US3857247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offshore tower erection technique
Assignee: Raymond International Inc
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Filing: 1974-02-06
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Granted: 1974-12-31
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Expires: 1994-02-06
Abstract
Abstract An offshore tower is erected by positioning an open framework template on a sea bed; jacking a construction barge up onto the template out of the water, installing anchor piles securing the legs of the template to the sea bed by operations carried out from the raised barge, lowering the barge and thereafter raising a large platform up onto the template.
Inventors
- 👤 L Phares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:49
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A method of erecting an offshore tower comprIsing the steps of positioning a template on a sea bed with the upper end of the template extending above the sea surface, floating a barge out to the template and positioning the barge between the legs of the template, jacking the barge up on the legs of the template and out from the water, driving anchor piles from the barge down through the bottom of the template and into the sea bed to anchor the template in place on the sea bed, thereafter lowering said barge to a floating position, floating said barge away from said template, floating a permanent tower platform to the anchored in place template and jacking the platform up on the template to a raised position above the surface of the sea.
Claim 2
Independent Claim
134 words
A method of erecting an offshore tower comprIsing the steps of positioning a template on a sea bed with the upper end of the template extending above the sea surface, floating a barge out to the template and positioning the barge between the legs of the template, jacking the barge up on the legs of the template and out from the water, driving anchor piles from the barge down through the bottom of the template and into the sea bed to anchor the template in place on the sea bed, thereafter lowering said barge to a floating position, floating said barge away from said template, floating a permanent tower platform to the anchored in place template and jacking the platform up on the template to a raised position above the surface of the sea.
Claim 3
Independent Claim
100 words
A method of erecting an offshore tower comprising the steps of positioning an elongated open framework supporting structure in upright position at a predetermined location on the sea bed with the upper end of said structure extending up beyond the level of the sea water, mooring a floating platform in between the legs of said structure and then jacking said platform up onto said structure and out of the water, operating from the thus raised platform to anchor the bottom of said structure to the sea bed, thereafter lowering the platform and replacing same by a large permanent raised platform.
Claim 4
Independent Claim
100 words
A method of erecting an offshore tower comprising the steps of positioning an elongated open framework supporting structure in upright position at a predetermined location on the sea bed with the upper end of said structure extending up beyond the level of the sea water, mooring a floating platform in between the legs of said structure and then jacking said platform up onto said structure and out of the water, operating from the thus raised platform to anchor the bottom of said structure to the sea bed, thereafter lowering the platform and replacing same by a large permanent raised platform.
Claim 5
Dependent Claim
31 words
A method according to claim 2 wherein the barge is jacked up on jacking tubes secured to the upper ends of the template and extending down alongside legs of the template.
Claim 6
Dependent Claim
26 words
A method according to claim 2 wherein the template includes a plurality of legs and wherein operations anchoring several of said legs are carried out simultaneously.
Claim 7
Independent Claim
130 words
A method of erecting an offshore tower comprising the steps of positioning a template on a sea bed with the upper end of the template extending above the sea surface, floating a barge out to the template and positioning the barge between the legs of the template, jacking the barge up on the legs of the template and out from the water, driving anchor piles from the barge down through the bottom of the template and into the sea bed to anchor the template in place on the sea bed, thereafter lowering said barge to a floating position, floating said barge away from said template, floating a plurality of separate platform modules out to the anchored template and lifting the modules onto the template and assembling them in place thereon.
Claim 8
Independent Claim
130 words
A method of erecting an offshore tower comprising the steps of positioning a template on a sea bed with the upper end of the template extending above the sea surface, floating a barge out to the template and positioning the barge between the legs of the template, jacking the barge up on the legs of the template and out from the water, driving anchor piles from the barge down through the bottom of the template and into the sea bed to anchor the template in place on the sea bed, thereafter lowering said barge to a floating position, floating said barge away from said template, floating a plurality of separate platform modules out to the anchored template and lifting the modules onto the template and assembling them in place thereon.
Claim 9
Dependent Claim
29 words
A method of erecting an offshore tower according to claim 5 wherein said modules are raised onto said template by means of a floating derrick moored alongside said template.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |