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 section

Info

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
Application number
NL7805984A
Other languages
Dutch (nl)
Original Assignee
Tjerk Hans Duijster
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tjerk Hans Duijster filed Critical Tjerk Hans Duijster
Priority to NL7805984A priority Critical patent/NL7805984A/en
Publication of NL7805984A publication Critical patent/NL7805984A/en

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.
NL7805984A 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 NL7805984A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377001A (en) * 2001-06-29 2002-12-31 Smit Land & Marine Engineering Flowline delivery
GB2377002A (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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2377001A (en) * 2001-06-29 2002-12-31 Smit Land & Marine Engineering Flowline delivery
GB2377002A (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