Cavity creation tool by crushing with multi-stage controllable water jet for natural gas hydrate development

US11542789B2 · kind B2 · utility

Assignees

• Southwest Petroleum University · CN
• Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) · CN

Inventors

• Yang Tang · Pleasanton, US
• Peng Zhao · Xi'an, CN
• Guorong Wang · Chengdu, CN
• Jinhai Zhao · Houston, US
• Qingyou Liu · Chengdu, CN
• Jinzhong Wang · Chengdu, CN
• Guangjie Yuan · Chengdu, CN
• Yufa He · Beijing, CN
• Qingping Li · Hangzhou City, CN
• Xushen Li · Chengdu, CN
• Xiaoyu Fang · Zhanjiang, CN
• Zeliang LI · Chengdu, CN
• Xin Jing · Rochester, US

Key dates

• Filing date: Nov 29, 2021
• Grant date: Jan 3, 2023
• Expiry date: Nov 29, 2041

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B41/0078
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A cavity creation tool by crushing with multi-stage controllable water jet, it is used in natural gas hydrate development and mainly consists of an inner tube upper joint, an inner tube lower joint, an intermediate sleeve, an inner structure consisting of a coaxial throttle push rod, an outer layer sleeve, an outer layer structure consisting of a supporting ring, a jet head mounted to the intermediate sleeve and threading the outer layer sleeve, and a jet crushing structure consisting of a single-stage telescopic jet head and a two-stage telescopic jet head.