Non-cryogenic production of nitrogen for on-site injection in downhole drilling
US5388650A · kind A · utility
33Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Jun 14, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed a method for oil or gas drilling or the drilling of a geothermal well and the like in which a compressed inert gas, produced by the non-cryogenic separation of air is delivered to the drilling region of the downhole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.