US3080921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater wellhead apparatus
Assignee: Shell USA Inc
•
Filing: 1961-04-27
•
Granted: 1963-03-12
•
Expires: 1981-04-27
Abstract
No abstract record available.
Inventors
- 👤 John E Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:56
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN UNDERWATER WELLHEAD APPARATUS ADAPTED TO BE POSITIONED ON THE OCEAN FLOOR, SAID APPARATUS COMPRISING A WELLHEAD SUPPORT BASE HAVING A HOLE THERETHROUGH, A TUBULAR WELL MEMBER EXTENDING THROUGH THE HOLE IN SAID SUPPORT BASE, AT LEAST THE UPPER PORTION OF SAID WELL MEMBER FORMING AT LEAST A PORTION OF A CASINGHEAD FOR A WELL, LATERALLY-EXTENDING SEATING MEANS CARRIED OUTWARDLY ON SAID WELL MEMBER, SAID SEATING MEANS TOGETHER WITH SAID WELL MEMBER PROJECTING OVER A LENGTH GREATER THAN THE DIAMETER OF SAID SUPPORT BASE HOLE, A PLURALITY OF ANCHORING MEANS FIXEDLY SECURED TO SAID SUPPORT BASE ADJACENT THE HOLE THERETHROUGH AND AROUND THE PERIPHERY THEREOF, LATCH
Claim 2
Dependent Claim
106 words
AN UNDERWATER WELLHEAD APPARATUS ADAPTED TO BE POSITIONED ON THE OCEAN FLOOR, SAID APPARATUS COMPRISING A WELLHEAD SUPPORT BASE HAVING A HOLE THERETHROUGH, A TUBULAR WELL MEMBER EXTENDING THROUGH THE HOLE IN SAID SUPPORT BASE, AT LEAST THE UPPER PORTION OF SAID WELL MEMBER FORMING AT LEAST A PORTION OF A CASINGHEAD FOR A WELL, LATERALLY-EXTENDING SEATING MEANS CARRIED OUTWARDLY ON SAID WELL MEMBER, SAID SEATING MEANS TOGETHER WITH SAID WELL MEMBER PROJECTING OVER A LENGTH GREATER THAN THE DIAMETER OF SAID SUPPORT BASE HOLE, A PLURALITY OF ANCHORING MEANS FIXEDLY SECURED TO SAID SUPPORT BASE ADJACENT THE HOLE THERETHROUGH AND AROUND THE PERIPHERY THEREOF, LATCH
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |