Polymer elastic particle reservoir protecting agent and drilling fluid containing the same
US9771509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2017 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Jan 6, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the technical field of petroleum drilling. An intermediate product of a reservoir protecting agent, a reservoir protecting agent, a preparing method and use thereof, a drilling fluid and use thereof are disclosed. The intermediate product of a reservoir protecting agent is made of raw materials comprising acrylamide, a cationic monomer, a cross-linking agent, an initiator, a toughening material and water, and based on the raw materials of 100 parts by weight, the use amounts of the acrylamide, the cationic monomer, the cross-linking agent, the initiator and the toughening material are respectively 8-30, 1-10, 0.01-0.5, 0.01-0.1, 5-25 parts by weight. The reservoir protecting agent includes the intermediate product of the present invention, base, salt, and water, and based on the reservoir protecting agent of 100 parts by weight, the use amounts of the intermediate product, base, and salt are respectively 5-40, 1-10, and 1-12 parts by weight. The reservoir protecting agent of the present invention has a good blocking effect and can improve the capability of the drilling fluid to protect the reservoir, enhance the capability of the drilling fluid to s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.