Patent US3174545A successfully refreshed from Google Patents.
US3174545A
Expired / Lapsed
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Method of stimulating well production by explosive-induced hydraulic fracturing of productive formation
Assignee: Petroleum Tool Research Inc
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Filing: 1958-01-13
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Granted: 1965-03-23
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Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Henry H Mohaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
F; F42; F42B; F42B3/00; E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A METHOD OF FISSURING A PRODUCTIVE FORMATION INTO WHICH A WELL BORE EXTENDS, AND WHICH IS SUBMERGED IN LIQUID IN THE WELL BORE, TO INCREASE THE PERMEABILITY OF THE FORMATION AND THUS THE FLOW OF FLUID FROM THE FORMATION INTO THE WELL BORE, INCLUDING PROGRESSIVELY BURNING SUCCESSIVE PORTIONS OF A PROPELLANT EXPLOSIVE WHICH IS DISPERSED IN PARTICLE FORM IN THE LIQUID IN THE WELL BORE ADJACENT THE PRODUCTIVE FORMATION SO AS TO PRODUCE A SERIES
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |