Boring assembly and associated boring method
US11384602B2 · kind B2 · utility
0Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2019 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Jan 4, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/065
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A boring assembly extends along a main axis and comprises a boring head comprising at least one first nozzle and at least one second nozzle The or each second nozzle is different from the or each first nozzle. The boring assembly includes a first delivery device configured to deliver a jet of abrasive-free water at a pressure comprised between 2000 bar and 4000 bar to the at least one first nozzle. The boring assembly includes a second delivery device configured to deliver a jet containing at least one abrasive material at a pressure comprised between 2000 bar and 6000 bar to the at least one second nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.