Patent US3293177A successfully refreshed from Google Patents.
US3293177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of rheological properties of drilling fluid
Assignee: Phillips Petroleum Co
•
Filing: 1963-05-17
•
Granted: 1966-12-20
•
Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Charles A Stratton
- 👤 Mark W Braustetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:45
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
78 words
A WATER BASE DRILLING MUD COMPRISING, IN COMBINATION: SUFFICIENT WATER TO MAINTAIN SAID WATER MUD FLUID; SUFFICIENT SUSPENDED SOLIDS TO FORM A FILTER CAKE ON THE WALL OF A WELL; A SUFFICIENT AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,7-NAPHTHALENEDIOL, AMMONIUM, ALKALI METAL, AND ALKALINE EARTH METAL SALTS THEREOF, AND CORRESPONDING OXIDATION PRODUCTS THEREOF SELECTED FROM NAPHTHOQUINONE, NAPHTHOQUINHYDRONE, SEMIQUINONE RADICAL AND SEMIQUINONE RADICAL-ANION TO MAINTAIN THE VISCOSITY OF SAID MUD LOW ENOUGH TO BE CIRCULATED.
Claim 2
Dependent Claim
78 words
A WATER BASE DRILLING MUD COMPRISING, IN COMBINATION: SUFFICIENT WATER TO MAINTAIN SAID WATER MUD FLUID; SUFFICIENT SUSPENDED SOLIDS TO FORM A FILTER CAKE ON THE WALL OF A WELL; A SUFFICIENT AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,7-NAPHTHALENEDIOL, AMMONIUM, ALKALI METAL, AND ALKALINE EARTH METAL SALTS THEREOF, AND CORRESPONDING OXIDATION PRODUCTS THEREOF SELECTED FROM NAPHTHOQUINONE, NAPHTHOQUINHYDRONE, SEMIQUINONE RADICAL AND SEMIQUINONE RADICAL-ANION TO MAINTAIN THE VISCOSITY OF SAID MUD LOW ENOUGH TO BE CIRCULATED.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |