Patent FR1149342A successfully refreshed from Google Patents.
Patent US3427651A successfully refreshed from Google Patents.
US3427651A
Expired / Lapsed
US
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Well control
Assignee: ExxonMobil Upstream Research Co
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Filing: 1966-11-23
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Granted: 1969-02-11
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Expires: 1986-11-23
Abstract
No abstract record available.
Inventors
- 👤 Walter J Bielstein
- 👤 Otto R Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:24
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B33/1272; E21B21/00; E21B21/10; E21B21/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR CONTROLLING FORMATION CONDITIONS IN A BOREHOLE HAVING A DRILL STRING WITH A FULLY OPEN BORE THERETHROUGH AND WITH A DRILL BIT ON THE LOWER END THEREOF POSITIONED THEREIN WHICH COMPRISES THE STEPS OF: SEALING OFF THE ANNULUS BETWEEN SAID DRILL STRING AND THE BOREHOLE WALL WHILE MAINTAINING SAID BORE THROUGH SAID DRILL STRING FULLY OPEN; OPENING A CIRCULATION PORT IN SAID DRILL STRING ABOVE SAID SEALED-OFF ANNULUS; AND CIRCULATING FLUID DOWN SAID DRILL STRING THROUGH SAID CIRCULATION PORT AND UP THE ANNULUS BETWEEN SAID DRILL STRING AND THE BOREHOLE WALL.
Claim 2
Independent Claim
93 words
A METHOD FOR CONTROLLING FORMATION CONDITIONS IN A BOREHOLE HAVING A DRILL STRING WITH A FULLY OPEN BORE THERETHROUGH AND WITH A DRILL BIT ON THE LOWER END THEREOF POSITIONED THEREIN WHICH COMPRISES THE STEPS OF: SEALING OFF THE ANNULUS BETWEEN SAID DRILL STRING AND THE BOREHOLE WALL WHILE MAINTAINING SAID BORE THROUGH SAID DRILL STRING FULLY OPEN; OPENING A CIRCULATION PORT IN SAID DRILL STRING ABOVE SAID SEALED-OFF ANNULUS; AND CIRCULATING FLUID DOWN SAID DRILL STRING THROUGH SAID CIRCULATION PORT AND UP THE ANNULUS BETWEEN SAID DRILL STRING AND THE BOREHOLE WALL.
References Cited (Backward Citations)
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Cited
US2082111A
Cited
US2637401A
Cited
US3044553A
Cited
US3151690A
Cited
US3236307A
Cited
US3322215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |