Drilling tool

US11946342B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• SINOPEC PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD. · CN

Inventors

• Baoping LU · Beijing, CN
• Haiping Zhang · Tangxia, CN
• Mingguang Sun · Beijing, CN
• Jiachang Wang · Beijing, CN
• Yanbin Zang · Beijing, CN
• Xinghua Tao · Jiaocheng District, CN
• Lingchao Xuan · Beijing, CN
• Xiaodan Liu · Beijing, CN
• Renlong Zhang · Beijing, CN
• Lishuang WANG · Beijing, CN

Key dates

• Filing date: Sep 11, 2020
• Grant date: Apr 2, 2024
• Expiry date: Jan 16, 2041

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B4/003
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A drilling tool includes an outer cylinder; a power rotary shaft arranged in an inner chamber of the outer cylinder; a percussion generator arranged below the power rotary shaft, having a transmission shaft extending in the outer cylinder and can be driven by the power rotary shaft to rotate around its axis, an output main shaft engaged with a lower end of the transmission shaft so as to be driven by the transmission shaft to rotate about its axis and is movable relative to the transmission shaft along an axial direction, and an percussion assembly The percussion assembly is arranged between an annulus formed between the upper end of the output main shaft and the outer cylinder and can generate reciprocating impact along the axial direction on the output main shaft. A drilling bit connected with the output main shaft extending out of the inner chamber of the outer cylinder.