US3084121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of drilling fluid
Assignee: ExxonMobil Oil Corp
•
Filing: 1959-02-11
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Granted: 1963-04-02
•
Expires: 1979-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ludwig D Wiener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN THE DRILLING OF A WELL WHEREIN THERE IS CIRCULATED IN SAID WELL A DRILLING FLUID CONTAINING WATER AND LIME, THE STEPS COMPRISING ADDING SODIUM BICARBONATE TO SAID DRILLING FLUID IN AN AMOUNT EQUIVALENT TO AT LEAST TWICE THE AMOUNT OF SAID LIME IN SAID DRILLING FLUID AND ADDING A CALCIUM SALT OF A STRONG ACID TO SAID DRILLING FLUID IN AN AMOUNT EQUIVALENT TO AT LEAST SAID AMOUNT OF SAID LIME IN SAID DRILLING FLUID, WHEREBY SAID LIME REACTS WITH SAID SODIUM BICARBONATE TO PRECIPITATE THE CALCIUM ION OF SAID IN SAID DRILLING FLUID, WHEREBY SAID LIME REACTS WITH SAID LIME IN THE FORM OF CALCIUM CARBONATE AND SAID CALCIUM SALT OF A STRONG ACID REACTS WITH THE CONCOMITANTLY FORMED ALKALINE SODIUM CARBONATE TO PRECIPITATE THE CARBONATED ION OF SAID SODIUM CARBONATE IN THE FORM OF CALCIUM CARBONATE AND FORM THE NEUTRAL SODIUM SALT OF SAID STRONG ACID, AND THEREBY THE ALKALINITY OF SAID DRILLING FLUID IS REDUCED, SAID CIRCULATING SAID DRILLING FLUID IN SAID WELL.
Claim 2
Dependent Claim
167 words
IN THE DRILLING OF A WELL WHEREIN THERE IS CIRCULATED IN SAID WELL A DRILLING FLUID CONTAINING WATER AND LIME, THE STEPS COMPRISING ADDING SODIUM BICARBONATE TO SAID DRILLING FLUID IN AN AMOUNT EQUIVALENT TO AT LEAST TWICE THE AMOUNT OF SAID LIME IN SAID DRILLING FLUID AND ADDING A CALCIUM SALT OF A STRONG ACID TO SAID DRILLING FLUID IN AN AMOUNT EQUIVALENT TO AT LEAST SAID AMOUNT OF SAID LIME IN SAID DRILLING FLUID, WHEREBY SAID LIME REACTS WITH SAID SODIUM BICARBONATE TO PRECIPITATE THE CALCIUM ION OF SAID IN SAID DRILLING FLUID, WHEREBY SAID LIME REACTS WITH SAID LIME IN THE FORM OF CALCIUM CARBONATE AND SAID CALCIUM SALT OF A STRONG ACID REACTS WITH THE CONCOMITANTLY FORMED ALKALINE SODIUM CARBONATE TO PRECIPITATE THE CARBONATED ION OF SAID SODIUM CARBONATE IN THE FORM OF CALCIUM CARBONATE AND FORM THE NEUTRAL SODIUM SALT OF SAID STRONG ACID, AND THEREBY THE ALKALINITY OF SAID DRILLING FLUID IS REDUCED, SAID CIRCULATING SAID DRILLING FLUID IN SAID WELL.
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |