Anti-corrosion oil casing pipe with physical plating layer

Abstract

The utility model relates to the technical field of anti-corrosion oil casing pipes, and discloses an anti-corrosion oil casing pipe with a physical coating, which comprises an oil casing pipe main body and an anti-corrosion outer pipe, the outer side of the oil casing pipe main body is sleeved with an anti-puncture pipe body, and the outer side of the anti-puncture pipe body is fixedly sleeved with anti-corrosion assembly inner rings at equal intervals. According to the utility model, the plurality of anti-corrosion assembly inner rings are arranged between the anti-puncture pipe body and the anti-puncture outer pipe, the plurality of anti-corrosion assembly inner rings are mutually coupled and spliced into a whole, the tolerance and the anti-corrosion capability are good, the anti-corrosion assembly pipe is integrally spliced on the outer side of the anti-corrosion outer pipe, and the coupling outer ring is used for bearing and fixing; the oil casing anti-corrosion device is excellent in anti-impact protection effect and has corrosion resistance, the outer side of the anti-corrosion outer pipe and the outer side of the anti-corrosion assembly pipe are each provided with an anti-corrosion zinc coating, the double anti-corrosion capacity is achieved, and the device is excellent in anti-corrosion performance, good in anti-compression and anti-impact effect, capable of fully meeting the long-term anti-corrosion requirement of an oil casing and good in durability.

Description

Technical Field

[0001] This utility model relates to the field of anti-corrosion oil casing technology, specifically an anti-corrosion oil casing with a physical coating. Background Technology

[0002] In the process of oil and gas extraction, casing and tubing, as critical downhole equipment, are exposed to complex and harsh working environments for extended periods, facing severe corrosion problems. Corrosion of casing and tubing not only reduces their mechanical properties and service life, leading to frequent replacements and maintenance and increasing extraction costs, but it can also cause safety accidents such as oil and gas leaks, polluting the environment and causing significant economic losses and safety hazards to the energy extraction industry. Therefore, anti-corrosion treatment of casing and tubing is necessary to enhance their safety and stability.

[0003] Traditional anti-corrosion measures for oil casing mainly include the use of anti-corrosion coatings and corrosion-resistant alloy materials. However, ordinary anti-corrosion coatings are prone to peeling and damage under long-term high temperature, high pressure, and formation fluid erosion conditions, thus rendering the oil casing ineffective. Furthermore, their protective capabilities for the oil pipe are relatively insufficient, making it difficult to install them conveniently and stably. The corrosion resistance of the oil pipe is also inadequate, and its impact and pressure resistance are relatively insufficient, failing to fully meet the long-term anti-corrosion requirements of oil casing. Therefore, we propose an anti-corrosion oil casing with a physical coating to solve these problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an anti-corrosion oil casing with a physical coating, which has excellent corrosion resistance, good pressure and impact resistance, can fully meet the long-term anti-corrosion requirements of oil casing, and has good durability.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an anti-corrosion oil casing with a physical coating, comprising an oil casing body and an anti-corrosion outer tube, wherein an anti-puncture tube body is sleeved on the outside of the oil casing body;

[0008] The outer side of the puncture-resistant tube body is fitted with an anti-corrosion assembled inner ring at equal intervals. Two adjacent anti-corrosion assembled inner rings are spliced ​​together. The outer side of the anti-corrosion assembled inner ring is fitted with an anti-puncture outer tube. The anti-corrosion outer tube is fitted onto the outer side of the anti-puncture outer tube. The outer side of the anti-corrosion outer tube is provided with anti-corrosion assembled tubes arranged at equal intervals.

[0009] The two adjacent anti-corrosion assembled pipes are interlocked and spliced ​​together. Both the upper and lower ends of the anti-corrosion outer pipe are provided with coupling outer rings. Multiple anti-corrosion assembled pipes are limited and fixed between two coupling outer rings. The outer sides of the anti-corrosion outer pipe and the anti-corrosion assembled pipes are provided with a corrosion-resistant galvanized layer.

[0010] Preferably, the puncture-resistant outer tube and the puncture-resistant tube body are made of the same puncture-resistant material, and multiple anti-corrosion assembled inner rings are assembled together as one unit, and multiple anti-corrosion assembled tubes are assembled together as one unit.

[0011] Preferably, the upper and lower sides of the anti-corrosion assembly inner ring are fixedly connected with integrally formed fitting installation strips, the upper and lower adjacent fitting installation strips are staggered and interlocked with each other, and the adjacent anti-corrosion assembly inner rings are assembled and combined by fitting installation strips.

[0012] Preferably, the anti-corrosion assembled pipe includes a fitting assembled pipe and an arc-shaped physical protective layer. The arc-shaped physical protective layer is installed on the outside of the fitting assembled pipe. The fitting assembled pipe is sleeved at equal intervals on the outside of the anti-corrosion outer pipe. The fitting assembled pipe and the arc-shaped physical protective layer are an integral whole. Multiple fitting assembled pipes are limited and fixed between two coupling outer rings.

[0013] Preferably, a locking sealing sleeve is provided between adjacent fitting and assembly tubes, and multiple fitting and assembly tubes are sealed and assembled into a whole by the locking sealing sleeve.

[0014] Preferably, the outer ring of the coupling is fixed to the upper and lower ends of the anti-corrosion outer pipe, and a fixing inner strip is provided on the inner side of the outer ring of the coupling. The outer ring of the coupling is fastened and sealed to the anti-corrosion outer pipe and the anti-corrosion assembled pipe by the fixing inner strip.

[0015] Preferably, the inner side of the oil casing body is filled and fixed with a rigid corrosion-resistant tube, and the inner side of the rigid corrosion-resistant tube is provided with a ceramic corrosion-resistant tube.

[0016] Preferably, the inner side of the ceramic corrosion-resistant pipe is coated with an oil-resistant and corrosion-resistant coating.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides an anti-corrosion oil sleeve with a physical coating, which has the following beneficial effects:

[0019] 1. This anti-corrosion oil casing with a physical coating features an anti-puncture tube body and an anti-puncture outer tube on the outside of the main body, providing anti-puncture and anti-corrosion protection. Multiple anti-corrosion inner rings are coupled and spliced ​​together, offering excellent resistance and corrosion resistance. An anti-corrosion outer tube is also installed outside the anti-puncture outer tube, with the anti-corrosion splicing tube integrally spliced ​​to the outside of the anti-corrosion outer tube and secured by a coupling outer ring, providing excellent impact protection and corrosion resistance. Both the outer and outer sides of the anti-corrosion outer tube and the anti-corrosion splicing tube are coated with a corrosion-resistant galvanized layer. This double corrosion-resistant galvanized layer provides excellent corrosion resistance, resulting in superior corrosion resistance, good pressure and impact resistance, and fully meeting the long-term anti-corrosion requirements of the oil casing, ensuring good durability. Attached Figure Description

[0020] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a three-dimensional sectional view of the structure of this utility model.

[0022] Figure 3 This utility model Figure 2 Enlarged view of structure A;

[0023] Figure 4 This is a frontal perspective three-dimensional schematic diagram of the anti-corrosion assembly inner ring and the fitting installation strip connection structure of this utility model;

[0024] Figure 5 This is a frontal perspective three-dimensional schematic diagram of the connection structure between the fitting and splicing pipe and the snap-fit ​​sealing sleeve of this utility model;

[0025] Figure 6 This is a front sectional view of the connection structure of the fitting and splicing pipe and the snap-fit ​​sealing sleeve of this utility model.

[0026] In the diagram: 1. Oil casing body; 2. Corrosion-resistant outer tube; 3. Corrosion-resistant assembled inner ring; 4. Puncture-resistant outer tube; 5. Corrosion-resistant assembled tube; 51. Fitted assembled tube; 52. Arc-shaped physical protective layer; 53. Clamping sealing sleeve; 6. Coupling outer ring; 7. Corrosion-resistant galvanized layer; 8. Puncture-resistant tube body; 9. Fitted installation strip; 10. Fixing inner strip; 11. Rigid corrosion-resistant tube; 12. Ceramic corrosion-resistant tube. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-6 A corrosion-resistant oil casing with a physical coating includes an oil casing body 1 and a corrosion-resistant outer tube 2, with a puncture-resistant tube body 8 sleeved on the outside of the oil casing body 1.

[0029] The outer side of the puncture-resistant tube body 8 is fitted with anti-corrosion assembled inner rings 3 at equal intervals. Two adjacent anti-corrosion assembled inner rings 3 are spliced ​​together. The outer side of the anti-corrosion assembled inner ring 3 is fitted with an anti-puncture outer tube 4. The anti-corrosion outer tube 2 is fitted on the outer side of the anti-puncture outer tube 4. The outer side of the anti-corrosion outer tube 2 is provided with anti-corrosion assembled tubes 5 arranged at equal intervals.

[0030] Two adjacent anti-corrosion assembled pipes 5 are interlocked and spliced ​​together. Both the upper and lower ends of the anti-corrosion outer pipe 2 are provided with coupling outer rings 6. Multiple anti-corrosion assembled pipes 5 are limited and fixed between the two coupling outer rings 6. The outer sides of the anti-corrosion outer pipe 2 and the anti-corrosion assembled pipes 5 are provided with corrosion-resistant zinc plating layer 7.

[0031] The beneficial effects of this solution are as follows: By providing an anti-puncture tube body 8 and an anti-puncture outer tube 4 on the outside of the main body 1 of the oil casing, the anti-puncture and anti-corrosion functions are achieved. Multiple anti-corrosion assembled inner rings 3 are provided between the anti-puncture tube body 8 and the anti-puncture outer tube 4. Adjacent anti-corrosion assembled inner rings 3 are connected to each other by a fitting installation strip 9. Multiple anti-corrosion assembled inner rings 3 are coupled and spliced ​​together as a whole, which can stably carry out anti-corrosion operations. Moreover, the anti-corrosion assembled inner ring 3 itself is annular and has good pressure resistance.

[0032] The outer side of the puncture-resistant outer tube 4 is equipped with an anti-corrosion outer tube 2, which provides good anti-corrosion protection for the outside of the oil pipe and prevents external corrosion of the pipeline. The outer side of the anti-corrosion outer tube 2 is equipped with an anti-corrosion assembly tube 5, which is spliced ​​together and fixed by the outer ring of the coupling. It has excellent impact protection and corrosion resistance. Both the outer side of the anti-corrosion outer tube 2 and the anti-corrosion assembly tube 5 are equipped with a corrosion-resistant galvanized layer 7. The double corrosion-resistant galvanized layer 7 has excellent corrosion resistance, making the device have excellent corrosion resistance, good pressure resistance and impact resistance, which can fully meet the long-term anti-corrosion requirements of the oil casing and has good durability.

[0033] Furthermore, the puncture-resistant outer tube 4 and the puncture-resistant tube body 8 are made of the same puncture-resistant material, and multiple anti-corrosion assembled inner rings 3 are assembled together as one unit, and multiple anti-corrosion assembled tubes 5 are assembled together as one unit.

[0034] By setting both the puncture-proof outer tube 4 and the puncture-proof tube body 8 to be made of the same puncture-proof material, the anti-leakage and anti-puncture effect is good, and it is suitable for use as an internal filling material. In addition, multiple anti-corrosion assembled inner rings 3 are assembled together as one unit, which has good installation tightness and improves pressure resistance. Multiple anti-corrosion assembled tubes 5 are assembled together as one unit, forming a tubular shape with good durability.

[0035] Furthermore, both the upper and lower sides of the anti-corrosion assembly inner ring 3 are fixedly connected with integrally formed fitting installation strips 9. The upper and lower adjacent fitting installation strips 9 are staggered and interlocked with each other. The adjacent anti-corrosion assembly inner rings 3 are assembled and combined by fitting installation strips 9.

[0036] By setting the fitting installation strip 9, it is easy to couple and splice adjacent anti-corrosion assembly inner rings 3, which has a good installation and fixing effect, is convenient to assemble, and is suitable for use. In the event of damage to a single anti-corrosion assembly inner ring 3, it can be easily removed and replaced to make it usable. It is relatively simple and convenient to use.

[0037] Furthermore, the anti-corrosion assembled pipe 5 includes a fitting assembled pipe 51 and an arc-shaped physical protective layer 52. The arc-shaped physical protective layer 52 is installed on the outside of the fitting assembled pipe 51. The fitting assembled pipe 51 is sleeved on the outside of the anti-corrosion outer pipe 2 at equal intervals. The fitting assembled pipe 51 and the arc-shaped physical protective layer 52 are an integral whole. Multiple fitting assembled pipes 51 are limited and fixed between two coupling outer rings 6.

[0038] By setting up the anti-corrosion assembly pipe 5, which includes the bonding assembly pipe 51 and the arc-shaped physical protective layer 52, the bonding assembly pipe 51 is bonded and spliced ​​to the outside of the anti-corrosion outer pipe 2, and the arc-shaped physical protective layer 52 provides impact protection. The bonding assembly pipe 51 and the arc-shaped physical protective layer 52 are an integral whole, which further improves the resistance and makes the anti-corrosion assembly pipe 5 have good pressure resistance and endurance.

[0039] Furthermore, a snap-fit ​​sealing sleeve 53 is provided between adjacent fitting and splicing tubes 51, and multiple fitting and splicing tubes 51 are sealed and assembled into a whole by the snap-fit ​​sealing sleeve 53;

[0040] By setting the snap-fit ​​sealing sleeve 53, multiple fitting and splicing pipes 51 are sealed and assembled into a whole by the snap-fit ​​sealing sleeve 53, which has good overall sealing performance, is not easy to leak and corrode, and has excellent pressure resistance and protection performance.

[0041] Furthermore, the coupling outer ring 6 is fixed to the upper and lower ends of the anti-corrosion outer pipe 2, and the inner side of the coupling outer ring 6 is provided with a fixing inner strip 10. The coupling outer ring 6 is fastened and sealed to the anti-corrosion outer pipe 2 and the anti-corrosion assembled pipe 5 by the fixing inner strip 10.

[0042] By setting the outer ring 6 of the coupling to fix the coupling at both ends of the anti-corrosion outer pipe 2, the installation and fixing work can be carried out stably. The inner fixing strip 10 plays an auxiliary role in sealing and fixing, so that when the outer ring 6 of the coupling fixes the anti-corrosion assembled pipe 5, the connection has good sealing performance and is not easy to leak liquid, making it highly practical.

[0043] Furthermore, a rigid corrosion-resistant tube 11 is filled and fixed inside the main body 1 of the oil casing, and a ceramic corrosion-resistant tube 12 is provided inside the rigid corrosion-resistant tube 11.

[0044] By setting up a rigid corrosion-resistant pipe 11 and a ceramic corrosion-resistant pipe 12, good resistance and rigid load-bearing capacity are achieved. The ceramic corrosion-resistant pipe 12 has good resistance to oil and excellent corrosion protection capability.

[0045] Furthermore, the inner side of the ceramic corrosion-resistant pipe 12 is coated with an oil-resistant and corrosion-resistant coating.

[0046] By applying oil-resistant and corrosion-resistant coatings, corrosion protection is achieved, further improving the pipeline's durability.

[0047] Working principle: By providing an anti-puncture tube body 8 and an anti-puncture outer tube 4 on the outside of the oil casing body 1, it plays a role in preventing puncture and corrosion. Multiple anti-corrosion assembled inner rings 3 are provided between the anti-puncture tube body 8 and the anti-puncture outer tube 4. Adjacent anti-corrosion assembled inner rings 3 are connected to each other by a fitting installation strip 9. Multiple anti-corrosion assembled inner rings 3 are coupled and spliced ​​together as one, which can stably carry out anti-corrosion operation. Moreover, the anti-corrosion assembled inner ring 3 itself is annular and has good pressure resistance.

[0048] The outer side of the puncture-resistant outer tube 4 is equipped with an anti-corrosion outer tube 2, which provides good anti-corrosion protection for the outside of the oil pipe and prevents external corrosion of the pipeline. The outer side of the anti-corrosion outer tube 2 is equipped with an anti-corrosion assembly tube 5, which is spliced ​​together and fixed by the outer ring of the coupling. It has excellent impact protection and corrosion resistance. Both the outer side of the anti-corrosion outer tube 2 and the anti-corrosion assembly tube 5 are equipped with a corrosion-resistant galvanized layer 7. The double corrosion-resistant galvanized layer 7 has excellent corrosion resistance, making the device have excellent corrosion resistance and good pressure and impact resistance. It can fully meet the long-term anti-corrosion requirements of the oil casing and has good durability. It solves the problem that the oil pipe is not good enough in terms of corrosion resistance, and at the same time, the oil pipe's impact and pressure resistance is relatively insufficient, which cannot fully meet the long-term anti-corrosion requirements of the oil casing and has good durability.

[0049] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant oil casing with a physical coating, comprising an oil casing body (1) and a corrosion-resistant outer tube (2), characterized in that: The outer side of the oil casing body (1) is fitted with a puncture-resistant tube body (8); The anti-puncture tube body (8) is fixed with anti-corrosion assembled inner rings (3) at equal intervals on the outside. Two adjacent anti-corrosion assembled inner rings (3) are spliced ​​together. The anti-puncture outer tube (4) is sleeved on the outside of the anti-corrosion assembled inner ring (3). The anti-corrosion outer tube (2) is sleeved on the outside of the anti-puncture outer tube (4). Anti-corrosion assembled tubes (5) are arranged at equal intervals on the outside of the anti-corrosion outer tube (2). Two adjacent anti-corrosion assembly pipes (5) are interlocked and spliced ​​together. Both ends of the anti-corrosion outer pipe (2) are provided with coupling outer rings (6). Multiple anti-corrosion assembly pipes (5) are limited and fixed between two coupling outer rings (6). The outer sides of the anti-corrosion outer pipe (2) and the anti-corrosion assembly pipes (5) are provided with corrosion-resistant zinc plating layer (7).

2. The anti-corrosion oil sleeve with a physical coating according to claim 1, characterized in that: The puncture-resistant outer tube (4) and the puncture-resistant tube body (8) are made of the same puncture-resistant material. Multiple anti-corrosion assembled inner rings (3) are assembled together as one unit, and multiple anti-corrosion assembled tubes (5) are assembled together as one unit.

3. The anti-corrosion oil sleeve with a physical coating according to claim 1, characterized in that: The upper and lower sides of the anti-corrosion assembly inner ring (3) are fixedly connected with integrally formed fitting installation strips (9). The upper and lower adjacent fitting installation strips (9) are staggered and interlocked. The upper and lower adjacent fitting installation strips (9) are fitted and snapped together. The adjacent anti-corrosion assembly inner rings (3) are assembled and combined by fitting installation strips (9).

4. The anti-corrosion oil sleeve with a physical coating according to claim 1, characterized in that: The anti-corrosion assembly pipe (5) includes a fitting assembly pipe (51) and an arc-shaped physical protective layer (52). The arc-shaped physical protective layer (52) is installed on the outside of the fitting assembly pipe (51). The fitting assembly pipe (51) is sleeved on the outside of the anti-corrosion outer pipe (2) at equal intervals. The fitting assembly pipe (51) and the arc-shaped physical protective layer (52) are an integral whole. Multiple fitting assembly pipes (51) are limited and fixed between two coupling outer rings (6).

5. The anti-corrosion oil sleeve with a physical coating according to claim 4, characterized in that: A locking sealing sleeve (53) is provided between adjacent fitting and assembly tubes (51), and multiple fitting and assembly tubes (51) are sealed and assembled into a whole by the locking sealing sleeve (53).

6. The anti-corrosion oil sleeve with a physical coating according to claim 1, characterized in that: The coupling outer ring (6) is fixed to the upper and lower ends of the anti-corrosion outer pipe (2). The inner side of the coupling outer ring (6) is provided with a fixing inner strip (10). The coupling outer ring (6) is tightly sealed to the anti-corrosion outer pipe (2) and the anti-corrosion assembled pipe (5) by the fixing inner strip (10).

7. The anti-corrosion oil sleeve with a physical coating according to claim 1, characterized in that: The inner side of the oil casing body (1) is filled with a rigid corrosion-resistant tube (11), and the inner side of the rigid corrosion-resistant tube (11) is provided with a ceramic corrosion-resistant tube (12).

8. The anti-corrosion oil sleeve with a physical coating according to claim 7, characterized in that: The inner side of the ceramic corrosion-resistant pipe (12) is coated with an oil-resistant and corrosion-resistant coating.

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