US3830303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of well completion in permafrost
Assignee: Atlantic Richfield Co
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Filing: 1974-02-21
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Granted: 1974-08-20
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Expires: 1994-02-21
Abstract
Abstract A method and apparatus for drilling, completing, and/or producing a well through a permafrost zone wherein a liquid such as water is either introduced into a thawed region of the permafrost to prevent compaction of the permafrost or liquid is removed from a thawed region in the permafrost zone to prevent the generation of abnormal pressures on a wellbore and/or apparatus therein should the liquid freeze. A method for completing a well in a permafrost zone wherein a pipe is run into the wellbore adjacent to the casing and the pipe is perforated after placement in the wellbore to provide means for introducing liquid into and removing liquid from the permafrost zone.
Inventors
- 👤 T Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:36
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B43/00; E21B43/11; Y; Y10; Y10S; Y10S166/00; Y10S166/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
53 words
A method for completing a well in a permafrost zone comprising drilling a wellbore therein, running casing in said wellbore, running a pipe adjacent said casing in said wellbore, and perforating said pipe toward said permafrost at a plurality of points along the length of said pipe which is in said permafrost zone.
Claim 2
Independent Claim
53 words
A method for completing a well in a permafrost zone comprising drilling a wellbore therein, running casing in said wellbore, running a pipe adjacent said casing in said wellbore, and perforating said pipe toward said permafrost at a plurality of points along the length of said pipe which is in said permafrost zone.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein said casing and pipe are cemented in, and said permafrost step perforates said pipe, cement, and permafrost.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |