The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2023
Filed:
Nov. 08, 2022
Applicant:
Southwest Petroleum University, Chengdu, CN;
Inventors:
Assignee:
SOUTHWEST PETROLEUM UNIVERSITY, Chengdu, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/035 (2006.01); C09K 8/42 (2006.01); C09K 8/24 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
C09K 8/426 (2013.01); C09K 8/24 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C09K 2208/10 (2013.01);
Abstract
Disclosed are a high-temperature-resistant tertiary amine-grafted silica nano-plugging agent and water-based drilling fluids, relating to oil-gas field drilling. The nano-plugging agent is prepared from a hydrazine compound, a diallyl compound, an enamine compound, silica particle, and an amino-containing silane coupling agent by stepwise reaction. The nano-plugging agent has a grain size of 58-280 nm.