US2734860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table vi
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE ART OF JRILLING WELLS BY THE EMPLOYMENT OF AN AQUEOUS CLAY-LADEN WELL-DRILLING FLUID WHICH IS SUBJECT TO ADDITIONS THERETO OF FORMATION SOLIDS, FLUIDS AND SALTS DURING THE COURSE OF DRILLING, THE PROCESS COMPRISING, PUMPING THE DRILLING FLUID INTO THE BORE-HOLE AND BACK TO THE SURFACE AND ADDING TO SUCH A FLUID DURING THE COURSE OF DRILLING FINELY DIVIDED LINSEED HULLS IN AMOUNTS SUFFICIENT TO DEPOSITE THE SAME ON THE WALL OF THE BORE-HOLE SO AS TO MAINTAIN A LOW WATER LOSS OF AT MOST 10 C. C. A. P. I.
Claim 2
Dependent Claim
92 words
IN THE ART OF JRILLING WELLS BY THE EMPLOYMENT OF AN AQUEOUS CLAY-LADEN WELL-DRILLING FLUID WHICH IS SUBJECT TO ADDITIONS THERETO OF FORMATION SOLIDS, FLUIDS AND SALTS DURING THE COURSE OF DRILLING, THE PROCESS COMPRISING, PUMPING THE DRILLING FLUID INTO THE BORE-HOLE AND BACK TO THE SURFACE AND ADDING TO SUCH A FLUID DURING THE COURSE OF DRILLING FINELY DIVIDED LINSEED HULLS IN AMOUNTS SUFFICIENT TO DEPOSITE THE SAME ON THE WALL OF THE BORE-HOLE SO AS TO MAINTAIN A LOW WATER LOSS OF AT MOST 10 C. C. A. P. I.
References Cited (Backward Citations)
US275642A
Cited
US675423A
Cited
US683787A
Cited
US734239A
Cited
US2271696A
Cited
US2464434A
Cited
US2399986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |