In-place subsea pipe stand pipe lining repairing and connecting device and using method

Abstract

The invention discloses an in-place subsea pipe stand pipe lining repairing and connecting device and a using method. The in-place subsea pipe stand pipe lining repairing and connecting device comprises a subsea pipe stand pipe, a lining pipe is coaxially arranged in the subsea pipe stand pipe, the first end of the lining pipe is arranged in the subsea pipe stand pipe, the second end of the lining pipe is exposed out of the subsea pipe stand pipe, an inner sleeve is arranged in the second end of the lining pipe, and an outer sleeve is arranged outside the second end of the lining pipe; the inner sleeve, the lining pipe and the outer sleeve are coaxially arranged, and the subsea pipe stand pipe, the outer sleeve, the inner sleeve and the process pipeline are sequentially connected through connecting pieces. The connecting mode of the large-wall-thickness and high-pressure submarine pipeline lining connector is achieved, the wedge-shaped clamping mechanism and the reverse wedge-shaped clamping mechanism are adopted, the connector does not lose efficacy under the condition that the lining pipe is under the bursting pressure of 15 Mpa, and the reliability of connector connection in the neck bush repairing process is powerfully guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of submarine pipeline riser repair, and in particular relates to an in-situ repair connection device for a submarine pipeline riser liner and a usage method thereof. Background Art

[0002] Submarine pipelines are important facilities for offshore oil and gas transportation. As of now, large-scale offshore oil and gas development has exceeded 20 years, and some submarine pipelines have approached or exceeded their service life. Currently, the conventional treatment method is to replace this part of the submarine pipeline, which is time-consuming, laborious, and has a high replacement cost.

[0003] With the continuous development of new technologies, at present, such pipelines can be repaired by methods such as internal coating, internal lining, or internal insertion. Among them, the internal lining method involves re-laying a non-metallic flexible pipeline inside the existing steel pipeline. Therefore, the internal lining method involves the joint problem between the flexible hose and the steel pipeline.

[0004] At present, the patent application document CN117685445A proposes a connection device and method for internal lining repair joints of thermal pipelines, which is equipped with a detachable semi-circular fastening hoop, combined with fastening bolts and fine-tuning compression bolts. The above method can meet the installation and fixation of thermal pipeline internal lining repair pipelines. However, the maximum pressure of thermal pipelines does not exceed 0.8 Mpa, and submarine oil and gas pipelines usually adopt a large wall thickness structure, and the working pressure is not less than 7 Mpa. Therefore, it is necessary to design a new type of pipeline connection device to solve the technical problem that the above joints can withstand high pressures. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide an in-situ repair connection device for a submarine pipeline riser liner and a usage method thereof, which realizes the connection method of the internal lining joints of submarine pipelines with large wall thickness and high pressure, and effectively guarantees the reliability of the joint connection during the repair process of the inner lining sleeve.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: an in-situ repair connection device for a submarine pipeline riser liner, including a submarine pipeline riser, an inner lining pipe is coaxially arranged inside the submarine pipeline riser, the first end of the inner lining pipe is placed inside the submarine pipeline riser, the second end of the inner lining pipe exposes outside the submarine pipeline riser, an inner sleeve is arranged inside the second end of the inner lining pipe, an outer sleeve is arranged outside the second end of the inner lining pipe, the inner sleeve, the inner lining pipe, and the outer sleeve are coaxially arranged, and the submarine pipeline riser, the outer sleeve, the inner sleeve, and the process pipeline are sequentially connected through connecting pieces.

[0007] Furthermore, the inner lining pipe is a flexible composite hose, and the outer wall of the inner lining pipe closely adheres to the inner wall of the submarine pipeline riser.

[0008] Further, the inner sleeve includes a wedge-shaped sleeve and a connecting flange. The wedge-shaped sleeve is cylindrical. The connecting flange includes a first connecting flange and a second connecting flange. The first connecting flange is disposed at the end of the wedge-shaped sleeve, and the second connecting flange is disposed in the middle of the wedge-shaped sleeve near the end of the first connecting flange. The first connecting flange and the second connecting flange are arranged in parallel.

[0009] Further, the outer sleeve includes an anti-wedge-shaped sleeve, which cooperates with the wedge-shaped sleeve. The anti-wedge-shaped sleeve is cylindrical. A third connecting flange is provided at one end of the anti-wedge-shaped sleeve, and a fourth connecting flange is provided near the end at the other end of the anti-wedge-shaped sleeve. The third connecting flange and the fourth connecting flange are arranged in parallel.

[0010] Further, the subsea pipeline riser includes a subsea pipeline riser body, which is cylindrical. A fifth connecting flange is provided at one end of the subsea pipeline riser body.

[0011] Further, the process pipeline includes a process pipeline body, which is cylindrical. A sixth connecting flange is provided at one end of the process pipeline body.

[0012] Further, the connecting member is a bolt. The bolt includes a first group of bolts, a second group of bolts, and a third group of bolts. The first group of bolts respectively connect the third connecting flange and the fifth connecting flange. The second group of bolts respectively connect the fourth connecting flange and the second connecting flange. The third group of bolts respectively connect the first connecting flange and the sixth connecting flange.

[0013] Further, the number of the first group of bolts, the second group of bolts, and the third group of bolts is 8 each.

[0014] Further, the present invention also provides a method for using the in-situ subsea pipeline riser lining repair connection device. Using the above-mentioned in-situ subsea pipeline riser lining repair connection device, it includes the following steps.

[0015] S1: Lining pipe dragging. Send the dragging cable to the end of the subsea pipeline riser through the pig launcher, and drag the lining pipe to the end of the subsea pipeline riser through the traction winch. One end of the lining pipe exposes the end face of the subsea pipeline riser.

[0016] S2: First, pass the lining pipe through the outer sleeve, and then insert the inner sleeve into the lining pipe.

[0017] S3: Lock the outer sleeve. Fasten the fourth connecting flange and the second connecting flange through bolts. Utilize the wedge-shaped space between the inner sleeve and the outer sleeve to tightly press the lining pipe, so that the inner sleeve and the outer sleeve are tightly connected.

[0018] S4: Connect the subsea pipeline riser, and fasten the fifth connecting flange and the third connecting flange with bolts to tightly connect the outer sleeve and the subsea pipeline riser.

[0019] S5: Connect the process pipeline, and fasten the first connecting flange and the sixth connecting flange with bolts to tightly connect the inner sleeve and the process pipeline.

[0020] Further, in the step S1, the lining pipe protrudes 800 mm from the end face of the subsea pipeline riser.

[0021] The advantages and positive effects of the present invention are as follows:

[0022] The present invention realizes the connection method of the lining joint of the subsea pipeline with large wall thickness and high pressure. The present invention adopts a wedge-shaped and anti-wedge-shaped clamping mechanism. Under the blasting pressure condition of 15 Mpa, the joint does not fail, which effectively guarantees the reliability of the joint connection during the lining sleeve repair process. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the lining pipe of an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the inner sleeve of an embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the outer sleeve of an embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the subsea pipeline riser of an embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the structure of the process pipeline of an embodiment of the present invention.

[0029] In the figure:

[0030] 1. Subsea pipeline riser; 1-1. Subsea pipeline riser body; 1-2. Fifth connecting flange;

[0031] 2. Lining pipe;

[0032] 3. Outer sleeve; 3-1. Anti-wedge-shaped sleeve; 3-2. Third connecting flange; 3-3. Fourth connecting flange;

[0033] 4. Inner sleeve; 4-1. Wedge-shaped sleeve; 4-2. First connecting flange; 4-3. Second connecting flange;

[0034] 5. Process pipeline; 5-1. Process pipeline body; 5-2. Sixth connecting flange;

[0035] 6. First set of bolts;

[0036] 7. Second set of bolts;

[0037] 8. Third set of bolts. Detailed implementation manner

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] The following further describes the embodiments of the present invention with reference to the accompanying drawings:

[0042] As Figure 1 shown, an in-situ repair connection device for the inner lining of a subsea pipeline riser includes a subsea pipeline riser 1. An inner lining pipe 2 is coaxially arranged inside the subsea pipeline riser 1. The first end of the inner lining pipe 2 is placed inside the subsea pipeline riser 1, and the second end of the inner lining pipe 2 extends outside the subsea pipeline riser 1. An inner sleeve 4 is arranged inside the second end of the inner lining pipe 2, and an outer sleeve 3 is arranged outside the second end of the inner lining pipe 2. The inner sleeve 4, the inner lining pipe 2, and the outer sleeve 3 are coaxially arranged. The subsea pipeline riser 1, the outer sleeve 3, the inner sleeve 4, and the process pipeline 5 are sequentially connected through connectors.

[0043] As Figure 2As shown, the inner liner 2 is a flexible composite hose with a working pressure of not less than 7 MPa and a burst pressure of not less than 15.5 MPa. The inner liner 2 is placed in the subsea pipeline riser 1 through a pulling scheme, and the outer wall of the inner liner 2 is closely attached to the inner wall of the subsea pipeline riser 1.

[0044] As Figure 3 shown, the inner sleeve 4 includes a wedge-shaped sleeve 4-1 and a connecting flange. The wedge-shaped sleeve 4-1 is cylindrical and is placed in the inner liner 2. The connecting flange includes a first connecting flange 4-2 and a second connecting flange 4-3. The first connecting flange 4-2 is welded at the end of the wedge-shaped sleeve 4-1, and the second connecting flange 4-3 is welded near the end of the first connecting flange 4-2 in the middle of the wedge-shaped sleeve 4-1. The first connecting flange 4-2 and the second connecting flange 4-3 are arranged in parallel. As Figure 1 shown, the first connecting flange 4-2 and the sixth connecting flange 5-2 are connected by a third set of bolts 8 to realize the connection between the inner sleeve 4 and the process pipeline 5. The second connecting flange 4-3 and the fourth connecting flange 3-3 are connected by a second set of bolts 7 to realize the connection between the inner sleeve 4 and the outer sleeve 3.

[0045] As Figure 4 shown, the outer sleeve 3 includes an anti-wedge-shaped sleeve 3-1. The anti-wedge-shaped sleeve 3-1 cooperates with the wedge-shaped sleeve 4-1. The anti-wedge-shaped sleeve 3-1 is placed outside the wedge-shaped sleeve 4-1, and the inner liner 2 is in the middle of them. The anti-wedge-shaped sleeve 3-1 is cylindrical. A third connecting flange 3-2 is provided at one end of the anti-wedge-shaped sleeve 3-1, and a fourth connecting flange 3-3 is provided near the end at the other end of the anti-wedge-shaped sleeve 3-1. The third connecting flange 3-2 and the fourth connecting flange 3-3 are arranged in parallel. The third connecting flange 3-2 and the fifth connecting flange 1-2 are connected by a first set of bolts 6 to realize the connection between the outer sleeve 3 and the subsea pipeline riser 1. The fourth connecting flange 3-3 and the second connecting flange 4-3 are connected by a second set of bolts 7 to realize the connection between the inner sleeve 4 and the outer sleeve 3.

[0046] As Figure 5 shown, the subsea pipeline riser 1 includes a subsea pipeline riser body 1-1. The subsea pipeline riser body 1-1 is cylindrical. The inner liner 2 is placed in the subsea pipeline riser body 1-1 through a pulling method. A fifth connecting flange 1-2 is provided at one end of the subsea pipeline riser body 1-1 by welding. The fifth connecting flange 1-2 and the third connecting flange 3-2 are connected by a first set of bolts 6 to realize the connection between the outer sleeve 3 and the subsea pipeline riser 1.

[0047] As Figure 6 shown, the process pipeline 5 includes a process pipeline body 5-1. The process pipeline body 5-1 is cylindrical. A sixth connecting flange 5-2 is provided at one end of the process pipeline body 5-1 by welding. The sixth connecting flange 5-2 and the first connecting flange 4-2 are connected by a third set of bolts 8 to realize the connection between the inner sleeve 4 and the process pipeline 5.

[0048] As shown Figure 1 in the figure, the connecting member is a bolt, and the bolt includes a first group of bolts 6, a second group of bolts 7 and a third group of bolts 8. The first group of bolts 6 are respectively connected to the third connecting flange 3-2 and the fifth connecting flange 1-2. The second group of bolts 7 are respectively connected to the fourth connecting flange 3-3 and the second connecting flange 4-3. The third group of bolts 8 are respectively connected to the first connecting flange 4-2 and the sixth connecting flange 5-2. Specifically, the number of the first group of bolts 6, the second group of bolts 7 and the third group of bolts 8 provided in this embodiment is 8 each.

[0049] The present invention also provides a method for using an in-situ repair connection device for a submarine pipeline riser lining. Using the above-mentioned in-situ repair connection device for a submarine pipeline riser lining, it includes the following steps:

[0050] S1: Dragging the lining pipe 2. Send the dragging cable to one end of the submarine pipeline riser 1 through a pig launcher, and drag the lining pipe 2 to one end of the submarine pipeline riser 1 through a traction winch. One end of the lining pipe 2 exposes 800 mm from the end face of the submarine pipeline riser 1.

[0051] S2: First, pass the lining pipe 2 through the outer sleeve 3, and then insert the inner sleeve 4 into the lining pipe 2, with an insertion depth of 800 mm.

[0052] S3: Lock the outer sleeve 3. Fasten the fourth connecting flange 3-3 and the second connecting flange 4-3 through bolts. By evenly tightening 8 bolts, utilize the wedge-shaped space between the inner sleeve 4 and the outer sleeve 3 to tightly press the lining pipe 2, so that the inner sleeve 4 and the outer sleeve 3 are tightly connected.

[0053] S4: Connect the submarine pipeline riser 1. Fasten the fifth connecting flange 1-2 and the third connecting flange 3-2 through bolts. By evenly tightening 8 bolts, make the outer sleeve 3 and the submarine pipeline riser 1 tightly connected.

[0054] S5: Connect the process pipeline 5. Fasten the first connecting flange 4-2 and the sixth connecting flange 5-2 through bolts. By evenly tightening 8 bolts, make the inner sleeve 4 and the process pipeline 5 tightly connected.

[0055] The advantages and positive effects of the present invention are:

[0056] The present invention realizes the connection method of the lining joint of the submarine pipeline with large wall thickness and high pressure. The present invention adopts a wedge-shaped and anti-wedge-shaped clamping mechanism. Under the blasting pressure condition of 15 Mpa of the lining pipe 2, the joint does not fail. The present invention effectively guarantees the reliability of the joint connection during the lining sleeve repair process.

[0057] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. An in-situ repair connection device for the inner lining of a subsea pipeline riser, characterized in that: It includes a subsea pipeline riser, and an inner liner is coaxially arranged inside the subsea pipeline riser. The first end of the inner liner is placed inside the subsea pipeline riser, and the second end of the inner liner extends out of the subsea pipeline riser. An inner sleeve is arranged inside the second end of the inner liner, and an outer sleeve is arranged outside the second end of the inner liner. The inner sleeve, the inner liner, and the outer sleeve are coaxially arranged. The subsea pipeline riser, the outer sleeve, the inner sleeve, and the process pipeline are sequentially connected through connectors.

2. The in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 1, characterized in that: The inner liner is a flexible composite hose, and the outer wall of the inner liner closely adheres to the inner wall of the subsea pipeline riser.

3. The in-situ submarine pipeline riser lining repair connection device according to claim 1 or 2, characterized in that: The inner sleeve includes a wedge-shaped sleeve and a connecting flange. The wedge-shaped sleeve is cylindrical. The connecting flange includes a first connecting flange and a second connecting flange. The first connecting flange is placed at the end of the wedge-shaped sleeve, and the second connecting flange is placed in the middle of the wedge-shaped sleeve near the first connecting flange end. The first connecting flange and the second connecting flange are arranged in parallel.

4. The in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 3, wherein: The outer sleeve includes an anti-wedge-shaped sleeve. The anti-wedge-shaped sleeve cooperates with the wedge-shaped sleeve. The anti-wedge-shaped sleeve is cylindrical. A third connecting flange is arranged at one end of the anti-wedge-shaped sleeve, and a fourth connecting flange is arranged near the end at the other end of the anti-wedge-shaped sleeve. The third connecting flange and the fourth connecting flange are arranged in parallel.

5. The in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 1 or 2, characterized in that: The subsea pipeline riser includes a subsea pipeline riser body. The subsea pipeline riser body is cylindrical. A fifth connecting flange is arranged at one end of the subsea pipeline riser body.

6. The in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 1 or 2, characterized in that: The process pipeline includes a process pipeline body. The process pipeline body is cylindrical. A sixth connecting flange is arranged at one end of the process pipeline body.

7. The in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 1 or 2, characterized in that: The connector is a bolt. The bolt includes a first group of bolts, a second group of bolts, and a third group of bolts. The first group of bolts respectively connect the third connecting flange and the fifth connecting flange. The second group of bolts respectively connect the fourth connecting flange and the second connecting flange. The third group of bolts respectively connect the first connecting flange and the sixth connecting flange.

8. A repair connection device for in-situ lining of a subsea pipeline riser according to claim 7, characterized in that: The number of the first group of bolts, the second group of bolts, and the third group of bolts is 8 each.

9. A method for using an in-situ repair connection device for the inner lining of a subsea pipeline riser, which utilizes the in-situ repair connection device for the inner lining of a subsea pipeline riser according to any one of claims 1 to 8, characterized in that: It includes the following steps S1: Dragging the inner liner. Send the dragging cable to the end of the subsea pipeline riser through a pig launcher, and drag the inner liner to the end of the subsea pipeline riser through a traction winch. One end of the inner liner extends out of the end face of the subsea pipeline riser. S2: First, pass the inner liner through the outer sleeve, and then insert the inner sleeve into the inner liner. S3: Lock the outer sleeve. Fasten the fourth connecting flange and the second connecting flange through bolts. Utilize the wedge-shaped space between the inner sleeve and the outer sleeve to tightly press the inner liner, so that the inner sleeve and the outer sleeve are tightly connected. S4: Connect the subsea pipeline riser. Fasten the fifth connecting flange and the third connecting flange through bolts to tightly connect the outer sleeve and the subsea pipeline riser. S5: Connect the process pipeline. Fasten the first connecting flange and the sixth connecting flange through bolts to tightly connect the inner sleeve and the process pipeline.

10. The method of using an in-situ repair connection device for the inner lining of a subsea pipeline riser according to claim 9, characterized in that: In S1, the inner liner extends 800 mm out of the end face of the subsea pipeline riser.

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