Patent US4440227A successfully refreshed from Google Patents.
US4440227A
Expired / Lapsed
US
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Well completion for injecting high purity oxygen in a fire flooding process
Assignee: Mobil Oil AS
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Filing: 1982-11-08
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Granted: 1984-04-03
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Expires: 2002-11-08
Abstract
Abstract A well completion for an injection well includes continuous tubing disposed within a tubing string. Oxygen is supplied to a fire flood process through the continuous tubing and water is supplied through the tubing string. The tubing string and continuous tubing are valved and seated in a manner which provides for safe injection of high purity oxygen into the subsurface formation.
Inventors
- 👤 Billy G. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:03
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
126 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said casing; continuous tubing disposed within said tubing string; means for seating said continuous tubing in said tubing string; means for supplying water to said tubing string; means for supplying oxygen to said continuous tubing; and a check valve near the bottom of said continuous tubing to allow oxygen to enter said formation through said continuous tubing and to prevent unreacted oxygen in said formation from traveling up said continuous tubing.
Claim 2
Dependent Claim
126 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said casing; continuous tubing disposed within said tubing string; means for seating said continuous tubing in said tubing string; means for supplying water to said tubing string; means for supplying oxygen to said continuous tubing; and a check valve near the bottom of said continuous tubing to allow oxygen to enter said formation through said continuous tubing and to prevent unreacted oxygen in said formation from traveling up said continuous tubing.
Claim 3
Dependent Claim
24 words
The well completion recited in claim 1 wherein said continuous tubing is flexible and is coiled on a reel before insertion in said well.
Claim 4
Dependent Claim
16 words
The well completion recited in claim 1 wherein said continuous tubing is corrosion resistant stainless steel.
Claim 5
Dependent Claim
62 words
The well completion recited in claim 1 wherein said means for seating said tubing string includes packing glands between said tubing string and the casing of said well at the top and bottom thereof, and forming a seal between said casing and said tubing string so that water can be contained between said casing and said tubing string between said packing glands.
Claim 6
Dependent Claim
126 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said well; continuous tubing disposed within said tubing string; means for seating said continuous tubing in said tubing string; means for supplying water to said tubing string; means for supplying oxygen to said continuous tubing; and a check valve near the bottom of said tubing string to allow water to enter said formation through said tubing string and to prevent unreacted oxygen in said formation from traveling up said tubing string.
Claim 7
Dependent Claim
126 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said well; continuous tubing disposed within said tubing string; means for seating said continuous tubing in said tubing string; means for supplying water to said tubing string; means for supplying oxygen to said continuous tubing; and a check valve near the bottom of said tubing string to allow water to enter said formation through said tubing string and to prevent unreacted oxygen in said formation from traveling up said tubing string.
Claim 8
Dependent Claim
24 words
The well completion recited in claim 5 wherein said continuous tubing is flexible and is coiled on a reel before insertion in said well.
Claim 9
Dependent Claim
16 words
The well completion recited in claim 5 wherein said continuous tubing is corrosion resistant stainless steel.
Claim 10
Dependent Claim
62 words
The well completion recited in claim 5 wherein said means for seating said tubing string includes packing glands between said tubing string and the casing of said well at the top and bottom thereof, and forming a seal between said casing and said tubing string so that water can be contained between said casing and said tubing string between said packing glands.
Claim 11
Dependent Claim
119 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said well; continuous tubing disposed within said tubing string; means for seating said continuous tubing comprising a packing gland at the top of said tubing string and a fitting at the bottom of said tubing string, said continuous tubing being inserted into an opening in said fitting; means for supplying water to said tubing string; and means for supplying oxygen to said continuous tubing.
Claim 12
Dependent Claim
119 words
A well completion for an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: a casing extending the length of said well and containing passages to provide fluid communication with the formation; a tubing string disposed within said casing; means for seating said tubing string in said well; continuous tubing disposed within said tubing string; means for seating said continuous tubing comprising a packing gland at the top of said tubing string and a fitting at the bottom of said tubing string, said continuous tubing being inserted into an opening in said fitting; means for supplying water to said tubing string; and means for supplying oxygen to said continuous tubing.
Claim 13
Dependent Claim
24 words
The well completion recited in claim 9 wherein said continuous tubing is flexible and is coiled on a reel before insertion in said well.
Claim 14
Dependent Claim
16 words
The well completion recited in claim 9 wherein said continuous tubing is corrosion resistant stainless steel.
Claim 15
Dependent Claim
62 words
The well completion recited in claim 9 wherein said means for seating said tubing string includes packing glands between said tubing string and the casing of said well at the top and bottom thereof, and forming a seal between said casing and said tubing string so that water can be contained between said casing and said tubing string between said packing glands.
Claim 16
Independent Claim
103 words
The method of establishing a combustion zone from an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: disposing a tubing string within said well and into said formation; seating continuous tubing within said tubing string so that the bottom of said continuous tubing is in proximity to said formation; supplying water to said formation through said tubing string; supplying oxygen to said formation through said continuous tubing; supplying oxygen to said formation through a check valve in said continuous tubing to prevent unreacted oxygen in said formation from traveling up said continuous tubing.
Claim 17
Independent Claim
103 words
The method of establishing a combustion zone from an injection well in a field in which hydrocarbons are recovered by in-situ combustion in a subsurface formation comprising: disposing a tubing string within said well and into said formation; seating continuous tubing within said tubing string so that the bottom of said continuous tubing is in proximity to said formation; supplying water to said formation through said tubing string; supplying oxygen to said formation through said continuous tubing; supplying oxygen to said formation through a check valve in said continuous tubing to prevent unreacted oxygen in said formation from traveling up said continuous tubing.
Claim 18
Dependent Claim
61 words
The method recited in claim 13 further comprising: sealing the opening between said tubing string and said continuous tubing at the bottom thereof; and supplying water to said formation through a check valve in said tubing string near the bottom thereof which allows water to enter said formation and prevents unreacted oxygen in said formation from traveling up said tubing string.
Claim 19
Dependent Claim
31 words
The method recited in claim 13 wherein said combustion zone is ignited, and said continuous tubing is thereafter run in said well so that oxygen can be supplied to said formation.
Claim 20
Dependent Claim
24 words
The well completion recited in claim 13 wherein said continuous tubing is flexible and is coiled on a reel before insertion in said well.
Claim 21
Dependent Claim
16 words
The well completion recited in claim 13 wherein said continuous tubing is corrosion resistant stainless steel.
Claim 22
Dependent Claim
62 words
The well completion recited in claim 13 wherein said means for seating said tubing string includes packing glands between said tubing string and the casing of said well at the top and bottom thereof, and forming a seal between said casing and said tubing string so that water can be contained between said casing and said tubing string between said packing glands.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |