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US3138213A
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Method and apparatus for vibratory drilling
Assignee: N A HARDIN
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Filing: 1954-06-24
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Granted: 1964-06-23
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Brandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:22
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/24; E21B10/00; E21B10/08; E21B10/26; E21B10/32; E21B10/34; E21B7/04; E21B7/06; E21B7/064
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A METHOD COMPRISING THE STEPS OF POSITIONING IN OPERATIVE CONTACT WITH A FORMATION A DRILL HAVING A DISCHARGE PORT FOR FLUID AND A TOOTHED ROLLER CUTTER POSITIONED CLOSELY ADJACENT THE DISCHARGE PORT IN THE STREAM OF FLUID DISCHARGED THERETHROUGH, AND PERIODICALLY MOVING THE ROLLER CUTTER TOWARDS AND FROM THE PORT TO PROVIDE A VARIABLE OBSTRUCTION TO THE FLUID DISCHARGED THEREFROM WHEREBY TO PRODUCE PRESSURE PULSATIONS IN THE FLUID.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |