US3284353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling mud and process
Assignee: Hercules LLC
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Filing: 1963-09-27
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Granted: 1966-11-08
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Expires: 1983-09-27
Abstract
No abstract record available.
Inventors
- 👤 Jack B Batdorf
- 👤 Jr Richard T Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
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
76 words
A WATER BASE WELL DRILLING MUD HAVING IMPROVED STABILITY AND WATER LOSS PROPERTIES UNDER ELEVATED TEMPERATURE AND HIGH SALT CONCENTRATION CONDITIONS, SAID MUD COMPRISING AN AQUEOUS MIXTURE CONTAINING SUSPENDED SOLIDS WHICH FORMS A FILTER CAKE ON THE WALL OF THE WELL AND CARBOXYLMETHYL HYDROXYETHYL CELLULOSE HAVING A CARBOXYMETHYL D.S. OF 0.05-0.2 AND A HYSROXYETHYL M.S. OF 1.5-2.5, THE AMOUNT OF SAID CARBOXYLMETHYL HYDROXYETHYL CELLULOSE BEING AT LEAST ABOUT 0.5 POUND PER BARREL OF SAID DRILLING MUD.
Claim 2
Dependent Claim
76 words
A WATER BASE WELL DRILLING MUD HAVING IMPROVED STABILITY AND WATER LOSS PROPERTIES UNDER ELEVATED TEMPERATURE AND HIGH SALT CONCENTRATION CONDITIONS, SAID MUD COMPRISING AN AQUEOUS MIXTURE CONTAINING SUSPENDED SOLIDS WHICH FORMS A FILTER CAKE ON THE WALL OF THE WELL AND CARBOXYLMETHYL HYDROXYETHYL CELLULOSE HAVING A CARBOXYMETHYL D.S. OF 0.05-0.2 AND A HYSROXYETHYL M.S. OF 1.5-2.5, THE AMOUNT OF SAID CARBOXYLMETHYL HYDROXYETHYL CELLULOSE BEING AT LEAST ABOUT 0.5 POUND PER BARREL OF SAID DRILLING MUD.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |