Patent US2836246A successfully refreshed from Google Patents.
US2836246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing liquid from well bore hole
Assignee: Phillips Petroleum Co
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Filing: 1956-08-30
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Granted: 1958-05-27
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Expires: 1976-08-30
Abstract
No abstract record available.
Inventors
- 👤 Robert S Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:22
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/084
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A METHOD OF TESTING A FORMATION DURING DRILLING OPERATIONS IN A WELL BORE THERIN WITHOUT REMOVAL OF THE DRILL STRING WHICH COMPRISES RUNNING A PACKER IN A HOLLOW DRILL STRING ABOVE BUT RELATIVELY CLOSE TO A BIT ON THE BOTTOM THEREOF: DRILLING LIQUID THRU THE DRILL FLOWING NON-COMPRESSIBLE DRILLING LIQYID THRU THE DRILL STRING AND OUT THROUGH AN ANNULUS BETWEEN SAID STRING AND THE WALL OF SAID WELL BORE; WHEN A FORMATION IS TO BE TESTED, SETTING SAID PACKER SO AS TO PACK OFF SAID ANNULUS WITHOUT REMOVING SAID DRILL STRING; DISPLACING SAID NON-COMPRESSIBLE DRILLING LIQYD FROM SAID DRILL STRING INTO SAID ANNULUS ABOVE SAID PACKER BY FORCING COMPRESSIBLE FLUID INTO SAID STRING FROM ITS UPPER END; WHEN THE MAJOR PORTION OF SAID NON-COMPRESSIBLE DRILLING
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |