US 12,234,699 B2
Inner tube assembly of drill tool and rope coring drill tool thereof
Xuyong Liu, Guangdong (CN); Guanghong Deng, Guangdong (CN); and Beihua Chen, Guangdong (CN)
Assigned to Guangdong Eagler Geological Equipment Technology Co., Ltd, Zhuhai (CN)
Filed by Guangdong Eagler Geological Equipment Technology Co., Ltd, Guangdong (CN)
Filed on Jun. 14, 2023, as Appl. No. 18/209,496.
Claims priority of application No. 202211733135.X (CN), filed on Dec. 30, 2022.
Prior Publication US 2024/0218756 A1, Jul. 4, 2024
Int. Cl. E21B 25/02 (2006.01); E21B 31/20 (2006.01); E21B 7/00 (2006.01)
CPC E21B 25/02 (2013.01) [E21B 31/20 (2013.01); E21B 7/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inner tube assembly of drill tool, comprising an inner tube assembly upper part (1a) and an inner tube assembly lower part (2a) which are rotatable relatively and connected together through a shaft (11) and a single action mechanism (1) comprising a bearing block (12) and a thrust ball bearing (13), wherein the thrust ball bearing (13) is built into a shaft part of the bearing block (12), the shaft (11) is connected to the thrust ball bearing in the bearing block (12), and the bearing block (12) is provided with a sealing ring seat (14) sealed with the shaft (11); and
wherein the shaft (11) is provided with a shaft sealing ring (111), and the shaft (11) is sealed with a sealing valve seat (36) by the shaft sealing ring (111).