US3760875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating structure with rotatable templet for connecting guide lines thereto
Assignee: Shell USA Inc
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Filing: 1971-05-26
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Granted: 1973-09-25
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Expires: 1991-05-26
Abstract
Abstract A constant tension system for guide lines used in connecting an underwater wellhead to a dynamically stationed ship wherein twisting of the guidelines is prevented by mounting the guidelines on a rotatable templete disposed on the structure.
Inventors
- 👤 B Busking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:10
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206; G05D1/0208; E; E21; E21B; E21B15/00; E21B15/02; E21B19/00; E21B19/08; E21B19/09; E21B41/00; E21B41/10; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
An improvement in a floating structure provided with a dynamic stationing system, including a moonpool extending substantially vertically through the structure and suitable for passing equipment therethrough when carrying out well drilling, completion, workover and/or production operations, a derrick mounted on the structure at a location above the moonpool, and underwater wellhead equipment disposed on the floor of the body of water, said improvement comprising: a templet mounted around the moonpool, said templet being rotatable with respect to the floating structure and the derrick mounted thereon, at least one constant tension device mounted on the templet, and an elongated flexible hose cable being coupled at one end thereof to the constant tension device, the other end of the hose cable being suitable for connection to the underwater well equipment.
Claim 2
Dependent Claim
129 words
An improvement in a floating structure provided with a dynamic stationing system, including a moonpool extending substantially vertically through the structure and suitable for passing equipment therethrough when carrying out well drilling, completion, workover and/or production operations, a derrick mounted on the structure at a location above the moonpool, and underwater wellhead equipment disposed on the floor of the body of water, said improvement comprising: a templet mounted around the moonpool, said templet being rotatable with respect to the floating structure and the derrick mounted thereon, at least one constant tension device mounted on the templet, and an elongated flexible hose cable being coupled at one end thereof to the constant tension device, the other end of the hose cable being suitable for connection to the underwater well equipment.
Claim 3
Dependent Claim
72 words
A floating structure according to claim 1, and in addition A marine conductor extending from the floating structure to the wellhead, a supporting cable which is connected at one end thereof to a rotatable bearing element suitable for being connected to said marine conductor, and connected at the other end to a constant tension device which is mounted on a part of the structure which is stationary with respect to the templet.
Claim 4
Dependent Claim
61 words
A floating structure according to claim 1 and in addition drive means for rotating the rotatable templet, measuring means for measuring the deviation of the structure with respect to a predetermined heading and for controlling the drive means for so rotating the rotatable templet that the deviation of the templet with respect to the predetermined heading is as small as possible.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |