Patent US3159473A successfully refreshed from Google Patents.
US3159473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature dehydration of well fluids
Assignee: Shell USA Inc
•
Filing: 1960-08-19
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Granted: 1964-12-01
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Expires: 1980-08-19
Abstract
No abstract record available.
Inventors
- 👤 Douglas C Meyers
- 👤 Clifford L Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF DEHYDRATING A HIGH-PRESSURE, GASCONTAINING WELL STREAM WHICH COMPRISES THE STEPS OF: EXPANDING AT LEAST THE PREDOMINANTLY GASEOUS PORTION OF SAID WELL STREAM TO A SUPERATMOSPHERIC SEPARATING PRESSURE BELOW THAT OF THE WELL STREAM AND INTRODUCING THE SAID PORTION INTO A CONFINED SEPARATING ZONE AT A TEMPERATURE BELOW THAT AT WHICH HYDRATES ARE FORMED AT THE SAID SEPARATING PRESSURE; PRECIPITATING NON-GSEOUS CONSTITUENTS INCLUDING HYDRATES FROM SAID ADMITTED PORTION WITHIN SAID ZONE AND THEREBY FORMING THEREIN A STRATUM OF SLUSH; WITHDRAWING RESIDUAL GAS SUBSTANTIALLY AT SAID SEPARATING PRESSURE FROM SAID ZONE; TRANSFERRING SAID SLUSH FROM SAID SEPARATING ZONE TO A CONFINED MELTING ZONE; MELTING THE HYDRATES IN SAID SLUSH WITHIN SAID MELTING ZONE AT A PRESSURE LOWER THAN SAID SEPARATING PRESSURE; AND DISCHARGING LIQUID FROM SAID MELTING ZONE.
Claim 2
Independent Claim
129 words
THE METHOD OF DEHYDRATING A HIGH-PRESSURE, GASCONTAINING WELL STREAM WHICH COMPRISES THE STEPS OF: EXPANDING AT LEAST THE PREDOMINANTLY GASEOUS PORTION OF SAID WELL STREAM TO A SUPERATMOSPHERIC SEPARATING PRESSURE BELOW THAT OF THE WELL STREAM AND INTRODUCING THE SAID PORTION INTO A CONFINED SEPARATING ZONE AT A TEMPERATURE BELOW THAT AT WHICH HYDRATES ARE FORMED AT THE SAID SEPARATING PRESSURE; PRECIPITATING NON-GSEOUS CONSTITUENTS INCLUDING HYDRATES FROM SAID ADMITTED PORTION WITHIN SAID ZONE AND THEREBY FORMING THEREIN A STRATUM OF SLUSH; WITHDRAWING RESIDUAL GAS SUBSTANTIALLY AT SAID SEPARATING PRESSURE FROM SAID ZONE; TRANSFERRING SAID SLUSH FROM SAID SEPARATING ZONE TO A CONFINED MELTING ZONE; MELTING THE HYDRATES IN SAID SLUSH WITHIN SAID MELTING ZONE AT A PRESSURE LOWER THAN SAID SEPARATING PRESSURE; AND DISCHARGING LIQUID FROM SAID MELTING ZONE.
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |