US2776112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling wells
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-09-30
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Granted: 1957-01-01
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 William T Ilfrey
- 👤 Charles L Prokop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD FOR DRILLING A WELL IN WHICH A HOLLOW DRILL STEM HAVING A DRILL BIT ATTACHED THERETO IS ROTATED TO FORM A BOREHOLE IN THE EARTH''S SURFACE WHICH COMPRISES CIRCULATING A DRILLING FLUID COMPRISING A SLURRY OF CEMENT IN A HYDROCARBON AND AN AMOUNT OF THE REACTION PRODUCT RESULTING FROM TREATING A WATER SLURRY OF HIGH-GRADE SODIUM BENTONITE WITH ONE OF THE LARGER QUATERNARY AMMONIUM COMPLEXES DOWN SAID DRILL STEM AND OUT THROUGH EYES IN SAID DRILL BIT AND THEN UPWARDLY IN SAID BOREHOLE AROUND SAID DRILL STEM TO DEPOSIT A THIN, WATER-REACTIVE FILTER CAKE ON THE WALLS OF SAID BOREHOLE, SAID CEMENT, HYDROCARBON, AND REACTION PRODUCT BEING PRESENT IN SAID SLURRY IN SUFFICIENT AMOUNTS TO FORM SAID FILTER CAKE, SAID CEMENT BEING SELECTED FROM THE GROUP CONSISTING OF PORTLAND CEMENT; POZZOLANA AND LIME MIXTURE; SAID AND LIME MIXTURE; AND PLASTER OF PARIS.
Claim 2
Independent Claim
144 words
A METHOD FOR DRILLING A WELL IN WHICH A HOLLOW DRILL STEM HAVING A DRILL BIT ATTACHED THERETO IS ROTATED TO FORM A BOREHOLE IN THE EARTH''S SURFACE WHICH COMPRISES CIRCULATING A DRILLING FLUID COMPRISING A SLURRY OF CEMENT IN A HYDROCARBON AND AN AMOUNT OF THE REACTION PRODUCT RESULTING FROM TREATING A WATER SLURRY OF HIGH-GRADE SODIUM BENTONITE WITH ONE OF THE LARGER QUATERNARY AMMONIUM COMPLEXES DOWN SAID DRILL STEM AND OUT THROUGH EYES IN SAID DRILL BIT AND THEN UPWARDLY IN SAID BOREHOLE AROUND SAID DRILL STEM TO DEPOSIT A THIN, WATER-REACTIVE FILTER CAKE ON THE WALLS OF SAID BOREHOLE, SAID CEMENT, HYDROCARBON, AND REACTION PRODUCT BEING PRESENT IN SAID SLURRY IN SUFFICIENT AMOUNTS TO FORM SAID FILTER CAKE, SAID CEMENT BEING SELECTED FROM THE GROUP CONSISTING OF PORTLAND CEMENT; POZZOLANA AND LIME MIXTURE; SAID AND LIME MIXTURE; AND PLASTER OF PARIS.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |