Hollow composite sleeve with sealing structure

Abstract

The utility model discloses a hollow composite casing pipe with a sealing structure, which comprises a composite casing pipe main body, the composite casing pipe main body comprises a protective inner pipe and a reinforcing outer pipe, a detachable structure is arranged between the protective inner pipe and the reinforcing outer pipe, the protective inner pipe comprises an aluminum alloy wrapping pipe, a glass fiber heat insulation pipe and a hard plastic inner pipe, and a sealing structure is arranged between the reinforcing outer pipe and the protective inner pipe. The protective inner pipe in the hollow composite sleeve is subjected to composite reinforcement design, and the aluminum alloy wrapping pipe, the glass fiber heat insulation pipe and the hard plastic inner pipe are arranged to wrap and protect the hollow composite sleeve layer by layer, so that the hollow composite sleeve has good structural strength and hardness and is not prone to deformation and damage, and the service life of the hollow composite sleeve is prolonged. And meanwhile, a sealing structure is arranged between the reinforcing outer pipe and the protective inner pipe and used for achieving a good sealing protection effect, the phenomenon of leakage at the clamping position of the protective inner pipe and the reinforcing outer pipe is prevented, and the sealing performance of casing pipe installation is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite casings, in particular to a hollow composite casing with a sealing structure. Background Art

[0002] With the continuous development of the energy industry at home and abroad and the increasing demand for oil and gas resources in society, the conditions of oil wells in major oil-producing areas at home and abroad are becoming increasingly severe, and there are more and more oil and gas wells in corrosive conditions. At present, the main protection method for oil and gas wells in corrosive environments is to use corrosion-resistant oil casing. The pipes are mostly made of solid stainless steel. Due to their high manufacturing cost, the procurement cost of oil fields remains high.

[0003] A Chinese patent document with authorization publication number CN211083177U discloses a composite oil casing with a sealing ring structure. The composite oil casing comprises two composite oil casing sections connected by a coupling. Each composite oil casing section includes a base pipe and a stainless steel inner liner fitted onto the base pipe. Both ends of the inner liner are provided with outer flanges folded outward at right angles. The two base pipes are designated as base pipe 1 and base pipe 2, and the two inner liners are designated as inner liner 1 and inner liner 2. The end of inner liner 1 is provided with an inner liner 1 outer flange, and the end of inner liner 2 is provided with an inner liner 2 outer flange. A metal sealing ring is provided on the inner surface of the coupling. The adjacent outer flanges of inner liner 1 and inner liner 2 abut against the two end faces of the metal sealing ring, forming a position-limiting seal. This effectively prevents the inner liner from moving within the base pipe and leaking oil and other substances from the inner liner, protecting the composite oil casing from corrosion. The cost is significantly lower than that of oil casing made of integral stainless steel materials, and it has broad application prospects.

[0004] When the inner and outer tubes of the sleeve in the prior art are installed, there are problems such as poor sealing at the connection part and inconvenient installation and fixing. Therefore, it is necessary to develop a hollow composite sleeve with a sealing structure. Utility Model Content

[0005] The purpose of the utility model is to provide a hollow composite casing with a sealing structure to solve the problem of poor sealing at the connection part and inconvenient installation and fixing of the casing in the prior art proposed in the above background art when the inner and outer pipes are installed.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hollow composite casing with a sealing structure, comprising a composite casing body, wherein the composite casing body comprises a protective inner tube and a reinforced outer tube, and a detachable structure is provided between the protective inner tube and the reinforced outer tube, wherein the protective inner tube comprises an aluminum alloy sheathed tube, a glass fiber insulation tube and a hard plastic inner tube, and a sealing structure is provided between the reinforced outer tube and the protective inner tube.

[0007] Preferably, the sealing structure includes a sealing rubber ring, a sealing ferrule, and an annular rubber sleeve.

[0008] Preferably, an annular groove is provided on the outer surface of the protective inner tube, and the sealing rubber ring, the sealing sleeve and the annular rubber sleeve are all tightly fitted and fixed in the annular groove.

[0009] Preferably, the reinforced outer tube includes a first outer tube body and a second outer tube body, and the interiors of the first outer tube body and the second outer tube body are both provided with groove structures.

[0010] Preferably, the first outer tube body and the second outer tube body are tightly fitted with the outer surfaces of the sealing sleeve and the annular rubber sleeve through a groove structure.

[0011] Preferably, the first outer tube body and the second outer tube body are provided with sealing patches, the sealing patches are tightly fitted with the protective inner tube, and one end of the protective inner tube is provided with a flange structure.

[0012] Preferably, the aluminum alloy tube is wrapped around the outer surface of the fiberglass insulation tube, and the hard plastic inner tube is arranged on the inner surface of the fiberglass insulation tube.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model implements a composite reinforcement design for the internal protective inner tube of the hollow composite casing, and wraps and protects it layer by layer by arranging an aluminum alloy sheath tube, a glass fiber insulation tube and a hard plastic inner tube, so that it has good structural strength and hardness and is not prone to deformation and damage. At the same time, a sealing structure is provided between the reinforced outer tube and the protective inner tube, which is used to achieve a good sealing protection effect, prevent leakage at the clamping part of the protective inner tube and the reinforced outer tube, and effectively improve the sealing performance of the casing installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the explosive decomposition structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the protective inner tube of the present invention.

[0018] In the figure: 1. Reinforced outer tube; 2. Composite casing body; 3. Protective inner tube; 4. Sealing rubber ring; 5. First outer tube body; 6. Sealing patch; 7. Groove structure; 8. Second outer tube body; 9. Annular groove; 10. Sealing sleeve; 11. Annular rubber sleeve; 12. Flange structure; 13. Aluminum alloy tube; 14. Fiberglass insulation tube; 15. Hard plastic inner tube. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-3 The utility model provides an embodiment: a hollow composite casing with a sealing structure, including a composite casing body 2, the composite casing body 2 includes a protective inner tube 3 and a reinforced outer tube 1, the protective inner tube 3 and the reinforced outer tube 1 are provided with a detachable structure, the protective inner tube 3 includes an aluminum alloy sheathed tube 13, a glass fiber insulation tube 14 and a hard plastic inner tube 15, and a sealing structure is provided between the reinforced outer tube 1 and the protective inner tube 3.

[0021] Furthermore, the sealing structure includes a sealing rubber ring 4, a sealing ferrule 10, and an annular rubber sleeve 11. The outer surface of the protective inner tube 3 is provided with an annular groove 9. The sealing rubber ring 4, the sealing ferrule 10, and the annular rubber sleeve 11 are all tightly fitted and fixed to the annular groove 9, thereby tightly fitting and sealing the outer surface of the protective inner tube 3, making it less likely for leakage to occur at the connection between the inner and outer tubes.

[0022] Furthermore, the reinforced outer tube 1 includes a first outer tube body 5 and a second outer tube body 8. A groove structure 7 is provided inside the first outer tube body 5 and the second outer tube body 8. The first outer tube body 5 and the second outer tube body 8 are tightly fitted with the outer surfaces of the sealing sleeve 10 and the annular rubber sleeve 11 through the groove structure 7, thereby facilitating better fitting and fixing of the reinforced outer tube 1 and the sealing structure, thereby achieving the advantages of tight connection and good sealing effect.

[0023] Furthermore, a sealing patch 6 is provided on the first outer tube body 5 and the second outer tube body 8. The sealing patch 6 fits tightly with the protective inner tube 3, further strengthening the tightness of the connection between the protective inner tube 3 and the reinforced outer tube 1. A flange structure 12 is provided at one end of the protective inner tube 3 to facilitate connection and fixation with other pipes.

[0024] Furthermore, the aluminum alloy sheathing tube 13 is wrapped around the outer surface of the fiberglass insulation tube 14, and the hard plastic inner tube 15 is arranged on the inner surface of the fiberglass insulation tube 14, so that the protective inner tube 3 can be wrapped and protected layer by layer, so that it has good structural strength and hardness and is not prone to deformation and damage.

[0025] Working principle: When in use, the composite casing body 2 includes a protective inner tube 3 and a reinforced outer tube 1. The protective inner tube 3 includes an aluminum alloy tube 13, a glass fiber insulation tube 14 and a hard plastic inner tube 15. The aluminum alloy tube 13 is wrapped and arranged on the outer surface of the glass fiber insulation tube 14, and the hard plastic inner tube 15 is arranged on the inner surface of the glass fiber insulation tube 14, so that the protective inner tube 3 can be wrapped and protected layer by layer, so that it has good structural strength and hardness and is not prone to deformation and damage. A sealing structure is provided between the reinforced outer tube 1 and the protective inner tube 3. The sealing structure includes a sealing rubber ring 4, a sealing sleeve 10, and an annular rubber sleeve 11. The outer surface of the protective inner tube 3 is provided with a sealing ring 4, a sealing sleeve 10, and a ring-shaped rubber sleeve 11. There is an annular groove 9, and the sealing rubber ring 4, the sealing sleeve 10, and the annular rubber sleeve 11 are all tightly fitted and fixed with the annular groove 9, so that the outer surface of the protective inner tube 3 can be tightly fitted and sealed to protect it, so that leakage is not likely to occur at the connection between the inner and outer tubes. The reinforced outer tube 1 includes a first outer tube body 5 and a second outer tube body 8. The first outer tube body 5 and the second outer tube body 8 are both provided with a groove structure 7. The first outer tube body 5 and the second outer tube body 8 are tightly fitted with the outer surfaces of the sealing sleeve 10 and the annular rubber sleeve 11 through the groove structure 7, so as to facilitate better fitting and fixing of the reinforced outer tube 1 and the sealing structure, thereby achieving the advantages of tight connection and good sealing effect.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature bolts, rivets, welding, etc. in the existing technology. In addition, the machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0028] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow composite casing with a sealing structure, comprising a composite casing body (2), characterized in that: The composite casing body (2) comprises a protective inner tube (3) and a reinforced outer tube (1); a detachable structure is formed between the protective inner tube (3) and the reinforced outer tube (1); the protective inner tube (3) comprises an aluminum alloy sheathed tube (13), a glass fiber insulation tube (14) and a hard plastic inner tube (15); and a sealing structure is provided between the reinforced outer tube (1) and the protective inner tube (3).

2. The hollow composite casing with a sealing structure according to claim 1, characterized in that: The sealing structure comprises a sealing rubber ring (4), a sealing sleeve (10), and an annular rubber sleeve (11).

3. The hollow composite casing with a sealing structure according to claim 2, characterized in that: The outer surface of the protective inner tube (3) is provided with an annular groove (9), and the sealing rubber ring (4), the sealing sleeve (10), and the annular rubber sleeve (11) are all tightly fitted and fixed to the annular groove (9).

4. The hollow composite casing with a sealing structure according to claim 1, characterized in that: The reinforced outer tube (1) comprises a first outer tube body (5) and a second outer tube body (8), and the interiors of the first outer tube body (5) and the second outer tube body (8) are both provided with groove structures (7).

5. The hollow composite casing with a sealing structure according to claim 4, characterized in that: The first outer tube body (5) and the second outer tube body (8) are tightly fitted to the outer surfaces of the sealing sleeve (10) and the annular rubber sleeve (11) via the groove structure (7).

6. The hollow composite casing with a sealing structure according to claim 5, characterized in that: The first outer tube body (5) and the second outer tube body (8) are provided with sealing patches (6), the sealing patches (6) are tightly fitted with the protective inner tube (3), and one end of the protective inner tube (3) is provided with a flange structure (12).

7. The hollow composite casing with a sealing structure according to claim 1, characterized in that: The aluminum alloy sheathing tube (13) is wrapped around the outer surface of the glass fiber insulation tube (14), and the hard plastic inner tube (15) is arranged on the inner surface of the glass fiber insulation tube (14).

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