Drilling fluids and method of drilling
US7122507B2 · kind B2 · utility
2Cited by
10References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | May 13, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Drilling, completing or workover of a well, particularly an oil and/or gas well, is carried out using a fluid which includes a continuous phase including an ester of the formula (I): (R2)p-Ph-(CH2)m—COO-(AO)n-R1 where R1, AO, n, m, Ph, R2 and p have defined meanings and particularly where the esters are alkyl or alkenyl benzoate esters. These esters are beneficial by having a range of viscosities, especially extending to low viscosities, and attractive toxicological and environmental profiles for use in drilling, completion and/or workover of wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.