Multi-layer continuous pipe

Abstract

The utility model discloses a multi-layer continuous pipe, which relates to the technical field of petroleum industry, and one or more continuous pipes are placed in the outermost continuous pipe of the multi-layer continuous pipe. According to the multi-layer continuous pipe disclosed by the utility model, various different materials can be transported, and the efficiency is higher during underground operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum industry, especially relates to a multilayer continuous pipe. BACKGROUND

[0002] The continuous pipe is a continuous single length not less than 61m (can reach several hundred meters, thousands of meters or even ten thousand meters length) flexible pipe, which can be coiled on the corresponding reel for transportation and used for downhole operation in the petroleum industry. SUMMARY

[0003] The utility model provides a multilayer continuous pipe, solve above -mentioned problem.

[0004] The utility model provides a multilayer continuous pipe, one or more continuous pipes are placed in the outermost layer continuous pipe of the multilayer continuous pipe, there is a cavity between the two adjacent continuous pipes, and the shape of the cavity is freely adjusted according to the relative position between the continuous pipes.

[0005] Optionally, one or more continuous pipes are placed between any two continuous pipes of the multilayer continuous pipe.

[0006] Optionally, the continuous pipes of the multilayer continuous pipe are nested layer by layer according to the diameter of the continuous pipe.

[0007] Optionally, the cavity is formed between any two adjacent continuous pipes by the inner wall of the outer continuous pipe and the outer wall of the inner continuous pipe.

[0008] Optionally, the continuous pipes are concentrically or eccentrically distributed.

[0009] Optionally, the material of the continuous pipe is metal material, non-metal material or composite material.

[0010] Optionally, the continuous pipe is provided with a cable.

[0011] Optionally, the cable is placed in one or more continuous pipes.

[0012] Optionally, the cable includes an electric cable and / or an optical cable.

[0013] Optionally, the continuous pipe is provided with one or more cables.

[0014] The utility model has the advantages that the utility model provides a multilayer continuous pipe, and the multilayer continuous pipe can transport various materials, and the efficiency is higher during downhole operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1The utility model provides a kind of horizontal cross section of multilayer continuous tube for embodiment 1 of the utility model.

[0016] Figure 2 The utility model provides a kind of horizontal cross section of multilayer continuous tube for embodiment 2 of the utility model.

[0017] Figure 3 The utility model provides a kind of longitudinal cross section of multilayer continuous tube for embodiment 2 of the utility model.

[0018] Figure 4 The utility model provides a kind of horizontal cross section of multilayer continuous tube for embodiment 3 of the utility model.

[0019] Figure 5 The utility model provides a kind of horizontal cross section of multilayer continuous tube for embodiment 4 of the utility model.

[0020] Figure 6 The utility model provides a kind of horizontal cross section of multilayer continuous tube for embodiment 5 of the utility model. Specific implementation

[0021] The technical scheme in the utility model will be described clearly and completely in the drawings in the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment.Based on the embodiment in the utility model, all other embodiments obtained by the skilled in the art without making creative labor belong to the range of protection of the utility model. Embodiment 1

[0022] The utility model provides a kind of multilayer continuous tube, including multilayer (two layers or more than two layers) continuous tube;Two adjacent continuous tubes have cavity between, the shape of cavity is freely adjusted according to the relative position variation between each layer continuous tube.

[0023] Preferably, one or more continuous tubes are placed in the outermost continuous tube of the multilayer continuous tube.

[0024] It should be noted that the multilayer in the utility model is two layers or more than two layers;More than two is two or more than two.

[0025] Preferably, one or more continuous tubes are placed between any two continuous tubes of the multilayer continuous tube.

[0026] Preferably, the cavity is formed between any two adjacent continuous tubes by the inner wall of the outer continuous tube and the outer wall of the inner continuous tube.

[0027] Preferably, each layer of continuous tube is concentrically distributed or eccentrically distributed.

[0028] Preferably, the material of the continuous tube is metal material or non-metal material or composite material.

[0029] Preferably, the continuous tube houses a cable.

[0030] The cable in the utility model is a general term for optical cable, electric cable and the like, which can be a single electric cable, a single optical cable or a combination of electric cable and optical cable. The electric cable is a wire product used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. The optical cable is a communication cable assembly using one or more optical fibers placed in a cladding sheath as a transmission medium and can be used individually or in groups.

[0031] Preferably, the cable is placed in one or more continuous tubes.

[0032] Preferably, the cable comprises an electric cable and / or an optical cable.

[0033] Preferably, the continuous tube houses one or more cables.

[0034] The utility model discloses a multi-layer continuous tube, which can transport various materials and has higher efficiency in underground operation. Embodiment 2

[0035] As shown in Figures 1-3 The embodiment provides a 5-layer continuous tube with different thicknesses and embedded cables, which is composed of continuous tube 1-1, continuous tube 2-1, continuous tube 3-1, continuous tube 4-1 and continuous tube 5-1. The continuous tube 1-1 is the innermost continuous tube, and the continuous tube 1-1 is provided with a 4-core cable 6-1.

[0036] In the embodiment, the cable can be a single-core wire, a multi-core (two-core and more than two-core) cable, or an optical cable or other cable. The embedded cable can have an insulating outer skin or be a separate and independent dispersed cable.

[0037] The outer wall of the continuous tube 1-1 and the inner wall of the continuous tube 2-1 form an annular cavity. This cavity serves as a fluid channel throughout the continuous tube.

[0038] The cavity between the outer wall of the continuous tube 2-1 and the inner wall of the continuous tube 3-1 is also a fluid channel.

[0039] The cavity between the outer wall of the continuous tube 3-1 and the inner wall of the continuous tube 4-1 is also a fluid channel.

[0040] The cavity between the outer wall of the continuous tube 4-1 and the inner wall of the continuous tube 5-1 is also a fluid channel.

[0041] The continuous tube 5-1 is the outermost layer of the whole multi-layer continuous tube, and contains and protects all the internal continuous tubes and cables. Thus the multi-layer continuous tube can transport materials using the cavity between two layers of continuous tubes and transmit signals using the built-in cable.

[0042] In the utility model, the multi-layer continuous tube is free inside, and the continuous tubes in different layers can be concentrically distributed as shown in Figure 1 or eccentrically distributed as shown in Figure 2 . In addition, no righting mechanism is arranged between the continuous tubes, so that the continuous tubes can be curled with smaller curvature, and stress concentration of the continuous tubes is avoided (when the righting mechanism is arranged inside the continuous tube, the bending degree of the whole continuous tube is greatly affected. Because the continuous tube is long, it is usually curled for transportation. When the multi-layer continuous tube is coiled into a circle, the circle formed by the geometric center line is of the same diameter, but the diameters of the continuous tubes in different layers are different, so that the arc lengths of the continuous tubes in different layers are different when the continuous tubes in different layers are coiled into circles of the same diameter along the same geometric center line, that is, the actual lengths required are different. If the righting mechanism is arranged, the lengths of the continuous tubes in different layers are not uniform when the multi-layer tube is coiled or stretched. In addition, if the lengths of the continuous tubes are forced to be uniform, stress concentration will occur in the righting mechanism, and the service life of the continuous tube is greatly reduced.

[0043] In the utility model, because the continuous tubes in different layers are free, the shape of the cavity between the continuous tubes is freely adjusted according to the relative positions of the continuous tubes in different layers, so that the multi-layer continuous tube can be curved with an arc by slightly changing the positions of the continuous tubes in different layers in the coiled state or the stretched state, so as to automatically adjust and consume the length error between the continuous tubes with different diameters. In addition, because the diameters of the continuous tubes are not changed, whether the continuous tubes are concentric or not does not change the size of the cavity between the continuous tubes, so that the fluid passing through is not affected.

[0044] The cable is arranged in the innermost coiled tubing of the coiled tubing, so that the cable can transmit signals while conveying materials, and the cable is also protected to the maximum extent. In the oil industry, the conditions under the formation are very complex and changeable, there are high temperatures, corrosive fluids, and sharp-edged gravel, which are all very dangerous to the cable and can change the properties of the cable. The corrosive fluid can easily damage the cable or destroy the insulation layer of the cable. The sharp-edged gravel can also cut and destroy the cable. Therefore, when the cable has to be used in the formation, the cable needs to be protected in multiple ways. The utility model places the cable in the innermost coiled tubing of the coiled tubing, uses the innermost coiled tubing as a cable channel, and the outer coiled tubing can also protect the cable, which not only provides very comprehensive protection for the cable, but also facilitates the replacement of the cable and the maintenance and replacement.

[0045] The utility model provides a kind of multi-layer coiled tubing of built-in cable, innermost coiled tubing is built-in cable, can use the cavity between two coiled tubings to transport material, uses built-in cable to transmit signal, so that coiled tubing can transmit electronic signal while conveying material. Example 3

[0046] As Figure 4 shown, the embodiment provides a 5-layer coiled tubing with different thicknesses of built-in cable, which is nested and combined layer by layer according to the diameter size, including coiled tubing 1-2, coiled tubing 2-2, coiled tubing 3-2, coiled tubing 4-2 and coiled tubing 5-2, coiled tubing 1-2 is the innermost coiled tubing, 4-core cable 6-2 is arranged in coiled tubing 1-2, 3-core cable 6-3 is arranged in the cavity between coiled tubing 4-2 and coiled tubing 3-2, and 6-core cable 6-4 is arranged in the cavity between coiled tubing 4-2 and coiled tubing 5-2.

[0047] In this embodiment, the cable can be a single-core wire, a multi-core (two-core and more) cable, or an optical cable or other cable. The built-in cable can have an insulating outer skin or be a separate and independent dispersed cable.

[0048] The outer wall of coiled tubing 1-2 and the inner wall of coiled tubing 2-2 form an annular cavity. This cavity serves as a fluid channel throughout the coiled tubing.

[0049] The cavity between the outer wall of coiled tubing 2-2 and the inner wall of coiled tubing 3-2 is also a fluid channel.

[0050] The cavity between the outer wall of coiled tubing 3-2 and the inner wall of coiled tubing 4-2 is also a fluid channel.

[0051] The cavity between the outer wall of coiled tubing 4-2 and the inner wall of coiled tubing 5-2 is also a fluid channel.

[0052] The outermost layer of the whole continuous tube 5-2 contains and protects all the internal continuous tubes and cables. Thus the continuous tube can transport materials using the cavity between two layers of continuous tubes and transmit signals using the built-in cable.

[0053] In this embodiment, no centralizing mechanism is provided between the internal layers of the multi-layer continuous tube to ensure that the center of each layer is always at the same point. Therefore, the internal layers of the multi-layer continuous tube are free, and the layers of continuous tubes can be concentrically distributed or Figure 4 differently distributed as shown. Moreover, no centralizing mechanism is provided between the layers of the multi-layer continuous tube, which allows the continuous tube to be curled with smaller curvature and avoids stress concentration of the continuous tube. When a centralizer is installed inside the continuous tube, the flexibility of the whole continuous tube is greatly affected. Since the continuous tube is long, it is usually curled for transportation. When the multi-layer continuous tube is wound into a circle, the circle formed by the geometric center line is of the same diameter. However, the diameters of the layers of continuous tubes are different, which results in different arc lengths when the layers of continuous tubes are wound into a circle with the same diameter along the same geometric center line, i.e., the actual lengths required are different. If a centralizing mechanism is provided, this will result in different lengths of the inner and outer layers when the multi-layer continuous tube is wound or stretched. In addition, if the lengths of the continuous tubes are forced to be uniform, the centralizer will cause stress concentration of the continuous tube, which greatly reduces the service life of the continuous tube.

[0054] In this embodiment, since the layers of continuous tubes are in a free state, the shape of the cavity between the continuous tubes is freely adjusted according to the relative positions of the layers of continuous tubes. Therefore, whether in the wound state or in the stretched state, the multi-layer continuous tube can be curved with a small curvature by slightly changing the positions of the different layers of continuous tubes, thereby automatically adjusting and consuming the length error between the continuous tubes of different diameters. In addition, since the diameters of the continuous tubes do not change, whether the continuous tubes are concentric or not does not change the size of the cavity between the two layers of continuous tubes, and thus does not affect the flow of fluid.

[0055] The cable is placed in the continuous tube of the continuous tube or the cavity of the two sleeved continuous tubes, so that the cable can transmit signals while conveying materials, and the cable can be protected to the maximum extent. In the oil industry, the conditions under the formation are very complex and changeable, with high temperature, corrosive fluid and sharp gravel, which are very dangerous to the cable and can change the properties of the cable. Corrosive fluid can easily damage the cable or damage the insulation layer of the cable. Sharp gravel can also cut and damage the cable. Therefore, when the cable has to be used in the formation, it needs to be protected multiple times. In this embodiment, the cable is placed in the continuous tube of the continuous tube, and the continuous tube is used as a cable channel and can protect the cable. The cable is not only very comprehensive, but also can be easily replaced, and the maintenance and replacement are convenient.

[0056] The embodiment provides a continuous tube with a built-in cable, which comprises a plurality of continuous tubes, and the cable is built in the continuous tube. The continuous tube can be used to convey materials and transmit electronic signals. Embodiment 4

[0057] As shown in Figure 5 The embodiment provides a four-layer continuous tube with different thicknesses and a built-in cable, which comprises continuous tube 1-3, continuous tube 2-3, continuous tube 3-3 and continuous tube 4-3; the continuous tube 2-3 and the continuous tube 3-3 are arranged adjacent to each other and sleeved in the continuous tube 4-3. The continuous tube 1-3 is provided with a 4-core cable 6-5; the continuous tube 2-3 and the continuous tube 3-3 and the continuous tube 4-3 form a cavity, and the cavity is provided with a 3-core cable 6-6.

[0058] In this embodiment, the cable can be a single-core wire, a multi-core (two-core and more than two-core) cable, or other cables such as optical cables. The built-in cable can have an insulating outer skin or be a separate and independent dispersed cable.

[0059] The outer wall of the continuous tube 1-3 and the inner wall of the continuous tube 2-3 form an annular cavity. This cavity serves as a fluid channel throughout the continuous tube.

[0060] The cavity between the outer wall of the continuous tube 2-3, the outer wall of the continuous tube 3-3 and the inner wall of the continuous tube 4-3 is also a fluid channel.

[0061] The continuous tube 3-3 is also a fluid channel.

[0062] The continuous tube 4-3 is the outermost layer of the entire continuous tube, which contains and protects all the internal continuous tubes and cables.

[0063] In this embodiment, the interior of the multi-layer continuous tube is free, without any straightening structure, and the layers of continuous tubes can be distributed arbitrarily. Furthermore, the absence of a straightening structure between the multi-layer continuous tubes allows the continuous tubes to bend with a smaller curvature, thus avoiding stress concentration in the continuous tubes.

[0064] In this embodiment, since each layer of continuous tubes is in a free state, the shape of the cavity between the continuous tubes can be freely adjusted according to the relative positions of the continuous tubes. Therefore, whether in a coiled or stretched state, the multi-layer continuous tube can become curved by slightly changing the positions of the different continuous tubes, thereby automatically adjusting and absorbing the length error between continuous tubes of different thicknesses. Furthermore, since the diameter of the continuous tube itself does not change, the size of the cavity between the continuous tubes does not change, and therefore does not affect the flow of fluid.

[0065] The cable is housed within a continuous tube or its cavity within a continuous tube, allowing for signal transmission while simultaneously conveying materials, and maximizing cable protection. In the oil industry, underground conditions are extremely complex and variable, including high temperatures, corrosive fluids, and sharp-edged rocks. These conditions pose significant risks to cables, altering their properties. Corrosive fluids can easily damage cables or break their insulation. Sharp rocks can sever or destroy cables. Therefore, when cables must be used underground, multiple layers of protection are necessary. In this embodiment, the cable is placed within a continuous tube of a continuous tube, using the continuous tube as a cable channel and also protecting the cable. This provides comprehensive protection for the cable and facilitates easy cable replacement, maintenance, and replacement.

[0066] This embodiment provides a continuous tube with built-in cable. The continuous tube has a built-in cable, which can be used to transport materials while also transmitting electronic signals. Example 5

[0067] like Figure 6 As shown, this embodiment provides two nested continuous tubes of different thicknesses, including continuous tubes 1-4 and continuous tubes 2-4.

[0068] Continuous tube 1-4 serves as the fluid channel throughout the entire continuous tube.

[0069] There is an annular cavity between the outer wall of continuous tube 1-4 and the inner wall of continuous tube 2-4. This cavity serves as a fluid channel throughout the entire continuous tube.

[0070] This utility model provides a multi-layer continuous pipe, which can transport a variety of different materials and improve the efficiency of downhole operations.

[0071] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement that can be easily thought of by any person skilled in the art within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-layered continuous tube characterized by, The outermost layer of the multi-layer continuous tube is placed with one or more continuous tubes; the adjacent two layers of continuous tubes have cavities, and the shape of the cavities is freely adjusted according to the relative position between the layers of continuous tubes.

2. The multi-layered continuous tube of claim 1, wherein, Any two layers of the multi-layer continuous tube are placed with one or more continuous tubes.

3. The multi-layered continuous tube of claim 1, wherein, The layers of the multi-layer continuous tube are nested according to the diameters of the continuous tubes.

4. The multi-layered continuous tube of claim 3, wherein, Any two adjacent continuous tubes form a cavity through the inner wall of the outer continuous tube and the outer wall of the inner continuous tube.

5. The multi-layered continuous tube of claim 1, wherein, The layers of continuous tubes are concentrically or eccentrically distributed.

6. The multi-layered continuous tube of claim 1, wherein, The material of the continuous tube is metal material, non-metal material or composite material.

7. The multi-layer pipe of any of claims 1-6, wherein, The continuous tube is placed with a cable.

8. The multi-layered continuous tube of claim 7, wherein, The cable is placed in one or more layers of continuous tubes.

9. The multi-layered continuous tube of claim 7, wherein, The cable includes an electric cable and / or an optical cable.

10. The multi-layered continuous tube of claim 7, wherein, The continuous tube is placed with one or more cables.

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