Method and means for reduction of oxygen content in drilling fluid
US4136747A · kind A · utility
37Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1976 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Dec 17, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and means for using nitrogen exhaust gases or gaseous mixtures of combustible products for reduction of oxygen in drilling fluids during the drilling of well bores and which comprises utilizing nitrogen from normally waste exhaust gases or the like, injecting the nitrogen and other gases present into the usual drilling muds for replacing the oxygen contents of the drilling muds with the nitrogen gas, whereby corrosive action of the drilling muds is greatly reduced or substantially eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.