US3837402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing oil from around a wellbore
Assignee: Radon Dev Corp
•
Filing: 1972-12-01
•
Granted: 1974-09-24
•
Expires: 1992-12-01
Abstract
Abstract Chemical combination of 1) the reaction of fatty acid with diethanolamine, and 2) ingredient to enhance such reactant''s solubility in water, the combination then, on dilution being used to transfer, suspend or remove petroleum or its products.
Inventors
- 👤 C Stringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:34
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; C09K23/00; C09K23/017; C09K8/58; C09K8/584; C09K8/592; E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; Y; Y10; Y10S; Y10S507/00; Y10S507/935
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
The process of claim 1 wherein said mixture is inserted into said well bore along with water, said water having a ratio to said mixture of upwards of 95 to 1.
Claim 2
Dependent Claim
20 words
The process of claim 1 wherein steam is injected within said well bore following said insertion of said aqueous mixture.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said aqueous mixture is comprised of equal volumetric quantities of said lauric-diethanolamine, isopropyl alcohol and water.
References Cited (Backward Citations)
US3452817A
Cited
US3470958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |