CN113464724A - Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control - Google Patents
Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control Download PDFInfo
- Publication number
- CN113464724A CN113464724A CN202110621223.XA CN202110621223A CN113464724A CN 113464724 A CN113464724 A CN 113464724A CN 202110621223 A CN202110621223 A CN 202110621223A CN 113464724 A CN113464724 A CN 113464724A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- expansion bend
- temporary
- submarine pipeline
- underwater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 238000009417 prefabrication Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/16—Laying or reclaiming pipes on or under water on the bottom
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
Abstract
The invention relates to the technical field of ocean engineering, and discloses a submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control, which comprises the following steps of S1, prefabricating temporary pipe sections with corresponding lengths according to the axial size of an expansion bend along a pipeline; s2, connecting the submarine pipeline with the pipe-laying ship through flanges at two ends of the temporary pipe section, and laying and installing the submarine pipeline simultaneously; s3, after the submarine pipeline is installed on the seabed, removing the temporary pipeline section by a diver or an underwater robot through dismantling a flange; and S4, after the temporary pipe section is removed, positioning the prefabricated expansion bend at the reserved position of the removed temporary pipe section in a hoisting mode, and connecting the expansion bend with the submarine pipelines at two sides underwater through flanges. The submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control can effectively control in-place precision of the submarine pipeline and the expansion bend connection pipe end, and reduces difficulty of underwater connection of the expansion bend.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control.
Background
And the underwater expansion bend is in flange connection with the submarine pipeline through the position of an underwater measurement pipe abandoning point after the submarine pipeline is abandoned, and the pre-fabricated adjustment is carried out on the size of the originally designed expansion bend according to the pipe abandoning construction error of the end of the submarine pipeline. The submarine pipeline is influenced by environmental factors such as waves and ocean currents in laying operation, certain construction errors usually exist between the position of a abandoned pipe and the design position, and accordingly a certain deviation also exists between the connection position of the submarine pipeline and an expansion bend and the design position, so that a diver or an underwater robot is required to perform underwater measurement on the in-place positions of the submarine pipelines on two sides connected with the expansion bend in advance before the expansion bend of the submarine pipeline is installed underwater, and if the actual position deviates from the design position, on-site prefabrication adjustment needs to be performed on the basis of the design form of the expansion bend according to the measurement deviation, so that the accuracy requirement of underwater connection installation is met.
The prior art has the following defects and shortcomings:
when the underwater positioning accuracy of the submarine pipeline and the expansion bend is high, for some sea areas with severe wave and ocean current environmental conditions, the operation ship and the submarine pipeline are more sensitive to the influence of the environmental conditions, the submarine pipeline abandoning operation is usually difficult to meet the high pipe abandoning accuracy requirement, and the construction efficiency is greatly restricted; and the adjusted expansion bending state needs to be analyzed and calculated again, so that the offshore construction period can be directly limited, the workload of offshore construction and the service cycle of a working ship can be increased by underwater measurement and on-site prefabrication, the construction efficiency of offshore installation of the expansion bending is limited, and the offshore construction cost is increased. Meanwhile, if the installation deviation is large, the difficulty of carrying out underwater flange butt joint on the expansion bend can be increased, and underwater construction risks are increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control, which is characterized in that temporary pipe sections with corresponding lengths are prefabricated according to the axial size of an expansion bend along a pipeline, are connected with a submarine pipeline on a pipe laying ship through flanges at two ends of a steel pipe, and are laid and installed together with the submarine pipeline; after the submarine pipeline is installed on the seabed, a diver or an underwater robot is adopted to remove the section of the temporary pipeline section by dismantling the flange, the prefabricated expansion bend is hoisted to be positioned at the position of the original temporary pipeline section, and the expansion bend is connected with the submarine pipelines on two sides underwater through the flange. Compared with the traditional expansion bend installation method, the method can effectively control the relative positions of the abandoned pipeline point of the submarine pipeline and the end of the expansion bend, so that the axes of the submarine pipeline connected with the two sides after the temporary pipeline section is removed are basically in the same straight line, the controllable precision of the underwater position of the submarine pipeline before the expansion bend is installed is improved, and the prefabricated expansion bend and the originally designed expansion bend can be kept consistent in shape.
In order to achieve the purpose of the submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control, the invention provides the following technical scheme: a submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control comprises the following steps,
firstly, prefabricating a temporary pipe section with a corresponding length according to the axial size of the expansion bend along the pipeline;
connecting the pipe-laying ship with the submarine pipeline through flanges at two ends of the temporary pipe section, and laying and installing the pipe-laying ship and the submarine pipeline at the same time;
thirdly, after the submarine pipeline is installed on the seabed, removing the temporary pipeline section by a diver or an underwater robot through dismantling a flange;
and step four, after the temporary pipe section is removed, positioning the prefabricated expansion bend at the reserved position of the removed temporary pipe section in a hoisting mode, and connecting the expansion bend with the submarine pipelines at two sides underwater through flanges.
Preferably, the material, specification and coating structure of the temporary pipe section are the same as those of the submarine pipeline, and two flanges are respectively arranged at two ends of the temporary pipe section and are used for being connected with the submarine pipeline.
Preferably, the temporary pipe section and the submarine pipeline are laid and installed at the same time, and the temporary pipe section and the submarine pipeline are laid and then located at the position where the expansion bend is planned to be built.
Preferably, after the submarine pipeline is installed on the seabed, the temporary pipeline section is removed by dismantling the flange by using a diver or a underwater robot, and the removed temporary pipeline is recovered.
Preferably, after the temporary pipeline is dismantled, the relative positions of the pipe ends of the submarine pipelines on the two sides of the temporary pipe section need to be measured underwater again, the sizes of the expansion bends and the expansion bends are rechecked, and the prefabricated expansion bends are hoisted to be located at the positions of the original temporary pipe section after rechecking is correct.
Compared with the prior art, the invention provides the submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control, and the method has the following beneficial effects:
the submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control is used for submarine pipeline expansion bend connection for high-precision underwater in-place control, by arranging the temporary pipe section on the submarine pipeline and laying and installing the temporary pipe section and the submarine pipeline at the same time, after the temporary pipeline is dismantled, the length and relative angle between the subsea pipelines on both sides of the temporary pipe section can substantially maintain the state before the temporary pipe section is removed, therefore, the relative position of the pipe end of the submarine pipeline before the expansion bend is connected can be effectively controlled, the axes of the submarine pipeline connected with the two sides of the expansion bend are basically in the same straight line, the controllability of the underwater position of the submarine pipeline before the expansion bend is installed is improved, the prefabricated expansion bend and the originally designed expansion bend can be kept consistent in shape, the calculation and analysis of the expansion bend are avoided, the offshore construction period is shortened, and the offshore prefabrication workload of the expansion bend is reduced.
Drawings
FIG. 1 is a schematic view of a temporary pipeline section connected to a subsea pipeline according to a first step of the present invention;
FIG. 2 is a schematic view of a temporary pipe section of the second step of the present invention after removal;
FIG. 3 is a schematic view of a three-step expansion bend of the present invention prior to connection to a subsea pipeline;
FIG. 4 is a schematic view of a step four expansion bend of the present invention after it has been connected to a subsea pipeline.
In the figure: 1. a subsea pipeline; 2. a flange; 3. a temporary pipe section; 4. and (4) expanding and bending.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a method for connecting an expansion bend of a submarine pipeline suitable for high-precision underwater in-situ control includes the steps of,
firstly, prefabricating a temporary pipe section with a corresponding length according to the axial size of the expansion bend along the pipeline;
connecting the pipe-laying ship with the submarine pipeline through flanges at two ends of the temporary pipe section, and laying and installing the pipe-laying ship and the submarine pipeline at the same time;
thirdly, after the submarine pipeline is installed on the seabed, removing the temporary pipeline section by a diver or an underwater robot through dismantling a flange;
and step four, after the temporary pipe section is removed, positioning the prefabricated expansion bend at the reserved position of the removed temporary pipe section in a hoisting mode, and connecting the expansion bend with the submarine pipelines at two sides underwater through flanges.
In conclusion, a temporary pipe section with a corresponding length is prefabricated according to the axial size of the expansion bend along the pipeline, the material, the specification and the coating structure of the temporary pipe section are the same as those of the submarine pipeline, and two flanges are respectively arranged at two ends of the temporary pipe section and are used for being connected with the submarine pipeline; the pipe laying ship is connected with a submarine pipeline through flanges at two ends of a temporary pipe section, and the temporary pipe section and the submarine pipeline are laid and installed at the same time and are positioned at a position where an expansion bend is planned after being laid; after the submarine pipeline is installed on the seabed, a diver or an underwater robot is adopted to remove the temporary pipe section by dismantling the flange, and the removed temporary pipeline is recovered; after the temporary pipeline is dismantled, the relative positions of the submarine pipeline pipe ends on the two sides of the temporary pipeline section need to be measured underwater again, the relative positions and the sizes of the expansion bends need to be rechecked, the prefabricated expansion bends are hoisted to be located at the positions of the original temporary pipeline section after rechecking is correct, the expansion bends are connected with the submarine pipelines on the two sides underwater through flanges, and finally underwater installation of the expansion bends is completed.
The working use process and the installation method of the invention are that when the submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control is used, temporary pipe sections with corresponding lengths are prefabricated according to the axial size of the expansion bend along the pipeline, and are connected with the submarine pipeline through flanges at two ends of a steel pipe on a pipe-laying ship and are laid and installed together with the submarine pipeline; after the submarine pipeline is installed on the seabed, a diver or an underwater robot is adopted to remove the section of the temporary pipeline section by dismantling the flange, the prefabricated expansion bend is hoisted to be positioned at the position of the original temporary pipeline section, and the expansion bend is connected with the submarine pipelines on two sides underwater through the flange. Compared with the traditional expansion bend installation method, the method can effectively control the relative positions of the abandoned pipeline point of the submarine pipeline and the end of the expansion bend, so that the axes of the submarine pipeline connected with the two sides after the temporary pipeline section is removed are basically in the same straight line, the controllable precision of the underwater position of the submarine pipeline before the expansion bend is installed is improved, the prefabricated expansion bend and the originally designed expansion bend can be kept consistent in shape, the calculation and analysis are avoided, the offshore construction period is shortened, and the offshore prefabrication workload of the expansion bend is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control is characterized in that: comprises the following steps of (a) carrying out,
firstly, prefabricating a temporary pipe section with a corresponding length according to the axial size of the expansion bend along the pipeline;
connecting the pipe-laying ship with the submarine pipeline through flanges at two ends of the temporary pipe section, and laying and installing the pipe-laying ship and the submarine pipeline at the same time;
thirdly, after the submarine pipeline is installed on the seabed, removing the temporary pipeline section by a diver or an underwater robot through dismantling a flange;
and step four, after the temporary pipe section is removed, positioning the prefabricated expansion bend at the reserved position of the removed temporary pipe section in a hoisting mode, and connecting the expansion bend with the submarine pipelines at two sides underwater through flanges.
2. The expansion bend connection method of the submarine pipeline suitable for high-precision underwater in-situ control according to the step one of claim 1, wherein: the temporary pipe section is made of the same material, the same specification and the same coating structure as the submarine pipeline, and two flanges are arranged at two ends of the temporary pipe section respectively and used for being connected with the submarine pipeline.
3. The subsea pipeline expansion bend connection method suitable for high precision subsea in-situ control according to claim 1, step two, characterized by: and the temporary pipe section and the submarine pipeline are laid and installed at the same time, and are positioned at the position where the expansion bend is planned after being laid.
4. The expansion bend connection method of the submarine pipeline suitable for high-precision underwater in-situ control according to the step three of claim 1, wherein: and after the submarine pipeline is installed on the seabed, removing the temporary pipeline section by dismantling the flange by using a diver or an underwater robot, and recovering the removed temporary pipeline.
5. The expansion bend connection method of submarine pipelines suitable for high-precision underwater in-situ control according to claim 1, which comprises the following steps: after the temporary pipeline is dismantled, the relative positions of the submarine pipeline pipe ends on the two sides of the temporary pipeline section need to be measured underwater again, recheck is carried out on the relative positions and the size of the expansion bend, and the prefabricated expansion bend is hoisted to be located at the position of the original temporary pipeline section after recheck is correct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621223.XA CN113464724A (en) | 2021-06-03 | 2021-06-03 | Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621223.XA CN113464724A (en) | 2021-06-03 | 2021-06-03 | Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113464724A true CN113464724A (en) | 2021-10-01 |
Family
ID=77872212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110621223.XA Pending CN113464724A (en) | 2021-06-03 | 2021-06-03 | Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113464724A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847472A (en) * | 2021-10-21 | 2021-12-28 | 海洋石油工程股份有限公司 | Method for preventing seawater from entering during laying of submarine pipeline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070051417A1 (en) * | 2005-09-08 | 2007-03-08 | Cleveland Tubing, Inc. | Portable flexible and extendable drain pipe |
| CN101598246A (en) * | 2008-06-06 | 2009-12-09 | 中国海洋石油总公司 | The method of pipeline under the ocean flange underwater mating |
| CN101832425A (en) * | 2009-03-09 | 2010-09-15 | 中国海洋石油总公司 | Installation method of underwater tee joint of seabed pipeline |
| CN106402540A (en) * | 2016-11-25 | 2017-02-15 | 中国海洋石油总公司 | Mounting device of underwater expansion bent flange gasket |
| KR20170065989A (en) * | 2015-12-04 | 2017-06-14 | 강지원 | connection assembly of hose |
| CN212429971U (en) * | 2020-03-20 | 2021-01-29 | 海洋石油工程股份有限公司 | Novel submarine pipeline expansion bend installation auxiliary device |
-
2021
- 2021-06-03 CN CN202110621223.XA patent/CN113464724A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070051417A1 (en) * | 2005-09-08 | 2007-03-08 | Cleveland Tubing, Inc. | Portable flexible and extendable drain pipe |
| CN101598246A (en) * | 2008-06-06 | 2009-12-09 | 中国海洋石油总公司 | The method of pipeline under the ocean flange underwater mating |
| CN101832425A (en) * | 2009-03-09 | 2010-09-15 | 中国海洋石油总公司 | Installation method of underwater tee joint of seabed pipeline |
| KR20170065989A (en) * | 2015-12-04 | 2017-06-14 | 강지원 | connection assembly of hose |
| CN106402540A (en) * | 2016-11-25 | 2017-02-15 | 中国海洋石油总公司 | Mounting device of underwater expansion bent flange gasket |
| CN212429971U (en) * | 2020-03-20 | 2021-01-29 | 海洋石油工程股份有限公司 | Novel submarine pipeline expansion bend installation auxiliary device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847472A (en) * | 2021-10-21 | 2021-12-28 | 海洋石油工程股份有限公司 | Method for preventing seawater from entering during laying of submarine pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5320175A (en) | Subsea wellhead connections | |
| US3557564A (en) | Universal offshore pipeline riser clamp assembly | |
| CN110645418B (en) | Connecting method for mounting large-diameter pipeline | |
| CN113464724A (en) | Submarine pipeline expansion bend connection method suitable for high-precision underwater in-place control | |
| CN110566720A (en) | construction method of arc corridor pipeline | |
| CN108894250B (en) | Butt joint system of underwater pipeline | |
| CN110397302B (en) | Hoop welding and reinforcing method for circular tube steel structure member | |
| CN212429971U (en) | Novel submarine pipeline expansion bend installation auxiliary device | |
| CN101664776B (en) | Method for bending large-diameter arc pipe in site and large-diameter arc pipe fixing device | |
| NO335199B1 (en) | Pipe-in-pipe device | |
| Bruschi | From the longest to the deepest pipelines | |
| CN110895641A (en) | Method for criticality evaluation of submarine metallurgical composite pipe engineering containing circumferential surface crack V-shaped groove weld joint | |
| US20050116468A1 (en) | Threaded connectors for axial alignment of tubular components, and method of installing pipe sections employing such connectors | |
| CN110735970A (en) | Construction method for installing multiple continuous cold bent pipes of long-distance pipeline | |
| CN105276286A (en) | J-type laid suspension platform device | |
| CN114925413B (en) | Submarine pipeline crossing protection processing method | |
| CN101698275B (en) | Mold manufacturing method for high-acidity gas-field elbow heat insulation blocks | |
| CN206943664U (en) | A kind of Double-metal composite elbow pipe fitting | |
| CN101832425B (en) | Installation method of underwater tee joint of seabed pipeline | |
| RU2086846C1 (en) | Insertion pipe and method of erection of pipe line | |
| Tebbett | The Last Five Years' Experience in Steel Platform Repairs | |
| CN218543579U (en) | Expansion bend for connecting replacement section submarine pipeline | |
| NL2015347B1 (en) | Method for installing a subsea jumper as well as subsea jumper. | |
| US5727907A (en) | Method for the reparation of submerged pipelines | |
| CN115183075B (en) | Connection structure for municipal pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211001 |