US3189099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead closure
Assignee: Shell USA Inc
•
Filing: 1962-06-27
•
Granted: 1965-06-15
•
Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Lloyd G Ottemau
- 👤 Nicholas B Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:59
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A REMOTELY POSITIONABLE AND REMOVABLE WELLHEAD BORE CLOSURE APPARATUS ADAPTED TO CLOSE IN A FLUIDTIGHT MANNER THE BORE AT THE TOP OF A TUBULAR PRODUCTION WELLHEAD IN A FLUIDTIGHT MANNER, SAID BORE CLOSURE APPARATUS COMPRISING A PLUNGER-LIKE BODY MEMBER OF A SIZE TO OPERATIVELY ENGAGE AND CLOSE THE OPEN TOP OF A TUBULAR WELLHEAD HAVING LOCKING RECESS MEANS FORMED IN THE ADJACENT WALL THEREOF, SPRING-LOADED LATCH MEANS CARRIED BY SAID BODY MEMBER AND NORMALLY EXTENDING BEYOND THE OUTER SURFACE THEREOF, SAID LATCH MEANS BEING OF A SIZE TO SEAT WITHIN THE RECESS MEANS IN THE WALL OF SAID WELLHEAD, SEALING MEANS CARRIED ON THE OUTER SURFACE OF SAID BODY MEMBER FOR ESTABLISHING A FLUIDTIGHT SEAL BETWEEN SAID BODY MEMBER AND SEAL WELLHEAD, CAMMING SURFACES FORMED ON THE UPPER AND LOWER FACES OF THOSE PORTIONS OF SAID SPRING-LOADED LATCH MEANS EXTENDING OUTWARDLY BEYOND THE OUTER SUR-
Claim 2
Dependent Claim
145 words
A REMOTELY POSITIONABLE AND REMOVABLE WELLHEAD BORE CLOSURE APPARATUS ADAPTED TO CLOSE IN A FLUIDTIGHT MANNER THE BORE AT THE TOP OF A TUBULAR PRODUCTION WELLHEAD IN A FLUIDTIGHT MANNER, SAID BORE CLOSURE APPARATUS COMPRISING A PLUNGER-LIKE BODY MEMBER OF A SIZE TO OPERATIVELY ENGAGE AND CLOSE THE OPEN TOP OF A TUBULAR WELLHEAD HAVING LOCKING RECESS MEANS FORMED IN THE ADJACENT WALL THEREOF, SPRING-LOADED LATCH MEANS CARRIED BY SAID BODY MEMBER AND NORMALLY EXTENDING BEYOND THE OUTER SURFACE THEREOF, SAID LATCH MEANS BEING OF A SIZE TO SEAT WITHIN THE RECESS MEANS IN THE WALL OF SAID WELLHEAD, SEALING MEANS CARRIED ON THE OUTER SURFACE OF SAID BODY MEMBER FOR ESTABLISHING A FLUIDTIGHT SEAL BETWEEN SAID BODY MEMBER AND SEAL WELLHEAD, CAMMING SURFACES FORMED ON THE UPPER AND LOWER FACES OF THOSE PORTIONS OF SAID SPRING-LOADED LATCH MEANS EXTENDING OUTWARDLY BEYOND THE OUTER SUR-
References Cited (Backward Citations)
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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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |