Drilling fluid additive composition and high temperature resistant clay-free whole-oil-based drilling fluid
US9481822B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2016 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the field of petrochemical drilling and discloses a drilling fluid additive composition. The composition contains rheological modifier, emulsifier and tackifier. Among them, the rheological modifier is dimer acid-organic amine copolymer comprising structural units from dimer acid, structural units from alkylamine and structural units from arylamine; the tackifier is modified polysiloxane nano-particles, and the modifying group Z on the polysiloxane nano-particles isthe emulsifier is one or more of the compounds represented by the following Formula (1). The present invention further provides a high temperature resistant clay-free whole-oil-based drilling fluid containing the foregoing composition. Through synergistic effect of the rheological modifier, the emulsifier and the tackifier in the composition, the present invention obtains a clay-free whole-oil-based drilling fluid with desirable suspending power and temperature resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.