US3143172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning landing base for off-shore deep water drilling
Assignee: Richfield Oil Corp
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Filing: 1961-10-16
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Granted: 1964-08-04
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Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:25
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
LANDING BASE APPARATUS FOR USE WITH A CONDUCTOR PIPE IN OFF-SHORE DRILLING OPERATIONS CONDUCTED IN AN UNDERWATER FORMATION FROM FLOATING VESSEL, COMPRISING IN COMBINATION: A BASE MEMBER ADAPTED TO LAND ON SAID FORMATION, SAID BASE MEMBER INCLUDING MEANS FOR SUPPORTING SAID CONDUCTOR IN SAID FORMATION AND MEANS ASSOCIATED WITH SAID CONDUCTOR PIPE SO ARRANGED AND PROPORTIONED THAT SAID CONDUCTOR PIPE IS UNIVERSALLY MOVABLE RELATIVE TO SAID BASE MEMBER WHEREBY SAID CONDUCTOR PIPE MAINTAINS SUBSTANTIALLY VERTICAL ALIGNMENT IRRESPECTIVE OF THE SLOPE OF SAID FORMATION ON WHICH SAID BASE MEMBER IS LANDED.
Claim 2
Dependent Claim
90 words
LANDING BASE APPARATUS FOR USE WITH A CONDUCTOR PIPE IN OFF-SHORE DRILLING OPERATIONS CONDUCTED IN AN UNDERWATER FORMATION FROM FLOATING VESSEL, COMPRISING IN COMBINATION: A BASE MEMBER ADAPTED TO LAND ON SAID FORMATION, SAID BASE MEMBER INCLUDING MEANS FOR SUPPORTING SAID CONDUCTOR IN SAID FORMATION AND MEANS ASSOCIATED WITH SAID CONDUCTOR PIPE SO ARRANGED AND PROPORTIONED THAT SAID CONDUCTOR PIPE IS UNIVERSALLY MOVABLE RELATIVE TO SAID BASE MEMBER WHEREBY SAID CONDUCTOR PIPE MAINTAINS SUBSTANTIALLY VERTICAL ALIGNMENT IRRESPECTIVE OF THE SLOPE OF SAID FORMATION ON WHICH SAID BASE MEMBER IS LANDED.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |