Compositions and methods for cleaning a wellbore prior to cementing
US8517100B2 · kind B2 · utility
48Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2010 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | May 7, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/524
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Single-phase microemulsions, comprising a solvent, a surfactant blend and a carrier fluid, are effective spacer fluids for use during cementing operations. The solvent may be selected from the group consisting of monoterpenes, diterpenes, and alkyl or aryl esters of short-chain alcohols. The surfactant blend comprises a water-wetting surfactant or nonionic surfactant, a co-surfactant and an oil-solubilizing surfactant. The carrier fluid is aqueous. The solvent and surfactant blend are combined with the carrier fluid to produce the well-treatment microemulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.