US3150085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling a well through a subsurface formation employing an oil-in-water emulsion drilling fluid
Assignee: Great Western Drilling Co
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Filing: 1956-06-14
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Granted: 1964-09-22
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Expires: 1976-06-14
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Mallory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:03
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE METHOD OF DRILLING THROUGH A SUBSURFACE FORMATION WHEREIN A DRILLING FLUID IS CONTINUOUSLY CIRCULATED THROUGH A DRILL PIPE AND DRILLING BIT, THE IMPROVEMENT WHICH COMPRISES PASSING TO THE DRILLING BIT A SUBSTANTIALLY SOLIDS-FREE OIL-IN-WATER EMULSION DRILLING FLUID INCLUDING A CONTINUOUS PHASE COMPRISING AN AQUEOUS LIQUID, A DISPERSE PHASE COMPRISING A HYDROCARBON OIL, AND A MINOR AMOUNT OF A NON-IONIC EMULSIFYING AGENT COMPRISING A SURFACETENSION-REDUCING POLYOYALKYLENE COMPOUND.
Claim 2
Dependent Claim
68 words
IN THE METHOD OF DRILLING THROUGH A SUBSURFACE FORMATION WHEREIN A DRILLING FLUID IS CONTINUOUSLY CIRCULATED THROUGH A DRILL PIPE AND DRILLING BIT, THE IMPROVEMENT WHICH COMPRISES PASSING TO THE DRILLING BIT A SUBSTANTIALLY SOLIDS-FREE OIL-IN-WATER EMULSION DRILLING FLUID INCLUDING A CONTINUOUS PHASE COMPRISING AN AQUEOUS LIQUID, A DISPERSE PHASE COMPRISING A HYDROCARBON OIL, AND A MINOR AMOUNT OF A NON-IONIC EMULSIFYING AGENT COMPRISING A SURFACETENSION-REDUCING POLYOYALKYLENE COMPOUND.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |