High-frequency composite impactor
US11927077B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 2022 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Oct 12, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B28/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A high-frequency composite impactor including a high-frequency axial and a torsional impact assembly is disclosed. The high-frequency axial impact assembly includes an upper self-excited oscillation cavity, a lower self-excited oscillation cavity, an adjustment block and a lock nut. The torsional impact assembly includes an upper end cover, a reversing switch, a pendulum, a lower shell, a lower end cover, a nozzle, a connecting block and a retaining ring. The high-frequency axial impact assembly converts the flowing drilling fluid into a pulsed jet to achieve a high-frequency axial impact. The torsional impact assembly enables a torsional impact through a shunt, and finally enables a high-frequency composite impact, which can effectively reduce the stick-slip of the drill string, jump drilling and other downhole accidents. By reducing the friction between the drill string and the borehole wall, the impactor can reduce WOB loss, increase the ROP, and improve the drilling efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.