Patent US4454418A successfully refreshed from Google Patents.
Patent US3096383A successfully refreshed from Google Patents.
US3096383A
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Automatic process for prevention of gas hydrate formation
Assignee: Phillips Petroleum Co
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Filing: 1959-05-18
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Granted: 1963-07-02
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Paul D Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:09
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95; Y10S585/956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD FOR INHIBITING HYDRATE FORMATION IN A GASEOUS HYDROCARBON STREAM CONTAINING 1 TO 3500 POUNDS OF WATER VAPOR PER MILLION STANDARD CUBIC FEET OF GAS WHICH COMPRISES CONTINUOUSLY ADDING A PREDETERMINED MINIMUM OF HYDRATE INHIBITOR OF SAID STREAM, CONTINUOUSLY PASSING THE STREAM THROUGH A FLOW RESTRICTION ZONE COMPRISING AN INDIRECT HEAT EXCHANGE ZONE, CONTINUOUSLY DETECTING THE DIFFERENTIAL PRESSURE ACROSS SAID FLOW RESTRICTION ZONE BY MEASURING THE PRESSURE OF THE FLOWING STREAM IMMEDIATELY UPSTREAM OF SAID ZONE AND IMMEDIATELY DOWNSTREAM OF SAID ZONE TO OBTAIN SAID DIFFERENTIAL PRESSURE, COMPRISING AN INDIRECT HEAT EXCHANGE ZONE, CONTINUOUSLY UPSTREAM OF SAID ZONE DIRECTLY RESPONSIVE TO CHANGES IN SAID MEASURED PRESSURE DIFFERENTIAL DUE TO HYDRATE FORMATION AT SAID RESTRICTION ZONE BY INCREASING THE ADDITION OF HYDRATE INHIBITOR ADDED TO SAID STREAM WHEN SAID DIFFERENTIAL PRESSURE INCREASES AND LOWERING THE RATE OF HYDRATE INHIBITOR ADDITION TOWARD SAID MINIMUM ADDITION RATE WHEN SAID DIFFERENTIAL PRESSURE FALLS, THUS MAINTAINING SAID DIFFERENTIAL PRESSURE SUBSTANTIALLY CONSTANT AT A PREDETERMINED VALUE.
Claim 2
Independent Claim
161 words
A METHOD FOR INHIBITING HYDRATE FORMATION IN A GASEOUS HYDROCARBON STREAM CONTAINING 1 TO 3500 POUNDS OF WATER VAPOR PER MILLION STANDARD CUBIC FEET OF GAS WHICH COMPRISES CONTINUOUSLY ADDING A PREDETERMINED MINIMUM OF HYDRATE INHIBITOR OF SAID STREAM, CONTINUOUSLY PASSING THE STREAM THROUGH A FLOW RESTRICTION ZONE COMPRISING AN INDIRECT HEAT EXCHANGE ZONE, CONTINUOUSLY DETECTING THE DIFFERENTIAL PRESSURE ACROSS SAID FLOW RESTRICTION ZONE BY MEASURING THE PRESSURE OF THE FLOWING STREAM IMMEDIATELY UPSTREAM OF SAID ZONE AND IMMEDIATELY DOWNSTREAM OF SAID ZONE TO OBTAIN SAID DIFFERENTIAL PRESSURE, COMPRISING AN INDIRECT HEAT EXCHANGE ZONE, CONTINUOUSLY UPSTREAM OF SAID ZONE DIRECTLY RESPONSIVE TO CHANGES IN SAID MEASURED PRESSURE DIFFERENTIAL DUE TO HYDRATE FORMATION AT SAID RESTRICTION ZONE BY INCREASING THE ADDITION OF HYDRATE INHIBITOR ADDED TO SAID STREAM WHEN SAID DIFFERENTIAL PRESSURE INCREASES AND LOWERING THE RATE OF HYDRATE INHIBITOR ADDITION TOWARD SAID MINIMUM ADDITION RATE WHEN SAID DIFFERENTIAL PRESSURE FALLS, THUS MAINTAINING SAID DIFFERENTIAL PRESSURE SUBSTANTIALLY CONSTANT AT A PREDETERMINED VALUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |