US3766874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moored barge for arctic offshore oil drilling
Assignee: General Dynamics Corp
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Filing: 1971-07-29
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Granted: 1973-10-23
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Expires: 1991-07-29
Abstract
Abstract A barge is provided for offshore oil drilling in Arctic waters. The barge is formed of two frusto-conical sections (with the points of the extended cones being pointed downward) with the lower section being steeper than the upper section. The angle of the upper cone serves to break ice impinging on the hull by riding up and breaking ice in bending. The hull is moored by lines connected at the line of joinder between the two conical sections, which is below the waterline.
Inventors
- 👤 J Helm
- 👤 R West
- 👤 V Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:41
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/44; B63B35/4413; B63B35/08; B63B2211/00; B63B2211/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A floating oil drilling barge comprising: a. an upper upright frusto-conical section; b. a lower upright frusto-conical section of a steeper angle than said upper section, said sections being joined together to form a hull having a bottom, said hull having within it a central vertical cylindrical opening in communication with the body of water in which said hull is floating; and c. means connected to said barge for mooring it in a body of water, said means engaging the outer surface of said barge at the line of joinder of said sections.
Claim 2
Dependent Claim
93 words
A floating oil drilling barge comprising: a. an upper upright frusto-conical section; b. a lower upright frusto-conical section of a steeper angle than said upper section, said sections being joined together to form a hull having a bottom, said hull having within it a central vertical cylindrical opening in communication with the body of water in which said hull is floating; and c. means connected to said barge for mooring it in a body of water, said means engaging the outer surface of said barge at the line of joinder of said sections.
References Cited (Backward Citations)
US3279404A
Cited
US3423777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |