Patent US3625889A successfully refreshed from Google Patents.
US3625889A
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US
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Well completion fluids
Assignee: Phillips Petroleum Co
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Filing: 1969-08-28
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Granted: 1971-12-07
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Expires: 1989-08-28
Abstract
Abstract Aqueous high-density well drilling, completion and packer fluids containing calcium chloride, a water soluble salt of carboxyalkyl cellulose and a gum produced by the action of a Xanthomonas bacterium on sugars.
Inventors
- 👤 Claud D Branscum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:11
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/06; C09K8/08; C09K8/10; Y; Y10; Y10S; Y10S507/00; Y10S507/925; Y10S507/926
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
The drilling fluid of claim 1 in which said calcium chloriDe is present in said fluid in an amount of about 155 pounds per barrel of fluid.
References Cited (Backward Citations)
US2805722A
Cited
US2969322A
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US3000818A
Cited
US3012606A
Cited
US3198268A
Cited
US3319715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |