NL7805984A - Transporting prefabricated pipeline sections and laying on the sea-bed - using submerged carrying pipe with adjustable ballast to suspend during transport and lower pipeline section - Google Patents
Transporting prefabricated pipeline sections and laying on the sea-bed - using submerged carrying pipe with adjustable ballast to suspend during transport and lower pipeline sectionInfo
- Publication number
- NL7805984A NL7805984A NL7805984A NL7805984A NL7805984A NL 7805984 A NL7805984 A NL 7805984A NL 7805984 A NL7805984 A NL 7805984A NL 7805984 A NL7805984 A NL 7805984A NL 7805984 A NL7805984 A NL 7805984A
- Authority
- NL
- Netherlands
- Prior art keywords
- pipe
- pipeline section
- submerged
- carrier
- pipeline
- Prior art date
Links
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
- F16L1/163—Laying or reclaiming pipes on or under water on the bottom by varying the apparent weight of the pipe during the laying operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Underwater pipeline is prefabricated to a selected length and then transported to its location and sunk to the seabed. During the transport, the pipeline section is suspended from a submerged carrying pipe with adjustable ballast so that the depth of the assembly can be adjusted to be without the range of influence of surface waves. Once at the location, the pipe and carrying pipe is lowered to the seabed by increasing the ballast of the carrying assembly after which, the latter is removed. The final positioning of the pipeline section takes place by allowing the pipeline to just touch the seabed until the correct position has been attained and then allowing its full weight to rest on the bottom. The length of the transporting pipe is equal to or greater than the length of the pipeline section. The transport depth can be gauged by means of depth gauges attached to the carrier pipe and protruding above the water surface. The assembly is preferably towed by means of a submarine or a towboat linked to the carrier pipe via cable and an intermediate sinker whose weight counterbalance the upward force of the two cable so that the carrier is only subjected to a horizontal force. Transport system enables large pipe sections to be prefabricated in shallow, calm waters and then transported to location eliminating much of the deep water fabrication work. The submerged carrier prevents the pipeline section from being damaged by surface wave conditions during transit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7805984A NL7805984A (en) | 1978-06-01 | 1978-06-01 | Transporting prefabricated pipeline sections and laying on the sea-bed - using submerged carrying pipe with adjustable ballast to suspend during transport and lower pipeline section |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7805984A NL7805984A (en) | 1978-06-01 | 1978-06-01 | Transporting prefabricated pipeline sections and laying on the sea-bed - using submerged carrying pipe with adjustable ballast to suspend during transport and lower pipeline section |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7805984A true NL7805984A (en) | 1979-12-04 |
Family
ID=19830965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7805984A NL7805984A (en) | 1978-06-01 | 1978-06-01 | Transporting prefabricated pipeline sections and laying on the sea-bed - using submerged carrying pipe with adjustable ballast to suspend during transport and lower pipeline section |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL7805984A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2377002A (en) * | 2001-06-29 | 2002-12-31 | Smit Land & Marine Engineering | Flowline delivery |
GB2377001A (en) * | 2001-06-29 | 2002-12-31 | Smit Land & Marine Engineering | Flowline delivery |
WO2003002848A1 (en) * | 2001-06-29 | 2003-01-09 | Smit Land & Marine Engineering Limited | Method of laying an underwater flowline |
US9944358B2 (en) | 2014-01-15 | 2018-04-17 | Acergy France SAS | Transportation and installation of subsea rigid tie-in connections |
US10174865B2 (en) | 2014-07-04 | 2019-01-08 | Subsea 7 Limited | Towable subsea oil and gas production systems |
CN111231104A (en) * | 2020-01-17 | 2020-06-05 | 北京九州动脉隧道技术有限公司 | Segment prefabrication and sinking process for underwater construction |
US10753509B2 (en) | 2016-12-29 | 2020-08-25 | Acergy France SAS | Controlling buoyancy when towing, lowering and raising submerged structures |
-
1978
- 1978-06-01 NL NL7805984A patent/NL7805984A/en not_active Application Discontinuation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2377002A (en) * | 2001-06-29 | 2002-12-31 | Smit Land & Marine Engineering | Flowline delivery |
GB2377001A (en) * | 2001-06-29 | 2002-12-31 | Smit Land & Marine Engineering | Flowline delivery |
WO2003002848A1 (en) * | 2001-06-29 | 2003-01-09 | Smit Land & Marine Engineering Limited | Method of laying an underwater flowline |
US9944358B2 (en) | 2014-01-15 | 2018-04-17 | Acergy France SAS | Transportation and installation of subsea rigid tie-in connections |
US10174865B2 (en) | 2014-07-04 | 2019-01-08 | Subsea 7 Limited | Towable subsea oil and gas production systems |
US10753509B2 (en) | 2016-12-29 | 2020-08-25 | Acergy France SAS | Controlling buoyancy when towing, lowering and raising submerged structures |
CN111231104A (en) * | 2020-01-17 | 2020-06-05 | 北京九州动脉隧道技术有限公司 | Segment prefabrication and sinking process for underwater construction |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A1B | A search report has been drawn up | ||
BV | The patent application has lapsed |