CN112139752A - Deep water sea pipe maintenance and replacement method - Google Patents
Deep water sea pipe maintenance and replacement method Download PDFInfo
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- CN112139752A CN112139752A CN202010956331.8A CN202010956331A CN112139752A CN 112139752 A CN112139752 A CN 112139752A CN 202010956331 A CN202010956331 A CN 202010956331A CN 112139752 A CN112139752 A CN 112139752A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D21/00—Machines or devices for shearing or cutting tubes
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Abstract
The invention relates to a method for maintaining and replacing a deepwater sea pipe, which comprises the following steps: s1, lowering a sea pipe cutting device controlled by the underwater robot to cut the damaged pipe section of the damaged sea pipe, and recovering the damaged pipe section through a lifting device to divide the damaged sea pipe into a first pipe section and a second pipe section; s2, lifting the first pipe section and the second pipe section through the lifting device, and removing coatings of the first pipe section and the second pipe section; s3, lowering the first pipe section and the second pipe section after treatment to the seabed through the lifting device; s4, connecting connectors at the ports of the first pipe section and the second pipe section respectively and carrying out pressure testing; and S5, lowering the prefabricated new pipe section through the lifting equipment to be in pairing connection with the first pipe section and the second pipe section. The deepwater sea pipe maintenance and replacement method can complete the maintenance and the production recovery of the sea pipe as soon as possible, can reduce the economic loss, and has the advantages of high automation degree, high maintenance efficiency and wide application range.
Description
Technical Field
The invention relates to a sea pipe maintenance technology, in particular to a method for maintaining and replacing a deep water sea pipe.
Background
In recent years, the number of deepwater marine pipes is increasing, and accidents of marine pipe damage are more and more frequent due to the long years of marine pipe design and construction, pipeline corrosion, towing of trawlers and the like. Once the sea pipe is damaged, the sea pipe brings huge threats to the production of marine environment and oil and gas fields. At present, no deep water sea pipe maintenance technology of more than 2000 meters exists in China, and the field still belongs to the blank. Once an accident occurs in the deepwater sea pipe, foreign technologies and equipment need to be mobilized for maintenance, so that not only is the economic cost high, but also the safety of national energy supply is threatened.
At present, mature 300 m shallow water area sea pipe replacing and maintaining technology exists in China, but the sea pipe replacing and maintaining technology in the deep water area of more than 300 m is blank, and the mature deep water sea pipe replacing and maintaining technology is not found, in particular to a sea pipe maintaining method capable of realizing deep water flange connection. The pipeline water depth of 3-1 gas field of the lychee bay put into production in China at present reaches 1500 meters, and the water depth of 17-2 project of the developed cemetery reaches 1700 meters. Once the pipeline of the deepwater oil and gas field leaks, serious marine environmental pollution and huge economic loss can be caused, and the research on deepwater marine pipe emergency maintenance technology is not slow.
Disclosure of Invention
The invention aims to provide an improved deep water sea pipe maintenance and replacement method.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for repairing and replacing a deepwater sea pipe is constructed, and comprises the following steps:
s1, lowering a sea pipe cutting device controlled by the underwater robot to cut the damaged pipe section of the damaged sea pipe, and recovering the damaged pipe section through a lifting device to divide the damaged sea pipe into a first pipe section and a second pipe section;
s2, lifting the first pipe section and the second pipe section through the lifting device, and removing coatings of the first pipe section and the second pipe section;
s3, lowering the first pipe section and the second pipe section after treatment to the seabed through the lifting device;
s4, connecting connectors at the ports of the first pipe section and the second pipe section respectively and carrying out pressure testing;
and S5, lowering the prefabricated new pipe section through the lifting equipment to be in pairing connection with the first pipe section and the second pipe section.
Preferably, in the step S1, the marine vessel cutting device is a diamond wire cutting saw connected with the water tank robot and operated by the underwater robot.
Preferably, in the step S2, the method includes the following steps:
s2.1, lowering an anti-settling plate to the first pipe section and the second pipe section;
s2.2, the lifting equipment is placed on the anti-sinking plate and connected with the anti-sinking plate, the first pipe section and the second pipe section;
s2.3, lifting the first pipe section and the second pipe section to a set height through the lifting equipment;
s2.4, cleaning the surface coatings of the first pipe section and the second pipe section through coating cleaning equipment.
Preferably, a sea pipe lowering operation platform is further included between step S3 and step S4, the first pipe section and the second pipe section are lifted by the sea pipe maintaining operation platform and the lifting device, and the sea pipe cutting device is lowered to a set position on the sea pipe maintaining operation platform, so that the first pipe section and the second pipe section are cut again.
Preferably, the step S4 further includes the following steps:
s4.1, beveling the ports of the first pipe section and the second pipe section;
s4.2, respectively connecting the connectors to the beveled ports of the first pipe section and the second pipe section;
s4.3, carrying out pressure test on the first pipe section and the second pipe section.
Preferably, the step S5 includes the steps of:
s5.1, welding flanges at two ends of the new pipe section, and lowering the new pipe section welded with the flanges;
s5.2, aligning two ends of the new pipe section with ports of the first pipe section and the second pipe section respectively, and butting flanges at two ends of the new pipe section with connectors of the first pipe section and the second pipe section respectively;
and S5.3, installing bolts on the flange and the connector and tensioning.
Preferably, step S5 is followed by
S6, carrying out pressure test on the whole sea pipe connected with the new pipe section until the pressure test is qualified, and lowering the whole sea pipe to the seabed.
Preferably, the new pipe section is a U-shaped pipe prefabricated from the damaged pipe section that is cut away.
Preferably, said step S1 is preceded by a step of pre-investigating said damaged pipe section of said damaged sea pipe.
Preferably, before the step S1, the method further comprises performing a work site mud suction in the construction area to create a repair work space at the bottom of the damaged sea pipe.
The implementation of the method for maintaining and replacing the deepwater sea pipe has the following beneficial effects: the deepwater sea pipe maintenance and replacement method can complete the maintenance and the production recovery of the sea pipe as soon as possible, can reduce the economic loss, and has the advantages of high automation degree, high maintenance efficiency and wide application range.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a method for repairing and replacing a deep water sea pipe according to some embodiments of the present invention;
FIG. 2 is a schematic illustration of the deepwater sea pipe of FIG. 1 being damaged;
FIG. 3 is a schematic view of the deep water sea pipe of FIG. 1 in a cut state;
FIG. 4 is a schematic view of a damaged section of the deepwater marine pipeline shown in FIG. 1 in a retrieval state;
fig. 5 is a schematic view illustrating a state that the deepwater sea pipe anti-sinking plate shown in fig. 1 is lowered;
FIG. 6 is a schematic diagram of the deepwater sea pipe of FIG. 1 in a lifted state;
FIG. 7 is a schematic view of the deep water sea pipe of FIG. 1 showing the coating being cleaned;
FIG. 8 is a schematic view of the connection of FIG. 1 shown installed at the ports of a first pipe segment and a second pipe segment;
FIG. 9 is a schematic view of the new pipe section of FIG. 1 being lowered;
fig. 10 is a schematic view of a state where the maintenance of the marine vessel shown in fig. 1 is completed.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The method for maintaining and replacing the deepwater sea pipe is mainly used for replacing and maintaining the sea pipe when the deepwater sea pipe is damaged, and can ensure that the deepwater sea pipe can be maintained and produced again as soon as possible after an accident happens, so that the economic loss is reduced. The method for maintaining and replacing the deepwater sea pipe can effectively solve the technical problem that the deepwater sea pipe cannot be repaired in a short time after being damaged, and can realize quick repair of the damaged deepwater sea pipe of more than 2000 meters. Compared with the existing maintenance of the sea pipe in the shallow water area within 300 meters, the application range of the sea pipe is greatly increased. The deepwater marine pipe maintenance and replacement method is also applicable to the replacement and maintenance of marine pipes in shallow water areas, the whole process is realized by the operation of an underwater robot 20(ROV), the automation degree is high, the maintenance efficiency is high, and the method plays an important role in promoting the development of the deepwater marine pipe maintenance technology in China.
As shown in fig. 1, the deep water sea pipe repair and replacement method may include the following steps:
s1, lowering the sea pipe cutting device 30 operated by the underwater robot 20 to cut the damaged pipe section 13 of the damaged sea pipe 10, and recovering the damaged pipe section 13 through the lifting device 50 to divide the sea pipe into the first pipe section 11 and the second pipe section 12. The marine vessel cutting device 30 may be a diamond wire saw, and the diamond wire saw may be connected to the underwater robot 20, specifically, the diamond wire saw may be connected to a hydraulic pipeline of the underwater robot 20, and may further cut the damaged tubular section 13 of the damaged marine vessel 10 by driving the hydraulic pipeline of the underwater robot 20. The lifting apparatus 50 may include a crane and/or a pipe lifting frame coupled to a crane.
As shown in fig. 2 to 4, specifically, the underwater robot 20 may be lowered to the seabed by a crane, and then the marine pipe cutting device 30 is lowered to the seabed by the crane and connected to the hydraulic pipeline of the underwater robot 20, and the underwater robot 20 controls the hydraulic pipeline to feed so as to provide hydraulic power to the marine pipe cutting device 30, so as to drive the diamond wire of the marine pipe cutting device 30 to cut the damaged pipe section 13 of the damaged marine pipe 10. The damaged marine pipe 10 is divided into a first pipe section 11 and a second pipe section 12 by connecting the pipe carrier to a damaged pipe section 13, connecting the pipe carrier to a crane through a rigging, lifting the damaged pipe section 13 by the crane and recovering the damaged pipe section 13 to a deck of a ship.
Before step S1 is performed, a pre-investigation of the damaged pipe section 13 of the damaged marine pipe 10 is also required, and specifically, the underwater robot 20 may be lowered to the damaged marine pipe 10 on the seabed by the lifting device 50, and the damaged condition of the damaged marine pipe 10 may be investigated and the damaged pipe section 13 may be confirmed by the underwater robot 20, so that a safety inspection and debugging before construction may be realized.
Before the step S1, a working site may be used to suck mud in the construction area, so that a maintenance working space may be created at the bottom of the damaged sea pipe 10. Specifically, a suction dredge pipe connected to a suction dredge pump may be lowered to the bottom of the damaged sea pipe 10 on the seabed, and the suction dredge pump may be activated to suck out mud from the bottom of the damaged sea pipe 10.
S2, lowering the lifting apparatus 50 to lift the first pipe segment 11 and the second pipe segment 12 and remove the first pipe segment 11 and the second pipe segment 12 from the coating.
As shown in fig. 5-7, in some embodiments, the S2 step includes the following steps:
s2.1, lowering the anti-sinking plate 40 to the first pipe section 11 and the second pipe section 12. Specifically, two sets of anti-settling plates 40 are placed at the first pipe section 11 and the second pipe section 12 on the seabed by the lifting apparatus 50, respectively. Each set of anti-settling plates 40 may comprise two rows of anti-settling plates 40 arranged side by side and on opposite sides of the first pipe segment 11 and/or the second pipe segment 12.
S2.2, the lifting device 50 is brought onto the anti-sink plate 40 and connected with the anti-sink plate 40 and the first and second pipe sections 11, 12. Specifically, the pipe racks of the two sets of lifting devices 50 are respectively placed on the two sets of anti-sinking plates 40, the pipe racks of the lifting devices 50 are connected with the anti-sinking plates 40 through the underwater robot 20, the first pipe sections 11 are clamped into the clamping structures of the corresponding pipe racks through the underwater robot 20, and the second pipe sections 12 are clamped into the clamping structures of the corresponding pipe racks through the underwater robot 20.
S2.3, lifting the first pipe section 11 and the second pipe section 12 to a set height through the lifting device 50. Specifically, the crane lifts the pipe lifting frame to lift the first pipe segment 11 and the second pipe segment 12, and then lifts to a set height.
S2.4, cleaning the surface coatings of the first pipe section 11 and the second pipe section 12 through the coating cleaning device 60. Specifically, two sets of coating cleaning devices 60 are correspondingly lowered to the first pipe section 11 and the second pipe section 12 by the lifting device 50, and the surface coatings of the first pipe section 11 and the second pipe section 12 are cleaned respectively.
S3, lowering the treated first and second pipe sections 11, 12 to the seabed by the lifting apparatus 50. In particular, the riser rack is lowered by the crane and the treated first and second pipe sections 11, 12 are lowered onto the seabed.
As shown in fig. 8, between the steps S3 and S4, the method further comprises lowering the marine pipe repair work platform 70, lifting the first pipe section 11 and the second pipe section 12 by the marine pipe repair work platform 70 and the lifting device 50, and lowering the marine pipe cutting device 30 to a set position on the marine pipe repair work platform 70, so as to cut the first pipe section 11 and the second pipe section 12 again. Specifically, in some embodiments, the subsea pipeline repair work platform 70 may be connected to a crane, and the subsea pipeline repair work platform 70 may be lowered to the subsea pipeline by the crane and connected to the damaged subsea pipeline 10. And then the sea pipe maintenance operation platform 70 and the pipe lifting frame are lifted by a crane, so that the sea pipe maintenance operation platform 70 and the lifting equipment 50 lift the first pipe section 11 and the second pipe section 12 together, then the sea pipe cutting device 30 is placed on the sea pipe maintenance operation platform 70 by the lifting equipment 50, the sea pipe cutting device 30 is connected with a hydraulic pipeline of the underwater robot 20, the underwater robot 20 is controlled to feed, and then hydraulic power is provided for the sea pipe cutting device 30, so that the diamond line is driven to accurately cut the first pipe section 11 and the second pipe section 12 again, and then the cut pipe sections are recovered to a ship deck by the lifting equipment 50. The two sets of the marine vessel maintenance work platform 70, the lifting device 50 and the marine vessel cutting device 30 are respectively two sets, and the two sets of the marine vessel maintenance work platform 70, the lifting device 50 and the marine vessel cutting device 30 can be arranged corresponding to the first pipe section 11 and the second pipe section 12.
And S4, connecting the connectors 80 at the ports of the first pipe section 11 and the second pipe section 12 respectively, and performing pressure test.
As shown in fig. 9, in some embodiments, this step S4 may include the following steps:
s4.1, beveling the ports of the first pipe section 11 and the second pipe section 12. Specifically, the beveling machine is lowered to the maintenance platform 70, and the beveling machine is started to bevel the ports of the first pipe section 11 and the second pipe section 12.
And S4.2, respectively connecting the connector 80 to the beveled ports of the first pipe section 11 and the second pipe section 12. Specifically, the two connectors 80 are lowered to the maintenance platform 70, and the two connectors 80 are correspondingly connected to the beveled port of the first pipe section 11 and the beveled port of the second pipe section 12 through the underwater robot 20. The connector 80 may be a deepwater mechanical connector 80, and a deepwater flange may be attached to the end of the mechanical connector 80.
And S4.3, carrying out pressure testing on the first pipe section 11 and the second pipe section 12.
S5, lowering the prefabricated new pipe section 14 by the lifting device 50 to be connected in pairs with the first pipe section 11 and the second pipe section 12.
As shown in fig. 10, in some embodiments, the S5 step includes the steps of:
s5.1, welding flanges 90 at two ends of the new pipe section 14; wherein the new pipe section 14 may be a U-shaped pipe, and the new pipe section 14 may be preformed according to the cut damaged pipe section 13. Specifically, two flanges 90 may be respectively sleeved at two ends of the new pipe section 14 and fixedly connected to the new pipe section 14 by welding, and then the new pipe section 14 welded with the flanges 90 is lowered onto the maintenance platform 70 by the lifting device 50 and located between the first pipe section 11 and the second pipe section 12.
And S5.2, aligning the two ends of the new pipe section 14 with the ports of the first pipe section 11 and the second pipe section 12 respectively, and butting the flanges 90 at the two ends of the new pipe section 14 with the connectors 80 of the first pipe section 11 and the second pipe section 12 respectively. Specifically, the position of the new pipe section 14 is adjusted by the underwater robot 20 so that the two ends of the new pipe section 14 are aligned with the ports of the first pipe section 11 and the second pipe section 12, respectively, and then the flanges 90 at the two ends of the new pipe section 14 are paired with the connectors 80 of the first pipe section 11 and the second pipe section 12.
And S5.3, installing bolts on the flange 90 and the connector 80 and tensioning.
Further comprising after the step of S5:
and S6, carrying out pressure test on the whole sea pipe connected with the new pipe section 14 until the pressure test is qualified, and putting the whole sea pipe to the seabed.
After the maintenance of the marine pipeline is completed, the pipe lifting frame, the maintenance operation platform 70 and the underwater robot 20 are recovered to the deck by the crane.
The deep water sea pipe maintenance and replacement method can be used for deep water sea pipe maintenance and replacement, realizes huge spanning from diver operation to deep water ROV operation in the domestic sea pipe maintenance technology, and has the advantages of high automation degree, high maintenance efficiency and wide application range.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A method for maintaining and replacing a deepwater sea pipe is characterized by comprising the following steps:
s1, lowering a sea pipe cutting device controlled by the underwater robot to cut the damaged pipe section of the damaged sea pipe, and recovering the damaged pipe section through a lifting device to divide the damaged sea pipe into a first pipe section and a second pipe section;
s2, lifting the first pipe section and the second pipe section through the lifting device, and removing coatings of the first pipe section and the second pipe section;
s3, lowering the first pipe section and the second pipe section after treatment to the seabed through the lifting device;
s4, connecting connectors at the ports of the first pipe section and the second pipe section respectively and carrying out pressure testing;
and S5, lowering the prefabricated new pipe section through the lifting equipment to be in pairing connection with the first pipe section and the second pipe section.
2. The deep water sea pipe repair and replacement method according to claim 1, wherein in the step S1, the sea pipe cutting device is a diamond wire cutting saw connected to a water tank robot and operated by an underwater robot.
3. The deep water sea pipe repair and replacement method according to claim 1, wherein the step S2 includes the steps of:
s2.1, lowering an anti-settling plate to the first pipe section and the second pipe section;
s2.2, the lifting equipment is placed on the anti-sinking plate and connected with the anti-sinking plate, the first pipe section and the second pipe section;
s2.3, lifting the first pipe section and the second pipe section to a set height through the lifting equipment;
s2.4, cleaning the surface coatings of the first pipe section and the second pipe section through coating cleaning equipment.
4. The method for deepwater sea pipe repair and replacement according to claim 1, further comprising a lowering sea pipe repair work platform between the steps S3 and S4, wherein the first pipe section and the second pipe section are cut again by lifting the first pipe section and the second pipe section by the sea pipe repair work platform and the lifting device and lowering the sea pipe cutting device to a set position on the sea pipe repair work platform.
5. The deep water sea pipe repair and replacement method according to claim 1, wherein the step S4 further comprises the steps of:
s4.1, beveling the ports of the first pipe section and the second pipe section;
s4.2, respectively connecting the connectors to the beveled ports of the first pipe section and the second pipe section;
s4.3, carrying out pressure test on the first pipe section and the second pipe section.
6. The deep water sea pipe repair and replacement method according to claim 1, wherein the step S5 comprises the steps of:
s5.1, welding flanges at two ends of the new pipe section, and lowering the new pipe section welded with the flanges;
s5.2, aligning two ends of the new pipe section with ports of the first pipe section and the second pipe section respectively, and butting flanges at two ends of the new pipe section with connectors of the first pipe section and the second pipe section respectively;
and S5.3, installing bolts on the flange and the connector and tensioning.
7. The method for repairing and replacing a deep water sea pipe according to claim 1, wherein step S5 is followed by
S6, carrying out pressure test on the whole sea pipe connected with the new pipe section until the pressure test is qualified, and lowering the whole sea pipe to the seabed.
8. The deep water sea pipe repair and replacement method of claim 1, wherein the new pipe section is a U-shaped pipe prefabricated from the damaged pipe section that is cut away.
9. The deep water sea pipe repair and replacement method of claim 1, further comprising pre-investigating the damaged pipe section of the damaged sea pipe before the step S1.
10. The method for repairing and replacing a deepwater sea pipe according to claim 1, wherein the step S1 is preceded by performing a spot suction on a construction area to create a repair work space at the bottom of the damaged sea pipe.
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| CN202010956331.8A CN112139752A (en) | 2020-09-11 | 2020-09-11 | Deep water sea pipe maintenance and replacement method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010956331.8A CN112139752A (en) | 2020-09-11 | 2020-09-11 | Deep water sea pipe maintenance and replacement method |
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| CN112139752A true CN112139752A (en) | 2020-12-29 |
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| CN202010956331.8A Pending CN112139752A (en) | 2020-09-11 | 2020-09-11 | Deep water sea pipe maintenance and replacement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606382A (en) * | 2021-08-20 | 2021-11-05 | 中国海洋石油集团有限公司 | Pipe pillow for deepwater submarine pipeline |
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Application publication date: 20201229 |