Patent US3215087A successfully refreshed from Google Patents.
US3215087A
Expired / Lapsed
US
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Gas lift system
Assignee: ExxonMobil Upstream Research Co
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Filing: 1963-10-03
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Granted: 1965-11-02
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Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry O Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD FOR LIFTING A LIQUID IN A CONDUIT WITHIN A BOREHOLE WHICH COMPRISES INTRODUCING A SLUG OF A FIRST LIQUID INTO SAID CONDUIT NEAR THE LOWER END OF SAID BOREHOLE, SAID SLUG BEING INTRODUCED BENEATH A COLUMN OF A SECOND LIQUID PRESENT IN SAID CONDUIT, SAID FIRST LIQUID BEING SUBSTANTIALLY IMMISCIBLE WITH SAID SECOND LIQUID, SAID FIRST LIQUID HAVING A SUBSTANTIALLY HIGHER VISCOSITY THAN SAID SECOND LIQUID, AND SAID FIRST LIQUID BEING SUBSTANTIALLY NONWETTING WITH RESPECT TO THE WALLS OF SAID CONDUIT, AND THEREAFTER INTRODUCING SUFFICIENT GAS INTO SAID CONDUIT BENEATH SAID SLUG TO LIFT SAID LIQUIDS UPWARDLY WITHIN SAID CONDUIT.
Claim 2
Independent Claim
102 words
A METHOD FOR LIFTING A LIQUID IN A CONDUIT WITHIN A BOREHOLE WHICH COMPRISES INTRODUCING A SLUG OF A FIRST LIQUID INTO SAID CONDUIT NEAR THE LOWER END OF SAID BOREHOLE, SAID SLUG BEING INTRODUCED BENEATH A COLUMN OF A SECOND LIQUID PRESENT IN SAID CONDUIT, SAID FIRST LIQUID BEING SUBSTANTIALLY IMMISCIBLE WITH SAID SECOND LIQUID, SAID FIRST LIQUID HAVING A SUBSTANTIALLY HIGHER VISCOSITY THAN SAID SECOND LIQUID, AND SAID FIRST LIQUID BEING SUBSTANTIALLY NONWETTING WITH RESPECT TO THE WALLS OF SAID CONDUIT, AND THEREAFTER INTRODUCING SUFFICIENT GAS INTO SAID CONDUIT BENEATH SAID SLUG TO LIFT SAID LIQUIDS UPWARDLY WITHIN SAID CONDUIT.
References Cited (Backward Citations)
US1740102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |