DK144665B - APPARATUS FOR SUPPORTING A PIPELINE ON THE BOTTOM OF A WATER AREA - Google Patents

APPARATUS FOR SUPPORTING A PIPELINE ON THE BOTTOM OF A WATER AREA Download PDF

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Publication number
DK144665B
DK144665B DK15878A DK15878A DK144665B DK 144665 B DK144665 B DK 144665B DK 15878 A DK15878 A DK 15878A DK 15878 A DK15878 A DK 15878A DK 144665 B DK144665 B DK 144665B
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DK
Denmark
Prior art keywords
pipeline
wedge
seabed
water
stresses
Prior art date
Application number
DK15878A
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Danish (da)
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DK15878A (en
DK144665C (en
Inventor
G Bertaccini
Original Assignee
Snam Progetti
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 Snam Progetti filed Critical Snam Progetti
Publication of DK15878A publication Critical patent/DK15878A/en
Priority to DK376981A priority Critical patent/DK145434C/en
Publication of DK144665B publication Critical patent/DK144665B/en
Application granted granted Critical
Publication of DK144665C publication Critical patent/DK144665C/en

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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
    • F16L1/20—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
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/14—Laying or reclaiming pipes on or under water between the surface and the bottom

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supports For Pipes And Cables (AREA)
  • Earth Drilling (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Cleaning In General (AREA)
  • Pipeline Systems (AREA)

Description

144665144665

Opfindelsen vedrører et apparat til understøtning af en rørledning på bunden af et vandområde til opnåelse af en forud valgt geometrisk form af rørledningen, der er udlagt over en fordybning eller en forsænk-5 ning i nævnte bund, hvilket apparat omfatter et stift stativ, der har en trekantet form med en skrå side, og som er indrettet til at sænkes ned på havbunden ved hjælp af et servicefartøj og af et undervandsfartøj bugseres ind under rørledningen på det sted, hvor den 10 skal understøttes.BACKGROUND OF THE INVENTION The invention relates to an apparatus for supporting a pipeline at the bottom of a water region to obtain a preselected geometric shape of the pipeline laid over a recess or recess in said bottom, which apparatus comprises a rigid frame having a triangular shape with an inclined side adapted to be lowered to the seabed by a service vessel and by an underwater vessel is towed under the pipeline at the location where it is to be supported.

Havbunden er meget ofte ikke plan, men udviser hindringer af forskellig art, såsom steder med klipper eller fordybninger, i hvilke en rørledning ville være frit hængende.The seabed is very often not level, but exhibits obstacles of different kinds, such as places with rocks or depressions, in which a pipeline would hang freely.

15 Medens udlægning af rørledninger hidtil har været begrænset til grundt vand, har det været muligt at undgå sådanne vanskeligheder i forbindelse med naturlige hindringer på havbunden ved på passende måde at ændre udlægningsforløbet. På grund af det stadig stigende 20 behov for udlægning af rørledninger på dybt vand er det ikke altid muligt at passere uden om sådanne hindringer, så at en rørledning ville blive frit hængende selv på dybe og brede havbundsforsænkninger.15 While pipeline laying has so far been limited to shallow water, it has been possible to avoid such difficulties associated with natural obstacles on the seabed by appropriately changing the laying process. Due to the ever-increasing need for laying of pipelines in deep water, it is not always possible to pass such obstacles, so that a pipeline would hang freely even on deep and wide seabed depressions.

Specielt ved udlægning af rørledninger på store 25 havdybder er det meget vigtigt at understøtte rørledningen på bunden af vandområdet med hensyntagen til fordybninger eller klippefremspring ved hjælp af understøtningselementer, der er indrettet til at hindre, at en del af den ophængte rørledning bliver bøjet med 30 deraf følgende uheldige bugter og bøjninger og eventuelt brud på røret.Especially when laying pipelines at large depths of 25, it is very important to support the pipeline at the bottom of the water area with regard to recesses or rock protrusions by means of support elements arranged to prevent a portion of the suspended pipeline from being bent by 30 thereof. following unfortunate bends and bends and possible breakage of the pipe.

Fra USA patentskrift nr. 2 405 819 kendes der en understøtning for en rørledning, hvilken rørledning omfatter et stift stativ med trekantet form og med en 35 skrå side. Dette apparat er indrettet til at skydes ind under vedkommende rørledning, hvorpå der på den skrå side monteres en vandret arm i passende højde, idet 2 144665 denne arm fastgøres ved hjælp af en tap gennem den skrå side. Et sådant stativ vil ikke være egnet til brug ved understøtning af en rørledning på bunden af et vandområde, eftersom beliggenheden af den vandrette arm ikke kan 5 ændres ved fjernstyring, idet understøtningsarmen kun kan flyttes manuelt i forhold til selve understøtningskonstruktionen.From United States Patent No. 2,405,819, a support for a pipeline is known, the pipeline comprising a rigid stand of triangular shape and having a 35 inclined side. This apparatus is adapted to be slid under the relevant pipeline, whereupon on the inclined side is mounted a horizontal arm of suitable height, the arm being secured by means of a pin through the inclined side. Such a tripod will not be suitable for use in supporting a pipeline at the bottom of a water area, since the position of the horizontal arm cannot be changed by remote control, since the support arm can only be moved manually relative to the support structure itself.

Med opfindelsen tilsigtes der tilvejebragt et apparat til understøtning af en rørledning på bunden af et 10 vandområde, hvilket apparat er enkelt og let at placere under rørledningen og let at regulere i stillingen.The invention is intended to provide an apparatus for supporting a pipeline at the bottom of a water area, which apparatus is simple and easy to place under the pipeline and easy to adjust in position.

Apparatet ifølge opfindelsen er ejendommeligt ved, at det stive stativ ved de indre sidekanter har to ensliggende tandstænger, der er beregnet til at samvirke med 15 en kile til i apparatets brugsstilling at trykke rørledningen opefter, hvilken kile er indrettet til at forskydes styret langs den med tandstænger forsynede skrå side,f .eks. ved træk i et kabel, der er fast forbundet med kilen og passerer omkring to frit drejelige kabelskiver ved enderne 20 af den skrå side, at apparatet har låseorganer, som udgøres af spærrepaler, der er understøttet på kilen, og som er beregnet til at samvirke med tandstængerne, og at apparatet har anlægsorganer i form af en bred bundplade, der er fastgjort til undersiden af det trekantede stativ 25 og er indrettet til at ligge an mod nævnte bund.The apparatus according to the invention is characterized in that the rigid frame at the inner side edges has two identical toothed rods, which are intended to cooperate with a wedge to push the pipe upwards in the operating position of the apparatus, which wedge is arranged to be displaced guided along it with toothed rails inclined side, e.g. by pulling on a cable which is firmly connected to the wedge and passes about two freely pivotable cable discs at the ends 20 of the inclined side, that the apparatus has locking means which are constituted by latches supported on the wedge and which are intended to cooperate with the rods, and that the apparatus has abutment means in the form of a wide base plate fixed to the underside of the triangular frame 25 and arranged to abut against said bottom.

Et sådant trekantet stativ kan bruges, hvis havbunden, uanset om den er mudret, sandet eller er i form af klippegrund, er jævn nok til at muliggøre et pålideligt anlæg for den brede bundplade på apparatet, og hvis 30 afstanden fra havbunden til den ophængte rørledning ikke overstiger den højde, der kan opnås med den skrå side med tandstængerne på apparatet på det sted, hvor rørledningen skal understøttes.Such a triangular stand can be used if the seabed, whether muddy, sandy or in the form of rocky ground, is even enough to allow a reliable installation of the wide base plate of the apparatus and if the distance from the seabed to the suspended pipeline does not exceed the height attainable by the inclined side of the toothed rods of the apparatus at the location where the pipeline is to be supported.

Opfindelsen forklares nærmere i det følgende under 35 henvisning til tegningen, hvor fig. 1 er et skematisk billede set i rørledningens 3 144665 retning af apparatet ifølge opfindelsen, og fig. 2 et sidebillede af apparatet i fig. 1.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 is a schematic view in the direction of the pipeline of the apparatus according to the invention, and FIG. 2 is a side view of the apparatus of FIG. First

I fig. 1 og 2 angiver henvisningstallet 1 det stive, trekantede stativ til understøtning af en rørled-5 ning 2 og til at trykke rørledningen opefter fra dennes underside, hvilken rørledning er ophængt over en havbundsforsænkning på dybt vand. Stativet består i hovedsagen af to trekantede rammer, der hver omfatter en skrå sidebjælke 3, en bundbjælke 4, en sidebjælke 5 samt forstærk-ningsstøtter 6, der er parallelle og er indbyrdes forbundne med forbindelsesstivere 7 (i fig. 1 er der kun vist én ramme, idet den anden ligger bagved denne). På de modstående flader af de skrå sidebjælker 3 af stativet er der et langagtigt styr 8 for de to sidekanter 15 af en kile 10, og der er to tandstænger 11, som samvirker med to spærrepaler 12, som er hængslet til kilen 10 og af fjedre 13 trykkes mod tandstangen, så at kilen kun kan løftes langs de skrå sider 3, men ikke kan glide tilbage. Kilen trykkes opefter styret af de skrå side-20 bjælker 3 ved hjælp af en trækmekanisme, der ikke er vist på tegningen, og som er monteret på det samme stativ eller på et undervandsfartøj, hvilken mekanisme indvirker på et kabel 14, der er fastgjort ved den ene ende til kilen, er ført omkring en frit drejelig kabelski-25 ve 15, som er monteret på en aksel 16 ved den øverste ende af de skrå sidebjælker 3 af stativet, og som derefter er ført omkring en anden frit drejelig kabelskive 17, som er monteret på en aksel 18 ved de nederste ender af de skrå sidebjælker 3. Fig. 1 viser også en ring 30 19, som er fastgjort til den anden ende af kablet 14 til lettelse af forbindelsen til trækmekanismen på undervandsfartøjet. Endelig er der under bundbjælken 4 af det trekantede stativ en bred bundplade 20, der har kanter 21, for at det skal kunne være lettere for under-35 vandsfartøjet at trække stativet ind under den rørledning, der skal understøttes.In FIG. 1 and 2, reference numeral 1 denotes the rigid triangular frame for supporting a pipeline 2 and for pushing the pipeline upward from its underside, which is suspended over a deep seabed depression. The frame consists essentially of two triangular frames, each comprising an inclined sidebar 3, a bottom beam 4, a sidebar 5, and reinforcement supports 6 which are parallel and interconnected with connecting struts 7 (in Fig. 1 only one frame, with the other behind it). On the opposite faces of the inclined side beams 3 of the frame there is a longitudinal guide 8 for the two side edges 15 of a wedge 10, and there are two tooth rods 11 which cooperate with two ratchets 12 which are hinged to the wedge 10 and of springs. 13 is pressed against the rack so that the wedge can only be lifted along the inclined sides 3 but cannot slide back. The wedge is pushed upwardly guided by the inclined side-beams 3 by means of a pulling mechanism not shown in the drawing, which is mounted on the same stand or on an underwater vessel which acts on a cable 14 fixed by one end of the wedge is guided around a freely rotatable cable disc 15 which is mounted on a shaft 16 at the upper end of the inclined side beams 3 of the frame, which is then guided around another freely rotatable cable disc 17, which is mounted on a shaft 18 at the lower ends of the inclined sidebars 3. FIG. 1 also shows a ring 30 19 which is attached to the other end of the cable 14 for facilitating the connection to the towing mechanism of the underwater vessel. Finally, beneath the bottom beam 4 of the triangular frame is a wide base plate 20 having edges 21, so that it may be easier for the submarine to pull the frame under the pipeline to be supported.

Claims (3)

144665 Kilen kan også være indrettet til at styres glidende langs den med tandstænger udstyrede skrå side af det trekantede stativ ved hjælp af en indstillelig fjedermekanisme eller en hydraulisk og pneumatisk meka-5 nisme i stedet for ved hjælp af kabel og trissesystemet. Installationen og driften af et sådant apparat, hvis restvægt i vandet er bragt nær nul ved hjælp af flydere, der kan bringes op igen eller fyldes med vand, og som ikke er vist på tegningen, forstås let.The wedge may also be arranged to be slidably guided along the inclined side of the triangular rack by the rack by means of an adjustable spring mechanism or a hydraulic and pneumatic mechanism instead of by the cable and pulley system. The installation and operation of such an apparatus whose residual weight in the water has been brought near zero by means of floatable or water-filled floaters, and not shown in the drawings, is readily understood. 10 Når først et undervandsfartøj har fastlagt led ningsforløbet af rørledningen udlagt over havbundsforsænkningen, gennemføres der kalkulation af spændinger, så at placeringspunktet for understøtningsapparatet kan bestemmes, og størrelsen af det opadrettede tryk, der 15 skal påføres rørledningen for opnåelse af disse spændinger under hensyntagen til opnåelse af det optimale ledningsforløb. Det trekantede stativ sænkes derefter fra et hjælpefartøj ned på havbunden i nærheden af den udlagte rørledning og skubbes af undervandsfartøjet mod 20 rørledningen, indtil de skrå sidebjælker 3 af stativet kommer i berøring med rørledningen. På dette stadium aktiveres trækmekanismen, som gennem kablet og kabelskive-systemet påfører kilen et opadrettet tryk, der svarer til de beregnede spændinger.10 Once a submarine vessel has determined the conduction course of the pipeline laid over the seabed depression, calculation of stresses is performed so that the location of the support device can be determined and the magnitude of the upward pressure to be applied to the pipeline to achieve these stresses, taking into account the attainment. of the optimal wiring. The triangular frame is then lowered from an auxiliary vessel onto the seabed near the laid pipeline and pushed by the underwater vessel toward the pipeline until the inclined sidebars 3 of the frame come into contact with the pipeline. At this stage, the pulling mechanism is activated which, through the cable and the wafer system, applies an upward pressure corresponding to the calculated stresses through the wedge. 25 Hvis imidlertid havbunden giver efter under vægten fra rørledningen, som fyldes med vand af hensyn til afprøvningen, hvilket bevirker, at rørledningen hæves fra understøtningsapparatet efter prøven, kan der let rettes på dette forhold ved, at kilen løftes yderligere op. 30 Apparat til understøtning af en rørledning (2) på bunden af et vandområde til opnåelse af en forud valgt 35 geometrisk form af rørledningen, der er udlagt over enHowever, if the seabed yields below the weight of the pipeline, which is filled with water for the purpose of the test, which causes the pipeline to be raised from the support apparatus after the test, this ratio can easily be corrected by further lifting the wedge. Apparatus for supporting a pipeline (2) at the bottom of a water area to obtain a preselected geometric shape of the pipeline laid over a
DK15878A 1977-01-18 1978-01-12 APPARATUS FOR SUPPORTING A PIPELINE ON THE BOTTOM OF A WATER AREA DK144665C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK376981A DK145434C (en) 1977-01-18 1981-08-25 APPARATUS FOR SUPPORTING A PIPELINE ON THE BOTTOM OF A WATER AREA

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1938677 1977-01-18
IT1938677A IT1078683B (en) 1977-01-18 1977-01-18 ADJUSTABLE EQUIPMENT TO SUPPORT AND ASSUME A PREDETERMINED GEOMETRIC CONFIGURATION TO A PIPE INSTALLED IN HIGH BOTTOMS CORRESPONDING TO THE ACCIDENTALITY OF THE SEA BOTTOM

Publications (3)

Publication Number Publication Date
DK15878A DK15878A (en) 1978-07-19
DK144665B true DK144665B (en) 1982-05-03
DK144665C DK144665C (en) 1982-10-04

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Application Number Title Priority Date Filing Date
DK15878A DK144665C (en) 1977-01-18 1978-01-12 APPARATUS FOR SUPPORTING A PIPELINE ON THE BOTTOM OF A WATER AREA

Country Status (13)

Country Link
JP (1) JPS5390017A (en)
AU (1) AU511844B2 (en)
BE (1) BE863039A (en)
BR (1) BR7800345A (en)
CA (1) CA1086288A (en)
DE (1) DE2802111C3 (en)
DK (1) DK144665C (en)
FR (1) FR2377567A1 (en)
GB (1) GB1564493A (en)
IE (1) IE46029B1 (en)
IT (1) IT1078683B (en)
LU (1) LU78875A1 (en)
NL (1) NL173093C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1099960B (en) * 1978-10-17 1985-09-28 Snam Progetti ADJUSTABLE EQUIPMENT FOR THE SUPPORT OF A PIPE INSTALLED IN HIGH BOTTOMS IN CORRESPONDENCE OF A SEA BOTTOM
IT1160284B (en) * 1978-12-04 1987-03-11 Saipem Spa EQUIPMENT FOR THE SUPPORT OF SUSPENDED PIPES ON CORRUGATED SEA BOTTOMS EVEN AT LARGE DEPTHS
FR2451531A1 (en) * 1979-03-15 1980-10-10 Doris Dev Richesse Sous Marine Submersible floating support for submarine pipeline - may use lattice girders spanning cylindrical floats of adjustable buoyancy
IT1121450B (en) * 1979-06-20 1986-04-02 Saipem Spa PERFECTED METHOD FOR LAYING AN UNDERWATER CONDUCT IN THE OVERHEAD OF OTHER ALREADY CONDUCT AND RELATED DEVICES
IT1209307B (en) * 1980-02-19 1989-07-16 Rognoni Antonio ADJUSTABLE SUPPORT FOR UNDERWATER PIPES DISTANT FROM THE BOTTOM.
IT1209306B (en) * 1980-02-19 1989-07-16 Rognoni Antonio ADJUSTABLE SUPPORT FOR SUBMARINE PIPES AT SMALL DISTANCE FROM THE BOTTOM.
GB2214599A (en) * 1988-01-13 1989-09-06 Ind Acoustics Company Limited Duct mounting
ITMI20141880A1 (en) * 2014-11-03 2016-05-03 Saipem Spa SUPPORT FOR UNDERWATER PIPE, SYSTEM AND METHOD FOR ARRANGING THIS SUPPORT
CN105270734A (en) * 2015-09-15 2016-01-27 天津正安无缝钢管有限公司 Steel pipe supporting device
CN106931239B (en) * 2017-03-29 2018-09-11 广东国利先进复合材料研发有限公司 A kind of bottom pipeline suspended span method for supporting and device
CN117345952B (en) * 2023-12-06 2024-02-13 卡耐夫集团(山西)管道系统有限公司 Supporting structure of municipal water supply pipeline

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405819A (en) * 1943-11-09 1946-08-13 Herman U Dustman Support
US3288406A (en) * 1965-11-22 1966-11-29 George R Degen Adjustable pipe support
GB1274886A (en) * 1968-07-11 1972-05-17 Shell Int Research Apparatus for remotely joining underwater pipelines
FR2029207A5 (en) * 1969-01-17 1970-10-16 Petroles Cie Francaise
US3741320A (en) * 1971-07-12 1973-06-26 Atlas Copco Ab Subsea drilling assembly

Also Published As

Publication number Publication date
DE2802111B2 (en) 1979-10-18
BE863039A (en) 1978-07-18
DE2802111A1 (en) 1978-07-20
IE46029B1 (en) 1983-01-26
DK15878A (en) 1978-07-19
AU3232078A (en) 1979-07-19
FR2377567A1 (en) 1978-08-11
IE780114L (en) 1978-07-18
BR7800345A (en) 1978-09-05
AU511844B2 (en) 1980-09-11
GB1564493A (en) 1980-04-10
JPS5390017A (en) 1978-08-08
IT1078683B (en) 1985-05-08
DE2802111C3 (en) 1980-06-26
FR2377567B1 (en) 1982-04-02
NL7800626A (en) 1978-07-20
CA1086288A (en) 1980-09-23
DK144665C (en) 1982-10-04
LU78875A1 (en) 1978-06-09
NL173093B (en) 1983-07-01
NL173093C (en) 1983-12-01

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