Three-channel drill rod structure

Abstract

The utility model discloses a three-channel drill rod structure, and relates to the technical field of drill rods, the three-channel drill rod structure comprises a plurality of drill rods jointly formed by an inner pipe and an outer pipe arranged on the outer surface of the inner pipe in a sleeving mode, and a gap is reserved between the outer surface of the inner pipe and the inner wall of the outer pipe. Through cooperative arrangement of the connecting partition plates, the connectors, the external threads, the connecting rings, the internal threads and other structures, during connection, the connecting partition plates of the two sections of drill rods are aligned at first, then the two sections of outer pipes are held tightly, the connecting rings are rotated, and the two sections of outer pipes are connected together in a threaded mode through the external threads formed in the connectors and the internal threads formed in the connecting rings; due to the fact that the two drill rods do not need to rotate relatively in the connecting process, the connecting partition plates arranged in the two drill rods are kept parallel all the time, it is guaranteed that outer channels jointly formed by the second channels and the third channels of the two drill rods are aligned all the time, and the problem that after an existing drill rod structure is connected, the outer channels of the adjacent drill rods are difficult to align accurately is solved as much as possible. And the use by a user is inconvenient.

Description

Technical Field

[0001] The present application relates to the technical field of drill rods, and in particular to a three-channel drill rod structure. Background Art

[0002] The drill pipe is a drilling tool in the oil and gas drilling industry. During the drilling process, drilling fluid is transported and torque is transmitted through the drill pipe to complete the drilling. With the development of high-efficiency rock-breaking cutting-edge drilling technologies such as high-pressure water jet rock-breaking technology, rotary impact drilling rock-breaking technology, particle impact rock-breaking technology, laser drilling rock-breaking technology, and electron beam rock-breaking technology, the drill pipe must transmit two or more media to the bottom of the well. The traditional single-channel drill pipe cannot meet this demand. With the rapid development of my country's national economy, the demand for oil and gas resources in my country continues to increase. In order to improve rock-breaking efficiency, reduce drilling time, and reduce drilling costs, the main battlefield of oil and gas exploration and drilling technology has gradually shifted to high-efficiency rock-breaking cutting-edge drilling technology.

[0003] The utility model patent with announcement number CN111594066B proposes a three-channel drill pipe, which is mainly composed of an inner channel, an outer channel A, an outer channel B, an inner tube, an outer tube, a support rib baffle, a groove, a boss, a male threaded joint, a female threaded joint, a male plug, a female plug, a sealing ring and a Z-shaped sealing gasket. The two support rib baffles are between the outer surface of the inner tube and the inner surface of the outer tube to form the outer channel A and the outer channel B; the inner tube forms an inner channel; the two ends of the support rib baffle have grooves and bosses respectively; the male threaded joint is at the upper end of the outer tube; the male plug is at the upper end of the inner tube; the female threaded joint is at the lower end of the outer tube; the female plug is at the lower end of the inner tube; the two sealing rings are embedded in the female plug; the Z-shaped sealing gasket is installed on the groove and the boss.

[0004] The above-mentioned drill pipe structure is connected to the external pipe through a male threaded joint and a female threaded joint. After the threaded connection is completed, it is impossible to ensure that the external channels A and B of two adjacent sections of the drill pipe are accurately aligned, resulting in possible leakage between different media transported in the external channels A and B, which is inconvenient for users. Utility Model Content

[0005] The utility model aims to solve or at least alleviate the problem that after the existing drill rod structure is connected, the outer channels of adjacent drill rods are difficult to accurately align, which is inconvenient for users to use.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A three-channel drill pipe structure comprises an inner pipe and a plurality of drill pipes formed by an outer pipe sleeved on the outer surface of the inner pipe, a gap is left between the outer surface of the inner pipe and the inner wall of the outer pipe, the outer wall of the inner pipe and the inner wall of the outer pipe are fixedly connected by a connecting piece, and both ends of the inner pipe are provided with a matching first connecting structure, and both ends of the outer pipe are provided with a matching second connecting structure, the second connecting structure comprises a joint integrally formed at one end of the outer pipe, the joint is provided with an external thread, and also comprises a connecting ring rotatably connected to the other end of the outer pipe, and the inner side wall of the connecting ring is provided with an internal thread matching the external thread.

[0008] By adopting the above technical solution, when using, the user first aligns the two sections of drill pipe and rotates one of the drill pipes to align the connecting partitions arranged in the two sections of drill pipe with each other, and then moves one section of drill pipe so that the end of the outer tube of the drill pipe with a joint is inserted into the connecting ring installed on the outer tube of the other section of drill pipe. At this time, the two sections of outer tubes are held tightly and the connecting ring is rotated to screw the two sections of outer tubes together through the external threads on the joints and the internal threads in the connecting ring. Since the two sections of drill pipe do not need to rotate relative to each other during the connection process, the connecting partitions arranged in the two sections of drill pipe always remain parallel, ensuring that the outer channels formed by the second channels and the third channels of the two sections of drill pipe are always aligned, and the problem that the outer channels of adjacent drill pipes are difficult to accurately align after the existing drill pipe structure is connected, which is inconvenient for users to use, is avoided as much as possible.

[0009] Optionally, the first connection structure includes a plug joint formed at one end of the inner tube, and also includes a plug hole provided at the other end of the inner tube, and the inner tubes of two adjacent drill rods are threadedly connected through the plug joint and the plug hole.

[0010] By adopting the above technical solution, when in use, the plug connector of one drill rod inner tube is plugged into the plug hole of the other drill rod inner tube, thereby realizing the connection work of the two drill rod inner tubes.

[0011] Optionally, a sealing ring for sealing the connection between the plug connector and the plug hole is sleeved on the inner tube below the plug connector.

[0012] By adopting the above technical solution, a sealing ring is provided to seal the connection between the two inner tubes, so as to avoid leakage of the medium transmitted through the inner tube from the connection between the two sections of the inner tubes as much as possible.

[0013] Optionally, the connecting member is two connecting partitions symmetrically arranged on both sides of the inner tube, and both sides of the connecting partitions extend outward to form a connecting portion with an arc structure, and both sides of the connecting partitions are respectively welded to the inner wall of the outer tube and the outer wall of the inner tube through the connecting portion.

[0014] By adopting the above technical solution, a connecting baffle is provided to relatively fix the inner tube and the outer tube, and a connecting portion is provided to increase the contact surface between the two sides of the connecting baffle and the inner tube and the outer tube, thereby improving the stability of the connecting baffle welding.

[0015] Optionally, the inner cavity of the inner tube forms a first channel, the gaps on one side of the two connecting partitions form a second channel, and the gaps on the other side of the two connecting partitions form a third channel.

[0016] By adopting the above technical solution, the user can transport different media through the first channel, the second channel and the third channel respectively during use to assist the drill rod to work.

[0017] Optionally, a bearing is provided at the connection between the connecting ring and the outer tube, the inner ring of the bearing is sleeved on the outer tube and fixedly connected to the outer tube, and the outer ring of the bearing is embedded in the connecting ring and fixedly connected to the connecting ring.

[0018] By adopting the above technical solution, a bearing is installed at the connection between the connecting ring and the outer tube to reduce the friction between the connecting ring and the outer tube through the bearing, making it convenient for the user to rotate the connecting ring to match the joint to connect and fix the two sections of the outer tube.

[0019] Optionally, after the connector is tightly threadedly connected to the connecting ring through the external thread, the plug connector is completely inserted into the inner cavity of the plug hole.

[0020] By adopting the above technical solution, after the two sections of outer tubes are stably connected through the joint and the connecting ring, the two sections of inner tubes can also be stably connected through the plug joint and the plug hole.

[0021] Optionally, an upper clamping tooth is provided at one end of the outer tube, and a lower clamping tooth matched with the upper clamping tooth is provided at the other end of the outer tube.

[0022] By adopting the above technical solution, upper and lower latch teeth are provided to limit the position between the two outer tubes, so as to avoid relative rotation of the two outer tubes connected by the joint and the connecting ring after being subjected to force.

[0023] In summary, the beneficial effects of this application are as follows:

[0024] The present application connects the bulkheads, joints, external threads, connecting rings and internal threads. When connecting, first align the connecting bulkheads of the two drill pipe sections. Then, hold the two outer tubes tightly and rotate the connecting ring. The two outer tubes are screwed together through the external threads on the joints and the internal threads in the connecting ring. During the connection process, the two drill pipe sections do not need to rotate relative to each other. Therefore, the connecting bulkheads in the two drill pipe sections always remain parallel, ensuring that the external channels formed by the second channels and the third channels of the two drill pipe sections are always aligned. This avoids the problem that the external channels of adjacent drill pipes are difficult to align accurately after the existing drill pipe structure is connected, which is inconvenient for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall cross-sectional structure of this application;

[0026] Figure 2 It is a schematic diagram of the installation structure of the connecting ring of the present application;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the drill rod of the present application.

[0028] Explanation of the reference numerals: 1. inner tube; 2. first channel; 3. plug connector; 4. plug hole; 5. outer tube; 6. connecting baffle; 7. connecting part; 8. second channel; 9. third channel; 10. connector; 11. external thread; 12. connecting ring; 13. bearing; 14. internal thread; 15. lower clamping tooth; 16. upper clamping tooth; 17. sealing ring. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] See also Figure 1-3 A three-channel drill pipe structure includes an inner pipe 1 and an outer pipe 5 sleeved on the outer surface of the inner pipe 1 to form a plurality of drill pipes, wherein a gap is left between the outer surface of the inner pipe 1 and the inner wall of the outer pipe 5.

[0031] The outer wall of the inner tube 1 and the inner wall of the outer tube 5 are fixedly connected by a connecting piece, so that the inner tube 1 and the outer tube 5 are relatively fixed, and the connecting piece can separate the gap between the inner tube 1 and the outer tube 5.

[0032] Both ends of the inner tube 1 are provided with matching first connection structures, so that the inner tubes 1 of adjacent drill pipes can be connected to each other through the first connection structures.

[0033] Both ends of the outer tube 5 are provided with matching second connection structures, so that the outer tubes 5 of adjacent drill pipes can be connected to each other through the second connection structures, thereby connecting multiple drill pipe structures into a whole.

[0034] The second connection structure includes a joint 10 integrally formed at one end of the outer tube 5, on which an external thread 11 is provided, and also includes a connecting ring 12 rotatably connected to the other end of the outer tube 5, on the inner side wall of the connecting ring 12 is provided an internal thread 14 adapted to the external thread 11.

[0035] Reference Figure 1 The first connection structure includes a plug connector 3 formed at one end of the inner tube 1 and a plug hole 4 provided at the other end of the inner tube 1. The inner tubes 1 of two adjacent drill rods are screwed together through the plug connector 3 and the plug hole 4. When in use, the plug connector 3 of one drill rod inner tube 1 is plugged into the plug hole 4 of the other drill rod inner tube 1 to achieve the connection of the two drill rod inner tubes 1.

[0036] Reference Figure 1The inner tube 1 below the plug connector 3 is sleeved with a sealing ring 17 for sealing the connection between the plug connector 3 and the plug hole 4. The sealing ring 17 is provided to seal the connection between the two inner tubes 1 to prevent the medium transmitted through the inner tube 1 from leaking from the connection between the two inner tubes 1.

[0037] Reference Figure 2 The connecting parts are two connecting baffles 6 symmetrically arranged on both sides of the inner tube 1. Both sides of the connecting baffles 6 extend outward to form connecting parts 7 of an arc structure. Both sides of the connecting baffles 6 are respectively welded to the inner wall of the outer tube 5 and the outer wall of the inner tube 1 through the connecting parts 7. The connecting baffles 6 are arranged to relatively fix the inner tube 1 and the outer tube 5. The connecting parts 7 are arranged to increase the contact surface between the two sides of the connecting baffles 6 and the inner tube 1 and the outer tube 5, thereby improving the stability of the welding of the connecting baffles 6.

[0038] Reference Figure 3 The inner cavity of the inner tube 1 forms a first channel 2, the gap on one side of the two connecting partitions 6 forms a second channel 8, and the gap on the other side of the two connecting partitions 6 forms a third channel 9. When in use, the user can transport different media through the first channel 2, the second channel 8 and the third channel 9 respectively to assist the drill rod in working.

[0039] Reference Figure 2 A bearing 13 is provided at the connection between the connecting ring 12 and the outer tube 5. The inner ring of the bearing 13 is sleeved on the outer tube 5 and fixedly connected to the outer tube 5. The outer ring of the bearing 13 is embedded in the connecting ring 12 and fixedly connected to the connecting ring 12. The bearing 13 is installed at the connection between the connecting ring 12 and the outer tube 5 to reduce the friction between the connecting ring 12 and the outer tube 5 through the bearing 13, so that the user can rotate the connecting ring 12 to cooperate with the joint 10 to connect and fix the two sections of the outer tube 5.

[0040] Reference Figure 1 After the joint 10 is tightly screwed with the connecting ring 12 through the external thread 11, the plug joint 3 is completely inserted into the inner cavity of the plug hole 4. After the two sections of the outer tube 5 are stably connected through the joint 10 and the connecting ring 12, the two sections of the inner tube 1 can also be stably connected through the plug joint 3 and the plug hole 4.

[0041] Reference Figure 1 One end of the outer tube 5 is provided with an upper latching tooth 16, and the other end of the outer tube 5 is provided with a lower latching tooth 15 adapted to the upper latching tooth 16. The upper latching tooth 16 and the lower latching tooth 15 are provided to limit the position between the two sections of the outer tube 5, and to avoid relative rotation of the two sections of the outer tube 5 connected by the joint 10 and the connecting ring 12 after being subjected to force.

[0042] The implementation principle of the present application is as follows: when in use, the user first aligns the two sections of drill pipe and rotates one of the drill pipes so that the connecting partitions 6 arranged in the two sections of drill pipe are aligned with each other, and then moves one section of drill pipe so that the end of the outer tube 5 of the drill pipe with the joint 10 is inserted into the connecting ring 12 installed on the outer tube 5 of the other section of drill pipe. At this time, the two sections of outer tubes 5 are held tightly and the connecting ring 12 is rotated. The two sections of outer tubes 5 are screwed together through the external thread 11 provided on the joint 10 and the internal thread 14 provided in the connecting ring 12. Since the two sections of drill pipe do not need to rotate relative to each other during the connection process, the connecting partitions 6 arranged in the two sections of drill pipe always remain parallel, ensuring that the outer channels formed by the second channels 8 and the third channels 9 of the two sections of drill pipe are always aligned, and the problem that the outer channels of adjacent drill pipes are difficult to accurately align after the existing drill pipe structure is connected, which is inconvenient for users to use, is avoided as much as possible.

[0043] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A three-channel drill pipe structure, comprising an inner pipe (1), an outer pipe (5) sleeved on the outer surface of the inner pipe (1) and a plurality of drill pipes formed together, a gap is left between the outer surface of the inner pipe (1) and the inner wall of the outer pipe (5), the outer wall of the inner pipe (1) and the inner wall of the outer pipe (5) are fixedly connected by a connecting piece, and both ends of the inner pipe (1) are provided with a matching first connecting structure, and both ends of the outer pipe (5) are provided with a matching second connecting structure, characterized in that: The second connection structure comprises a joint (10) integrally formed at one end of the outer tube (5), the joint (10) being provided with an external thread (11), and a connecting ring (12) rotatably connected to the other end of the outer tube (5), the connecting ring (12) having an internal thread (14) adapted to the external thread (11) being provided on an inner side wall thereof.

2. A three-channel drill pipe structure according to claim 1, characterized in that: The first connection structure comprises a plug connector (3) formed at one end of the inner tube (1), and also comprises a plug hole (4) provided at the other end of the inner tube (1); the inner tubes (1) of two adjacent drill rods are threadedly connected via the plug connector (3) and the plug hole (4).

3. A three-channel drill pipe structure according to claim 2, characterized in that: The inner tube (1) below the plug connector (3) is sleeved with a sealing ring (17) for sealing the connection between the plug connector (3) and the plug hole (4).

4. A three-channel drill pipe structure according to claim 1, characterized in that: The connecting member is two connecting baffles (6) symmetrically arranged on both sides of the inner tube (1), and both sides of the connecting baffles (6) extend outward to form connecting portions (7) of an arc structure. The two sides of the connecting baffles (6) are respectively welded to the inner wall of the outer tube (5) and the outer wall of the inner tube (1) through the connecting portions (7).

5. A three-channel drill pipe structure according to claim 4, characterized in that: The inner cavity of the inner tube (1) forms a first channel (2), the gap on one side of the two connecting partitions (6) forms a second channel (8), and the gap on the other side of the two connecting partitions (6) forms a third channel (9).

6. A three-channel drill pipe structure according to claim 5, characterized in that: A bearing (13) is provided at the connection between the connecting ring (12) and the outer tube (5); the inner ring of the bearing (13) is sleeved on the outer tube (5) and fixedly connected to the outer tube (5); the outer ring of the bearing (13) is embedded in the connecting ring (12) and fixedly connected to the connecting ring (12).

7. A three-channel drill pipe structure according to claim 2, characterized in that: After the joint (10) is tightly threadedly connected to the connecting ring (12) via the external thread (11), the plug joint (3) is completely plugged into the inner cavity of the plug hole (4).

8. A three-channel drill pipe structure according to claim 1, characterized in that: An upper latching tooth (16) is provided at one end of the outer tube (5), and a lower latching tooth (15) matched with the upper latching tooth (16) is provided at the other end of the outer tube (5).

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