Oil drill pipe reducer union with buffer structure

Abstract

The utility model discloses a petroleum drill pipe reducer union with a buffer structure, which comprises a drill pipe body, a reducer union assembly and a limit fixing assembly, the reducer union assembly is arranged at the bottom of the drill pipe body, and the limit fixing assembly is arranged at the bottom of the reducer union assembly. The reducer union assembly comprises a reducer union body, a first spring, a limiting ring, a limiting seat, a sliding rod, a first damper, a second damper, a sliding groove, a sliding block and a second spring, the limiting fixing assembly comprises a positioning circular ring, a clamp, a threaded frame, a positioning rod and a mounting rod, and the limiting ring is arranged on the surface of the reducer union body. The petroleum drill rod reducer union with the buffer structure has the advantage of being good in buffer effect, and solves the problem that when a reducer union in the prior art is installed, the surface of the reducer union is not provided with a buffer structure, and consequently the joint position of the reducer union is prone to displacement or thread slipping in the working process of the reducer union.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe reducing joint technology, and specifically to an oil drill pipe reducing joint with a buffer structure. Background Technology

[0002] A drill pipe is a threaded steel pipe used to connect the drilling rig's surface equipment to the drilling equipment or bottom hole assembly located at the bottom of the well. The purpose of the 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 pipes must be able to withstand enormous internal and external pressure, torsion, bending, and vibration. In the process of oil and gas extraction and refining, drill pipes can be reused multiple times. Drill pipes are classified into three categories: angular drill pipe, drill rod, and heavy-duty drill pipe.

[0003] Drill pipe reducer is a special connector used to connect drill pipes of different diameters. It has the functions of diameter reduction and conversion connection. However, the existing reducer does not have a buffer structure on its surface during installation, which makes it easy for displacement or stripping to occur at the joint during operation. Therefore, there is an urgent need for an oil drill pipe reducer with a buffer structure to overcome the above defects. Utility Model Content

[0004] The purpose of this invention is to provide an oil drill pipe reducing joint with a buffer structure, which has the advantage of good buffering effect, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable diameter joint for oil drill pipe with a buffer structure, comprising a drill pipe body, a variable diameter joint assembly, and a limiting and fixing assembly. The variable diameter joint assembly is disposed at the bottom of the drill pipe body, and the limiting and fixing assembly is disposed at the bottom of the variable diameter joint assembly. The variable diameter joint assembly includes a variable diameter joint body, a first spring, a limiting ring, a limiting seat, a slide rod, a first damper, a second damper, a slide groove, a slider, and a second spring. The limiting and fixing assembly includes a positioning ring, a clamp, a threaded bracket, a positioning rod, and an installation rod.

[0006] Furthermore, the limiting ring is disposed on the surface of the reducing connector body, the limiting seats are fixedly installed on both sides of the bottom of the reducing connector body surface, the slide rod is disposed in the inner cavity of the limiting seat, and the positioning ring is fixedly installed on the bottom of the slide rod.

[0007] Furthermore, the first dampers are all fixedly installed around the bottom of the limiting ring, the bottom of the first damper is fixedly connected to the top of the surface of the reducing joint body, the first spring is sleeved on the surface of the first damper, and the top of the first spring is fixedly connected to the bottom of the limiting ring.

[0008] Furthermore, the bottom of the first spring is fixedly connected to the top of the surface of the reducing joint body, the second damper is fixedly installed on the top of the inner cavity of the limiting seat, the bottom of the second damper is fixedly connected to the top of the slide rod, and sliding grooves are provided on both sides of the inner cavity of the limiting seat.

[0009] Furthermore, a slider is slidably connected inside the groove, and the side of the slider that is relatively close to the slider is fixedly connected to both sides of the slider rod. A second spring is fixedly installed in the inner cavity of the groove and at the bottom of the slider.

[0010] Furthermore, the threaded bracket is rotated on both sides inside the positioning ring by the thread, and the clamps are all set on both sides of the inner cavity of the positioning ring. The side of the threaded bracket that is relatively close to the other side is rotatably connected to the side of the clamp that is relatively far away by the bearing.

[0011] Furthermore, the positioning rod slides within the inner cavity of the slide bar, and an mounting rod is fixedly installed on the side of the positioning rod that is relatively close to it. The bottom of the mounting rod is fixedly connected to the top of the clamp.

[0012] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this utility model are:

[0013] This invention facilitates the connection and fixation of drill pipe bodies by setting a reducing connector assembly, enabling the installation of drill pipe bodies of different diameters. A limiting and fixing assembly secures the surface of the drill pipe body. In use, the reducing connector body is first installed at the bottom of the drill pipe body using the corresponding threads. After installation, the limiting ring is damped and buffered by the first spring and the first damper, thus providing buffer protection at the connection between the drill pipe body and the reducing connector body. Next, another drill pipe body is installed at the bottom of the reducing connector body using threads. Before installation, the threaded bracket is rotated, causing the clamp to engage. The drill rod moves inward and fixes the surface of the drill rod body. When shaking occurs, the drill rod body will not vibrate due to the cooperation of the positioning ring, threaded bracket and clamp. At the same time, during installation, the drill rod body drives the clamp to move upward, which causes the slide rod to drive the second damper to move upward and is fixed by threads. After fixing, the drill rod body is buffered and protected by the cooperation of the second damper, slide block and second spring. It has the advantage of good buffering effect and solves the problem that the existing reducing joint does not have a buffer structure on its surface during installation, which makes it easy for the joint to be displaced or stripped during operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the body structure of the reducing connector of this utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the limiting and fixing component of this utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting seat of this utility model.

[0018] In the diagram: 1. Drill pipe body; 2. Variable diameter joint assembly; 21. Variable diameter joint body; 22. First spring; 23. Limiting ring; 24. Limiting seat; 25. Slide rod; 26. First damper; 27. Second damper; 28. Slide groove; 29. ​​Slider; 291. Second spring; 3. Limiting and fixing assembly; 31. Positioning ring; 32. Clamp; 33. Threaded bracket; 34. Positioning rod; 35. Mounting rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] This utility model provides, for example Figure 1-4 As shown, an oil drill pipe reducing joint with a buffer structure includes a drill pipe body 1, a reducing joint assembly 2, and a limiting and fixing assembly 3. The reducing joint assembly 2 is disposed at the bottom of the drill pipe body 1, and the limiting and fixing assembly 3 is disposed at the bottom of the reducing joint assembly 2. The reducing joint assembly 2 includes a reducing joint body 21, a first spring 22, a limiting ring 23, a limiting seat 24, a slide rod 25, a first damper 26, a second damper 27, a slide groove 28, a slider 29, and a second spring 291. The limiting and fixing assembly 3 includes a positioning ring 31, a clamp 32, a threaded bracket 33, a positioning rod 34, and an installation rod 35.

[0021] More specifically, the surface of the drill rod body 1 is fixed by setting the limiting and fixing component 3. In use, the reducing connector body 21 is first installed at the bottom of the drill rod body 1 through the corresponding thread. After installation, the limiting ring 23 is damped and buffered by the first spring 22 and the first damper 26, thereby providing buffer protection at the connection between the drill rod body 1 and the reducing connector body 21. Then, another drill rod body 1 is installed at the bottom of the reducing connector body 21 through the thread. Before installation, the threaded bracket 33 is rotated, and the threaded bracket 33 drives the clamp 32 to move inward and fixes the surface of the drill rod body 1. When shaking occurs, the drill rod body 1 will not shake due to the cooperation of the positioning ring 31, the threaded bracket 33 and the clamp 32. At the same time, during installation, the drill rod body 1 drives the clamp 32 to move upward, so that the slide rod 25 drives the second damper 27 to move upward and is fixed by the thread. After fixing, the drill rod body 1 is buffered and protected by the cooperation of the second damper 27, the slide block 29 and the second spring 291, which has the advantage of good buffering effect.

[0022] In some embodiments, the limiting ring 23 is disposed on the surface of the reducing connector body 21, the limiting seats 24 are fixedly installed on both sides of the bottom of the reducing connector body 21, the slide rod 25 is disposed in the inner cavity of the limiting seat 24, and the positioning ring 31 is fixedly installed at the bottom of the slide rod 25. More specifically, the limiting ring 23 is used to limit the connection between the bottom of the drill pipe body 1 and the reducing connector body 21, and the slide rod 25 is used to fix the positioning ring 31.

[0023] In some embodiments, the first dampers 26 are all fixedly installed around the bottom of the limiting ring 23. The bottom of the first damper 26 is fixedly connected to the top of the surface of the reducing joint body 21. The first spring 22 is sleeved on the surface of the first damper 26. The top of the first spring 22 is fixedly connected to the bottom of the limiting ring 23. More specifically, the limiting ring 23 is damped and buffered by setting the first damper 26 and the first spring 22.

[0024] In some embodiments, the bottom of the first spring 22 is fixedly connected to the top of the surface of the reducing joint body 21, the second damper 27 is fixedly installed on the top of the inner cavity of the limiting seat 24, the bottom of the second damper 27 is fixedly connected to the top of the slide rod 25, and the inner cavity of the limiting seat 24 is provided with slide grooves 28 on both sides. More specifically, the slide rod 25 is damped by setting the second damper 27, and the slide 29 is limited by setting the slide grooves 28 to prevent the slide 29 from shaking during movement.

[0025] In some embodiments, a slider 29 is slidably connected inside the slide groove 28. The side of the slider 29 that is relatively close to the slider is fixedly connected to both sides of the slide rod 25. A second spring 291 is fixedly installed in the inner cavity of the slide groove 28 and at the bottom of the slider 29. More specifically, the slider 29 is used to limit the slide rod 25 to prevent the slide rod 25 from shaking during movement, and the second spring 291 is used to buffer the slider 29.

[0026] In some embodiments, the threaded bracket 33 is rotated on both sides inside the positioning ring 31 by a thread, and the clamps 32 are both disposed on both sides of the inner cavity of the positioning ring 31. The relatively close side of the threaded bracket 33 is rotatably connected to the relatively far side of the clamp 32 by a bearing. More specifically, the position of the clamp 32 is moved by setting the threaded bracket 33, and the surface of the drill rod body 1 is fixed by setting the clamp 32.

[0027] In some embodiments, the positioning rod 34 slides within the inner cavity of the slide rod 25, and an mounting rod 35 is fixedly installed on the side of the positioning rod 34 that is relatively close to it. The bottom of the mounting rod 35 is fixedly connected to the top of the clamp 32. More specifically, the positioning rod 34 is used to limit the mounting rod 35 to prevent it from shaking during movement, and the mounting rod 35 is used to limit the clamp 32 to prevent it from shaking during movement.

[0028] Working principle:

[0029] Step 1: When using, first install the reducer body 21 at the bottom of the drill pipe body 1 through the corresponding thread. After installation, the limit ring 23 is damped and buffered by the first spring 22 and the first damper 26, thereby providing buffer protection at the connection between the drill pipe body 1 and the reducer body 21. Then, install another drill pipe body 1 at the bottom of the reducer body 21 through the thread. Before installation, rotate the threaded bracket 33.

[0030] Step 2: The threaded bracket 33 drives the clamp 32 to move inward and fixes the surface of the drill rod body 1. When shaking occurs, the drill rod body 1 will not vibrate due to the cooperation of the positioning ring 31, the threaded bracket 33 and the clamp 32. At the same time, during installation, the drill rod body 1 drives the clamp 32 to move upward, so that the slide rod 25 drives the second damper 27 to move upward and is fixed by threads. After fixing, the drill rod body 1 is buffered and protected by the cooperation of the second damper 27, the slide block 29 and the second spring 291, which has the advantage of good buffering effect.

[0031] 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 the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A reducing joint for oil drill pipes with a buffer structure, characterized in that: The device includes a drill pipe body (1), a reducing connector assembly (2), and a limiting and fixing assembly (3). The reducing connector assembly (2) is located at the bottom of the drill pipe body (1), and the limiting and fixing assembly (3) is located at the bottom of the reducing connector assembly (2). The reducing connector assembly (2) includes a reducing connector body (21), a first spring (22), a limiting ring (23), a limiting seat (24), a slide rod (25), a first damper (26), a second damper (27), a slide groove (28), a slider (29), and a second spring (291). The limiting and fixing assembly (3) includes a positioning ring (31), a clamp (32), a threaded bracket (33), a positioning rod (34), and an installation rod (35).

2. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The limiting ring (23) is disposed on the surface of the reducing connector body (21), the limiting seat (24) is fixedly installed on both sides of the bottom of the reducing connector body (21), the slide rod (25) is disposed in the inner cavity of the limiting seat (24), and the positioning ring (31) is fixedly installed at the bottom of the slide rod (25).

3. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The first damper (26) is fixedly installed around the bottom of the limiting ring (23). The bottom of the first damper (26) is fixedly connected to the top of the surface of the reducing joint body (21). The first spring (22) is sleeved on the surface of the first damper (26). The top of the first spring (22) is fixedly connected to the bottom of the limiting ring (23).

4. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The bottom of the first spring (22) is fixedly connected to the top of the surface of the reducing joint body (21), the second damper (27) is fixedly installed on the top of the inner cavity of the limiting seat (24), the bottom of the second damper (27) is fixedly connected to the top of the slide rod (25), and the two sides of the inner cavity of the limiting seat (24) are provided with slide grooves (28).

5. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The slide groove (28) is slidably connected to a slider (29). The side of the slider (29) that is relatively close to the slider is fixedly connected to both sides of the slide rod (25). A second spring (291) is fixedly installed in the inner cavity of the slide groove (28) and at the bottom of the slider (29).

6. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The threaded bracket (33) rotates on both sides inside the positioning ring (31) by thread rotation. The clamps (32) are all set on both sides of the inner cavity of the positioning ring (31). The side of the threaded bracket (33) that is relatively close to each other is rotatably connected to the side of the clamps (32) that is relatively far away by bearings.

7. The oil drill pipe reducing joint with a buffer structure according to claim 1, characterized in that: The positioning rod (34) slides in the inner cavity of the slide rod (25), and an installation rod (35) is fixedly installed on the side of the positioning rod (34) that is relatively close to it. The bottom of the installation rod (35) is fixedly connected to the top of the clamp (32).

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