Drilling fluid composition and process for drilling subterranean wells
Abstract
Abstract THE PRESENT INVENTION RELATES TO A NOVEL DRILLING FLUID COMPOSITION CONSISTING ESSENTIALLY OF (1) A MACROMOLECULAR POLYSACCHARIDE AQUEOUS SOLUTION, AND (2) A METAL ION BUFFERED CROSS-LINKING AGENT FOR SAID SOLUTION CONSISTING ESSENTIALLY OF (A) AN ORGANIC POLYELECTROLYTYE LIGAND COMPONENT, AND (B) A METAL COMPONENT OF THE FIRST SERIES OF THE TRANSITION ELEMENTS OF THE PERIODIC TABLE. THIS DRILLING FLUID HAS BEEN FOUND TO PROVIDE ENHANCED RHEOLOGICAL PROPERTIES WITHOUT OBTAINING METAL ION OVERTREATMENT CHARACTERISTICS. IN A PREFERRED FORM, SAID DRILLING FLUID HAS METAL ION BUFFERED CROSS-LINKING AGENT ADDITIONALLY CONTAINING A COMPOUND OF A METAL FORM GROUP II OF THE PERIODIC TABLE. A PROCESS FOR DRILLING A SUBTERRANEAN WELL WITH THE PRESENT DRILLING FLUID COMPOSITION IS ALSO INCORPORATED.
Inventors
- 👤 William C Browning
- 👤 Billy G Chesser
Bibliographic Details
Claims Analysis
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |