Patent US2599342A successfully refreshed from Google Patents.
US2599342A
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Increasing drilling fluid viscosity
Assignee: Standard Oil Development Co
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Filing: 1950-03-01
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Granted: 1952-06-03
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Expires: 1970-03-01
Abstract
No abstract record available.
Inventors
- 👤 Victor G Meadors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A DRILLING FLUID COMPRISING AN AQUEOUS DISPERSION OF A CLAY TO WHICH HAS BEEN ADDED A VISCOSITY INCREASING AMOUNT OF AN ORGANIC NITROGEN COMPOUND SELECTED FROM THE CLASS CON-U SISTING OF PIPERIDINE, PIPERIDINE HOMOLOGUES, AND ALIPHATIC AND CYCLOALIPHATIC AMINES, SAID NITROGEN COMPOUND HAVING A DISSOCIATION CONSTANT OF AT LEAST 1X10-4 AND HAVING A TOTAL OF NOT MORE THAN 15 CARBON ATOMS IN TH MOLECULE, SAID DRILLING FLUID HAVING A DENSITY IN THE RANGE OF 9 TO 18 LBS. PER GALLON.
Claim 2
Dependent Claim
80 words
A DRILLING FLUID COMPRISING AN AQUEOUS DISPERSION OF A CLAY TO WHICH HAS BEEN ADDED A VISCOSITY INCREASING AMOUNT OF AN ORGANIC NITROGEN COMPOUND SELECTED FROM THE CLASS CON-U SISTING OF PIPERIDINE, PIPERIDINE HOMOLOGUES, AND ALIPHATIC AND CYCLOALIPHATIC AMINES, SAID NITROGEN COMPOUND HAVING A DISSOCIATION CONSTANT OF AT LEAST 1X10-4 AND HAVING A TOTAL OF NOT MORE THAN 15 CARBON ATOMS IN TH MOLECULE, SAID DRILLING FLUID HAVING A DENSITY IN THE RANGE OF 9 TO 18 LBS. PER GALLON.
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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |