Patent US3218659A successfully refreshed from Google Patents.
US3218659A
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Flow line pig injector
Assignee: Richfield Oil Corp
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Filing: 1963-03-26
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Granted: 1965-11-23
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Expires: 1983-03-26
Abstract
No abstract record available.
Inventors
- 👤 Paul R Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:04
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/26; F16L55/46; F16L2101/00; F16L2101/40; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
AN APPARATUS FOR INJECTING A CLEANING PIG INTO A FLOW LINE ARRANGED TO RECEIVE FLOW FROM A WELL THROUGH A WELL HEAD HAVING A CONTROLLED SHUT-OFF VALVE FOR PREVENTING FLUID FLOW BETWEEN SAID WELL AND SAID FLOW LINE, COMPRISING IN COMBINATION: A PIG STORAGE CHAMBER ARRANGED AND CONSTRUCTED TO SUPPLY A PIG TO SAID FLOW LINE, MEANS INCLUDING A PIG INJECTOR VALVE FOR PROVIDING COMMUNICATION BETWEEN SAID CHAMBER AND SAID FLOW LINE, SAID PIG INJECTOR VALVE BEING ARRANGED AND CONSTRUCTED TO DROP A PIG FROM SAID STORAGE CHAMBER INTO SAID FLOW LINE WHEN SAID INJECTOR VALVE IS ACTUATED, MEANS CONTROLLED CONJOINTLY WITH SAID SHUT-OFF VALVE FOR ACTUATING SAID INJECTOR VALVE TO DROP A PIG INTO SAID FLOW LINE WHEN SAID SHUT-OFF VALVE IS ACTUATED TO PREVENT SAID FLOW BETWEEN SAID WELL AND SAID FLOW LINE.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |