Patent US3581822A successfully refreshed from Google Patents.
US3581822A
Expired / Lapsed
US
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Method of preventing casing and/or tubing damage in steam injection well
Assignee: Phillips Petroleum Co
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Filing: 1968-12-30
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Granted: 1971-06-01
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Expires: 1988-12-30
Abstract
Abstract Oil is produced from an underground oil-yielding stratum by injecting through a well into said stratum a stream of hot injection fluid obtained by mixing steam and water at the surface of the earth prior to introduction into said well. The water reduces the temperature of the steam to a valve which is not detrimental to the well casing and/or tubing. In one embodiment, the well may be used in a ''''huff and puff'''' process and then as an injection well in a direct drive process.
Inventors
- 👤 Archie J Cornelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:47
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
A method according to claim 1 wherein said hot injection fluid of step (b) has a temperature not greater than about 425* F.
Claim 2
Dependent Claim
27 words
A method according to claim 2 wherein said hot injection fluid of step (b) has a temperature within the range of about 350* to about 400* F.
Claim 3
Dependent Claim
45 words
The method of claim 1 including The further steps of: d. terminating the injection of step (c); e. reducing the pressure on said well and allowing said oil having improved flow characteristics to flow into said well; and f. recovering said oil from said well.
Claim 4
Dependent Claim
101 words
The method of claim 4 wherein: said stratum is penetrated by a second well spaced apart from said other well; said steps (a), (b), (c), (d), (e), and (f) are repeated for a number of cycles sufficient to heat substantially all of said stratum between said wells; said second well is shut in during said cycles; then, after the last of said cycles, repeating said steps (a), (b), and (c); continuing the injection of said last-mentioned step (c) for a period of time sufficient to drive said oil into said second well, and said oil is produced from said second well.
Claim 5
Dependent Claim
22 words
The method of claim 5 wherein said hot injection fluid of step (b) has a temperature not greater than about 425* F.
Claim 6
Dependent Claim
26 words
The method of claim 6 wherein said hot injection fluid of step (b) has a temperature within the range of about 350* to about 400* F.
Claim 7
Dependent Claim
53 words
The method of claim 5 wherein: said steam is generated in a steam generation zone; said water is at substantially ambient temperature; said steam and said water are mixed downstream from said steam generation zone; and said hot injection fluid has a temperature within the range of about 350* to about 400* F.
Claim 8
Dependent Claim
50 words
The method of claim 1 wherein said stratum is penetrated by a second well spaced apart from said other well, said injection of step (c) is continued for a period of time sufficient to drive said oil into said second well, and said oil is produced from said second well.
Claim 9
Dependent Claim
22 words
The method of claim 9 wherein said hot injection fluid of step (b) has a temperature not greater than about 425* F.
Claim 10
Dependent Claim
26 words
The method of claim 10 wherein said hot injection fluid of step (b) has a temperature within the range of about 350* to about 400* F.
Claim 11
Dependent Claim
53 words
The method of claim 1 wherein: said steam is generated in a steam generation zone; said water is at substantially ambient temperature; said steam and said water are mixed downstream from said steam generation zone; and said hot injection fluid has a temperature within the range of about 350* to about 400* F.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |