High-temperature cross-linking deep-well drilling fluid and preparation method thereof
US10005946B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2017 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Oct 27, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the deep-well drilling fluid field, and discloses a high-temperature crosslinking deep-well drilling fluid and a method for preparing the high-temperature crosslinking deep-well drilling fluid. The high-temperature crosslinking deep-well drilling fluid contains water, bentonite, sulfomethylated phenolic resin, sulfonated lignite, halide salt, filtrate reducer, sodium polyacrylate and barite, wherein, based on 100 parts by weight of water, the content of the bentonite is 3.5-5 parts by weight, the content of the sulfomethylated phenolic resin is 6-8 parts by weight, the content of the sulfonated lignite is 6-8 parts by weight, the content of the halide salt is 7.5-12 parts by weight, the content of the filtrate reducer is 0.5-1.2 parts by weight, the content of the sodium polyacrylate is 0.8-1.7 parts by weight, and the content of the barite is 250-300 parts by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.