstock bolt; 14. External thread; 15. Internal thread. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0019] As shown in Figures 1 to 4, a tooth-type threaded drill pipe connector includes two drill pipes 1. Each drill pipe 1 has an external threaded connector 2 at its top and an internal threaded connector 3 at its bottom. The top of one external threaded connector 2 is threaded into the inner cavity of the internal threaded connector 3. The height of the external threaded connector 2 is equal to the depth of the inner cavity of the internal threaded connector 3, ensuring no gaps after the two drill pipes 1 are connected. Furthermore, when the external threaded connector 2 and internal threaded connector 3 on the two drill pipes 1 are threaded together, the first reinforcing hole 5 on the side of the external threaded connector 2 and the second reinforcing hole 6 on the side of the clamping groove 4 are aligned. This is ensured during processing. Each drill pipe 1 has a clamping groove 4 at its bottom end. The side of the external threaded connector 2 has multiple first reinforcing holes 5, and the inner wall of the clamping groove 4 has multiple second reinforcing holes 6. A first clamping sleeve 7 is fitted onto the outer side of one clamping groove 4. A second sleeve 8 is fitted on the outer side of the first sleeve 7. A connecting mechanism 10 is provided between the first sleeve 7 and the second sleeve 8. A reinforcing pin 9 is fixedly connected to the inner wall of both the first sleeve 7 and the second sleeve 8. The end of the reinforcing pin 9 is movably sleeved into the inner cavity of the first reinforcing hole 5 and the second reinforcing hole 6. The connecting mechanism 10 includes a stepped hole 11 provided on the first sleeve 7 and a screw hole 12 provided on the second sleeve 8. An internal hexagon bolt 13 is fitted into the inner cavity of the stepped hole 11. The end of the internal hexagon bolt 13 is threaded into the inner cavity of the screw hole 12. An external thread 14 is provided on the outer side of the external threaded connector 2. An internal thread 15 is provided on the inner wall of the internal threaded connector 3. The external thread 14 and the internal thread 15 are adapted to each other. The external thread 14 and the internal thread 15 are used to connect the external threaded connector 2 and the internal threaded connector 3 by means of the cooperation between the external thread 14 and the internal thread 15. Example 2

[0020] Based on Embodiment 1, as shown in Figures 1 to 4, the outer diameter of the mounting groove 4 is equal to the inner diameter of the first ferrule 7 and the second ferrule 8, respectively. The outer diameter of the drill pipe 1 is equal to the outer diameter of the first ferrule 7 and the second ferrule 8, respectively. The height of the first ferrule 7 and the second ferrule 8 is equal to the height of the mounting groove 4, respectively. This ensures the stability of the first ferrule 7 and the second ferrule 8 when fitted into the inner cavity of the mounting groove 4, and at the same time ensures the smoothness of the outside between the two connected drill pipes 1 after the first ferrule 7 and the second ferrule 8 are installed on the side of the mounting groove 4. Example 3

[0021] Based on Embodiment 1 and Embodiment 2, as shown in Figures 1 and 4, the outer diameter of the reinforcing pin 9 is equal to the inner diameter of the second reinforcing hole 6 and the first reinforcing hole 5, respectively, to ensure the stability of the reinforcing pin 9 when inserted into the inner cavity of the first reinforcing hole 5 and the second reinforcing hole 6.

[0022] It should be noted that this utility model is a tooth-type threaded drill pipe connector. When connecting two drill pipes 1, the external threaded connector 2 at the top of one drill pipe 1 is first threaded into the internal threaded connector 3 at the bottom of the other drill pipe 1, and the connection is made through the external thread 14 and the internal thread 15. When the top surface of one drill pipe 1 contacts the bottom end of the other drill pipe 1, the first reinforcing hole 5 on the side of the external threaded connector 2 and the second reinforcing hole 6 on the side of the clamping groove 4 are aligned. Then, the first retaining sleeve 7 and the second retaining sleeve 8 are fitted onto the side of the clamping groove 4, and the reinforcing pin 9 on the side of the first retaining sleeve 7 and the second retaining sleeve 8 are inserted into the inner cavity of the first reinforcing hole 5 and the second reinforcing hole 6. At this time, the internal hexagon bolt 13 is fitted into the inner cavity of the stepped hole 11, so that the end of the internal hexagon bolt 13 is threaded into the screw hole 12. The inner cavity is used to install the first ferrule 7 and the second ferrule 8 on the side of the mounting slot 4. Finally, when multiple drill pipes 1 rotate synchronously, on the one hand, the external thread 14 and the internal thread 15 are used to drive the transmission between the two drill pipes 1, and on the other hand, the first reinforcing hole 5, the second reinforcing hole 6 and the reinforcing pin 9 are used to drive the transmission between the two drill pipes 1.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A tooth-type threaded drill pipe joint, comprising two drill pipes (1), characterized in that: Both drill pipes (1) are provided with external threaded joints (2) at their tops and internal threaded joints (3) at their bottoms. The top of one external threaded joint (2) is threaded into the inner cavity of the internal threaded joint (3). Both drill pipes (1) are provided with clamping grooves (4) at their bottoms. The external threaded joint (2) is provided with multiple first reinforcing holes (5) on its side. The clamping groove (4) is provided with multiple second reinforcing holes (6) on its inner wall. A first clamping sleeve (7) is fitted on the outer side of one clamping groove (4), and a second clamping sleeve (8) is fitted on the outer side of one clamping groove (4). A connecting mechanism (10) is provided between the first clamping sleeve (7) and the second clamping sleeve (8). A reinforcing pin (9) is fixedly connected to the inner wall of both the first clamping sleeve (7) and the second clamping sleeve (8). The end of the reinforcing pin (9) is movably fitted into the inner cavity of the first reinforcing hole (5) and the second reinforcing hole (6).

2. The threaded drill pipe connector according to claim 1, characterized in that: The connecting mechanism (10) includes a stepped hole (11) on the first sleeve (7) and a screw hole (12) on the second sleeve (8). The inner cavity of the stepped hole (11) is fitted with an internal hexagon bolt (13), and the end of the internal hexagon bolt (13) is threaded into the inner cavity of the screw hole (12).

3. A tooth-type threaded drill pipe connector according to claim 1, characterized in that: The external threaded connector (2) is provided with external thread teeth (14) on its outer side, and the internal threaded connector (3) is provided with internal thread teeth (15) on its inner wall. The external thread teeth (14) and the internal thread teeth (15) are compatible with each other.

4. A tooth-type threaded drill pipe connector according to claim 1, characterized in that: The outer diameter of the mounting groove (4) is equal to the inner diameter of the first ferrule (7) and the second ferrule (8), respectively, and the outer diameter of the drill pipe (1) is equal to the outer diameter of the first ferrule (7) and the second ferrule (8), respectively.

5. A tooth-type threaded drill pipe connector according to claim 1, characterized in that: The heights of the first card sleeve (7) and the second card sleeve (8) are equal to the heights of the card slot (4).

6. A tooth-type threaded drill pipe connector according to claim 1, characterized in that: The outer diameter of the reinforcing pin (9) is equal to the inner diameter of the second reinforcing hole (6) and the first reinforcing hole (5), respectively.

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