Anti-wear bidirectional internal and external drill rod sealing structure

Abstract

The utility model discloses an anti-wear bi-directional internal and external drill rod sealing structure which comprises a drill rod, the drill rod comprises an outer rod, an inner rod, a sealing assembly and protection assemblies, the sealing assembly is arranged at one end of the outer rod and one end of the inner rod, the protection assemblies are arranged on the outer rod and the inner rod respectively, and the sealing assembly comprises a sealing component and a connecting component. Media such as underground slurry and oil gas can be effectively prevented from permeating or seeping out of gaps inside and outside the drill rod, so that the problem that cement slurry easily enters a space between the inner drill rod and the outer drill rod in the traditional process is solved, the stability and safety of the drilling process are greatly improved, and the service life of the drill rod and related equipment is prolonged. The maintenance cost and the shutdown time caused by medium seepage are reduced, the protection assembly is arranged, the outer rod and the inner rod can be well protected, and abrasion generated in the processes of rotation, torque transmission and complex underground environment bearing of the inner drill rod and the outer drill rod is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe technology, and more specifically, to a bidirectional internal and external drill pipe sealing structure for wear prevention. Background Technology

[0002] In drilling projects for resources such as oil and natural gas, drill pipe is a key component connecting surface equipment and underground drilling tools. While rotating and transmitting torque, it also needs to withstand the complex downhole environment. The bidirectional internal and external drill pipe sealing structure is a sealing technology applied to drill pipe, which aims to achieve a bidirectional sealing effect on the inside and outside of the drill pipe, preventing downhole mud, oil and gas and other media from seeping into or out of the gap between the inside and outside of the drill pipe, ensuring the stability and safety of the drilling process, and extending the service life of the drill pipe and related equipment.

[0003] The existing traditional process involves driving the pile into the ground with water first, creating a layer of mud between the inner and outer drill rods to prevent cement slurry from entering between them. During this process, lubricating oil must be added between the inner and outer drill rods every shift, and the process cannot be interrupted for long periods of time, otherwise the mud inside the drill rods will solidify and become unable to rotate. Moreover, this process causes a lot of friction between the inner and outer drill rods, which not only increases resistance but also wears down the drill rods.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in related technologies, this utility model proposes a bidirectional internal and external drill pipe sealing structure for wear prevention, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A bidirectional internal and external drill pipe sealing structure for wear prevention includes a drill pipe, which includes an outer rod, an inner rod, a sealing component, and a protective component. The sealing component is disposed at one end of the outer rod and the inner rod, and the protective component is disposed on the outer rod and the inner rod respectively. The sealing component includes a sealing part and a connecting part.

[0008] Furthermore, in order to better ensure the sealing effect of the drill pipe, the sealing component includes a protective sleeve, which is set at one end of the outer rod and the inner rod. The protective sleeve is set in two sections. A sealing ring and filler are provided between the inner wall of the protective sleeve and the outer rod, and one side of the sealing ring and filler is adapted to the outer wall of the outer rod.

[0009] Furthermore, to better ensure the sealing effect, O-rings are embedded at equal intervals on the inner wall of the packing, and the O-rings, packing, and outer wall of the inner rod are in contact.

[0010] Furthermore, to better ensure the sealing effect of the connection, the connecting components include connecting holes, which are symmetrically and evenly spaced on the protective sleeve. The connecting holes are equipped with connecting cylinders and connecting bolts, and the two sections of the protective sleeve are connected together by the connecting cylinders and connecting bolts.

[0011] Furthermore, in order to better ensure the protective effect of the drill pipe, the protective component includes a first protective layer and a second protective layer, which are respectively disposed on the outer wall of the outer rod and the inner wall of the inner rod.

[0012] Furthermore, to better ensure the protective effect, the outer rod and inner rod are adapted to the first protective layer and the second protective layer, respectively.

[0013] Furthermore, to better ensure the concentricity of the drill pipe, copper sleeves are installed at equal intervals between the outer and inner rods, and the copper sleeves are compatible with the outer and inner rods.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) By setting up sealing components, it is possible to effectively prevent downhole mud, oil and gas and other media from seeping into or out of the gap between the inside and outside of the drill pipe, thereby solving the problem that cement slurry can easily enter between the inside and outside of the drill pipe in the traditional process, greatly improving the stability and safety of the drilling process, extending the service life of the drill pipe and related equipment, and reducing maintenance costs and downtime caused by media seepage.

[0016] (2) By setting up protective components, the outer and inner rods can be well protected, effectively reducing wear on the inner and outer drill pipes during rotation, torque transmission, and the process of withstanding complex downhole environments. This reduces frictional resistance and avoids the problems of high friction and resistance between the outer and inner rods in traditional processes, further improving the service life and working efficiency of the drill pipes and ensuring the smooth progress of the drilling process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a bidirectional internal and external drill pipe sealing structure for wear prevention according to an embodiment of the present utility model;

[0019] Figure 2 This is a side sectional view of a bidirectional internal and external drill pipe sealing structure for wear prevention according to an embodiment of the present utility model;

[0020] Figure 3 This is a partial structural breakdown of a sealing assembly for a wear-resistant bidirectional internal and external drill pipe sealing structure according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 4 This is a partial structural breakdown of a sealing assembly for a wear-resistant bidirectional internal and external drill pipe sealing structure according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of a protective component structure for a bidirectional internal and external drill pipe sealing structure for wear prevention, according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Outer rod; 2. Inner rod; 3. Sealing assembly; 4. Protective assembly; 5. Protective sleeve; 6. Sealing ring; 7. Packing; 8. O-ring; 9. Connecting hole; 10. Connecting cylinder; 11. Connecting bolt; 12. First protective layer; 13. Second protective layer; 14. Copper sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] like Figures 1-4 As shown, a bidirectional internal and external drill rod sealing structure for wear prevention according to an embodiment of the present utility model includes a drill rod, which includes an outer rod 1, an inner rod 2, a sealing component 3, and a protective component 4. The outer rod 1 has a diameter of 180 x 16 mm, and the inner rod 2 has a diameter of 133 x 18 mm. The gap between the inner and outer rods is 7.5 mm. The matching motor has a power of 132 kW and a torque of 30,000 N·m. The piling depth does not exceed 30 meters, and the diameter is less than 1,000 mm.

[0028] In actual use, the specific connection between the two ends of the outer rod 1 and the inner rod 2 is based on existing conventional technical means, so it will not be described in detail here.

[0029] The sealing component 3 is set at one end of the outer rod 1 and the inner rod 2, and the protective component 4 is set on the outer rod 1 and the inner rod 2 respectively. The sealing component 3 includes a sealing component and a connecting component. Copper sleeves 14 are provided at equal distances between the outer rod 1 and the inner rod 2, and the copper sleeves 14 are adapted to the outer rod 1 and the inner rod 2.

[0030] The sealing component includes a protective sleeve 5, which is disposed at one end of the outer rod 1 and the inner rod 2. The protective sleeve 5 is configured as two sections. A sealing ring 6 and a filler 7 are disposed between the inner wall of the protective sleeve 5 and the outer rod 1 for sealing the outer rod 1. The sealing ring 6 and the filler 7 are both existing conventional materials, so they will not be described in detail. One side of the sealing ring 6 and the filler 7 is adapted to the outer wall of the outer rod 1. O-rings 8 are embedded at equal intervals on the inner wall of the filler 7 for sealing the inner rod 2. The O-rings 8 are existing conventional materials, so they will not be described in detail. The O-rings 8 and the filler 7 are in contact with the outer wall of the inner rod 2.

[0031] The connecting component includes connecting holes 9, which are symmetrically and evenly spaced on the protective sleeve 5. Connecting cylinders 10 and connecting bolts 11 are provided inside the connecting holes 9, and the two sections of the protective sleeve 5 are connected together by connecting cylinders 10 and connecting bolts 11.

[0032] Example 2:

[0033] like Figure 2 , Figure 5 As shown, according to an embodiment of the present invention, a bidirectional inner and outer drill rod sealing structure for wear prevention includes a protective component 4 comprising a first protective layer 12 and a second protective layer 13. The first protective layer 12 and the second protective layer 13 are respectively disposed on the outer wall of the outer rod 1 and the inner wall of the inner rod 2. The outer rod 1 and the inner rod 2 are respectively adapted to the first protective layer 12 and the second protective layer 13.

[0034] The first protective layer 12 and the second protective layer 13 are provided with toothed connection structures at the outer wall of the outer rod 1 and the inner wall of the inner rod 2. The first protective layer 12 and the second protective layer 13 are respectively composed of high entropy alloy and tungsten carbide.

[0035] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0036] In summary, with the help of the above-mentioned technical solution of this utility model, when the drill pipe starts to work, the outer rod 1 and the inner rod 2 rotate simultaneously and transmit torque. During this process, a certain gap will be formed between the outer rod 1 and the inner rod 2, and the sealing component 3 will start to play its role. Its protective sleeve 5 is set at one end of the outer rod 1 and the inner rod 2 and is divided into two sections. A sealing ring 6 and a filler 7 are provided between the inner wall of the protective sleeve 5 and the outer rod 1. The sealing ring 6 and the filler 7 are tightly attached to the outer wall of the outer rod 1 on one side, thereby forming a seal between the outer rod 1 and the protective sleeve 5. At the same time, O-rings 8 are embedded in the inner wall of the filler 7 at equal intervals. The O-rings 8 and the filler 7 are in close contact with the outer wall of the inner rod 2, forming a seal between the inner rod 2 and the protective sleeve 5. The connecting holes 9 are symmetrically opened at equal intervals on the protective sleeve 5. The connecting cylinder 10 and the connecting bolt 11 inside the connecting holes 9 firmly connect the two sections of the protective sleeve 5 together, ensuring that the sealing effect of the entire sealing component 3 is stable and reliable, and effectively preventing the seepage or leakage of mud, oil and gas and other media from the gap between the inside and outside of the drill pipe.

[0037] The protective component 4 also works synchronously. The first protective layer 12 is set on the outer wall of the outer rod 1, and the second protective layer 13 is set on the inner wall of the inner rod 2. The outer rod 1 is adapted to the first protective layer 12, and the inner rod 2 is adapted to the second protective layer 13. Copper sleeves 14 are set at equal distances between the outer rod 1 and the inner rod 2. The copper sleeves 14 are adapted to both the outer rod 1 and the inner rod 2. This not only helps to maintain the concentricity of the drill pipe, but also provides good protection for the outer rod 1 and the inner rod 2, reducing the wear of the inner and outer drill pipes during rotation, torque transmission, and exposure to complex downhole environments, and reducing frictional resistance. The first protective layer 12 is made of high-entropy alloy, and the second protective layer 13 is made of tungsten carbide. These two materials have excellent wear resistance and corrosion resistance, which can effectively resist the erosion of the outer rod 1 and the inner rod 2 by the complex downhole environment, further improving the service life and working efficiency of the drill pipe and ensuring the smooth progress of the drilling process.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional internal and external drill pipe seal structure for wear prevention, characterized by, The drill pipe includes an outer rod (1), an inner rod (2), a sealing component (3), and a protective component (4). The sealing component (3) is disposed at one end of the outer rod (1) and the inner rod (2), and the protective component (4) is disposed on the outer rod (1) and the inner rod (2) respectively. The sealing component (3) includes a sealing part and a connecting part.

2. The bidirectional inner and outer kelly bar seal structure of claim 1, wherein, The sealing component includes a protective sleeve (5), which is located at one end of the outer rod (1) and the inner rod (2). The protective sleeve (5) is divided into two sections. A sealing ring (6) and a filler (7) are provided between the inner wall of the protective sleeve (5) and the outer rod (1). One side of the sealing ring (6) and the filler (7) are adapted to the outer wall of the outer rod (1).

3. The bidirectional inner and outer kelly bar seal structure of claim 2, wherein, O-rings (8) are embedded in the inner wall of the packing (7) at equal intervals, and the O-rings (8), the packing (7) and the outer wall of the inner rod (2) are in contact.

4. The bidirectional inner and outer kelly bar seal structure of claim 3, wherein, The connecting component includes connecting holes (9), which are symmetrically and evenly spaced on the protective sleeve (5). The connecting holes (9) are provided with connecting cylinders (10) and connecting bolts (11), and the two sections of the protective sleeve (5) are connected together by connecting cylinders (10) and connecting bolts (11).

5. The bidirectional inner and outer kelly bar seal structure of claim 4, wherein, The protective component (4) includes a first protective layer (12) and a second protective layer (13), which are respectively disposed on the outer wall of the outer rod (1) and the inner wall of the inner rod (2).

6. The bidirectional inner and outer kelly bar seal structure of claim 5, wherein, The outer rod (1) and the inner rod (2) are respectively adapted to the first protective layer (12) and the second protective layer (13).

7. The bidirectional inner and outer kelly bar seal structure of claim 1, wherein, Copper sleeves (14) are provided at equal distances between the outer rod (1) and the inner rod (2), and the copper sleeves (14) are compatible with the outer rod (1) and the inner rod (2).

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