| 摘要 |
In relation to the prior art, the device and the method of the invention offer the advantage of significantly reducing localized wear on the system for intercepting and redistributing the drilling fluid, through exploitation of auxiliary chambers that are placed in fluid communication with one another and that thereby make it possible to sustain even the high flow rates required for wells of larger dimensions and/or that use bottom hole equipment to impart rotation to the drill bit (normally hydraulic motors or turbines). |
