Patent US3330367A successfully refreshed from Google Patents.
US3330367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill stem sidewall sampler
Assignee: Individual
•
Filing: 1965-02-02
•
Granted: 1967-07-11
•
Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Fletcher H Redwine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:45
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A SIDE WALL SAMPLING TOOL, THE COMBINATION OF: A SUB FOR CONNECTION IN A DRILL STEM HAVING A PRIMARY FLUID PASSAGEWAY EXTENDING LONGITUDINALLY THROUGH THE SUB FOR PASSING DRILLING FLUID THROUGH THE SUB, A FLUID CYLINDER FORMED IN THE SUB HAVING FIRST AND SECOND ENDS, A FLUID PISTON RECIPROCALLY DISPOSED IN THE CYLINDER, A SAMPLING TUBE CONNECTED TO THE PISTON AND EXTENDING THROUGH THE SECOND END OF THE CYLINDER FOR ENGAGING THE WALL OF A BOREHOLE WHEN EXTENDED AND COLLECTING A SAMPLE, A FIRST FLUID PASSAGEWAY PROVIDING FLUID COMMUNICATION BETWEEN THE PRIMARY FLUID PASSAGEWAY AND THE FIRST END OF THE FLUID CYLINDER, AND VALVE MEANS FOR SELECTIVELY DIRECTING FLUID PRESSURE FROM THE PRIMARY FLUID PASSAGEWAY TO THE FIRST FLUID PASSAGEWAY FOR DRIVING THE PISTON AND SAMPLING TUBE ON A SAMPLE-TAKING STROKE.
Claim 2
Dependent Claim
132 words
IN A SIDE WALL SAMPLING TOOL, THE COMBINATION OF: A SUB FOR CONNECTION IN A DRILL STEM HAVING A PRIMARY FLUID PASSAGEWAY EXTENDING LONGITUDINALLY THROUGH THE SUB FOR PASSING DRILLING FLUID THROUGH THE SUB, A FLUID CYLINDER FORMED IN THE SUB HAVING FIRST AND SECOND ENDS, A FLUID PISTON RECIPROCALLY DISPOSED IN THE CYLINDER, A SAMPLING TUBE CONNECTED TO THE PISTON AND EXTENDING THROUGH THE SECOND END OF THE CYLINDER FOR ENGAGING THE WALL OF A BOREHOLE WHEN EXTENDED AND COLLECTING A SAMPLE, A FIRST FLUID PASSAGEWAY PROVIDING FLUID COMMUNICATION BETWEEN THE PRIMARY FLUID PASSAGEWAY AND THE FIRST END OF THE FLUID CYLINDER, AND VALVE MEANS FOR SELECTIVELY DIRECTING FLUID PRESSURE FROM THE PRIMARY FLUID PASSAGEWAY TO THE FIRST FLUID PASSAGEWAY FOR DRIVING THE PISTON AND SAMPLING TUBE ON A SAMPLE-TAKING STROKE.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |