Method for releasing stuck drill pipe
US4466486A · kind A · utility
16Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1983 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Apr 11, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/94
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is revealed for releasing a stuck drill string in a borehole of an underground formation by application of an additive fluid comprising fresh water or brine and a polymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.