US4303352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the building and putting in place of a sea platform with a gravity resting base, and means for implementing such a method
Assignee: Generale Pour Devel Operationnels Richesses Sous-Marines
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Filing: 1979-06-25
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Granted: 1981-12-01
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Expires: 1999-06-25
Abstract
Abstract The invention relates to a method for the building and putting in place of a sea platform in using buoyancy chambers. The buoyancy chambers are temporarily attached to the raft and capable of being ballasted for allowing the control of their buoyancy during the building of the structure and their recovery. Simultaneously with the building of the tower and walls, the chambers are progressively built by assembling of portions of bodies mounted on a bottom element resting on a chamber receptacle.
Inventors
- 👤 Henri A. Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:30
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/025; E02B2017/0056; E02B2017/0065; E02B2017/0069; E02B2017/0073; E02B2017/0086
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A method for the building and putting in place of a sea platform with a gravity resting base comprising the following main steps: (a) building in dry dock of a foundation raft comprising a portion of anti-underwashing walls, circular and radial strengthening walls, buoyancy chamber receptacles and a base forming tower lower portion and water tightening the anti-underwashing walls; (b) launching the raft; (c) simultaneously building the walls, a tower and buoyancy chambers, said chambers being built progressively by assembling portions of bodies mounted on a bottom element resting on the chamber receptacle, said assembled portions having a buoyancy adapted to the progressive assembly; (d) ballasting the chamber receptacles during building of the tower and buoyancy chambers; (e) closing the upper ends of the buoyancy chambers; (f) completion of the tower, simultaneously with progressive ballasting thereof; (g) immersion of the platform by means of ballast; (h) putting in place of a bridge, and adjusting the draught; (i) towage to a selected location; (j) immersion of the platform by means of ballast; (k) putting in place of a module and ballasting the tower lower portion with solid ballast; and (l) disconnecting the buoyancy chamber and ballasting the chamber receptacles with solid ballast.
Claim 2
Independent Claim
201 words
A method for the building and putting in place of a sea platform with a gravity resting base comprising the following main steps: (a) building in dry dock of a foundation raft comprising a portion of anti-underwashing walls, circular and radial strengthening walls, buoyancy chamber receptacles and a base forming tower lower portion and water tightening the anti-underwashing walls; (b) launching the raft; (c) simultaneously building the walls, a tower and buoyancy chambers, said chambers being built progressively by assembling portions of bodies mounted on a bottom element resting on the chamber receptacle, said assembled portions having a buoyancy adapted to the progressive assembly; (d) ballasting the chamber receptacles during building of the tower and buoyancy chambers; (e) closing the upper ends of the buoyancy chambers; (f) completion of the tower, simultaneously with progressive ballasting thereof; (g) immersion of the platform by means of ballast; (h) putting in place of a bridge, and adjusting the draught; (i) towage to a selected location; (j) immersion of the platform by means of ballast; (k) putting in place of a module and ballasting the tower lower portion with solid ballast; and (l) disconnecting the buoyancy chamber and ballasting the chamber receptacles with solid ballast.
Claim 3
Independent Claim
200 words
A method for the building and putting in place of a sea platform with a gravity resting base comprising the following main steps: (a) building in dry dock a foundation raft comprising a portion of anti-underwashing walls, circular and radial strengthening walls, buoyancy chamber receptacles and a base forming tower lower portion and water tightening the anti-underwashing walls; (b) launching the raft; (c) simultaneously building the walls, a tower and buoyancy chambers, said chambers being built progressively by assembling portions of bodies mounted on a bottom element resting on the chamber receptacle, said assembled portions having a buoyancy adapted to the progressive assembly; (d) ballasting the chamber receptacles during building of the tower and buoyancy chambers; (e) closing the upper ends of the buoyancy chambers; (f) completion of the tower, simultaneously with progressive ballasting thereof; (g) immersion of the platform by means of ballast; (h) putting in place of a bridge and adjusting the draught; (i) towage to the selected location; (j) immersion of the platform by means of ballast; (k) disconnecting the buoyancy chambers and ballasting the chamber receptacles with solid ballast; and (l) putting in place of a module and ballasting the tower lower portion with solid ballast.
Claim 4
Independent Claim
200 words
A method for the building and putting in place of a sea platform with a gravity resting base comprising the following main steps: (a) building in dry dock a foundation raft comprising a portion of anti-underwashing walls, circular and radial strengthening walls, buoyancy chamber receptacles and a base forming tower lower portion and water tightening the anti-underwashing walls; (b) launching the raft; (c) simultaneously building the walls, a tower and buoyancy chambers, said chambers being built progressively by assembling portions of bodies mounted on a bottom element resting on the chamber receptacle, said assembled portions having a buoyancy adapted to the progressive assembly; (d) ballasting the chamber receptacles during building of the tower and buoyancy chambers; (e) closing the upper ends of the buoyancy chambers; (f) completion of the tower, simultaneously with progressive ballasting thereof; (g) immersion of the platform by means of ballast; (h) putting in place of a bridge and adjusting the draught; (i) towage to the selected location; (j) immersion of the platform by means of ballast; (k) disconnecting the buoyancy chambers and ballasting the chamber receptacles with solid ballast; and (l) putting in place of a module and ballasting the tower lower portion with solid ballast.
Claim 5
Dependent Claim
124 words
A gravity platform comprising: a foundation raft having structural elements and adapted to reset on a sea floor; an anti-underwashing wall formed on the foundation raft; chamber receptacles forming a portion of the structural elements of the foundation raft, said receptacles being distributed according to a predetermined configuration; a central tower having a lower part, said tower being joined to the foundation raft and chamber receptacles by means of diaphragm walls; buoyancy chambers removably mounted on the chamber receptacles, the buoyancy chambers being removable from the raft and recoverable, leaving the raft disposed on the sea floor, said buoyancy chambers formed of prefabricated elements adapted to be connected together; and means for connecting the buoyancy chambers to the chamber receptacles in a watertight manner.
Claim 6
Dependent Claim
124 words
A gravity platform comprising: a foundation raft having structural elements and adapted to reset on a sea floor; an anti-underwashing wall formed on the foundation raft; chamber receptacles forming a portion of the structural elements of the foundation raft, said receptacles being distributed according to a predetermined configuration; a central tower having a lower part, said tower being joined to the foundation raft and chamber receptacles by means of diaphragm walls; buoyancy chambers removably mounted on the chamber receptacles, the buoyancy chambers being removable from the raft and recoverable, leaving the raft disposed on the sea floor, said buoyancy chambers formed of prefabricated elements adapted to be connected together; and means for connecting the buoyancy chambers to the chamber receptacles in a watertight manner.
Claim 7
Dependent Claim
31 words
A gravity platform according to claim 3, wherein the buoyancy chambers comprise a bottom which can be temporarily adapted to the receptacle in a watertight manner, a body and a top.
Claim 8
Dependent Claim
21 words
A gravity platform according to claim 4, wherein the chamber body is formed of hollow elements connected in a watertight manner.
Claim 9
Dependent Claim
27 words
A gravity platform according to claim 4, wherein the chamber body is formed at least in part by watertight caissons connected to one another by mechanical means.
Claim 10
Dependent Claim
32 words
A gravity platform according to claim 3, wherein the elements forming buoyancy chambers are made at least partially with a material having a specific gravity lower than that of the surrounding medium.
Claim 11
Dependent Claim
32 words
A gravity platform according to claim 3, wherein the elements forming buoyancy chambers are filled at least partially with a material having a specific gravity lower than that of the surrounding medium.
Claim 12
Dependent Claim
30 words
A gravity platform according to claim 3, wherein said buoyancy chambers are filled with a fluid under pressure, said fluid having a density lower than that of the surrounding medium.
Claim 13
Dependent Claim
19 words
A gravity platform according to claim 3, including means fitted to said buoyancy chambers for admitting and emptying ballast.
References Cited (Backward Citations)
US2574140A
Cited
US3064437A
Cited
FR2172497A5
Cited
FR2179433A5
Cited
GB1440229A
Cited
US3965688A
Cited
FR2261925A1
Cited
US4087984A
Cited
NL7611325A
Cited
FR2343863B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |