Sealed coring device for underground coalbed

US12421820B2 · kind B2 · utility

Assignee

• ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

• Sheng XUE · Huainan City, CN
• Lefan Wang · Huainan City, CN
• Xiaoliang Zheng · Hudson, US
• Ping Liu · Hunan, CN
• Chen Shen · Beijing, CN
• Gang Jin · Shanghai, CN
• Weibo Liu · Xi'an, CN
• Sihang Zhang · Huainan City, CN
• Jingyi Zhou · South River, US

Key dates

• Filing date: May 17, 2023
• Grant date: Sep 23, 2025
• Expiry date: May 17, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N1/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The sealed coring device for an underground coalbed comprises a rib drill pipe assembly, a tail bearing pack, a motor cylinder assembly and a sampling cylinder assembly. The rib drill pipe assembly consists of a rib drill pipe, a tail drill pipe joint and a head drill pipe joint. The tail bearing pack is mounted in the tail drill pipe joint and configured for protecting an internal structure from relatively rotating during drilling of the rib drill pipe, so that the stability of the sampling cylinder is ensured. The motor cylinder assembly is mounted in the rib drill pipe and configured for providing power for action of a center shaft in the sampling cylinder assembly.