US2801077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of lost circulation in a drilling well
Assignee: Pan American Petroleum Corp
•
Filing: 1953-12-30
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Granted: 1957-07-30
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Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 George C Howard
- 👤 Jr Platho P Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003; E21B33/00; E21B33/10; E21B33/13; E21B33/138; Y; Y10; Y10S; Y10S507/00; Y10S507/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
APROCESS FOR THE RECOVERY OF CIRCULATION IN A DRILLING WELL THAT PENETRATES A FORMATION WHICH TAKES WHOLE MUD COMPRISING INTIMATELY MIXING WITHIN SAID WELL A NON-AQUEOUS LIQUID SLURRY OF FINELY DIVIDED HYDRAULIC CEMENT AND CLAY WITH AN AQUEOUS LIQUID, THE CONCENTRATION OF SAID CLAY IN SAID NON-AQUEOUS LIQUID, SLURRY BEING GREAT ENOUGH TO PRODUCE A MIXTURE TOO VISCOUS TO PUMP AND DISPLACING AT LEAST A PART OF LSAID MIXTURE INTO SAID FORMATION.
Claim 2
Dependent Claim
72 words
APROCESS FOR THE RECOVERY OF CIRCULATION IN A DRILLING WELL THAT PENETRATES A FORMATION WHICH TAKES WHOLE MUD COMPRISING INTIMATELY MIXING WITHIN SAID WELL A NON-AQUEOUS LIQUID SLURRY OF FINELY DIVIDED HYDRAULIC CEMENT AND CLAY WITH AN AQUEOUS LIQUID, THE CONCENTRATION OF SAID CLAY IN SAID NON-AQUEOUS LIQUID, SLURRY BEING GREAT ENOUGH TO PRODUCE A MIXTURE TOO VISCOUS TO PUMP AND DISPLACING AT LEAST A PART OF LSAID MIXTURE INTO SAID FORMATION.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |