Use of mono and polyalkylene glycol ethers as agents for the release of differentially stuck drill pipe
US4614235A · kind A · utility
40Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/94
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A formulation suitable for preparation of a spotting pill effective in the release of stuck pipe in a borehole during a drilling operation which formulation contains a mono and/or poly alkylene glycol ether and viscosified sufficiently to make the formulation compatible with a solids weighting material such as barite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.