US3207219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for oil well paraffin control
Assignee: Individual
•
Filing: 1960-08-26
•
Granted: 1965-09-21
•
Expires: 1980-08-26
Abstract
No abstract record available.
Inventors
- 👤 Edgar L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
E; E21; E21B; E21B36/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A SYSTEM FOR CONTROLLING PARAFFIN IN THE TUBING OF AN OIL WELL HAVING A CASING, SAID SYSTEM COMPRISING A COMBINATION CIRCULATION STOP AND SWAB SURROUNDING THE TUBING AND POSITIONED AT A LEVEL BELOW THE HEAD OF THE WELL SO AS TO DEFINE A CIRCULATION ZONE ABOVE THE COMBINATION IN THE SPACE BETWEEN THE TUBING AND THE CASING, SAID COMBINATION OCCUPYING THE ANNULUS BETWEEN THE TUBING AND THE WELL CASING AND SERVING TO ISOLATE SAID ZONE FROM THE ANNULUS BELOW SAID COMBINATION, A CIRCULATION TANK, A PUMP CONNECTED TO SAID TANK AND HAVING A DISCHARGE LEADING INTO SAID ZONE AND AN INTAKE LEADING FROM THE UPPER PART OF SAID ZONE INTO THE TANK, SAID COMBINATION BEING OUT OF COMMUNICATION WITH THE TUBING, SAID DISCHARGE BEING A DOWN PIPE EXTENDING DOWNWARDLY ALONG AND SECURED TO THE TUBING IN THE SPACE BETWEEN THE TUBING AND THE CASING AND HAVING AN OPEN LOWER END NEAR TO AND SPACED UPWARDLY FROM SAID COMBINATION, AND A DOWNWARDLY OPENING CHECK VALVE IN SAID OPEN LOWER END.
Claim 2
Independent Claim
169 words
A SYSTEM FOR CONTROLLING PARAFFIN IN THE TUBING OF AN OIL WELL HAVING A CASING, SAID SYSTEM COMPRISING A COMBINATION CIRCULATION STOP AND SWAB SURROUNDING THE TUBING AND POSITIONED AT A LEVEL BELOW THE HEAD OF THE WELL SO AS TO DEFINE A CIRCULATION ZONE ABOVE THE COMBINATION IN THE SPACE BETWEEN THE TUBING AND THE CASING, SAID COMBINATION OCCUPYING THE ANNULUS BETWEEN THE TUBING AND THE WELL CASING AND SERVING TO ISOLATE SAID ZONE FROM THE ANNULUS BELOW SAID COMBINATION, A CIRCULATION TANK, A PUMP CONNECTED TO SAID TANK AND HAVING A DISCHARGE LEADING INTO SAID ZONE AND AN INTAKE LEADING FROM THE UPPER PART OF SAID ZONE INTO THE TANK, SAID COMBINATION BEING OUT OF COMMUNICATION WITH THE TUBING, SAID DISCHARGE BEING A DOWN PIPE EXTENDING DOWNWARDLY ALONG AND SECURED TO THE TUBING IN THE SPACE BETWEEN THE TUBING AND THE CASING AND HAVING AN OPEN LOWER END NEAR TO AND SPACED UPWARDLY FROM SAID COMBINATION, AND A DOWNWARDLY OPENING CHECK VALVE IN SAID OPEN LOWER END.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |