US3208728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use on floating drilling platforms
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1962-11-19
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Granted: 1965-09-28
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Mercer H Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:04
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/09; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
APPARATUS FOR SUSPENDING A TOOL IN A BOREHOLE ON A CABLE FROM A FLOATING OFFSHORE DRILLING PLATFORM COMPRISING: MEANS MOUNTED ON SAID PLATFORM ATTACHED TO SAID CABLE FOR RAISING AND LOWERING IT; SUSPENSION MEANS MOUNTED ON SAID PLATFORM INCLUDING A CYLINDER HAVING A PISTON SLIDABLY ARRANGED THEREIN; LIQUID IN SAID CYLINDER BELOW SAID PISTON; TENSION MEANS HAVING AN ADJUSTABLE TENSION PRESET TO A SELECTED TENSION SECURING SAID PISTON TO A FIXED, IMMOVABLE POINT; A SHEAVE ATTACHED TO SAID TENSION MEANS OVER WHICH SAID CABLE IS FED; AND MEANS RESPONSIVE TO CHANGES IN TENSION IN SAID TENSION MEANS RESULTING FROM VERTICAL MOVEMENT OF SAID PLATFORM ADAPTED TO COMPENSATE FOR MOTION OF THE TOOL ARISING FROM DISPLACEMENT OF THE PLATFORM AND SUSPENSION MEANS.
Claim 2
Dependent Claim
121 words
APPARATUS FOR SUSPENDING A TOOL IN A BOREHOLE ON A CABLE FROM A FLOATING OFFSHORE DRILLING PLATFORM COMPRISING: MEANS MOUNTED ON SAID PLATFORM ATTACHED TO SAID CABLE FOR RAISING AND LOWERING IT; SUSPENSION MEANS MOUNTED ON SAID PLATFORM INCLUDING A CYLINDER HAVING A PISTON SLIDABLY ARRANGED THEREIN; LIQUID IN SAID CYLINDER BELOW SAID PISTON; TENSION MEANS HAVING AN ADJUSTABLE TENSION PRESET TO A SELECTED TENSION SECURING SAID PISTON TO A FIXED, IMMOVABLE POINT; A SHEAVE ATTACHED TO SAID TENSION MEANS OVER WHICH SAID CABLE IS FED; AND MEANS RESPONSIVE TO CHANGES IN TENSION IN SAID TENSION MEANS RESULTING FROM VERTICAL MOVEMENT OF SAID PLATFORM ADAPTED TO COMPENSATE FOR MOTION OF THE TOOL ARISING FROM DISPLACEMENT OF THE PLATFORM AND SUSPENSION MEANS.
References Cited (Backward Citations)
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Cited
US2109297A
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US2857138A
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US2945676A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |