US3343615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill collar with cutting surface
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1966-08-15
•
Granted: 1967-09-26
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 William M Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/16; E21B10/00; E21B10/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A DRILL COLLAR COMPRISING AN ELONGATED MEMBER ADAPTED TO BE THREADEDLY ARRANGED IN AND FORM PART OF A ROTATABLE DRILL STRING EMPLOYED IN DRILLING A WELL AND PROVIDED WITH LONGITUDINALLY AND RADIALLY EXTENDING FINS FORMING A CROSS IN HORIZONTAL CROSS SECTION, EACH FIN BEING PERPENDICULAR TO THE NEXT FIN, SAID FINS EXTENDING CONTINUOUSLY SUBSTANTAILLY THE LENGTH OF SAID MEMBER AND HAVING AN OUTER CUTTING SURFACE ON THE PERIPHERY THEREOF, SAID FINS EXTENDING RADIALLY A DISTANCE SLIGHTLY LESS THAN THE GAUGE OF SAID WELL, SAID MEMBER HAVING A CONTINUOUS AXIAL FLUID PASSAGEWAY EXTENDING THERETHROUGH, SAID FINS HAVING A CROSS-SECTIONAL THICKNESS WITH THE RANGE FORM ABOUT HALF TO ABOUT TWICE THE DIAMETER OF SAID FLUID PASSAGEWAY, THE SPACES BETWEEN ADJACENT FINS PROVIDING PASSAGEWAYS FOR FLUID AND PROVIDING A SPACE BETWEEN THE WALL OF THE WALL DRILLED BY SAID DRILL STRING SUSBTANTIALLY EQUAL TO A RATIO OF HORIZONTAL CROSS-SECTIONAL AREA OF SAID DRILL COLLAR TO THE GAUGE OF SAID WELL WITHIN THE RANGE FROM ABOUT 3:1 TO ABOUT 15:1.
Claim 2
Dependent Claim
166 words
A DRILL COLLAR COMPRISING AN ELONGATED MEMBER ADAPTED TO BE THREADEDLY ARRANGED IN AND FORM PART OF A ROTATABLE DRILL STRING EMPLOYED IN DRILLING A WELL AND PROVIDED WITH LONGITUDINALLY AND RADIALLY EXTENDING FINS FORMING A CROSS IN HORIZONTAL CROSS SECTION, EACH FIN BEING PERPENDICULAR TO THE NEXT FIN, SAID FINS EXTENDING CONTINUOUSLY SUBSTANTAILLY THE LENGTH OF SAID MEMBER AND HAVING AN OUTER CUTTING SURFACE ON THE PERIPHERY THEREOF, SAID FINS EXTENDING RADIALLY A DISTANCE SLIGHTLY LESS THAN THE GAUGE OF SAID WELL, SAID MEMBER HAVING A CONTINUOUS AXIAL FLUID PASSAGEWAY EXTENDING THERETHROUGH, SAID FINS HAVING A CROSS-SECTIONAL THICKNESS WITH THE RANGE FORM ABOUT HALF TO ABOUT TWICE THE DIAMETER OF SAID FLUID PASSAGEWAY, THE SPACES BETWEEN ADJACENT FINS PROVIDING PASSAGEWAYS FOR FLUID AND PROVIDING A SPACE BETWEEN THE WALL OF THE WALL DRILLED BY SAID DRILL STRING SUSBTANTIALLY EQUAL TO A RATIO OF HORIZONTAL CROSS-SECTIONAL AREA OF SAID DRILL COLLAR TO THE GAUGE OF SAID WELL WITHIN THE RANGE FROM ABOUT 3:1 TO ABOUT 15:1.
References Cited (Backward Citations)
US1673924A
Cited
US2657907A
Cited
US2904313A
Cited
US3051255A
Cited
US3285678A
Cited
US3250578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |