Well treating fluid and corrosion inhibitor
Abstract
Abstract AN IRON CRRROSION INHIBITOR IS COUPLED TO A WEIGHTING MATERIAL TO PRODUCE A LIQUID FORMULATION WHICH WILL FALL THROUGH OIL IN WELL ANNULUS WITHOUT SEPARATION BUT AFTER IT HAS FALLEN THROUGH WATER BENEATH THE OIL THE INHIBITOR WILL SEPARATE FROM THE WEIGHTING MATERIAL AND FLOAT BACK TO THE OIL-WATER INTERFACE WHERE IT CAN ENTER WELL TUBING PORTS. THE INHIBITOR INCLUDES CARBOXYLIC ACID, E.G. PETROLEUM WAX OXIDATE, TYPE INHIBITOR REACTED WITH AMINE TYPE CORROSION INHIBITOR AND DISPERSED IN AN ORGANIC SOLVENT SYSTEM. SULFONIC ACID MAY BE USED TO DISPERSE THE WATER INSOLUBLE AMINES. THE WEIGHTING MATERIAL IS WATER SOLUBLE METAL SALT INCCLUDING ZINC CHLORIDE. USUALLY AN ALCOHOL IS THE COUPLING AGENT.
Inventors
- 👤 C Bundrant
- 👤 C Hainebach
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |