US3123157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of drill cuttings from subsurface earth formations
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
E; E21; E21B; E21B27/00; E21B27/005; E21B49/00; E21B49/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
IN ROTARY DRILLING OF BOREHOLES IN THE EARTH WITH AN ELONGATED DRILL PIPE HAVING A DRILL BIT AT THE LOWER END THEREOF AND AN OPENABLE AND CLOSABLE PORT ABOVE THE DRILL BIT WHEREIN DRILLING FLUIDS, INCLUDING AIR AND LIQUIDS OF SPECIFIC GRAVITY LESS THAN 3, NORMALLY ARE CIRCULATED DOWN THE BORE OF THE DRILL PIPE AND UP THE ANNULUS THEREABOUT FOR THE PURPOSE OF REMOVING EARTH CUTTINGS PRODUCED DURING DRILLING OPERATIONS, THE METHOD OF RECOVERING EARTH CUTTINGS COMPRISING: LOWERING AN OPEN WEAVE BASKET INTO THE DRILL PIPE BORE, OPENING THE PORT, REVERSING THE DIRECTION OF DRILLING FLUID CIRCULATION TO CIRCULATE AT LEAST A PORTION OF THE DRILLING FLUID AND EARTH CUTTINGS ENTRAINED THEREIN UP THE BORE OF THE DRILL PIPE, AND PULLING THE BASKET UP THE
References Cited (Backward Citations)
US664902A
Cited
US1445575A
Cited
US1502622A
Cited
US2332267A
Cited
US2613916A
Cited
US2898086A
Cited
US2874781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |