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:
Oct. 26, 2021
Filed:
Nov. 20, 2018
Southwest Petroleum University, Sichuan, CN;
Jinzhou Zhao, Sichuan, CN;
Na Wei, Sichuan, CN;
Haitao Li, Sichuan, CN;
Liehui Zhang, Sichuan, CN;
Shouwei Zhou, Sichuan, CN;
Qingping Li, Sichuan, CN;
Wantong Sun, Sichuan, CN;
SOUTHWEST PETROLEUM UNIVERSITY, Sichuan, CN;
Abstract
A natural gas hydrate solid-state fluidization mining method and system under an underbalanced positive circulation condition, used for performing solid-state fluidization mining on a non-rock-forming weak-cementation natural gas hydrate layer in the ocean. Equipment includes a ground equipment system and an underwater equipment system. The construction procedure has an earlier-stage construction process, underbalanced hydrate solid-state fluidization mining construction process and silt backfilling process. Natural gas hydrates in the seafloor are mined through an underbalanced positive circulation method.