CN112856039A - L-shaped shallow sea pipeline laying process - Google Patents
L-shaped shallow sea pipeline laying process Download PDFInfo
- Publication number
- CN112856039A CN112856039A CN202011584821.6A CN202011584821A CN112856039A CN 112856039 A CN112856039 A CN 112856039A CN 202011584821 A CN202011584821 A CN 202011584821A CN 112856039 A CN112856039 A CN 112856039A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- ship
- laying
- guide frame
- welding
- 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
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/03—Pipe-laying vessels
-
- 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
- F16L1/202—Accessories therefor, e.g. floats, weights fixed on or to vessels
-
- 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
- F16L1/235—Apparatus for controlling the pipe during laying
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Pipeline Systems (AREA)
Abstract
An L-shaped shallow sea pipeline laying process relates to the technical field of pipeline laying engineering, and comprises the following steps of towing a pipeline laying ship to a pipeline laying axis position, anchoring the pipeline laying ship, and adjusting the pipeline laying ship to a designed pipeline laying axis center position; hoisting two sections of steel pipes to a guide frame laid by the pipeline, sliding the pipe sections to a pipeline welding platform along a track of the guide frame, and welding the two sections of steel pipes into the pipeline; sliding the pipeline down to the stinger, and fixing the pipeline by the clamping device; hoisting the next pipe joint to the guide frame, and welding the pipe joint and the pipeline at the welding platform; loosening the pipe clamp, and launching the first two sections of pipelines by adopting a water injection method; moving the pipeline laying ship backwards and releasing, and sliding the pipeline along the pipe supporting frame to the seabed; and repeating the procedures of fixing, hoisting, welding and transferring until all the pipelines are laid. The invention can improve the construction efficiency of offshore pipeline laying, reduce the influence of environmental factors on the pipeline laying construction operation, and has better effect and higher positioning precision.
Description
Technical Field
The invention relates to the technical field of pipeline laying engineering, in particular to an L-shaped shallow sea pipeline laying process.
Background
At present, construction ship equipment adopted by offshore pipeline laying is mainly a special pipeline laying ship, and the establishment of a construction scheme is mainly carried out around the pipeline laying ship. Along with the gradual trend of offshore water supply and drainage pipeline laying engineering from the inshore region to the shallow sea region, the laying of municipal water supply and drainage pipelines in the shallow sea region is inevitably required. The available special pipeline laying ships are mostly manufactured aiming at the laying of marine petroleum pipelines in deep sea areas, and no special construction ship for laying pipelines in shallow sea areas exists. Therefore, a proper pipeline laying process needs to be established for the pipeline laying engineering project in the shallow sea area.
At present, a construction process adopted by a large-diameter offshore pipeline laying project in a shallow sea area is mainly a dragging type pipeline laying method, wherein an assembled pipeline is dragged and dropped to a specified position by using a tugboat, and then the pipeline is sunk to the seabed.
The marine large-diameter pipeline is large in dead weight and large in pipeline diameter, the marine construction operation environment is complex and changeable, the construction operation difficulty in a shallow sea area is large, the existing special pipeline laying ship cannot perform construction operation in the shallow sea area, and the problem that the construction efficiency is low and the influence of sea storms is large due to the fact that the towed pipeline laying method adopted by common shallow sea area pipeline laying construction is adopted is solved.
Aiming at the current situations that the construction efficiency of the existing dragging type pipeline laying construction process is low and the influence of storm conditions during construction operation is large, the pipeline laying construction process capable of improving the pipeline laying construction efficiency of the shallow sea area and reducing the influence of storm is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an L-shaped shallow sea pipeline laying process aiming at the defects of the prior art, which can improve the construction efficiency of offshore pipeline laying, reduce the influence of environmental factors on pipeline laying construction operation, has better pipeline laying effect and higher positioning precision of laying positions, and improves the construction quality of offshore pipeline laying.
The technical problem to be solved by the invention is realized by the following technical scheme, the invention is an L-shaped shallow sea pipeline laying process which is characterized by comprising the following steps,
(1) modifying the laying ship: a guide frame is fixedly arranged on the ship body, a track arranged along the keel direction of the ship body is arranged on the guide frame, a pipe support frame extending out of the ship body is arranged in front of the guide frame, and the rear end of the pipe support frame is hinged with the front end of the ship body; a clamping device is fixedly installed between the guide frame and the stinger, a welding platform for pipeline butt joint is arranged on the guide frame, a winch is arranged on the ship body, raking rods are symmetrically arranged at the front end of the ship body and at two sides of the stinger, a steel wire rope of the winch bypasses the raking rods and then is connected with the front end of the stinger, and four anchors are arranged at four corners of the ship body; beacon machines and GPS are arranged at the bow and the stern of the ship;
(2) positioning the pipeline laying ship: dragging the pipeline laying ship to the position of a pipeline laying axis by using a tug, then carrying out anchoring by using an anchoring ship, respectively throwing anchor cables at four corners of the pipeline laying ship, accurately positioning the pipeline laying axis by using a beacon machine and a GPS (global positioning system), and adjusting the pipeline laying ship to the central position of the designed pipeline laying axis;
(3) laying the first two sections of pipelines:
a. welding a pipeline: hoisting two sections of steel pipes to a guide frame laid by a pipeline by using a crawler crane arranged on a barge deck, sliding the pipe sections to a pipeline welding platform along a track of the guide frame, and welding the two sections of steel pipes at the welding platform; after the two sections of steel pipes are welded, detecting a welding seam, and performing corrosion prevention work inside and outside the pipeline after the detection is qualified;
b. fixing the pipe section: slowly sliding the welded pipeline down to the stinger by using a winch, fixing the position of the pipeline by using a clamping device, and giving out a pipe joint on the guide frame;
c. adding pipe joints: hoisting the next pipe joint to the guide frame through the crawler crane, sliding the pipe joint to the pipeline welding platform along the track of the guide frame, and welding the pipe joint and the pipeline at the welding platform;
d. water injection and downward placing: loosening the pipe clamp, slowly launching the pipeline into water by using a winch, injecting water into the pipeline by using a water pump, overcoming buoyancy and sinking after injecting water into the pipeline, moving the pipeline laying ship backwards and releasing while injecting water, and controlling the backward speed of the pipeline laying ship to be consistent with the water injection speed; the pipeline slides downwards along the stinger to the seabed to ensure that the pipeline is laid and sunk on a preset laying route until the laying of the first two sections of pipelines is finished, and a clamp is used for fixing the position of the pipeline;
(4) and (3) laying a subsequent pipeline:
a. adding pipe joints: hoisting the next pipe joint to the guide frame through the crawler crane, sliding the pipe joint to the pipeline welding platform along the track of the guide frame, and welding the pipe joint and the pipeline at the welding platform; detecting a welding line after welding is finished, and performing corrosion prevention work inside and outside the pipeline after the detection is qualified;
b. lowering the pipeline: loosening the pipe clamping device, moving the pipeline laying ship backwards and putting the pipeline laying ship back, and sliding the pipeline down to the seabed along the pipe supporting frame to ensure that the pipeline is laid and sunk on a preset laying route;
(5) and (5) repeating the step (4) until all the pipelines are laid.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: the anchor cable length in step (2) is 300 m.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: and (2) adjusting the pipeline laying ship to the central position of the designed pipeline laying axis in a manner of retracting and releasing the anchor cable.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: in the step (3), the left-right deviation of the pipeline laying ship is adjusted and the advancing speed of the ship is controlled by controlling the ship moving anchor machine to twist the traction anchor cable, and simultaneously matching the 2 ship moving anchor machines and the 1 main traction winch with the twisted anchor cable or the loose anchor cable, so that the ship always advances along the pipeline laying axis direction in the advancing process.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: a steel pipe stacking area is arranged on the ship body on one side of the guide frame.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: the ship body is provided with a crawler crane.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: two welding platforms are arranged on the guide frame.
The technical problem to be solved by the invention can be further realized by the following technical scheme, in the L-shaped shallow sea pipeline laying process: in the step (4), two pipe joints are hoisted to the guide frame every time, and the two welding platforms perform welding work simultaneously.
Compared with the prior art, the invention has the beneficial effects that:
hoisting the pipe sections to the guide frame, and enabling the pipe sections to slide downwards along the guide frame for laying; two adjacent pipe sections are welded into a pipeline at the welding platform, and the pipeline is supported and guided to slide downwards for laying by using the stinger, so that the construction efficiency of pipeline laying operation can be greatly improved; in the process of lowering the pipeline, the clamp is utilized to control the sliding speed of the pipeline, so that the purpose of stably laying the pipeline is achieved, the construction safety risk of the offshore pipeline laying operation can be reduced, the construction quality of the offshore pipeline laying is improved, the structure is reliable, and the operation is convenient and efficient;
the pipe joints are welded, fixed, increased and lowered, the pipe joints are welded in a sectional welding flow construction mode, the continuous construction of long-distance pipelines can be realized, and the construction efficiency is greatly improved by simultaneously carrying out the welding and laying operation of the pipelines;
the pipeline is initially filled with water, the pipeline is controlled to slide and sink by adopting a water injection method, water is injected into the pipeline, the gravity of the pipeline is improved, the buoyancy is overcome, and the pipeline is helped to sink; the method comprises the following steps of controlling the laying ship to retreat while injecting water into the pipeline, controlling the water injection speed to be consistent with the retreating speed of the laying ship, improving the laying efficiency of the pipeline, reducing the influence of sea storms on the laying of the pipeline, and ensuring that the pipeline is laid on a preset laying route to sink;
compared with the traditional towed pipeline laying method, the method has the advantages that the influence of marine environment load is small when the pipeline laying operation is carried out at sea, and the construction operation condition is more stable and reliable. The pipe abandoning operation under the severe sea condition can be realized, the construction window period is longer, and the construction safety is higher. The movement of the pipeline laying ship is controlled in the anchor reaming mode of the anchor machine, the influence of sea storms on pipeline laying construction can be reduced to the greatest extent, the pipeline laying effect is good, the positioning accuracy of laying positions is higher, and the construction quality can be better controlled. The pipeline laying of the large-diameter pipeline in the shallow sea area can be realized, and the pipeline laying efficiency is higher.
Drawings
FIG. 1 is a schematic structural view of a vessel dedicated for pipeline laying in shallow sea;
FIG. 2 is an elevation view of the construction of laying pipeline in "L" type shallow sea;
figure 3 is a schematic of a pipelaying axis.
In the figure: 1. the method comprises the following steps of (1) carrying a stinger, 2. a derrick, 3. a clamp, 4. a welding platform, 5. a crawler crane, 6. a winch, 7. a guide frame, 8. an anchor cable, 9. an anchor machine, 10. a steel pipe stacking area, 11. a pipeline, 12. a pipeline water injection section and 13. a laid pipeline; A. the pipeline laying axis direction, and B, the moving direction of the laying ship.
Detailed Description
The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
The ship special for laying the pipeline in the shallow sea area comprises a ship body, wherein a guide frame 7 is fixedly arranged on the ship body, a track arranged along the keel direction of the ship body is arranged on the guide frame 7, a pipe support frame 1 extending out of the ship body is arranged in front of the guide frame 7, and the rear end of the pipe support frame 1 is hinged with the front end of the ship body; a gripper 3 is fixedly installed between the guide frame 7 and the stinger 1, and the gripper 3 can grip and release the pipeline 11, thereby controlling the speed of the pipeline 11 to slide. And a welding platform 4 for butting the pipelines 11 is arranged on the guide frame 7. A steel pipe stacking area 10 for storing pipe joints is arranged on one side of the guide frame 7, a 150t crawler crane 5 is arranged on the ship body, and the crawler crane 5 is used for hoisting the pipe joints from the steel pipe stacking area 10 to the guide frame 7. Still be equipped with 15t hoist engine 6 on the hull, be equipped with gin pole 2 at the hull front end and lie in stinger 1 both sides symmetry, the wire rope of hoist engine 6 walks around behind gin pole 2 and meets with stinger 1 front end, and 6 rolling wire rope of hoist engine can mention and transfer stinger 1, transfer stinger 1 and can transfer into water with pipeline 11 on the stinger 1. Four 15t anchor machines 9 are arranged at the four corners of the hull.
With reference to fig. 2, fig. 3 shows an L-shaped shallow sea pipeline laying process using a shallow sea pipeline laying vessel, which comprises the following steps,
an L-shaped shallow sea pipeline laying process is characterized in that: the method comprises the following steps of,
(1) modifying the laying ship: a guide frame 7 is fixedly arranged on the ship body, a track arranged along the keel direction of the ship body is arranged on the guide frame 7, a stinger 1 extending out of the ship body is arranged in front of the guide frame 7, and the rear end of the stinger 1 is hinged with the front end of the ship body; a clamping device 3 is fixedly arranged between a guide frame 7 and a stinger 1, a welding platform 4 for butt joint of pipelines 11 is arranged on the guide frame 7, a winch 6 is arranged on a ship body, raking rods 2 are symmetrically arranged at the front end of the ship body and at two sides of the stinger 1, a steel wire rope of the winch 6 bypasses the raking rods 2 and then is connected with the front end of the stinger 1, and four anchors 9 are arranged at four corners of the ship body; beacon machines and GPS are arranged at the bow and the stern of the ship;
(2) positioning the pipeline laying ship: dragging the pipeline laying ship to the position of a pipeline laying axis by using a tug, then carrying out anchoring by using an anchoring ship, respectively throwing anchor cables 8 at four corners of the pipeline laying ship, accurately positioning the pipeline laying axis by using a beacon machine and a GPS (global positioning system), and adjusting the pipeline laying ship to the central position of the designed pipeline laying axis;
(3) laying the first two sections of pipelines:
a. welding a pipeline: hoisting two sections of steel pipes to a guide frame 7 laid by a pipeline 11 by using a crawler crane 5 arranged on a barge deck, sliding the pipe sections to a pipeline welding platform 4 along a track of the guide frame 7, and welding the two sections of steel pipes at the welding platform 4; after the two sections of steel pipes are welded, detecting a welding seam, and performing internal and external corrosion prevention work on the pipeline 11 after the welding seam is detected to be qualified;
b. fixing the pipe section: slowly sliding the welded pipeline 11 downwards to the stinger 1 by using a winch 6, fixing the position of the pipeline 11 by using a clamp 3, and giving out a pipe section on the guide frame 7;
c. adding pipe joints: hoisting the next pipe joint to the guide frame 7 through the crawler crane 5, sliding the pipe joint to the pipeline welding platform 4 along the track of the guide frame 7, and welding the pipe joint and the pipeline 11 at the welding platform 4;
d. water injection and downward placing: loosening the pipe clamp, slowly discharging the pipeline 11 into water by using the winch 6, then injecting water into the pipeline 11 by using the water pump, overcoming buoyancy force to sink the pipeline 11 after injecting water, and moving the pipeline laying ship backwards and backwards while injecting water, wherein the backward speed of the laying ship is controlled to be consistent with the water injection speed, as shown in a pipeline water injection section 12 in figure 2; the pipeline 11 slides downwards along the stinger 1 to the seabed to ensure that the pipeline 11 is laid and sunk on a preset laying route until the first two sections of pipelines 11 are laid, and the position of the pipeline 11 is fixed by using the clamp 3; when the pipeline 11 initially enters water, the pipeline 11 is controlled to slide and sink by adopting a water injection method, water is injected into the pipeline 11, the gravity of the pipeline 11 is improved, the buoyancy is overcome, and the pipeline 11 is helped to sink; the method comprises the steps of controlling the laying ship to retreat while injecting water into the pipeline 11, controlling the water injection speed to be consistent with the retreating speed of the laying ship, filling water into the pipeline 11 in the same time, and enabling the length of a laid pipeline 13 to be equal to the retreating distance of the laying ship, so that the laying efficiency of the pipeline 11 is improved, the influence of sea storms on the laying of the pipeline 11 is reduced, and the pipeline 11 is guaranteed to lay and sink on a preset laying route;
(4) and (3) laying a subsequent pipeline:
a. adding pipe joints: hoisting the next pipe joint to the guide frame 7 through the crawler crane 5, sliding the pipe joint to the pipeline welding platform 4 along the track of the guide frame 7, and welding the pipe joint and the pipeline 11 at the welding platform 4; detecting a welding seam after welding is finished, and performing internal and external corrosion prevention work on the pipeline 11 after the detection is qualified;
b. lowering the pipeline: loosening the pipe clamps, moving the pipeline laying ship backwards and back, sliding the pipeline 11 downwards along the stinger 1 to the seabed, and ensuring that the pipeline 11 is laid and sunk on a preset laying route;
(5) and (5) repeating the step (4) until all the pipelines 11 are laid.
The length of the anchor line 8 in step (2) is 300 m.
In the step (2), the pipeline laying ship is adjusted to the central position of the designed pipeline laying axis in a manner of retracting the anchor cable 8.
In the step (3), the left-right deviation of the pipeline laying ship and the advancing speed of the ship are adjusted by controlling the ship moving anchor machine 9 to twist the traction anchor cable 8, 2 ship moving anchor machines 9 and 1 main traction winch 6 to simultaneously cooperate with the twisting anchor cable 8 or the loose anchor cable 8, so that the ship can always advance along the pipeline laying axis direction in the advancing process.
A steel pipe piling area 10 is arranged on the hull on one side of the guide frame 7.
The ship body is provided with a crawler crane 5.
Two welding platforms 4 are arranged on the guide frame 7.
In the step (4), two pipe joints are hoisted to the guide frame 7 every time, and the two welding platforms 4 perform welding work simultaneously.
Claims (8)
1. An L-shaped shallow sea pipeline laying process is characterized in that: the method comprises the following steps of,
(1) modifying the laying ship: a guide frame is fixedly arranged on the ship body, a track arranged along the keel direction of the ship body is arranged on the guide frame, a pipe support frame extending out of the ship body is arranged in front of the guide frame, and the rear end of the pipe support frame is hinged with the front end of the ship body; a clamping device is fixedly installed between the guide frame and the stinger, a welding platform for pipeline butt joint is arranged on the guide frame, a winch is arranged on the ship body, raking rods are symmetrically arranged at the front end of the ship body and at two sides of the stinger, a steel wire rope of the winch bypasses the raking rods and then is connected with the front end of the stinger, and four anchors are arranged at four corners of the ship body; beacon machines and GPS are arranged at the bow and the stern of the ship;
(2) positioning the pipeline laying ship: dragging the pipeline laying ship to the position of a pipeline laying axis by using a tug, then carrying out anchoring by using an anchoring ship, respectively throwing anchor cables at four corners of the pipeline laying ship, accurately positioning the pipeline laying axis by using a beacon machine and a GPS (global positioning system), and adjusting the pipeline laying ship to the central position of the designed pipeline laying axis;
(3) laying the first two sections of pipelines:
a. welding a pipeline: hoisting two sections of steel pipes to a guide frame laid by a pipeline by using a crawler crane arranged on a barge deck, sliding the pipe sections to a pipeline welding platform along a track of the guide frame, and welding the two sections of steel pipes at the welding platform; after the two sections of steel pipes are welded, detecting a welding seam, and performing corrosion prevention work inside and outside the pipeline after the detection is qualified;
b. fixing the pipe section: slowly sliding the welded pipeline down to the stinger by using a winch, fixing the position of the pipeline by using a clamping device, and giving out a pipe joint on the guide frame;
c. adding pipe joints: hoisting the next pipe joint to the guide frame through the crawler crane, sliding the pipe joint to the pipeline welding platform along the track of the guide frame, and welding the pipe joint and the pipeline at the welding platform;
d. water injection and downward placing: loosening the pipe clamp, slowly launching the pipeline into water by using a winch, injecting water into the pipeline by using a water pump, overcoming buoyancy and sinking after injecting water into the pipeline, moving the pipeline laying ship backwards and releasing while injecting water, and controlling the backward speed of the pipeline laying ship to be consistent with the water injection speed; the pipeline slides downwards along the stinger to the seabed to ensure that the pipeline is laid and sunk on a preset laying route until the laying of the first two sections of pipelines is finished, and a clamp is used for fixing the position of the pipeline;
(4) and (3) laying a subsequent pipeline:
a. adding pipe joints: hoisting the next pipe joint to the guide frame through the crawler crane, sliding the pipe joint to the pipeline welding platform along the track of the guide frame, and welding the pipe joint and the pipeline at the welding platform; detecting a welding line after welding is finished, and performing corrosion prevention work inside and outside the pipeline after the detection is qualified;
b. lowering the pipeline: loosening the pipe clamping device, moving the pipeline laying ship backwards and putting the pipeline laying ship back, and sliding the pipeline down to the seabed along the pipe supporting frame to ensure that the pipeline is laid and sunk on a preset laying route;
(5) and (5) repeating the step (4) until all the pipelines are laid.
2. An L-type shallow sea pipelaying process according to claim 1, wherein: the anchor cable length in step (2) is 300 m.
3. An L-type shallow sea pipelaying process according to claim 1, wherein: and (2) adjusting the pipeline laying ship to the central position of the designed pipeline laying axis in a manner of retracting and releasing the anchor cable.
4. An L-type shallow sea pipelaying process according to claim 1, wherein: in the step (3), the left-right deviation of the pipeline laying ship is adjusted and the advancing speed of the ship is controlled by controlling the ship moving anchor machine to twist the traction anchor cable, and simultaneously matching the 2 ship moving anchor machines and the 1 main traction winch with the twisted anchor cable or the loose anchor cable, so that the ship always advances along the pipeline laying axis direction in the advancing process.
5. An L-type shallow sea pipelaying process according to claim 1, wherein: a steel pipe stacking area is arranged on the ship body on one side of the guide frame.
6. An L-type shallow sea pipelaying process according to claim 1, wherein: the ship body is provided with a crawler crane.
7. An L-type shallow sea pipelaying process according to claim 1, wherein: two welding platforms are arranged on the guide frame.
8. An L-type shallow sea pipelaying process according to claim 7, wherein: in the step (4), two pipe joints are hoisted to the guide frame every time, and the two welding platforms perform welding work simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011584821.6A CN112856039A (en) | 2020-12-28 | 2020-12-28 | L-shaped shallow sea pipeline laying process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011584821.6A CN112856039A (en) | 2020-12-28 | 2020-12-28 | L-shaped shallow sea pipeline laying process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112856039A true CN112856039A (en) | 2021-05-28 |
Family
ID=75997982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011584821.6A Pending CN112856039A (en) | 2020-12-28 | 2020-12-28 | L-shaped shallow sea pipeline laying process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112856039A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823351A (en) * | 2022-12-29 | 2023-03-21 | 中交第四航务工程局有限公司 | Method for installing submarine pipeline at shoal section and method for designing installation parameters |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB942218A (en) * | 1960-04-09 | 1963-11-20 | Electricite De France | Improvements in or relating to the positioning or laying of submarine tubes |
| CN101280862A (en) * | 2007-04-03 | 2008-10-08 | 上海市基础工程公司 | Seabed PE pipe rim spreading and imbedding construction method |
| CN101319739A (en) * | 2007-06-08 | 2008-12-10 | J.雷.麦克德莫特股份有限公司 | Strongback traveling clamp |
| CN102374338A (en) * | 2010-08-20 | 2012-03-14 | 中国海洋石油总公司 | Process for laying deepwater S-shaped submarine pipeline |
| CN203847824U (en) * | 2014-05-13 | 2014-09-24 | 江苏力劲重工有限公司 | Mobile welding vehicle for continuously welding and laying plastic conduits |
| CN107701802A (en) * | 2017-10-31 | 2018-02-16 | 上海振华重工(集团)股份有限公司 | J-type and the compound deep-sea pipe laying system of S types |
-
2020
- 2020-12-28 CN CN202011584821.6A patent/CN112856039A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB942218A (en) * | 1960-04-09 | 1963-11-20 | Electricite De France | Improvements in or relating to the positioning or laying of submarine tubes |
| CN101280862A (en) * | 2007-04-03 | 2008-10-08 | 上海市基础工程公司 | Seabed PE pipe rim spreading and imbedding construction method |
| CN101319739A (en) * | 2007-06-08 | 2008-12-10 | J.雷.麦克德莫特股份有限公司 | Strongback traveling clamp |
| CN102374338A (en) * | 2010-08-20 | 2012-03-14 | 中国海洋石油总公司 | Process for laying deepwater S-shaped submarine pipeline |
| CN203847824U (en) * | 2014-05-13 | 2014-09-24 | 江苏力劲重工有限公司 | Mobile welding vehicle for continuously welding and laying plastic conduits |
| CN107701802A (en) * | 2017-10-31 | 2018-02-16 | 上海振华重工(集团)股份有限公司 | J-type and the compound deep-sea pipe laying system of S types |
Non-Patent Citations (1)
| Title |
|---|
| 张捷等: "海底管道安装分析及铺设工艺", 《石油和化工设备》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115823351A (en) * | 2022-12-29 | 2023-03-21 | 中交第四航务工程局有限公司 | Method for installing submarine pipeline at shoal section and method for designing installation parameters |
| CN115823351B (en) * | 2022-12-29 | 2023-06-20 | 中交第四航务工程局有限公司 | Installation method and installation parameter design method for submarine pipeline at shoal section |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101280862B (en) | Seabed PE pipe rim spreading and imbedding construction method | |
| CN108502110B (en) | Drop tube stone throwing ship | |
| CN112728211B (en) | Construction method for carrying sewage sea area sea drainage pipe to put water in place and carry at sea in place | |
| CN104631602A (en) | Construction method of pipeline in sea area for sewage deep sea disposal engineering | |
| US4051687A (en) | Pipeline laying method | |
| CN112856039A (en) | L-shaped shallow sea pipeline laying process | |
| US4051688A (en) | Offshore structure and method | |
| CN106704705B (en) | overwater pipeline assembling operation method and system | |
| CN2381861Y (en) | Pipeline laying apparatus at shallow seabed | |
| US3834169A (en) | Method and apparatus for laying large diameter pipeline segments offshore | |
| CN112856040B (en) | Novel sea area pipeline laying floating assisting method | |
| JP2005121077A (en) | Submarine pipe laying method | |
| CN214451696U (en) | Special ship for laying pipeline in shoal area | |
| CN113585343B (en) | Cable-stayed suspension tunnel with cable flow pier and construction method thereof | |
| US7559721B2 (en) | Towing and installation method for deepwater pipelines and risers | |
| US3690111A (en) | Offshore pipeline installation method | |
| CN113879487A (en) | Non-self-floating immersed tube discharging method | |
| CN109163144A (en) | Submarine pipeline terminates the repositioning method of submarine pipeline terminal when being laid with | |
| CN111692427A (en) | Underwater positioning method for large-diameter overlong HDPE (high-density polyethylene) pipeline | |
| CN113294591B (en) | Arrangement method for dragging steel cable of submarine pipeline between islands | |
| CN104565537A (en) | Synchronous laying and buried depth construction method for seabed glass reinforced plastic pipelines | |
| CN117869667B (en) | Method for paving submarine water pipeline under navigation condition | |
| RU2324100C2 (en) | Method of underwater pipe laying, realization system and complexes of joining pipes used | |
| CN214466571U (en) | Pipeline laying tool platform | |
| CN114458830B (en) | HDPE water intake pipeline laying method and pipe laying ship for power plant gas unit extension project |
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 |
Application publication date: 20210528 |
|
| RJ01 | Rejection of invention patent application after publication |