Device for simulating subsea pipeline annular airspace perfusion repair

Abstract

The utility model discloses a device for simulating subsea pipeline annulus space perfusion repair, which comprises a jacket simulation structure, an annulus simulation structure and a retracting and releasing device, and a water tank is arranged on the inner bottom surface of the jacket simulation structure; the annulus simulation structure is arranged in the jacket simulation structure and comprises a vertical pipe and a protective pipe, the protective pipe sleeves the outer side of the vertical pipe, an annulus is formed between the protective pipe and the vertical pipe, and the lower ends of the protective pipe and the vertical pipe extend into the water tank; and the retracting and releasing device is arranged above the annulus simulation structure and is used for retracting and releasing the annulus tool into the annulus. The vertical pipe annulus corrosion repairing device can simulate repairing of vertical pipe annulus corrosion, selection of filling materials and verification of a construction process, and has a guiding effect on repairing of vertical pipe annulus corrosion.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field development, in particular to a device for simulating injection and repair of sea pipe annulus. Background Art

[0002] Offshore oil and gas in my country has approached 40% of domestic oil and gas production, and offshore oil and gas is an important successor to land production. The sea pipe riser is a special structure for offshore oil and gas production, connecting the submarine pipeline and the oil production platform. Usually, in order to protect the riser, a protective pipe structure is used on the outside of the riser. Due to the long-term influence of wave flow and tides, this structure increases the risk of corrosion. In order to solve such problems, it is necessary to seal the annular space of the protective pipe and the riser. First, it is necessary to find a suitable filling material, and secondly, to complete the cleaning of the riser annulus and make a test device simulating the offshore structure. Therefore, a land simulation test device is urgently needed. Utility Model Content

[0003] The utility model provides a device for simulating injection repair of annular space of a sea pipe, which can simulate the annular space area of ​​a riser and a protective pipe and the sealing effect of sealing treatment.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A device for simulating injection repair of an annulus of a subsea pipeline, comprising:

[0006] A catheter rack simulation structure, wherein a water tank is provided on the inner bottom surface of the catheter rack simulation structure;

[0007] an annulus simulation structure, the annulus simulation structure is arranged in the jacket simulation structure, the annulus simulation structure comprises a riser and a protective pipe, the protective pipe is sleeved outside the riser, an annulus is formed between the protective pipe and the riser, and the lower ends of the protective pipe and the riser extend into the water tank;

[0008] A retracting and releasing device is arranged above the annulus simulation structure, and is used for retracting and releasing annulus tools into the annulus.

[0009] Optionally, the jacket simulation structure includes:

[0010] A main structure, wherein the water tank is arranged on the inner bottom surface of the main structure;

[0011] An operating platform is arranged above the main structure, and the retractable device is arranged above the operating platform.

[0012] Optionally, a process window is provided on the upper portion of the outer peripheral wall of the protective tube.

[0013] Optionally, a protective pipe support frame is provided on the inner side wall of the main structure, and the protective pipe support frame is connected to the outer peripheral wall of the protective pipe.

[0014] Optionally, the retractable device comprises:

[0015] Winch, two of the winches are arranged above the catheter frame simulation structure, and the stroke of the winch is controlled by a stepping motor and a counter;

[0016] Traction ropes, two of which are respectively wound around corresponding winches, and the winches drive the corresponding traction ropes to be retracted and released;

[0017] A hanging flange, both ends of which are respectively connected to the lower ends of the two traction ropes, and the hanging flange is used to carry an annular tool into the annular space.

[0018] Optionally, the annulus tool includes a cleaning tool, a detection tool, a plugging air bag and a bottom support.

[0019] Optionally, the riser length is 7000 mm and the protective pipe length is 6000 mm.

[0020] Optionally, the liquid in the water tank submerges the annular space simulation structure by 600 mm.

[0021] Optionally, the jacket simulation structure further includes:

[0022] A support frame is obliquely supported on the outside of the main structure.

[0023] In summary, the technical effects and advantages of the utility model are as follows: the application can simulate the repair of riser annulus corrosion, the selection of filling materials and the verification of construction technology, and has a guiding role in the repair of riser annulus corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of a device for simulating injection repair of annular space of a subsea pipe in one embodiment of the utility model;

[0026] Figure 2 This is a front view of the main structure and the operating platform in one embodiment of the utility model;

[0027] Figure 3It is a left view of the main structure and the operating platform in one embodiment of the utility model;

[0028] Figure 4 It is a top view of a suspension flange in one embodiment of the utility model.

[0029] Among them: 1. water tank; 2. riser; 3. protective pipe; 4. main structure; 5. operating platform; 6. process window; 7. support frame; 8. protective pipe support frame; 9. winch; 10. traction rope; 11. suspension flange; 12. lifting ear; 13. hanging ring; 14. connecting hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] This embodiment provides a device for simulating the repair of the annular space of a submarine pipeline by injection, such as Figure 1-3 As shown, it includes a jacket simulation structure, an annulus simulation structure and a retracting device. A water tank 1 is provided on the inner bottom surface of the jacket simulation structure; the annulus simulation structure is arranged inside the jacket simulation structure, and the annulus simulation structure includes a riser 2 and a protective pipe 3, the protective pipe 3 is sleeved on the outside of the riser 2, an annulus is formed between the protective pipe 3 and the riser 2, and the lower ends of the protective pipe 3 and the riser 2 extend into the water tank 1; the retracting device is arranged above the annulus simulation structure, and the retracting device is used to retract and release the annulus tool into the annulus.

[0033] In this embodiment, the annulus simulation structure includes a riser 2 and a protective pipe 3, whose structure, size and material are the same as those of the offshore riser and protective pipe, so as to achieve the sealing of the simulated annulus area and filling material on land.

[0034] Optionally, the jacket simulation structure includes a main structure 4 and an operating platform 5, the water tank 1 is arranged on the inner bottom surface of the main structure 4; the operating platform 5 is arranged above the main structure 4, and the retracting device is arranged above the operating platform 5. The main structure 4 and the operating platform 5 can be frame structures to provide effective support for other structures, and the sides of the main structure 4 and the operating platform 5 can be closed or not. Guardrails are set on the operating platform 5 to ensure safe operation. A partition is set between the main structure 4 and the operating platform 5, and the partition is provided with a through hole for the annular simulation structure to pass through.

[0035] Optionally, a process window 6 is provided on the upper portion of the outer peripheral wall of the protective tube 3. The process windows 6 may be two process windows 6 arranged opposite to each other. The process windows 6 are used for the installation and inspection of the annular tool.

[0036] Optionally, the jacket simulation structure further includes a support frame 7, and the support frame 7 is tilted and supported on the outside of the main structure 4. The support frame 7 supports the main structure 4. In this embodiment, the main structure 4, the operating platform 5 and the support frame 7 are welded. A straight ladder is also provided on the side walls of the main structure 4 and the operating platform 5, and the straight ladder can reach the operating platform 5.

[0037] Optionally, a protective pipe support frame 8 is provided on the inner side wall of the main structure 4, and the protective pipe support frame 8 is connected to the outer peripheral wall of the protective pipe 3. The installation of the annular space simulation structure is realized by the protective pipe support frame 8, the outer side of the protective pipe support frame 8 is welded to the inner side wall of the main structure 4, and a support plate for connecting the outer peripheral wall of the protective pipe 3 can be provided on the inner side of the protective pipe support frame 8.

[0038] Optionally, the retracting and releasing device includes a winch 9, a traction rope 10 and a hanging flange 11, and the two winches 9 are arranged above the jacket simulation structure, and the winch 9 controls the stroke by a stepper motor and a counter. Controlling the stroke by a stepper motor and a counter belongs to the prior art and will not be repeated here; the two traction ropes 10 are respectively wound on the corresponding winches 9, and the winch 9 drives the traction ropes 10 to be retracted and released; the two ends of the hanging flange 11 are respectively connected to the lower ends of the two traction ropes 10, and the hanging flange 11 is used to carry the annular tool into the annular space. During the lowering process, the hanging flange 11 falls together with the annular tool in the annular space.

[0039] Optionally, the annulus tool includes a cleaning tool, a detection tool, a plugging airbag and a bottom support, etc. The annulus tools in this embodiment are all existing equipment and will not be described in detail here. The cleaning tool is used to clean the annulus, such as a high-pressure water nozzle, a rotating ring, a cutting blade and a grinding disc. The detection tool is used to obtain the annulus conditions, such as siltation, rust, etc. The detection tool mainly refers to a video device. The plugging airbag is used to support and seal. The plugging airbag is arranged above the bottom support. The bottom support is used to temporarily support the plugging airbag and filling materials. The plugging airbag is not inflated when it is lowered, and it is inflated after it is lowered into place. The annulus tool is placed into the annulus by the winch 9, the traction rope 10 and the suspension flange 11, and the speed of its lowering and lifting is controlled by the winch 9.

[0040] In this embodiment, the suspension flange 11 belongs to the existing structure, and the suspension flange 11 can adopt a 4-petal structure, such as Figure 4 As shown, two lifting ears 12 are provided at each end of the suspension flange 11, and the two lifting ears 12 at each end are connected by a connecting rope, and the connecting rope is provided with a hanging ring 13 connected to the traction rope 10. Four connecting holes 14 are provided on the suspension flange 11, and the annular tool is connected to the traction rope 10 through the connecting holes 14 and the auxiliary rope. The above is the prior art, and the specific process is not repeated. The suspension flange 11 is assembled into a ring in the annulus, and can carry cleaning tools, detection tools, and lower plugging airbags and bottom brackets.

[0041] The filling process in this embodiment is the same as the existing offshore sealing filling construction process, which is used to verify the existing offshore construction process, including: after the annulus of the protective pipe riser is cleaned, the bottom bracket is assembled below the hanging flange 11 through the process window 6; the plugging airbag is wrapped around the riser 2 and placed on the bottom bracket; the plugging airbag nozzle is connected to the air supply pipe; the winch 9 is started to release the traction rope 10 to move downward by the bottom bracket and the plugging airbag; when the bottom bracket and the plugging airbag move to the specified position, the plugging airbag is inflated; when the inflation pressure reaches the predetermined pressure, the air supply pipe and the plugging airbag are automatically separated; when the plugging airbag is inflated, the bottom bracket is separated, and the winch 9 is controlled to recycle the traction rope 10; then the filling material is filled into the annulus of the protective pipe 3 and the riser 2 by the injection tool. When the filling material is injected at first, it is in a fluid state, and the filling material is supported by the plugging airbag and the bottom bracket. After solidification, the filling material is in a solid state, and the plugging airbag and the bottom bracket are also left in the annulus after solidification. The filling material can be a polymer material, an elastomeric material, a polyurethane material, etc.

[0042] Optionally, the annulus simulation structure is vertically inclined, and the inclination ratio of the annulus simulation structure is the same as the inclination ratio of the sea pipe used to connect the seabed pipeline and the oil production platform. For example, the inclination ratio of the annulus simulation structure is 1:10, which can simulate the inclination ratio of the riser. The inclination ratio refers to the ratio of the horizontal lateral displacement distance to the vertical distance, that is, the tangent value of the inclination angle. The inclination ratio of the seabed pipeline riser protective pipe from the seabed pipeline to the oil production platform is 1:10, and the annulus simulation structure adopts the same setting as the actual seabed pipeline riser protective pipe. The length of the riser 2 is 7000mm; the outer diameter of the riser 2 is 219mm. The length of the protective pipe 3 is 6000mm, and the inner diameter of the protective pipe 3 is 318.8mm. In this embodiment, the riser is equivalent to the vertical part of the riser in the seabed sea pipeline. In the seabed, the vertical riser and the horizontal riser are integrated, which is an oil and gas transmission pipeline and is closed. In this embodiment, the protective pipe is equivalent to the protective pipe outside the submarine riser. The protective pipe only protects a section of the riser above and below the tolerance zone, and also protects it from impacts with ships and sea ice. The lower end of the protective pipe is open. The annular space between the riser and the protective pipe is not closed, and a filling material is needed to seal the annular space. The bottom support plays a temporary supporting and sealing role. When pouring this embodiment, the bottom support is released first, and then the filling material is injected. The filling material exhibits liquid fluidity, and after solidification, it becomes solid, which permanently seals the riser and protective pipe simulated in this embodiment. The same settings as the actual submarine protective pipe and riser.

[0043] Optionally, the liquid in the water tank 1 submerges the annular space simulation structure by 600 mm, which can simulate the sealing effect of the filling material under tidal conditions.

[0044] Optionally, the process window 6 is rectangular, the longitudinal length of the process window 6 is 400 mm, and the transverse length of the process window 6 is 240 mm. The process window 6 is used in conjunction with a cleaning tool and a detection tool to lower and recycle the blocking airbag and the bottom bracket. The present application does not impose any specific restrictions on the shape and size of the process window 6, for example, it can also be circular, elliptical, oblong, etc.

[0045] In summary, this embodiment can simulate the repair of riser annulus corrosion, the selection of filling materials and the verification of construction technology, and has a guiding role in the repair of riser annulus corrosion.

[0046] For ease of description, spatially relative terms such as "upper", "lower", "outer layer", "inner layer" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. Therefore, the exemplary term "lower" can include both upper and lower orientations.

[0047] Furthermore, relational terms such as "3" and "4" etc. are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0048] Although the preferred implementation cases of the utility model have been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the utility model, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the utility model and the claims, which all fall within the scope of protection of the utility model.

Claims

1. A device for simulating the repair of the annular space of a submarine pipeline by injection, characterized in that: include: A catheter rack simulation structure, wherein a water tank is provided on the inner bottom surface of the catheter rack simulation structure; an annulus simulation structure, the annulus simulation structure is arranged in the jacket simulation structure, the annulus simulation structure comprises a riser and a protective pipe, the protective pipe is sleeved outside the riser, an annulus is formed between the protective pipe and the riser, and the lower ends of the protective pipe and the riser extend into the water tank; A retracting and releasing device is arranged above the annulus simulation structure, and is used for retracting and releasing annulus tools into the annulus.

2. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: The jacket simulation structure comprises: A main structure, wherein the water tank is arranged on the inner bottom surface of the main structure; An operating platform is arranged above the main structure, and the retractable device is arranged above the operating platform.

3. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: A process window is provided on the upper portion of the outer peripheral wall of the protective tube.

4. The device for simulating injection repair of annular space of a submarine pipeline according to claim 2, characterized in that: The inner side wall of the main structure is provided with a protective pipe support frame, and the protective pipe support frame is connected to the outer peripheral wall of the protective pipe.

5. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: The retractable device comprises: Winch, two of the winches are arranged above the catheter frame simulation structure, and the stroke of the winch is controlled by a stepping motor and a counter; Traction ropes, two of which are respectively wound around corresponding winches, and the winches drive the corresponding traction ropes to be retracted and released; A hanging flange, both ends of which are respectively connected to the lower ends of the two traction ropes, and the hanging flange is used to carry an annular tool into the annular space.

6. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: The annular space tool comprises a cleaning tool, a detection tool, a plugging air bag and a bottom support.

7. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: The length of the vertical pipe is 7000 mm, and the length of the protective pipe is 6000 mm.

8. The device for simulating injection repair of annular space of a submarine pipeline according to claim 1, characterized in that: The liquid in the water tank submerges the annular space simulation structure by 600 mm.

9. The device for simulating injection repair of annular space of a submarine pipeline according to claim 2, characterized in that: The jacket simulation structure further includes: A support frame is obliquely supported on the outside of the main structure.

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