US3200882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracturing of wells
Assignee: WELL SERVICE Inc
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Filing: 1961-11-27
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Granted: 1965-08-17
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Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Richard H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/2605
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESSS FOR FRACTRUING WELLS WHICH COMPRISES RUNNING A HIGH-PRESSURE PIPE INTO THE WALL AND PROVIDING A SEAL BETWEEN THE HIGH PRESSURE PIPE AND THE WELL WALL ABOVE THE STRATA TO BE FRACTURED, MAINTAINING BODY OF LIQUID IN THE WALL AT THE LEVEL OF THE STRATA TO BE FRACTURED SEALING THE BORE OF SAID PIPE AT A POINT WITHIN THE WELL AND MAINTAINING A GAS CAP BELOW SAID SEAL BETWEEN IT AND SAID BODY OF LIQUID, COMPRESSING GAS IN SAID PIPE ABOVE AID SEAL TO A PRESSURE OF AT LEAST 1,000 LBS. PER SQ. INCH WHILE MAINTAINING THE PRESSURE OF SAID GAS CAP AT NOT MORE THAN ABOUT 1/10 OF SAID PRESSURE ABOVE SAOD SEAL AND SUDDENLY RELEASING SAID PRESSURE THROUGH SAID SEAL.
Claim 2
Dependent Claim
123 words
A PROCESSS FOR FRACTRUING WELLS WHICH COMPRISES RUNNING A HIGH-PRESSURE PIPE INTO THE WALL AND PROVIDING A SEAL BETWEEN THE HIGH PRESSURE PIPE AND THE WELL WALL ABOVE THE STRATA TO BE FRACTURED, MAINTAINING BODY OF LIQUID IN THE WALL AT THE LEVEL OF THE STRATA TO BE FRACTURED SEALING THE BORE OF SAID PIPE AT A POINT WITHIN THE WELL AND MAINTAINING A GAS CAP BELOW SAID SEAL BETWEEN IT AND SAID BODY OF LIQUID, COMPRESSING GAS IN SAID PIPE ABOVE AID SEAL TO A PRESSURE OF AT LEAST 1,000 LBS. PER SQ. INCH WHILE MAINTAINING THE PRESSURE OF SAID GAS CAP AT NOT MORE THAN ABOUT 1/10 OF SAID PRESSURE ABOVE SAOD SEAL AND SUDDENLY RELEASING SAID PRESSURE THROUGH SAID SEAL.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |