Patent US3289775A successfully refreshed from Google Patents.
US3289775A
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Apparatus and method for treating drilling mud
Assignee: Gulf Oil Corp
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Filing: 1963-07-24
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Granted: 1966-12-06
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Expires: 1983-07-24
Abstract
No abstract record available.
Inventors
- 👤 Virgil D Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD OF TREATING DRILLING MUDI CONTAINING CLAY SOLIDS USED IN A ROTARY PROCESS FOR DRILLING A WELL COMPRISIN PASSING ALL OF THE DRILLING MUD RETURNED FROM THE WELL THROUGH MEANS TO REMOVE SUBSTANTIALLY ALL SAND AND AT LEAST 85 PERCENT OF ALL SOLID PARTICLES HAVING A PARTICLE SIZE LARGER THAN 30 MOCRONS FROM THE DRILLING MUD TO FORM A LOW SILT DRILLING MUD CONTAINING CLAY SOLIDS IN WHICH THE MEDIAN CUT OF SOLID PARTICLES IS 10 TO 20 MICRONS AND DELIVERING ONLY A LOW SILT DRILLING MUD CONTAINING CLAY SOLIDS IN WHICH THE MEDIAN CUT OF SOLID PARTICLES IS 10 TO 20 MOCRONS TO THE SUCTION OF A SLUSH PUMP FOR CIRCULATING THE DRILLING MUD IN THE ROTARY DRILLING PROCESS.
Claim 2
Independent Claim
121 words
A METHOD OF TREATING DRILLING MUDI CONTAINING CLAY SOLIDS USED IN A ROTARY PROCESS FOR DRILLING A WELL COMPRISIN PASSING ALL OF THE DRILLING MUD RETURNED FROM THE WELL THROUGH MEANS TO REMOVE SUBSTANTIALLY ALL SAND AND AT LEAST 85 PERCENT OF ALL SOLID PARTICLES HAVING A PARTICLE SIZE LARGER THAN 30 MOCRONS FROM THE DRILLING MUD TO FORM A LOW SILT DRILLING MUD CONTAINING CLAY SOLIDS IN WHICH THE MEDIAN CUT OF SOLID PARTICLES IS 10 TO 20 MICRONS AND DELIVERING ONLY A LOW SILT DRILLING MUD CONTAINING CLAY SOLIDS IN WHICH THE MEDIAN CUT OF SOLID PARTICLES IS 10 TO 20 MOCRONS TO THE SUCTION OF A SLUSH PUMP FOR CIRCULATING THE DRILLING MUD IN THE ROTARY DRILLING PROCESS.
References Cited (Backward Citations)
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US2555265A
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US2870990A
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US2954871A
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US2941783A
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US2919898A
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |