US3157233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling flow within a well
Assignee: Otis Engineering Corp
•
Filing: 1956-06-20
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Granted: 1964-11-17
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Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Phillip S Sizer
- 👤 Vonner R Cherry
- 👤 Lowell M Wilhoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:12
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/105; E21B2200/00; E21B2200/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
APPARATUS FOR CONTROLLING FLOW AT A SUBSURFACE LEVEL WITHIN A WELL CONDUIT COMPRISING LANDING MEANS DISPOSED IN SAID WELL CONDUIT AT A SUBSURFACE LEVEL, SAID LANDING MEANS HAVING AN OPENING THERETHROUGH IN SUBSTANTIAL ALIGNMENT WITH SAID WELL CONDUIT TO PERMIT THE RUNNING OF WELL TOOLS THERETHROUGH, VALVE MEANS MOVABLE THROUGH SAID WELL CONDUIT, MEANS, FOR RELEASABLY LOCKING SAID VALVE MEANS IN THE OPENING OF SAID LANDING MEANS, SAID VALVE MEANS BEING MOVABLE BETWEEN OPEN AND CLOSED POSITIONS TO CONTROL FLOW THROUGH SAID OPENING, SPRING MEANS FOR URGING SAID VALVE MEANS TO CLOSED POSITION, SAID VALVE MEANS INCLUDING PRESSURE-RESPONSIVE MEANS FOR URGING SAID VALVE MEANS TO OPEN POSITION AGAINST THE BIAS OF SAID SPRING MEANS, A SOURCE OF FLUID PRESSURE AT THE SURFACE OF SAID WELL AND CONDUIT MEANS CONNECTING SAID SOURCE OF FLUID PRESSURE TO SAID PRESSURE-RESPONSIVE MEANS.
Claim 2
Dependent Claim
138 words
APPARATUS FOR CONTROLLING FLOW AT A SUBSURFACE LEVEL WITHIN A WELL CONDUIT COMPRISING LANDING MEANS DISPOSED IN SAID WELL CONDUIT AT A SUBSURFACE LEVEL, SAID LANDING MEANS HAVING AN OPENING THERETHROUGH IN SUBSTANTIAL ALIGNMENT WITH SAID WELL CONDUIT TO PERMIT THE RUNNING OF WELL TOOLS THERETHROUGH, VALVE MEANS MOVABLE THROUGH SAID WELL CONDUIT, MEANS, FOR RELEASABLY LOCKING SAID VALVE MEANS IN THE OPENING OF SAID LANDING MEANS, SAID VALVE MEANS BEING MOVABLE BETWEEN OPEN AND CLOSED POSITIONS TO CONTROL FLOW THROUGH SAID OPENING, SPRING MEANS FOR URGING SAID VALVE MEANS TO CLOSED POSITION, SAID VALVE MEANS INCLUDING PRESSURE-RESPONSIVE MEANS FOR URGING SAID VALVE MEANS TO OPEN POSITION AGAINST THE BIAS OF SAID SPRING MEANS, A SOURCE OF FLUID PRESSURE AT THE SURFACE OF SAID WELL AND CONDUIT MEANS CONNECTING SAID SOURCE OF FLUID PRESSURE TO SAID PRESSURE-RESPONSIVE MEANS.
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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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |