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:
Mar. 30, 2021
Filed:
Jan. 04, 2019
Petrochina Company Limited, Beijing, CN;
Lijun Mu, Beijing, CN;
Xianwen Li, Beijing, CN;
Hongjun Lu, Beijing, CN;
Zhiying Deng, Beijing, CN;
Yong Wang, Beijing, CN;
Bin Yao, Beijing, CN;
Zhenning Ji, Beijing, CN;
Suiwang Zhang, Beijing, CN;
Xiaobing Lu, Beijing, CN;
Zhaojie Song, Beijing, CN;
Lei Sui, Beijing, CN;
Erzhen Wang, Beijing, CN;
PetroChina Company Limited, Beijing, CN;
Abstract
On-line diverting acids for continuous injection into water injection wells and methods of preparing the diverting acid are disclosed. The on-line diverting acids have a raw material composition of: 5.0-25.0% of hydrochloric acid, 3.0%-6.0% of ammonium fluoride, 4.0%-8.0% of a diverting agent, 3.0%-7.0% of a chelating agent, 1.0-3.0% of a corrosion inhibitor, 1.0-3.0% of an anti-swelling/swelled-clay-shrinking agent and a balance of water. The on-line diverting acids can remove plugging from deep zones of high and low permeability layers, and can be continuously injected to simplify the construction process, to achieve the purpose of reducing the pressure and stimulating the injection.