Purified paraffins as lubricants, rate of penetration enhancers, and spotting fluid additives for water-based drilling fluids
US5837655A · kind A · utility
36Cited by
16References
25Claims
0Family size
Inventors
Key dates
| Filing date | May 1, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/905
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides non-toxic, biodegradable purified paraffins which may be used as lubricants, rate of penetration enhancers, and/or spotting fluids for water-based drilling muds. When used as a spotting fluid additive, the paraffin isomers preferably are supplemented with functional additives, namely emulsifiers, viscosifiers, surfactants, and/or brine. When used as lubricants and/or rate of penetration enhancers, the paraffin isomers preferably are used alone or in combination with surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.