Patent US3279541A successfully refreshed from Google Patents.
US3279541A
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US
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Method for removing paraffinic and asphaltic residues from wells
Assignee: Halliburton Co
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Filing: 1965-08-20
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Granted: 1966-10-18
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 John A Knox
- 👤 Reginald M Lasater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:09
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/93; Y10S507/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF TREATING WELLS FOR THE REMOVAL OF PARAFFINIC AND ASPHALTIC RESIDUES, COMPRISING THE STEPS OF: (A) MIXING A LIGHT PARAFFIN SOLVENT, AN AQUEOUS MEDIUM, AN EMULSIFYING AGENT, AND A CHEMICAL CAPABLE OF GENERATING HEAT WHEN CONTACTED WITH SAID AQUEOUS MEDIUM TO PROVIDE A HEATED EMUSLION HAVING AN EFFECTIVE SPECIFIC GRAVITY GREATER THAN THE SPECIFIC GRAVITY OF SAID LIGHT PARAFFIN SOLVENT, SAID HEAT GENERATING CHEMICAL BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, MAGNESIUM CHLORIDE, CALCIUM CHLORIDE, SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND MIXTURES THEREOF AND THE AQUEOUS MEDIUM AND LIGHT PARAFFIN SOLVENT BEING SEPARATELY INTO DUCED INTO THE WELL; (B) CONTACTING THE PARAFFINIC AND ASPHALTIC RESIDUES WITH THE HEATED EMULSION, THEREBY LOOSENING AND DISSOLVING THE RESIDUES; AND (C) REMOVING THE LOOSENED AND DISSOLVED RESIDUES.
Claim 2
Independent Claim
126 words
A METHOD OF TREATING WELLS FOR THE REMOVAL OF PARAFFINIC AND ASPHALTIC RESIDUES, COMPRISING THE STEPS OF: (A) MIXING A LIGHT PARAFFIN SOLVENT, AN AQUEOUS MEDIUM, AN EMULSIFYING AGENT, AND A CHEMICAL CAPABLE OF GENERATING HEAT WHEN CONTACTED WITH SAID AQUEOUS MEDIUM TO PROVIDE A HEATED EMUSLION HAVING AN EFFECTIVE SPECIFIC GRAVITY GREATER THAN THE SPECIFIC GRAVITY OF SAID LIGHT PARAFFIN SOLVENT, SAID HEAT GENERATING CHEMICAL BEING SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, MAGNESIUM CHLORIDE, CALCIUM CHLORIDE, SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND MIXTURES THEREOF AND THE AQUEOUS MEDIUM AND LIGHT PARAFFIN SOLVENT BEING SEPARATELY INTO DUCED INTO THE WELL; (B) CONTACTING THE PARAFFINIC AND ASPHALTIC RESIDUES WITH THE HEATED EMULSION, THEREBY LOOSENING AND DISSOLVING THE RESIDUES; AND (C) REMOVING THE LOOSENED AND DISSOLVED RESIDUES.
References Cited (Backward Citations)
US3127345A
Cited
US119883A
Cited
US47410A
Cited
US1351945A
Cited
US1513371A
Cited
US1963072A
Cited
US2139595A
Cited
US2218306A
Cited
US2342656A
Cited
GB778819A
Cited
US2753939A
Cited
US2799342A
Cited
US2889884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |