Patent · US Active

Drilling speed increasing device

US11898417B2 · kind B2 · utility

0Cited by

0References

16Claims

0Family size

Assignees

Inventors

Jiachang Wang · Beijing, CN
Haiping Zhang · Tangxia, CN
Yanbin Zang · Beijing, CN
Mingguang Sun · Beijing, CN
Guangjun Ma · Beijing, CN
Lishuang WANG · Beijing, CN
Lingchao Xuan · Beijing, CN
Xiaodan Liu · Beijing, CN
Renlong Zhang · Beijing, CN

Key dates

Filing date	Sep 11, 2020
Grant date	Feb 13, 2024
Priority date	—
Expiry date	Sep 11, 2040

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B4/16
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drilling speed-enhancing device has an outer cylinder a rotary main shaft arranged in an inner chamber of the outer cylinder and configured to rotate around its own axis; an output main shaft arranged below the rotary main shaft and configured to be driven by the rotary main shaft to rotate around its own axis, a lower end of the output main shaft extending out of the inner chamber of the outer cylinder for connecting with a drilling bit of a dual-drive drilling tool; and a percussion generator arranged between the output main shaft and the outer cylinder. The percussion generator can drive the outer cylinder and the rotary main shaft to move upward relative to the output main shaft, so that under action of WOB, the rotary main shaft and the outer cylinder move downward to generate impact on the output main shaft.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.