Patent US3048235A successfully refreshed from Google Patents.
Patent US2854407A successfully refreshed from Google Patents.
US2854407A
Expired / Lapsed
US
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Drilling fluid and method
Assignee: Great Western Drilling Co
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Filing: 1956-07-10
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Granted: 1958-09-30
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Expires: 1976-07-10
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Mallory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:26
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN THE METHOD OF DRILLING THROUGH A SUBSURFACE HYDRATABLE CLAY OR SHALE FORMATION WHEREIN A DRILLING MUD IS CONTINUOUSLY CIRCULATED THROUGH A DRILL PIPE AND DRILLING BIT, THE IMPROVEMENT WHICH COMPRISES CIRCULATING THROUGH THE DRILL PIPE AND DRILLING BIT A DRILLING MUD INCLUDING AN AQUEOUS LIQUID, A CLAYEY MATERIAL, AND A MINOR AMOUNT OF A FLUOCCULATN COMPRISING UNOXIDIZED GALACTOMANNAN OBTAINED FROM GUAR AND DISPERSED IN THE LIQUID FOR FLOCCULATING HYDRATABLE CLAY AND SHALE SOLIDS, SAID AMOUNT BEING LESS THAN THAT NECESSARY TO SUBSTANTIALLY REDUCE FILTRATION LOSS.
Claim 2
Dependent Claim
86 words
IN THE METHOD OF DRILLING THROUGH A SUBSURFACE HYDRATABLE CLAY OR SHALE FORMATION WHEREIN A DRILLING MUD IS CONTINUOUSLY CIRCULATED THROUGH A DRILL PIPE AND DRILLING BIT, THE IMPROVEMENT WHICH COMPRISES CIRCULATING THROUGH THE DRILL PIPE AND DRILLING BIT A DRILLING MUD INCLUDING AN AQUEOUS LIQUID, A CLAYEY MATERIAL, AND A MINOR AMOUNT OF A FLUOCCULATN COMPRISING UNOXIDIZED GALACTOMANNAN OBTAINED FROM GUAR AND DISPERSED IN THE LIQUID FOR FLOCCULATING HYDRATABLE CLAY AND SHALE SOLIDS, SAID AMOUNT BEING LESS THAN THAT NECESSARY TO SUBSTANTIALLY REDUCE FILTRATION LOSS.
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |