US3344859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting paraffin deposition in oil wells
Assignee: Sinclair Research Inc
•
Filing: 1964-04-30
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Granted: 1967-10-03
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Salim M Bucaram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF INHIBITING PARAFFIN DEPOSITION IN AN OIL WELL BY DEPOSITING NAPHTHALENE IN THE UNDERGROUND OILBEARING FORMATION ADJACENT THE WELL WHICH CONSISTS ESSENTIALLY OF INTRODUCING INTO SAID WELL FORMATION, AT A TEMPERATURE ABOVE ABOUT 200*F., A SOLUTION OF NAPHTHALENE IN CRUDE OIL PREVIOUSLY PRODUCED BY THE WELL BEING TREATED CONTAINING FROM ABOUT 30% TO 80% BY WEIGHT OF NAPHTHALENE BASED ON THE WEIGHT OF THE OIL AND ALLOWING THE SOLUTION TO COOL TO FORMATION TEMPERATURE WHEREBY A MAJOR PORTION OF THE NAPHTHALENE IS DEPOSITED IN THE FORMATION WHEN THE SOLUTION OF OIL AND NAPHTHALENE REACHES THE TEMPERATURE OF THE FORMATION.
Claim 2
Independent Claim
101 words
A METHOD OF INHIBITING PARAFFIN DEPOSITION IN AN OIL WELL BY DEPOSITING NAPHTHALENE IN THE UNDERGROUND OILBEARING FORMATION ADJACENT THE WELL WHICH CONSISTS ESSENTIALLY OF INTRODUCING INTO SAID WELL FORMATION, AT A TEMPERATURE ABOVE ABOUT 200*F., A SOLUTION OF NAPHTHALENE IN CRUDE OIL PREVIOUSLY PRODUCED BY THE WELL BEING TREATED CONTAINING FROM ABOUT 30% TO 80% BY WEIGHT OF NAPHTHALENE BASED ON THE WEIGHT OF THE OIL AND ALLOWING THE SOLUTION TO COOL TO FORMATION TEMPERATURE WHEREBY A MAJOR PORTION OF THE NAPHTHALENE IS DEPOSITED IN THE FORMATION WHEN THE SOLUTION OF OIL AND NAPHTHALENE REACHES THE TEMPERATURE OF THE FORMATION.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |