US3126971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill string stabilizer
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/10; E21B17/00; E21B17/10; E21B17/1014; E21B7/06; E21B7/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A DRILL STRING STABLIZER COMPRISING IN COMBINATION A TUBULAR MANDREL CONTAINING A LATERAL PORT; AN OUTER SLEEVE ON SAID MANDREL WITHIN WHICH THE MANDREL IS FREE TO ROTATE, SAID SLEEVE EXTENDING ABOVE AND BELOW SAID PORT; UPPER SEALING MEANS BETWEEN SAID SLEEVE AND MANDREL ABOVE SAID PORT; LOWER SEALING MEANS BETWEEN SAID SLEEVE AND MANDREL BELOW SAID PORT; A PLURALITY OF HYDRAULICALLY-EXTENSIBLE SHOE ASSEMBLIES MOUNTED IN RECESSES IN THE OUTER SURFACE OF SAID SLEEVE, SAID SLEEVE CONTAINING PASSAGEWAYS EXTENDING FROM EACH OF SAID RECESSES TO THE INNER SURFACE OF THE SLEEVE BETWEEN SAID UPPER AND LOWER SEALING MEANS; VALVES IN SAID SLEEVE FOR CONTROLLING FLOW THROUGH EACH OF SAID PASSAGEWAYS INDIVIDUALLY; MEANS FOR MAINTAINING SAID VALVES IN A NORMALLY CLOSED POSITION; AND MEANS FOR OPENING SAID VALVES INDIVIDUALLY IN RESPONSE TO CONTACT BETWEEN SAID STABILIZER AND THE LOWER SIDE OF A SLOPING BOREHOLE.
Claim 2
Dependent Claim
143 words
A DRILL STRING STABLIZER COMPRISING IN COMBINATION A TUBULAR MANDREL CONTAINING A LATERAL PORT; AN OUTER SLEEVE ON SAID MANDREL WITHIN WHICH THE MANDREL IS FREE TO ROTATE, SAID SLEEVE EXTENDING ABOVE AND BELOW SAID PORT; UPPER SEALING MEANS BETWEEN SAID SLEEVE AND MANDREL ABOVE SAID PORT; LOWER SEALING MEANS BETWEEN SAID SLEEVE AND MANDREL BELOW SAID PORT; A PLURALITY OF HYDRAULICALLY-EXTENSIBLE SHOE ASSEMBLIES MOUNTED IN RECESSES IN THE OUTER SURFACE OF SAID SLEEVE, SAID SLEEVE CONTAINING PASSAGEWAYS EXTENDING FROM EACH OF SAID RECESSES TO THE INNER SURFACE OF THE SLEEVE BETWEEN SAID UPPER AND LOWER SEALING MEANS; VALVES IN SAID SLEEVE FOR CONTROLLING FLOW THROUGH EACH OF SAID PASSAGEWAYS INDIVIDUALLY; MEANS FOR MAINTAINING SAID VALVES IN A NORMALLY CLOSED POSITION; AND MEANS FOR OPENING SAID VALVES INDIVIDUALLY IN RESPONSE TO CONTACT BETWEEN SAID STABILIZER AND THE LOWER SIDE OF A SLOPING BOREHOLE.
References Cited (Backward Citations)
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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) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |