Patent US4177957A successfully refreshed from Google Patents.
Patent US3115184A successfully refreshed from Google Patents.
US3115184A
Expired / Lapsed
US
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Method and apparatus for severing casings and the like
Assignee: WELL COMPLETIONS Inc
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Filing: 1960-01-04
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Granted: 1963-12-24
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Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Jackson John Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:18
CPC Classifications
E; E21; E21B; E21B29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF SEVERING A CASING AND THE LIKE IN A WELL BORE COMPRISING THE STEPS OF POSITIONING A CARBONACEOUS MATERIAL IN DIRECT PHYSICAL CONTACT WITH THE DESIRED LOCATION OF SEVERANCE OF THE CASING, BURNING AN EXPOSED PORTION OF THE MATERIAL WHILE DIRECTING AN AIR-GAS MIXTURE AGAINST THE EXPOSED PORTION OF THE MATERIAL TO CAUSE COMPLETE BURNING BOTH OF THE MATERIAL AND THE AIR-GAS MIXTURE, AND CONTINUOUSLY CIRCULATING THE GAS-AIR MIXTURE THROUGH THE CASING TO CAUSE DESTRUCTION OF THE CASING AND SUBSEQUENT REMOVAL OF THE WASTE MATERIAL ACCUMULATED DURING BURNING OF THE SUBSTANCE AND CASING SAID AIR-GAS MIXTURE BEING A MIXTURE OF A COMBUSTIBLE GAS AND SUFFICIENT AIR TO SUPPORT ITS COMBUSTION AND BEING CAPABLE OF PROVIDING
Claim 2
Independent Claim
117 words
A METHOD OF SEVERING A CASING AND THE LIKE IN A WELL BORE COMPRISING THE STEPS OF POSITIONING A CARBONACEOUS MATERIAL IN DIRECT PHYSICAL CONTACT WITH THE DESIRED LOCATION OF SEVERANCE OF THE CASING, BURNING AN EXPOSED PORTION OF THE MATERIAL WHILE DIRECTING AN AIR-GAS MIXTURE AGAINST THE EXPOSED PORTION OF THE MATERIAL TO CAUSE COMPLETE BURNING BOTH OF THE MATERIAL AND THE AIR-GAS MIXTURE, AND CONTINUOUSLY CIRCULATING THE GAS-AIR MIXTURE THROUGH THE CASING TO CAUSE DESTRUCTION OF THE CASING AND SUBSEQUENT REMOVAL OF THE WASTE MATERIAL ACCUMULATED DURING BURNING OF THE SUBSTANCE AND CASING SAID AIR-GAS MIXTURE BEING A MIXTURE OF A COMBUSTIBLE GAS AND SUFFICIENT AIR TO SUPPORT ITS COMBUSTION AND BEING CAPABLE OF PROVIDING
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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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |