NO132205B - - Google Patents
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- Publication number
- NO132205B NO132205B NO2805/71A NO280571A NO132205B NO 132205 B NO132205 B NO 132205B NO 2805/71 A NO2805/71 A NO 2805/71A NO 280571 A NO280571 A NO 280571A NO 132205 B NO132205 B NO 132205B
- Authority
- NO
- Norway
- Prior art keywords
- floats
- float
- filled
- wire
- length
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007654 immersion Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 208000034699 Vitreous floaters Diseases 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- 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
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
- Farming Of Fish And Shellfish (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Description
Oppfinnelsen vedrorer en anordning for nedsenking av storre konstruksjoner som lagertanker e.l. til anlegg på havbunnen e.l., omfattende minst to grupper flottorer hver på minst to flottorer med vannballastkamre som valgfritt kan fylles resp. tommes, og lengderegulerbare foirbindelseswirer e.l. mellom flottorene og konstruksjonen. Oppfinnelsen kan f.eks. med fordel anvendes for nedsenking av store, meget tunge, undersjoiske lagertanker for hydrokarboner. The invention relates to a device for submerging larger structures such as storage tanks etc. for facilities on the seabed etc., comprising at least two groups of floats each of at least two floats with water ballast chambers that can optionally be filled resp. inches, and length-adjustable connecting wires etc. between the floats and the structure. The invention can e.g. advantageously used for submerging large, very heavy, subsea storage tanks for hydrocarbons.
Det problem som skal loses består i, efter å ha plasert en slik konstruksjon på det sted hvor den skal senkes ned, å fore den langsomt ned på havbunnen idet stabiliteten sikres kontinuerlig. Videre må sikkerheten ved senkingen være absolutt. The problem to be solved consists in, after having placed such a construction in the place where it is to be lowered, to lower it slowly to the seabed while stability is continuously ensured. Furthermore, the safety of lowering must be absolute.
De" hittil kjente fremgangsmåter som for eksempel de som er be-skrevet i fransk patent 1.547.703, bruker kretser av flottorer festet til konstruksjonen, idet flottorene suksessivt fylles med vann for å tillate senking av konstruksjonen på havbunnen. For at dette system skal være stabilt, kreves det flere kretser av flottorer anbragt rundt konstruksjonen og fortrinnsvis to grupper av slike kretser, slik at den ene gruppe befinner seg positivt flytende mens flottorene i den annen gruppe er under fylling. Dette system krever et stort antall flottorer og folgelig stor investering. Videre krever iverksettelsen av dette system et fritt område, hvis radius er minst lik dybden på senkestedet. Endelig er det, i tilfelle feilmanover, meget vanskelig å stoppe senkingen og utfore de omvendte operasjoner. The previously known methods, such as those described in French patent 1,547,703, use circuits of floats attached to the structure, the floats being successively filled with water to allow the structure to be lowered to the seabed. For this system to be stable, it requires several circuits of floats arranged around the structure and preferably two groups of such circuits, so that one group is positively floating while the floats in the other group are filling in. This system requires a large number of floats and consequently a large investment. Furthermore, the implementation of this system requires a free area, the radius of which is at least equal to the depth of the lowering site.Finally, in the event of a wrong maneuver, it is very difficult to stop the lowering and perform the reverse operations.
Anordningen ifolge oppfinnelsen for nedsenking av slike svære og tunge konstruksjoner som undersjøiske lagertanker for olje e.l. kjennetegnes ved at hver av flottorene er langstrakte og omfatter ett eller flere sentrale ballastkamre med stort volum og i den ene ende et mindre bal1astkammer, hvori inngår lagerrom for wire e.l. samt i den annen ende et luftfylt kammer, hvis volum er slik at det gir flottoren positiv oppdrift når de to forstnevnte kamre sr vannfylt, i hvilket luftfylte kammer fortrinnsvis inngår i og for seg kjente midler som f.eks. en vinsj til justering av den frie lengde av wiren samt sperreelement for fastholding av denne i onsket utmatningslengde. The device according to the invention for submerging such large and heavy constructions as underwater storage tanks for oil etc. is characterized by the fact that each of the floats is elongated and includes one or more central ballast chambers with a large volume and at one end a smaller ballast chamber, which includes a storage room for wire etc. and at the other end an air-filled chamber, the volume of which is such that it gives the float positive buoyancy when the two first-mentioned chambers are filled with water, in which air-filled chamber is preferably included in known means such as e.g. a winch for adjusting the free length of the wire as well as a locking element for holding it in the desired output length.
Oppfinnelsen vil bedre forstås av den efterfSigende beskrivelse The invention will be better understood from the following description
i forbindelse med tegningene, hvor: in connection with the drawings, where:
fig. 1 viser et snitt gjennom én av de flottorer som anvendes ifolge oppfinnelsen, fig. 1 shows a section through one of the floats used according to the invention,
fig. 2 viser befestigelse av to slike flottorer til konstruksjonen, som her utgjores av en stor lagertank, fig. 2 shows the attachment of two such floaters to the construction, which is here made up of a large storage tank,
fig. 3 viser begynnelsen av nedsenkingen av tanken, fig. 3 shows the beginning of the immersion of the tank,
fig. 4 og 5 viser to mellomfaser i nedsenkingen, og fig. 4 and 5 show two intermediate phases in the immersion, and
fig. 6 viser sluttfasen av nedsenkingen. fig. 6 shows the final phase of the immersion.
1 fig. 1 er vist en flottor beregnet på å tjene til nedsenking av storre konstruksjoner, i nærværende tilfelle en tank .16. 1 fig. 1 shows a float intended to be used for submerging large structures, in the present case a tank .16.
Flottoren har avlang form og omfatter tre avdelinger. Den midtre avdeling 1 har stort volum og strekker seg omtrent over 3/4 av flottorens lengde. I nedre del er en avdeling 2 uavheng-ig av avdeling 1 og omfattende et lagerrom for wire, kjetting e.l. 4, i hvilket befinner seg en viss lengde reservewire. I ovre del av flottoren er det over avdelingen 1 en avdeling 3 med slikt volum at den under fylling av avdelingene 1 og 2 med vann sikrer at flottoren flyter. I avdelingen 3 er anbragt en vinsj 6 med hydraulisk bremse, over hvilken er fort en wire 5 som kommer fra rommet 4. The float has an oblong shape and comprises three compartments. The middle compartment 1 has a large volume and extends approximately over 3/4 of the float's length. In the lower part, a department 2 is independent of department 1 and includes a storage room for wire, chain etc. 4, in which there is a certain length of spare wire. In the upper part of the float, above compartment 1, there is a compartment 3 with such a volume that, while filling compartments 1 and 2 with water, it ensures that the float floats. In compartment 3, a winch 6 with hydraulic brake is placed, above which is fast a wire 5 coming from room 4.
Et sperreelement 7 er anordnet i den ovre del av avdelingen 3. Wiren er fort gjennom dette sperreelement og ned gjennom en vertikal kanal som nedentil forer ut av flottoren, idet wiren 5 i arbeidsstilling er festet til den konstruksjon som skal senkes ned. A locking element 7 is arranged in the upper part of the compartment 3. The wire is fast through this locking element and down through a vertical channel that leads out of the float below, the wire 5 being in working position attached to the structure to be lowered.
Med 9 betegnes en trykklufttilforsel som ved en rorledning 10 kan bevirke tomming av avdelingen 2, og gjennom en ledning 11 tomming av hovedavdelingen 1. To ventiler 12 og 13 tillater innlop eller utlop av vann i avdelingene 1 og 2. Disse ventiler manovreres ovenfra ved hjelp av styremidler 14 og 15. 9 denotes a compressed air supply which, via a rudder line 10, can cause the emptying of compartment 2, and through a line 11 the emptying of the main compartment 1. Two valves 12 and 13 allow the inlet or outlet of water in compartments 1 and 2. These valves are operated from above using of control measures 14 and 15.
Fig. 2 viser befestigelsen av to flottorer 19 og 22 til tanken 16. Denne anbringes i flytende tilstand på senkestedet ved hjelp av taubåter. På senkestedet forsynes tanken forst med hjelpeflottorer 17 i tilstrekkelig antall. Når disse er festet, gir man tanken en noe negativ flyteevne, slik at dens vekt bæres av hjelpeflottorene 17. Derpå fester man i de på forhånd be-stemte festepunkter 25 wiren fra flottorene 19, 22. Avdeling 2 vannfylles, hvorved flottorene inntar vertikal stilling, og ved hjelp av den nevnte vinsj 6 gis wiren 23 et ikke ubetydelig strekk. Fig. 2 shows the attachment of two floats 19 and 22 to the tank 16. This is placed in a floating state at the lowering site with the help of tugboats. At the lowering point, the tank is first supplied with auxiliary floats 17 in sufficient numbers. When these are attached, the tank is given a somewhat negative buoyancy, so that its weight is carried by the auxiliary floats 17. The wire from the floats 19, 22 is then attached to the predetermined attachment points 25. Compartment 2 is filled with water, whereby the floats assume a vertical position , and with the help of the mentioned winch 6, the wire 23 is given a not inconsiderable stretch.
Tanken 16 forsynes også med kabler 20 og 21 forbundet med opp-ankrede flytekasser for ved et visst sideveis strekk å sentrere tanken på senkestedet og unngå sideforflytninger. The tank 16 is also supplied with cables 20 and 21 connected to anchored float boxes in order to center the tank at the lowering point at a certain lateral stretch and avoid lateral movements.
Fig. 3 viser en mellomfase i senkingen. Flottorene 17 er fjer-net, og de to flottorer 19 og 22 er i vertikal stilling. Hovedavdelingen 1 i flottoren 19 fylles med vann likesom avdelingen 2 i flottoren 22. På denne måte synker flottoren 19, og tillater tanken 16 å senkes en viss dybde. Flottorens 22 oppdrift bærer tanken. På tegningene er bare vist to flottorer, men i praksis bruker man to, tre eller fire rekker med to flottorer likt fordelt omkring tanken eller konstruksjonen. Fig. 3 shows an intermediate phase in the lowering. The floats 17 are removed, and the two floats 19 and 22 are in a vertical position. The main compartment 1 in the float 19 is filled with water, as is compartment 2 in the float 22. In this way, the float 19 sinks, and allows the tank 16 to be lowered to a certain depth. The buoyancy of the float 22 carries the tank. In the drawings, only two floats are shown, but in practice two, three or four rows of two floats are used, equally distributed around the tank or structure.
Sperreelementet 7 for wiren 5 kobles så ut, hvorved wiren kan mates ut med en kjent lengde, hvilket bevirker reduksjon av det strekk som den frie wirelengde 23 utover på tanken 16. The locking element 7 for the wire 5 is then disconnected, whereby the wire can be fed out with a known length, which results in a reduction of the stretch that the free wire length 23 outwards on the tank 16.
Samtidig tommes, med rimelig hastighet, avdelingen 1 i flottoren 19. Ved disse to operasjoner ISftes flottoren 19, mens flottoren 22, hvis hovedavdeling er tom, synker. At the same time, at a reasonable speed, compartment 1 in the float 19 is emptied. During these two operations, the float 19 rises, while the float 22, whose main compartment is empty, sinks.
Når likevektstilling er nådd, fyller man hovedavdelingen i flottoren 22 med vann, hvorved flottoren 22 synker og tillater senking av tanken, mens flottoren 19, som også synker, utover et okende strekk på tanken og således bremser nedsenkingen. When the equilibrium position is reached, the main compartment in the float 22 is filled with water, whereby the float 22 sinks and allows the tank to be lowered, while the float 19, which also sinks, over an increasing distance on the tank and thus slows down the sinking.
Man har da alltid sikkerhet, idet man minst har en rekke flottorer som er klar til å bremse nedsenkingen i tilfelle tanken e.l. skulle til å synke på grunn av en feilmanSver. You always have safety, as you at least have a number of floats that are ready to slow down the immersion in the event of the tank etc. was going to sink because of a faulty manSver.
Fig. 4 viser den fase i hvilken flottoren 19, hvis hovedavdeling nu er fylt med vann, er ved slutten av nedadbevegelse, mens flottoren 22, hvis hovedavdeling er tom, bremser tankens nedsenking. I dette oyeblikk er wiren 24 under strekk likesom v/iren 23. Den f Sigende operasjon består i å mate ut en viss lengoe av wire 23, alt mens hovedavdelingen i flottSren 19 tSm-mes ved hjelp av trykkluft. Flottoren 19 stiger opp, mens flottoren 22 synker. Fig. 4 shows the phase in which the float 19, whose main compartment is now filled with water, is at the end of its downward movement, while the float 22, whose main compartment is empty, slows down the tank's immersion. At this moment, the wire 24 is under tension as well as the wire 23. The operation described consists of feeding out a certain length of wire 23, all while the main section of the float 19 is compressed by means of compressed air. The float 19 rises, while the float 22 sinks.
Når så hovedavdelingen i flottSren 19 er tomt, sperres atter wiren 23, og hovedavdelingen i flottoren 22 fylles, hvorved flottoren synker langsomt, hvilket samtidig medforer at flottoren 19, som er tom, også synker. Denne operasjon er vist i fig. When the main compartment in the float Sren 19 is empty, the wire 23 is blocked again, and the main compartment in the float 22 is filled, whereby the float sinks slowly, which at the same time means that the float 19, which is empty, also sinks. This operation is shown in fig.
5 i det oyeblikk da flottorene er tomt. 5 at the moment when the floats are empty.
Fig. 6 viser den folgende fase i hvilken hovedavdelingen i flottoren 22 er fylt, mens hovedavdelingen i flottoren 19 er tom. På denne måte oppnår man at konstruksjonen senkes trinnvis litt efter litt, idet der i hvert oyeblikk er tilstede en betydelig sikkerhet, slik at man unngår ethvert rykk i manovren. Denne sikkerhet er automatisk. Fig. 6 shows the following phase in which the main compartment in the float 22 is filled, while the main compartment in the float 19 is empty. In this way, it is achieved that the structure is lowered step by step, little by little, as there is considerable safety at every moment, so that any jolt in the maneuver is avoided. This security is automatic.
Man sikrer samtidig strekket på kablene 20 og 21, idet de nevnte kasser nærmer seg midten av senkeområdet, og idet kablene 20 At the same time, the tension on the cables 20 and 21 is ensured, as the aforementioned boxes approach the center of the lowering area, and as the cables 20
og 21 holder konstant lengde hvis man på forhånd har regulert avstanden mellom kassene riktig. and 21 keep a constant length if the distance between the boxes has been adjusted correctly in advance.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7027350A FR2098691A5 (en) | 1970-07-24 | 1970-07-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO132205B true NO132205B (en) | 1975-06-23 |
NO132205C NO132205C (en) | 1975-10-01 |
Family
ID=9059181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO2805/71A NO132205C (en) | 1970-07-24 | 1971-07-22 |
Country Status (8)
Country | Link |
---|---|
US (1) | US3756179A (en) |
JP (1) | JPS5512496B1 (en) |
DE (1) | DE2136967A1 (en) |
FR (1) | FR2098691A5 (en) |
GB (1) | GB1334761A (en) |
NL (1) | NL7110162A (en) |
NO (1) | NO132205C (en) |
OA (1) | OA03763A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4015554A (en) * | 1975-05-02 | 1977-04-05 | Lin Offshore Engineering, Inc. | Construction and launch barge and method of producing and installing offshore structures |
GB2159481B (en) * | 1984-06-01 | 1988-09-21 | Univ London | Method of lifting an object from a surface exterior to a vessel |
NO326901B1 (en) * | 2007-05-25 | 2009-03-16 | Aker Marine Contractors As | Method and a floating buoyancy body for moving objects on the seabed |
GB2464714B (en) * | 2008-10-24 | 2010-09-08 | Subsea Deployment Systems Ltd | Method and apparatus for subsea installations |
FR3000720B1 (en) * | 2013-01-08 | 2015-01-16 | Technip France | SUBMERSIBLE FLOATING BARGE |
RU2659176C1 (en) * | 2017-07-17 | 2018-06-28 | Общество С Ограниченной Ответственностью "Газпром Трансгаз Краснодар" | Method for positioning underwater equipment |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1840324A (en) * | 1929-09-17 | 1932-01-12 | Carl J Lindquist | Airship sea beacon and service station |
US2118466A (en) * | 1936-01-20 | 1938-05-24 | Jennings Edward Henry | Submarine |
US2371404A (en) * | 1941-06-20 | 1945-03-13 | Mumford Ivor Ross James | Submersible container |
US2783027A (en) * | 1953-04-24 | 1957-02-26 | Shell Dev | Method and apparatus for submerged well drilling |
US2908141A (en) * | 1954-07-23 | 1959-10-13 | Raymond Int Inc | Marine platforms |
US3256537A (en) * | 1963-01-09 | 1966-06-21 | Daniel W Clark | Mobile marine platform |
FR1361334A (en) * | 1963-01-16 | 1964-05-22 | Electricite De France | Pressure vessel and its applications |
US3386407A (en) * | 1966-08-02 | 1968-06-04 | Bossert Mfg Corp | Anchors and anchoring mechanisms |
US3559413A (en) * | 1968-02-07 | 1971-02-02 | Pan American Petroleum Corp | Adjustable stinger for use in laying pipeline in water covered areas |
DE1808557A1 (en) * | 1968-11-13 | 1970-06-04 | Babcock & Wilcox Ag | Underwater house |
-
1970
- 1970-07-24 FR FR7027350A patent/FR2098691A5/fr not_active Expired
-
1971
- 1971-07-22 NO NO2805/71A patent/NO132205C/no unknown
- 1971-07-22 GB GB3437471A patent/GB1334761A/en not_active Expired
- 1971-07-23 DE DE19712136967 patent/DE2136967A1/en active Pending
- 1971-07-23 US US00165526A patent/US3756179A/en not_active Expired - Lifetime
- 1971-07-23 JP JP5515871A patent/JPS5512496B1/ja active Pending
- 1971-07-23 OA OA54308A patent/OA03763A/en unknown
- 1971-07-23 NL NL7110162A patent/NL7110162A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
OA03763A (en) | 1971-12-24 |
JPS5512496B1 (en) | 1980-04-02 |
NO132205C (en) | 1975-10-01 |
GB1334761A (en) | 1973-10-24 |
NL7110162A (en) | 1972-01-26 |
FR2098691A5 (en) | 1972-03-10 |
DE2136967A1 (en) | 1972-01-27 |
US3756179A (en) | 1973-09-04 |
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