Reducing fluid loss in a drilling fluid
US6730637B1 · kind B1 · utility
17Cited by
8References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2002 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a low toxicity drilling mud oil. In some embodiments, the fluid loss characteristic of the drilling mud oil as used in a borehole can be reduced to less than 0.2 ml/30 minutes by adding about 0.05% to about 2.0% by weight of a butadiene-styrene-butadiene (BSB) block copolymer having about 20% by weight or more styrene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.