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. 06, 2021
Filed:
Dec. 28, 2018
Petrochina Company Limited, Beijing, CN;
Baoqiang Lv, Beijing, CN;
Lijun Mu, Beijing, CN;
Zhenfeng Zhao, Beijing, CN;
Hongjun Lu, Beijing, CN;
Xiangqian Bu, Beijing, CN;
Yin Qi, Beijing, CN;
Jianshan Li, Beijing, CN;
Boping Zhao, Beijing, CN;
Xiangping Li, Beijing, CN;
Jianhui Li, Beijing, CN;
Li'an Yang, Beijing, CN;
Jun Bu, Beijing, CN;
PetroChina Company Limited, Beijing, CN;
Abstract
A low density, high-strength, degradable temporary plugging agent which includes 60% by weight to 85% by weight of polylactic acid, 5% by weight to 20% by weight of a starch, 5% by weight to 10% by weight of polycaprolactone, 2% by weight to 5% by weight of a solubilizing agent, and 2% by weight to 5% by weight of a toughening agent, based on 100% by weight of the total weight of the agent. The rigid agent can result in bridge plugging in existing cracks, with a significant increase in pressure. The preparation method is simple, the process requirements are low, and industrial production can be realized. When applied to temporary plugging fracturing, under formation conditions, it can be completely degraded within a certain period of time and will not cause secondary damage to the reservoir, while preventing the agent from polluting the formation and the occurrence of pump accidents.