Spotting fluid for differential sticking
US6984611B2 · kind B2 · utility
8Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2003 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | Oct 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/94
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A new composition for a spotting fluid and a method of using such spotting fluid for freeing differential stuck pipe in a subterranean well drilling operation is disclosed. The composition comprises an invert water-in-oil emulsion comprising iso-butyl oleate as its external phase and glycerin as the internal phase. In an alterative embodiment, calcium chloride and water may be substituted for glycerin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.