US3716486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brine drilling fluid lubricant and process for drilling subterranean wells with same
Assignee: Milchem Inc
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Filing: 1971-03-18
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Granted: 1973-02-13
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Expires: 1991-03-18
Abstract
Abstract ENHANCED LUBRICATING PROPERTIES CAN BE OBTAINED IN A BRINE DRILLING FLUID BY UTILIZING AN ALKALINE WATER SOLUBLE SOLUTION OF A MONO- AND DI-HYDROGEN PHOSPHATE ESTER OF A FIVE MOLE ETHYLENE OXIDE ADDUCT OF A C10 LINEAR SATURATED ALCOHOL IN A SOLVENT SELECTED FROM THE CLASS CONSISTING OF MONOHYDRIC ALCOHOLS, WATER, AND MIXTURES THEREOF AND A SILICONE DEFOAMER.
Inventors
- 👤 A Perricone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |