CN115518859A - Submarine pipeline inner wall corrosion repair construction method - Google Patents
Submarine pipeline inner wall corrosion repair construction method Download PDFInfo
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- CN115518859A CN115518859A CN202211316660.1A CN202211316660A CN115518859A CN 115518859 A CN115518859 A CN 115518859A CN 202211316660 A CN202211316660 A CN 202211316660A CN 115518859 A CN115518859 A CN 115518859A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 32
- 230000007797 corrosion Effects 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000008439 repair process Effects 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 238000000576 coating method Methods 0.000 claims abstract description 58
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000005488 sandblasting Methods 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 230000004048 modification Effects 0.000 claims abstract description 5
- 238000012986 modification Methods 0.000 claims abstract description 5
- 230000001131 transforming effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000007765 extrusion coating Methods 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- 239000013043 chemical agent Substances 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000005067 remediation Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003082 abrasive agent Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
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- 238000003908 quality control method Methods 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a submarine pipeline inner wall corrosion repair construction method, which sequentially comprises the following steps: removing dirt attached to the inner wall of the pipeline; temporarily transforming the pipeline structure to keep the smooth diameter of the inner wall of the pipeline unchanged; cleaning the pipeline; sequentially carrying out mechanical rust removal, sand blasting rust removal and rust removal condition detection on the inner wall of the pipeline; after the rust removal condition of the inner wall of the pipeline meets the set requirement, coating the inner wall of the pipeline to form an anti-corrosion coating on the inner wall of the sea pipe, and detecting the coating; and when the coating condition of the inner wall of the pipeline meets the set requirement, the pipeline structure is restored to the state before temporary modification. The invention adopts the inner wall corrosion repair technology for the submarine pipeline with higher safe operation risk, not only can prevent the continuation of the internal corrosion, but also can reinforce the pipeline to a certain extent, prolong the service life of the submarine pipeline and greatly reduce the conventional operation and maintenance cost.
Description
Technical Field
The invention relates to a pipeline inner wall corrosion repairing method, in particular to a submarine pipeline inner wall corrosion repairing construction method.
Background
At present, once the submarine pipeline is laid and put into production, the submarine pipeline is in a low-temperature high-pressure submarine environment for a long time and is subjected to continuous erosion of seawater. The laying costs of subsea pipelines are extremely expensive compared to land pipelines. If corrosion occurs and repair is not carried out in time, not only is conveying unsmooth caused, but also safety accidents are easy to occur, if the corroded submarine pipeline is replaced, the replacement cost is huge, and the loss caused by oil field production stop is also huge
At present, because of the existence of special structures such as a riser, an elbow, an expansion bend, a ball receiving and sending cylinder, a monitoring instrument and the like, corrosion is slowed down only by filling a corrosion inhibitor, when leakage of the submarine pipeline is found, a specially-made pipe clamp is usually used for externally plugging a leakage point, or the submarine pipeline with high operation safety risk is integrally replaced. How to reduce the maintenance cost of submarine pipeline to before leaking, carry out comprehensive restoration to the submarine pipeline that leaks the higher risk, form continuous and complete anticorrosive structure at submarine pipeline inner wall, guarantee submarine pipeline safe operation is the present technological problem that awaits solution.
Disclosure of Invention
The invention provides a submarine pipeline inner wall corrosion repair construction method for solving the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a corrosion repair construction method for the inner wall of a submarine pipeline sequentially comprises the following steps: removing dirt attached to the inner wall of the pipeline; temporarily transforming the pipeline structure to keep the smooth diameter of the inner wall of the pipeline unchanged; cleaning the pipeline; sequentially carrying out mechanical rust removal, sand blasting rust removal and rust removal condition detection on the inner wall of the pipeline; after the rust removal condition of the inner wall of the pipeline meets the set requirement, coating the inner wall of the pipeline to form an anti-corrosion coating on the inner wall of the sea pipe, and detecting the coating; and when the coating condition of the inner wall of the pipeline meets the set requirement, the pipeline structure is restored to the state before temporary modification.
Further, the method for removing the dirt attached to the inner wall of the pipeline comprises the following method steps: firstly, detecting the deformation condition inside a pipeline by adopting a diameter measuring pipe cleaner; and then one or a plurality of combinations of a foam pipe cleaner, a foam diameter measuring pipe cleaner, a steel brush pipe cleaner and a magnet pipe cleaner are used as a device for removing the dirt attached to the inner wall of the pipeline, and the fluid in the submarine pipeline is used as a driving source to drive the device for removing the dirt attached to the inner wall of the pipeline.
Further, the method for temporarily modifying the pipeline structure to keep the smooth diameter of the inner wall of the pipeline unchanged comprises the following method steps: and temporarily dismantling the reducing, tee joint and branch pipe structures.
Further, the method for cleaning the pipeline comprises the following method steps: melting and/or decomposing oil inside the submarine pipeline by using hot water and/or chemical agents; when the hot water is used for melting oil, the temperature of the hot water at the tail end of the pipeline is more than or equal to 60 ℃ and is kept for more than 30 minutes, and the hot water pressure of the pipeline is kept in a set range.
Further, after the pipeline is cleaned, a water absorber is used for removing water, and a drying agent is used for strengthening water removal; the water absorber has a density of 0.0793-0.0868g/cm 3 The sponge is used as a water absorption material, and the sponge is in a foam millimeter level and is communicated with each other.
And further, before carrying out sand blasting and rust removing on the inner wall of the pipeline, drying the pipeline by using a compressed air dryer.
Furthermore, when the inner wall of the pipeline is subjected to sand blasting and rust removal, a large nozzle is used for sand blasting to remove rust on the inner wall of the pipeline, then a sand blaster with a positioning function and capable of adjusting the nozzle direction and the abrasive speed is used, a small nozzle is used, the abrasive impact direction is changed, and fixed-point rust removal is performed on pits in the inner wall of the pipeline.
Furthermore, the abrasive material for sand blasting and rust removing has 8-20 meshes, mohs hardness of more than 7 and density of 2.5-2.7g/cm 3 Content of mud<1 percent; the injection pressure is controlled between 0.5MPa and 0.8MPa; and measuring the anchor line depth of the pipe orifice by using a surface roughness meter after the sand blasting is finished.
Further, the method for coating the inner wall of the pipeline comprises the following method steps: pushing the coating to form a uniform coating on the inner wall of the sea pipe by using the extrusion coating device, and adjusting the clearance fit between the extrusion coating device and the pipeline according to the performance of the coating so as to meet the requirement of the coating thickness; the thickness of the coating is controlled to be 800-1000 mu m, the extrusion coating frequency is 3-4 times, the coating interval is not more than 24 hours each time, and the surface rubber hardness of the extrusion coating device is Shore A60 +/-2 degrees.
Furthermore, the pipeline robot is adopted to carry out whole-process camera detection on the appearance of the coating on the inner wall of the pipeline, and the sampling detection in the whole-process range is carried out on the coating thickness and the leakage points.
The invention has the advantages and positive effects that: the technical scheme of the invention can partially replace the maintenance of the submarine pipeline and the replacement of the whole submarine pipeline. For the submarine pipeline with higher safe operation risk, the inner wall corrosion repair technology is adopted, so that not only can the continuation of internal corrosion be prevented, but also the pipeline can be reinforced to a certain extent, the service life of the submarine pipeline is prolonged, the conventional operation and maintenance cost is greatly reduced, and the long-period safe operation of an oil field is effectively ensured, such as the internal detection technology, the corrosion inhibitor, the scale inhibitor filling and the like. The pipeline repairing process is used for replacing the pipeline replacing and replacing process, the production stop period of the oil field is obviously shortened, and the maintenance cost of the submarine pipeline is obviously reduced.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Detailed Description
For a further understanding of the contents, features and effects of the invention, reference will now be made to the following examples, which are to be read in connection with the accompanying drawings, wherein:
referring to fig. 1, a submarine pipeline inner wall corrosion repair construction method sequentially includes the following steps: removing dirt attached to the inner wall of the pipeline; temporarily transforming the pipeline structure to keep the smooth diameter of the inner wall of the pipeline unchanged; cleaning the pipeline; sequentially carrying out mechanical rust removal, sand blasting rust removal and rust removal condition detection on the inner wall of the pipeline; when the rust removal condition of the inner wall of the pipeline meets the set requirement, coating the inner wall of the pipeline to form an anti-corrosion coating on the inner wall of the sea pipe, and detecting the coating; and when the coating condition of the inner wall of the pipeline meets the set requirement, the pipeline structure is restored to the state before temporary modification.
After the submarine pipeline is drained, control keys such as reducing, tee joints and instrument pipelines exist, and adaptability transformation is needed.
Preferably, the method for removing the dirt attached to the inner wall of the pipeline comprises the following method steps: the deformation condition inside the pipeline can be detected by adopting a diameter measuring pipe cleaner; one or a plurality of combinations of a foam pipe cleaner, a foam diameter measuring pipe cleaner, a steel brush pipe cleaner and a magnet pipe cleaner can be used as a device for removing the dirt attached to the inner wall of the pipeline, and the fluid in the submarine pipeline is used as a driving source to drive the device for removing the dirt attached to the inner wall of the pipeline.
Preferably, the method for temporarily modifying the pipeline structure to keep the smooth diameter of the inner wall of the pipeline constant can comprise the following method steps: and temporarily detaching the reducing structure, the tee joint structure and the branch pipe structure. Straight pipes and/or bent pipes with the same diameter as the inner diameter of the pipeline can be adopted to replace reducing structures, tee structures and branch pipe structures.
Preferably, the method for cleaning a pipe may comprise the following method steps: the oil inside the submarine pipeline can be melted and/or decomposed by hot water and/or chemical agents; when the hot water is used for melting oil, the temperature of the hot water at the tail end of the pipeline is more than or equal to 60 ℃ and is kept for more than 30 minutes, and the hot water pressure of the pipeline is kept in a set range.
Preferably, after the pipeline is cleaned, a water absorber is used for removing water, and a drying agent is used for strengthening water removal; the water absorber can adopt a density of 0.0793-0.0868g/cm 3 Sea ofThe sponge is used as a water absorbing material, and the sponge is in a foam-pore millimeter level and is communicated with each other.
Preferably, before the inner wall of the pipeline is subjected to sand blasting and rust removal, a compressed air dryer can be adopted to perform drying treatment on the pipeline.
Preferably, the inner wall of the pipeline can be subjected to sand blasting and rust removal by adopting an air pressure sand blasting machine, when the inner wall of the pipeline is subjected to sand blasting and rust removal, a large nozzle can be used for sand blasting and rust removal of the inner wall of the pipeline, then a sand blaster with a positioning function and capable of adjusting the direction of the nozzle and the speed of an abrasive can be used, a small nozzle can be used for changing the impact direction of the abrasive, and pits on the inner wall of the pipeline can be subjected to fixed-point rust removal.
Preferably, the abrasive material for sand blasting and rust removing has a mesh number of 8-20 meshes, a Mohs hardness of more than 7 and a density of 2.5-2.7g/cm 3 The mud content can be<1 percent; the injection pressure can be controlled between 0.5MPa and 0.8MPa; and after the sand blasting is finished, the depth of the anchor lines at the pipe orifice can be measured by using a surface roughness meter.
Preferably, the method of coating the inner wall of the pipe may comprise the method steps of: the extrusion coater is utilized to push the coating to form a uniform coating on the inner wall of the sea pipe, and the clearance fit between the extrusion coater and the pipeline can be adjusted according to the performance of the coating, so that the coating thickness requirement is met; the thickness of the coating can be controlled to be 800-1000 μm, the extrusion coating frequency can be 3-4 times, the coating interval can not exceed 24 hours each time, and the surface rubber hardness of the extrusion coating device can be Shore A60 +/-2 degrees.
Preferably, the pipeline robot can be used for shooting and detecting the whole course of the appearance of the coating on the inner wall of the pipeline, and the sampling detection in the whole course range can be carried out on the coating thickness and the leakage points.
The pipeline robot, the squeezing coating device, the water suction machine, the compressed air dryer, the surface roughness meter, the diameter measuring pipe cleaner, the foam diameter measuring pipe cleaner, the steel wire brush pipe cleaner, the magnet pipe cleaner, the air pressure sand blasting machine and the like can adopt applicable components, equipment, devices and functional systems in the prior art or adopt the components, the equipment, the devices and the functional systems in the prior art and adopt conventional technical means to construct.
The working process and working principle of the present invention are further explained by a preferred embodiment of the present invention as follows:
step 1, descaling a pipeline:
the method comprises the following steps of utilizing fluid in the original submarine pipeline as power to push a foam pipe cleaner, a foam diameter measuring pipe cleaner, a wire brush pipe cleaner, a magnet pipe cleaner and the like to clean dirt, corrosion products and residues in the pipeline; firstly, a diameter measuring pig is sent, and the density is easy to be 200-220 kg/m 3 The diameter is easily 88-92% of the inner diameter of the pipeline, and the deformation in the pipeline is inspected. After the process is successfully finished, the pipe is cleaned by adopting a foam pipe cleaner, and the density is easy to be 75-100kg/m 3 The interference is controlled to be 2-3% of pipe diameter, and the total length is 1.5 times of pipe diameter.
Step 2, temporarily transforming the pipeline:
the temporary reconstruction of the pipeline is to ensure the continuity of repairing the pipeline, and the continuity means that reducing, tee joints and branch pipes cannot exist on the repaired marine pipe. According to the design of an offshore oil production platform, a receiving and launching ball barrel is arranged at two ends of a submarine pipeline, and the launching end is as follows: the launching tube, the instrument branch tube, the tee joint, the emergency shut-off valve enter the submarine pipeline, the ball receiving end and the ball launching end are consistent, and the ball receiving end and the ball launching end can be exchanged. The emergency shut-off valves are usually positioned on a lower deck, and the submarine pipeline between the emergency shut-off valves on two sides can meet the requirements of continuity, no reducing and tee joints, so that the emergency shut-off valves are dismantled at the positions to reconstruct the construction pipeline.
Step 3, cleaning a pipeline:
the pipeline cleaning is to fully melt the oil inside the submarine pipeline by using hot water or chemical agents and clean the submarine pipeline. And (3) cleaning with hot water, ensuring that the temperature of the tail end of the pipeline reaches 60 ℃, maintaining the temperature of the tail end for more than 30min, keeping the pressure of the pipeline at a certain pressure, preparing a recovery device and ensuring the smoothness of a water return pipe.
Step 4, pipeline dewatering:
the method utilizes special dewatering equipment to perform repeated reciprocating uninterrupted operation, and adopts a drying agent to perform enhanced dewatering. The adopted density is as follows: 0.0793-0.0868g/cm 3 The sponge as water absorption material makes dewatering equipment, and the sponge adopts the millimeter level of bubble and communicates each other.
Step 5, derusting the pipeline:
the pipeline rust removal is to use special rust removal equipment to perform repeated reciprocating uninterrupted operation so as to remove residual dirt and corrosion products on the inner wall of the pipeline. The density of the steel wire ball is easy to be: 0.5-1.0g/cm 3 。
Step 6, pipeline drying:
the pipeline drying is to use the processed compressed air, and the air is continuously supplied from one end of the pipeline under the condition that the water content and the temperature of the compressed air can meet the requirements. And (3) testing the tail end by adopting a white board, blowing the compressed air for 1 minute to the white board, wherein the white board has no water drops and visible oil stains. And when the relative humidity of the environment is more than 80%, the operation after the dehumidification of the steel pipe is carried out.
Step 7, sand blasting of pipelines:
the pipeline sand blasting is to remove rust on the inner wall of the pipeline by utilizing high-speed impact of abrasive, and then to adopt a sand blaster to improve the abrasive speed and change the angle of impacting the inner wall of the pipeline so as to carry out reinforced rust removal on pits. Selecting an abrasive material: the mesh size is preferably 8-20 mesh, mohs hardness is greater than 7, and density is 2.5-2.7g/cm 3 Content of mud<1 percent. Compressed air and quartz sand are annularly dispersed through a sand dispersing head with a built-in sand blasting device and are sprayed to the inner wall of the pipe at an angle of 50-70 degrees, and the pressure is controlled at 0.5-0.8 MPa. And after the sand blasting is finished, the pipe orifice is measured by using a surface roughness meter, and the depth of the anchor lines needs to reach 35-70 mu m.
Step 8, coating an anticorrosive layer in the pipeline:
the coating in the pipeline is realized by pushing the coating at high speed by using an extrusion coater to form a uniform coating on the inner wall of the marine pipe, and the matching between the extrusion coater and the pipeline is adjusted according to the performance of the coating to meet the requirement of the coating thickness, wherein the coating thickness is controlled to be 800-1000 mu m, the extrusion coating frequency is 3-4 times, and the coating interval is not more than 24 hours each time. The rubber hardness of the surface of the extrusion coating device is Shore A60 +/-2 degrees, and the interference fit between the surface of the extrusion coating device and the inner wall of the pipeline is not more than 15 percent of the thickness of the pipeline.
Step 9, internal coating detection:
the inner coating detection adopts a pipeline robot to detect the appearance of the coating in the whole process, and the coating thickness and the leakage point are sampled and detected in the whole process. And visually detecting that the surface of the inner coating is flat and smooth, has no bubbles, pinholes or scratches, and has the coating thickness requirement of not more than 1000 mu m, the adhesive force of not less than 10Mpa and the leak detection voltage of more than 6KV.
Step 10, construction recovery:
and the construction recovery refers to recovering the temporary pipeline, completing the node repair, re-accessing the repaired marine pipe into the system flow, and then entering a subsequent program according to the marine pipe baseline management. The implementation of the whole construction process and the field quality control need to be controlled by an independent third-party organization, and the marine oil industry generally adopts a classification society as a third-party service organization.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The submarine pipeline inner wall corrosion repair construction method is characterized by sequentially comprising the following steps: removing dirt attached to the inner wall of the pipeline; temporarily transforming the pipeline structure to keep the smooth diameter of the inner wall of the pipeline unchanged; cleaning the pipeline; sequentially carrying out mechanical rust removal, sand blasting rust removal and rust removal condition detection on the inner wall of the pipeline; after the rust removal condition of the inner wall of the pipeline meets the set requirement, coating the inner wall of the pipeline to form an anti-corrosion coating on the inner wall of the sea pipe, and detecting the coating; and when the coating condition of the inner wall of the pipeline meets the set requirement, the pipeline structure is restored to the state before temporary modification.
2. The subsea pipeline internal wall corrosion repair construction method according to claim 1, wherein the method for removing fouling adhered to the pipeline internal wall comprises the following method steps: firstly, detecting the deformation condition inside a pipeline by adopting a diameter measuring pipe cleaner; and then one or a plurality of combinations of a foam pipe cleaner, a foam diameter measuring pipe cleaner, a steel brush pipe cleaner and a magnet pipe cleaner are used as a device for removing the dirt attached to the inner wall of the pipeline, and the fluid in the submarine pipeline is used as a driving source to drive the device for removing the dirt attached to the inner wall of the pipeline.
3. The submarine pipeline inner wall corrosion repair construction method according to claim 1, wherein the method for temporarily modifying the pipeline structure to keep the smooth diameter of the pipeline inner wall unchanged comprises the following method steps: and temporarily detaching the reducing, tee joint and branch pipe structures.
4. The subsea pipeline inner wall corrosion repair construction method according to claim 1, wherein the method for cleaning the pipeline comprises the following method steps: melting and/or decomposing oil inside the submarine pipeline by using hot water and/or chemical agents; when the hot water is used for melting oil, the temperature of the hot water at the tail end of the pipeline is more than or equal to 60 ℃, the temperature is kept for more than 30 minutes, and the pressure of the hot water in the pipeline is kept in a set range.
5. The subsea pipeline inner wall corrosion restoration construction method according to claim 1, characterized in that after cleaning the pipeline, a water suction machine is used for removing water, and a drying agent is used for enhancing water removal; the water absorber has a density of 0.0793-0.0868g/cm 3 The sponge is used as a water absorption material, and the sponge is in a foam millimeter level and is communicated with each other.
6. The subsea pipeline inner wall corrosion repair construction method according to claim 1, wherein before the sand blasting and rust removal of the pipeline inner wall, a compressed air dryer is used for drying the pipeline.
7. The subsea pipeline inner wall corrosion repair construction method according to claim 1, wherein when performing sand blasting and rust removal on the pipeline inner wall, a large nozzle is used for sand blasting to remove rust on the pipeline inner wall, then a sand blaster with a positioning function and capable of adjusting the nozzle direction and the abrasive speed is used, a small nozzle is used for changing the abrasive impact direction, and fixed-point rust removal is performed on pits on the pipeline inner wall.
8. The submarine pipeline inner wall corrosion repair construction method according to claim 7, wherein the abrasive for sand blasting and rust removal has a mesh size of 8-20 meshes, a Mohs hardness of greater than 7, and a density of 2.5-2.7g/cm 3 Content of mud<1 percent; the injection pressure is controlled between 0.5MPa and 0.8MPa; and measuring the anchor line depth of the pipe orifice by using a surface roughness meter after the sand blasting is finished.
9. The subsea pipeline internal wall corrosion remediation construction method of claim 1, wherein the method of coating the pipeline internal wall comprises the method steps of: pushing the coating to form a uniform coating on the inner wall of the marine pipe by using the extrusion coating device, and adjusting the clearance fit between the extrusion coating device and the pipeline according to the performance of the coating to meet the requirement of the coating thickness; the thickness of the coating is controlled to be 800-1000 mu m, the extrusion coating frequency is 3-4 times, the coating interval is not more than 24 hours each time, and the surface rubber hardness of the extrusion coating device is Shore A60 +/-2 degrees.
10. The submarine pipeline inner wall corrosion repair construction method according to claim 1, wherein the pipeline robot is used for whole-process camera detection of the appearance of the pipeline inner wall coating, and whole-process sampling detection of the coating thickness and leak points is performed.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019853A1 (en) * | 1994-01-25 | 1995-07-27 | Queensland Heavy Duty Coating Pty. Ltd. | Applying coatings to tubing interiors |
| US20050287294A1 (en) * | 2004-06-18 | 2005-12-29 | Plastocor, Inc. | System and method for coating tubes |
| US20080163792A1 (en) * | 2003-06-06 | 2008-07-10 | Seitz Michael W | Preventing tube failure in boilers |
| CN101788094A (en) * | 2010-03-11 | 2010-07-28 | 陕西天元石化建设工程有限公司 | Inner wall anti-corrosive construction process of buried pipeline |
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2022
- 2022-10-26 CN CN202211316660.1A patent/CN115518859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019853A1 (en) * | 1994-01-25 | 1995-07-27 | Queensland Heavy Duty Coating Pty. Ltd. | Applying coatings to tubing interiors |
| US20080163792A1 (en) * | 2003-06-06 | 2008-07-10 | Seitz Michael W | Preventing tube failure in boilers |
| US20050287294A1 (en) * | 2004-06-18 | 2005-12-29 | Plastocor, Inc. | System and method for coating tubes |
| CN101788094A (en) * | 2010-03-11 | 2010-07-28 | 陕西天元石化建设工程有限公司 | Inner wall anti-corrosive construction process of buried pipeline |
Non-Patent Citations (3)
| Title |
|---|
| 《水暖工长上岗指南：不可不知的500个关键细节》编写组: "《输气管道工程》", 中国建材工业出版社, pages: 250 * |
| 严密林等: "带配重海管内壁和管端的特殊防腐技术", vol. 29, no. 9, pages 677 - 678 * |
| 殷兆龙: "《油田焊接钢质管道在线挤涂防腐的注意事项》", vol. 36, no. 4, pages 86 * |
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Application publication date: 20221227 |